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1038-00001 · Cascade Retail Holdings · Internal Memoranda & Analysis

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CALDERWOOD & HARKNESS LLP INTERNAL MEMORANDUM

Matter No.: 1038-00001

July 1, 2025

TO: Howard Bellamy, Responsible Partner, Antitrust & Competition Elaine Forsythe, Billing Partner, Antitrust & Competition

FROM: Elliot Nguyen, Lead Associate, Antitrust & Competition

RE: Case Assessment — FTC v. Cascade Retail Holdings Inc., Case No. 2:25-cv-01087-RAJ (W.D. Wash.); FTC Administrative Docket No. 9438

CC: Aaron Liu, Working Associate, Antitrust & Competition (Calderwood & Harkness LLP, San Francisco Office)

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I. Executive Summary

Calderwood & Harkness LLP was engaged on June 25, 2025, by Cascade Retail Holdings Inc. ("Cascade" or the "Company") to serve as lead defense counsel in the antitrust challenge brought by the Federal Trade Commission ("FTC" or the "Commission") to block Cascade's proposed $4.7 billion all-cash acquisition of Pinnacle Market Group Inc. ("Pinnacle"). The engagement follows the FTC's decision—authorized by a 3–2 Commission vote—to challenge the transaction under Section 7 of the Clayton Act, 15 U.S.C. § 18.

The FTC filed its administrative complaint (Docket No. 9438) on June 20, 2025, and simultaneously authorized staff to seek a preliminary injunction in federal court. The FTC's district court complaint was filed on June 23, 2025, in the United States District Court for the Western District of Washington, Case No. 2:25-cv-01087-RAJ, and the matter has been assigned to the Honorable Richard A. Johannsen. The Commission seeks a preliminary injunction under Section 13(b) of the FTC Act, 15 U.S.C. § 53(b), to consummation of the transaction pending the outcome of the FTC's administrative proceeding.

This memorandum provides an initial assessment of the FTC's complaint, evaluates the strength of the FTC's Section 7 theory, assesses the likelihood of the FTC obtaining a preliminary injunction under the Section 13(b) standard, identifies key documents and witnesses relevant to the defense, and recommends a comprehensive defense strategy framework for the preliminary injunction proceedings and beyond.

Preliminary Assessment. The FTC's case presents real but surmountable challenges. The Commission's reliance on a narrow product market definition—"online marketplace platform services for third-party sellers in the United States"—is the centerpiece of its competitive harm theory, but it is also the FTC's central vulnerability. By excluding direct-to-consumer e-commerce retail, social commerce platforms, and hybrid retail models, the FTC artificially inflates concentration levels and overstates the merger's competitive significance. We have strong arguments on efficiencies, as Cascade projects $340 million in annual merger-specific cost savings by Year 3, and on Pinnacle's weakening competitive position, which materially diminishes the anticompetitive potential of the transaction as measured by static market share data.

Our overall estimate of the likelihood of the FTC obtaining a preliminary injunction is approximately 35–45%. The range reflects meaningful uncertainty about how Judge Johannsen will treat the market definition question, which is the dispositive issue in the case. If the court accepts the FTC's narrow market, the structural presumption from the Herfindahl-Hirschman Index ("HHI") analysis is strong, and the burden will shift to the defendants to rebut the presumption with evidence of countervailing factors. If the court rejects or broadens the market definition, the FTC's case largely collapses. The 3–2 Commission vote further signals internal division on the merits and provides additional grounds for arguing that the FTC's theory is at the margins of antitrust enforcement.

Detailed memoranda on each defense pillar—market definition, competitive effects, efficiencies, weakening firm defense, the Section 13(b) legal standard, and a comprehensive case law survey—will follow in the coming weeks as discovery progresses and Dr. Priya Ramanathan's economic analysis takes shape.

II. Background and Transaction Overview

A. The Parties

1. Cascade Retail Holdings Inc.

Cascade Retail Holdings Inc. is a Delaware corporation headquartered at 2200 Westlake Avenue North, Suite 3400, Seattle, Washington 98109. The Company's shares are publicly traded on the Nasdaq Global Select Market under the ticker symbol "CSRT." As of June 27, 2025, Cascade's market capitalization was approximately $41.2 billion, making it one of the largest diversified retail companies in the United States.

Founded in 2003, Cascade operates a diversified retail business spanning three principal segments. First, the Company operates approximately 340 brick-and-mortar retail locations across 38 states, offering a broad assortment of consumer products including home goods, apparel, electronics, and general merchandise. Second, Cascade maintains a direct-to-consumer e-commerce platform, CascadeDirect.com, which serves as the Company's proprietary online retail channel. Third, and most relevant to this proceeding, Cascade operates a third-party seller marketplace known as "CascadeMarket," which was launched on June 1, 2019. CascadeMarket enables independent sellers to list and sell products to consumers through Cascade's platform in exchange for marketplace services including payment processing, customer service infrastructure, and optional fulfillment services.

For fiscal year 2024 (ending January 31, 2025), Cascade reported total consolidated revenue of $28.6 billion. The Company's e-commerce and marketplace segments generated combined revenue of approximately $9.3 billion. CascadeMarket alone generated gross merchandise volume ("GMV") of approximately $3.1 billion from approximately 42,000 active third-party sellers, yielding $527 million in marketplace services revenue at a 17% take rate. Cascade currently operates 22 fulfillment warehouses nationwide to support its e-commerce and marketplace logistics operations.

The following individuals hold key executive positions at Cascade and are expected to play significant roles in the litigation:

• Margaret "Meg" Thornberry — Chief Executive Officer & Chairwoman of the Board

• David Ruan — President & Chief Operating Officer

• Sonia Alvarez-Kirk — Chief Financial Officer

• Jerome Weston — General Counsel & Corporate Secretary

• Patricia "Trish" Delacroix — Senior Vice President, Marketplace & Platform Strategy

Mr. Weston will serve as the primary client contact for litigation purposes, though privilege considerations require careful management of communications given his dual role as General Counsel and potential fact witness regarding the transaction process and regulatory engagement.

2. Pinnacle Market Group Inc.

Pinnacle Market Group Inc. is a Delaware corporation headquartered at 500 East 6th Street, Suite 800, Austin, Texas 78701. Pinnacle's shares are publicly traded on the Nasdaq Global Select Market under the ticker symbol "PMGI." As of the last unaffected trading day prior to the merger announcement (March 7, 2025), Pinnacle's market capitalization was approximately $3.9 billion.

Pinnacle was founded in 2014 by Rajiv Chandravar and Lena Kowalski, who identified an opportunity to create a curated online marketplace platform connecting independent sellers with consumers across a range of product categories. The company initially focused on home goods and artisanal products but expanded over time into specialty foods, fashion, and consumer electronics. Pinnacle completed its initial public offering on September 18, 2020, and has since grown into one of the four largest online marketplace platforms in the United States.

As of fiscal year 2024 (ending December 31, 2024), Pinnacle hosted approximately 185,000 active third-party sellers on its platform. The company generated GMV of approximately $11.4 billion and reported net revenue of approximately $1.82 billion, reflecting a take rate of approximately 16%. Despite its strong market position and brand recognition, Pinnacle has experienced significant competitive headwinds in recent years, as discussed in greater detail in Section V.A.4 below.

Key executives at Pinnacle include:

• Rajiv Chandravar — Co-Founder & Chief Executive Officer

• Lena Kowalski — Co-Founder & Chief Product Officer

• Thomas Breck — Chief Financial Officer

• Anita Suresh — General Counsel

Pinnacle is separately represented in this litigation by Whitfield, Greer & Tanaka LLP, based in Austin, Texas. Diana Whitfield serves as Lead Partner, with Kenneth Oshiro serving as Senior Associate. As discussed in Section X below, we anticipate executing a Joint Defense and Common Interest Agreement with Whitfield, Greer & Tanaka on or about July 1, 2025, to facilitate coordination of the defense effort while preserving each party's independent counsel relationship.

B. Transaction Structure and Terms

Cascade and Pinnacle entered into an Agreement and Plan of Merger (the "Merger Agreement") on March 14, 2025. The transaction was publicly announced on March 17, 2025, and Cascade filed a Current Report on Form 8-K with the Securities and Exchange Commission on the same day. A Definitive Proxy Statement on Schedule 14A was subsequently filed on April 28, 2025, in connection with the solicitation of Pinnacle shareholder approval.

The transaction is structured as an all-cash reverse triangular merger under Delaware law. CRH Merger Sub Inc. (EIN: 91-2098433), a wholly owned, newly formed subsidiary of Cascade organized for the sole purpose of effectuating the merger, will merge with and into Pinnacle, with Pinnacle surviving the merger as a wholly owned subsidiary of Cascade. This structure preserves Pinnacle's existing contractual relationships, licenses, and corporate identity, which is important for maintaining continuity of the Pinnacle marketplace platform during the post-closing integration period.

The aggregate merger consideration is $4.7 billion, calculated as $26.85 per share of Pinnacle common stock multiplied by 175,047,319 shares outstanding as of the March 14, 2025 record date. The per-share consideration represents a premium of approximately 20.4% over Pinnacle's unaffected closing stock price of $22.30 per share on March 7, 2025, the last trading day prior to market rumors regarding a potential transaction. The premium level is generally consistent with recent comparable transactions in the technology and e-commerce space and reflects the strategic value of Pinnacle's seller base and platform technology to Cascade's marketplace expansion strategy.

Financing for the transaction is structured as follows:

• Cash on Hand: $1.9 billion from Cascade's existing balance sheet, reflecting the Company's strong cash generation and liquidity position.

• Term Loan B Facility: $2.8 billion senior secured Term Loan B facility from Whitmore National Bank, N.A., pursuant to a commitment letter dated March 12, 2025 (reference CRH-WNB-2025-TLB). Brian Alderman serves as the relationship manager at Whitmore National Bank for this facility.

• Revolving Credit Facility: $500 million revolving credit facility, not expected to be drawn at closing but available for working capital and general corporate purposes.

The Merger Agreement contains the following key termination provisions relevant to the regulatory challenge:

• Reverse Termination Fee (Regulatory Failure): $282 million (approximately 6% of total deal value), payable by Cascade to Pinnacle in the event the transaction fails to close due to an inability to obtain required antitrust clearance or as a result of an injunction or other order prohibiting the consummation of the merger.

• Company Termination Fee (Superior Proposal): $164.5 million (approximately 3.5% of total deal value), payable by Pinnacle to Cascade in the event the Merger Agreement is terminated in connection with Pinnacle's acceptance of a superior acquisition proposal.

• Outside Date: March 14, 2026 (12 months from the date of execution of the Merger Agreement), with an automatic three-month extension to June 14, 2026, if the sole remaining unsatisfied closing condition as of the original outside date is the receipt of antitrust clearance or the absence of a government injunction blocking the merger.

The transaction's financial advisors include Mercer Hollis & Co. (serving as Cascade's financial advisor, with Graham Mercer IV serving as Managing Director on the engagement) and Ridgeline Capital Partners (serving as Pinnacle's financial advisor, with Nadine Vasquez serving as Managing Director). Transaction counsel for the merger—separate from the antitrust litigation engagement—is Harmon Ridgeway & Strauss LLP, with Phillip Strauss serving as Lead M&A Partner and Monica Chen-Barrios serving as Senior Associate on the deal.

C. Regulatory Timeline

The following summarizes the key dates in the regulatory review process leading to the current litigation:

• April 2, 2025: Cascade and Pinnacle filed their respective Hart-Scott-Rodino ("HSR") Premerger Notification and Report Forms with the FTC and the Department of Justice Antitrust Division (Transaction No. HSR-20250402-0347). The initial 30-day waiting period commenced upon filing.

• May 7, 2025: The FTC issued a Second Request for Additional Information and Documentary Material (File No. 251-0089) to both Cascade and Pinnacle prior to the expiration of the initial waiting period, thereby extending the statutory waiting period until 30 days after substantial compliance with the Second Request. The Second Request was comprehensive, encompassing approximately 35 categories of documents and data relating to the parties' marketplace operations, competitive positioning, pricing, seller relationships, and strategic planning.

• June 10, 2025: Cascade and Pinnacle each certified substantial compliance with the Second Request, commencing the final 30-day waiting period.

• June 20, 2025: The FTC issued its administrative complaint (Docket No. 9438), alleging that the proposed acquisition would substantially lessen competition in violation of Section 7 of the Clayton Act, 15 U.S.C. § 18, and Section 5 of the Federal Trade Commission Act, 15 U.S.C. § 45. The complaint was authorized by a 3–2 vote of the Commission.

• June 23, 2025: The FTC filed its complaint in the United States District Court for the Western District of Washington seeking a temporary restraining order and preliminary injunction under Section 13(b) of the FTC Act, 15 U.S.C. § 53(b). The case was assigned to the Honorable Richard A. Johannsen and designated Case No. 2:25-cv-01087-RAJ.

• June 25, 2025: Calderwood & Harkness LLP was engaged by Cascade as lead defense counsel for the antitrust litigation.

• June 30, 2025: Calderwood & Harkness formally opened the matter (Matter No. 1038-00001).

The timeline from the HSR filing to the FTC's complaint—approximately 79 days—reflects the Commission's aggressive posture in this matter. The decision to file the administrative complaint only 10 days after the parties certified substantial compliance with the Second Request, and without engaging in meaningful pre-complaint settlement negotiations, suggests that the Commission staff had formed preliminary conclusions about competitive harm early in the review process, likely informed by third-party complaints from marketplace sellers and competing platforms.

III. Analysis of the FTC's Complaint

A. The FTC's Alleged Relevant Market

The market definition adopted by the FTC is the foundation upon which the Commission's entire competitive harm theory rests, and it is also the most aggressive analytical choice in the complaint. The FTC defines the relevant product market as "online marketplace platform services for third-party sellers in the United States." Complaint ¶¶ 28–36. The FTC further defines the relevant geographic market as the United States. Complaint ¶ 37.

This product market definition is deliberately narrow in several critical respects. It excludes:

1. Direct-to-consumer ("DTC") e-commerce retail — including, notably, Cascade's own CascadeDirect.com platform, as well as the DTC operations of major competitors such as Vertex Commerce's proprietary retail operations, traditional retailers' e-commerce channels (e.g., Walmart.com, Adriatic Corporation), and the vast universe of independent DTC websites built on platforms such as Dunmore Services Inc., Granite Harbor Services Inc., and Bramwell Health IT.

2. Social commerce platforms — platforms such as Brevity Social Commerce Inc. (launched 2023) and emerging competitors that integrate marketplace-like selling functionality with social media and content creation, enabling sellers to reach consumers through non-traditional channels.

3. Hybrid retail models — retailers that combine elements of proprietary retail and third-party marketplace functionality, blurring the line between "marketplace" and "retail" in ways that the FTC's product market definition cannot coherently accommodate.

4. Brick-and-mortar retail with an online presence — traditional retailers that compete for the same consumer spending through physical storefronts supplemented by online ordering, click-and-collect, and other omnichannel strategies.

The FTC's geographic market definition—the United States as a whole—is less controversial and likely correct for purposes of this proceeding. Online marketplace platforms operate on a national basis, and neither sellers nor consumers face meaningful geographic restrictions on their ability to participate in marketplace transactions. We do not anticipate challenging the geographic market definition.

Assessment. The product market definition is the FTC's most significant vulnerability and our most promising line of attack. The FTC needs this narrow market definition to generate the alarming concentration statistics that trigger the structural presumption under United States v. Philadelphia National Bank, 374 U.S. 321, 363 (1963), and its progeny. In a broader market encompassing "all e-commerce retail" or even "all online retail platforms," the combined entity's share of total U.S. e-commerce GMV would be approximately 7.3% (combined e-commerce and marketplace GMV of approximately $55.1 billion out of $757 billion in total U.S. e-commerce GMV in 2024), which falls far below any concentration threshold that would support a presumption of competitive harm. Even measuring only marketplace GMV against total e-commerce GMV, the combined entity's share would be approximately 1.9% ($14.5 billion combined marketplace GMV out of $757 billion total).

The key analytical question for Dr. Ramanathan's expert report is whether a hypothetical monopolist of "online marketplace platform services" could profitably impose a small but significant and non-transitory increase in price ("SSNIP")—in this context, an increase in take rates charged to third-party sellers—without losing sufficient seller volume to other retail channels to render the increase unprofitable. If sellers would respond to a take rate increase by shifting volume to DTC channels, social commerce platforms, or other distribution methods, the relevant market must be broadened to include those alternatives. We believe the evidence will strongly support this conclusion, particularly given the multi-homing behavior of sellers who already operate across multiple platforms simultaneously.

B. Market Share Allegations and HHI Analysis

The FTC's complaint contains detailed market share allegations and HHI calculations premised on the narrow "online marketplace platform services" market definition. According to the Complaint at ¶ 42, the FTC calculates the following market shares based on GMV within its alleged relevant market:

Based on these market share figures, the FTC presents the following HHI analysis at Complaint ¶ 47:

• Pre-merger HHI: 2,361

• Post-merger HHI: 2,856

• Delta (change in HHI): 495

The HHI delta is computed using the standard formula of 2 × S₁ × S₂, where S₁ and S₂ represent the market shares of the merging firms: 2 × 8.2 × 30.1 = 493.64, which the FTC rounds to 495.

Under the 2023 Merger Guidelines (and consistent with the framework established in the 2010 Horizontal Merger Guidelines), a market with a post-merger HHI above 2,500 is considered "highly concentrated," and a merger producing an HHI increase of more than 200 points in a highly concentrated market is presumed likely to enhance market power. The FTC's figures clear both thresholds: the post-merger HHI of 2,856 exceeds the 2,500 threshold, and the delta of 495 far exceeds the 200-point threshold. If the court accepts these figures at face value, the merger triggers a strong structural presumption of anticompetitive effect under Philadelphia National Bank and United States v. Tarvick Hughes Inc., 908 F.2d 981 (D.C. Cir. 1990).

Assessment. These concentration numbers are concerning if the court accepts the FTC's market definition, and they will be the primary basis on which the FTC argues that the burden should shift to the defendants to rebut the structural presumption. However, the HHI analysis is only as reliable as the market definition upon which it is constructed. If we can establish a broader relevant market—whether "all e-commerce retail," "all online retail platforms," or any definition broader than the FTC's—the HHI analysis becomes fundamentally unreliable and the structural presumption evaporates.

Even within the FTC's own narrow market, the competitive landscape presents complexities that cut in our favor. The combined entity at 38.3% would barely exceed Vertex Commerce at 35.7%, resulting in a market structure dominated by two firms of roughly equal size, followed by a third competitor (Nomad Shops at 14.6%) of meaningful but lesser scale, and a competitive fringe comprising newer entrants and smaller platforms. This two-firm quasi-duopoly structure cuts both ways analytically. The FTC can point to it as evidence of coordinated effects risk—arguing that two dominant firms may find it easier to tacitly coordinate on take rates and seller terms. But we can equally argue that the structure ensures robust head-to-head competition between the combined entity and Vertex Commerce, a well-financed, sophisticated competitor that would discipline any attempt by the merged firm to raise take rates or reduce seller services unilaterally. The presence of Vertex Commerce as a near-equal competitor substantially undermines the FTC's unilateral effects theory.

C. Theory of Harm

The FTC's complaint alleges that the proposed merger would cause competitive harm through the following mechanisms:

1. Elimination of a significant competitor. The merger would combine two of the four significant online marketplace platforms in the United States, reducing the number of major competitors from four to three. Complaint ¶¶ 48–52.

2. Loss of head-to-head competition. The merger would eliminate direct competition between CascadeMarket and Pinnacle for third-party sellers and, to a lesser extent, for consumer traffic. The FTC contends that both platforms actively compete for the same seller base and that the elimination of this rivalry would remove a significant competitive constraint. Complaint ¶¶ 53–59.

3. Seller-side harm through increased take rates and reduced services. The FTC alleges that the merged firm would have undue leverage over third-party sellers, enabling it to increase take rates, reduce seller-facing services and support, and diminish innovation in marketplace tools and seller analytics. Complaint ¶¶ 60–68. This is the FTC's primary theory of harm and reflects the Commission's increasing focus on input-side competition (i.e., competition for the services of suppliers or, in this case, third-party sellers) in addition to traditional consumer-side harm.

4. Trend toward concentration. The FTC argues that the online marketplace sector is experiencing a "trend toward concentration" and that the proposed merger would accelerate this trend, reducing competitive dynamism and raising barriers to entry for future marketplace platforms. Complaint ¶¶ 69–73.

The complaint's analytical framework indicates that the FTC is pursuing primarily a unilateral effects theory—i.e., the merger would enable the combined entity to exercise market power unilaterally by raising take rates on captive sellers—with a secondary coordinated effects theory suggesting that the reduction from four to three significant marketplace platforms would facilitate tacit or explicit coordination on pricing and seller terms.

Assessment. The unilateral effects theory is the FTC's strongest argument, but it is significantly undermined by seller multi-homing behavior. Multi-homing refers to the well-documented practice of third-party sellers operating across multiple marketplace platforms simultaneously—for example, listing the same products on CascadeMarket, Pinnacle, Vertex Commerce, and Nomad Shops, as well as maintaining independent DTC websites. If a substantial percentage of sellers actively multi-home, a post-merger take rate increase by the combined entity would prompt sellers to shift volume to competing platforms, making the increase unprofitable. Our preliminary review of Cascade's internal data suggests that multi-homing rates among CascadeMarket sellers are substantial, and we expect Dr. Ramanathan to develop this analysis in her expert report.

The "trend toward concentration" narrative is largely a policy argument rather than a legal one. While Section 7 of the Clayton Act was enacted to arrest trends toward concentration in their incipiency, Brown Shoe Co. v. United States, 370 U.S. 294, 317 (1962), the "trend" argument carries limited independent legal weight under modern Section 7 analysis. The FTC's invocation of this theme is more likely directed at Judge Johannsen's policy sensibilities than at the doctrinal framework. That said, the argument may resonate with certain judges, and we should be prepared to address it directly rather than dismiss it.

The coordinated effects theory is weaker. Three-to-two mergers in markets with differentiated products and non-transparent pricing are poor candidates for coordinated effects analysis. Marketplace take rates, seller terms, promotional programs, and platform features are not readily observable across competitors, making tacit coordination difficult to sustain. We should be prepared to argue that the conditions necessary for coordinated interaction—transparent pricing, market concentration among homogeneous competitors, mechanisms for detecting and punishing deviation—are not present in the online marketplace context.

D. Significance of the 3–2 Commission Vote

The Commission authorized the filing of the administrative complaint and the district court action by a vote of 3–2. This fact is significant for several reasons and should be integrated into our defense narrative.

First, the close vote signals genuine internal division on the merits within the Commission itself. The FTC is composed of five commissioners with substantial expertise in antitrust law and economics, and the fact that two of the five commissioners voted against bringing the challenge indicates that reasonable and informed decision-makers concluded that the case was either insufficiently supported by the evidence or represented an inappropriate exercise of enforcement discretion. This is not a case where the full Commission unanimously determined that the merger posed a clear threat to competition.

Second, the two dissenting commissioners likely concluded that the FTC's case was marginal—either because they disagreed with the narrow market definition, because they found the evidence of competitive harm insufficient, or because they believed the merger's procompetitive efficiencies outweighed any potential anticompetitive effects. The dissenting views, if publicly available, may provide useful arguments and analytical frameworks that mirror our own defense theories.

Third, while courts generally do not accord significant weight to internal agency deliberations in evaluating the merits of a government enforcement action, the close vote is useful for contextualizing the strength of the FTC's case. In the context of a Section 13(b) preliminary injunction proceeding, where the court must assess whether the FTC has "reason to believe" the merger violates Section 7, the fact that the Commission's own assessment was closely divided undermines any suggestion that the competitive harm is clear or undisputed.

Fourth, we should attempt to obtain any publicly available statements from the dissenting commissioners, which are sometimes issued contemporaneously with the announcement of a Commission enforcement action. If the dissenting commissioners published written statements, those statements may contain substantive criticisms of the market definition, the competitive effects analysis, or the sufficiency of the evidence that we can incorporate into our briefing and argument.

Caveat. Courts have generally held that internal agency deliberations, including Commission voting patterns, are not probative of the merits of the legal claims at issue. See, e.g., FTC v. Pemberton Corporation, 969 F.3d 974 (9th Cir. 2020) (evaluating FTC claims on the merits without reference to internal Commission dynamics). We should be careful not to overstate the significance of the 3–2 vote, but it remains a useful data point in framing the overall strength of the FTC's case.

IV. Preliminary Injunction Legal Standard Under Section 13(b)

A. Governing Framework

The FTC seeks a preliminary injunction under Section 13(b) of the Federal Trade Commission Act, 15 U.S.C. § 53(b), which authorizes the Commission to seek temporary restraining orders and preliminary injunctions in federal district court "[w]henever the Commission has reason to believe" that a merger or acquisition would violate Section 7 of the Clayton Act. The statute provides that the court "shall" grant such injunctive relief "upon a proper showing that, weighing the equities and considering the Commission's likelihood of ultimate success, such action would be in the public interest."

This statutory standard is materially different from—and more favorable to the government than—the traditional four-factor preliminary injunction test applied in private litigation. Under the traditional framework, a movant must establish: (1) a likelihood of success on the merits, (2) a likelihood of irreparable harm absent injunctive relief, (3) a balance of equities tipping in the movant's favor, and (4) that the injunction would serve the public interest. Winter v. Natural Resources Defense Council, Inc., 555 U.S. 7, 20 (2008). By contrast, Section 13(b) requires only that the FTC demonstrate: (1) it has "reason to believe" the merger violates Section 7, and (2) a preliminary injunction would be in the "public interest," with the court weighing the equities and considering the Commission's likelihood of ultimate success.

The practical effect of this lower standard is that the FTC need not demonstrate irreparable harm or a balance of equities tipping in its favor as independent prerequisites. Instead, the court conducts a holistic assessment focused on the public interest, giving significant weight to the FTC's likelihood of prevailing on the merits in the administrative proceeding.

Key Precedent. The leading precedent on the Section 13(b) standard is FTC v. H.J. Heinz Co., 246 F.3d 708 (D.C. Cir. 2001), in which the D.C. Circuit applied a "likelihood of success on the merits" analysis within the Section 13(b) framework, holding that the FTC was entitled to a preliminary injunction where it demonstrated that the merger would likely violate Section 7. The court held that the FTC could establish a prima facie case of competitive harm through the structural presumption arising from high market concentration, and that the burden then shifted to the defendants to rebut the presumption with evidence of efficiencies, ease of entry, or other procompetitive factors. See also FTC v. Sysco Corp., 113 F. Supp. 3d 1 (D.D.C. 2015) (granting preliminary injunction where FTC established market definition and competitive harm through expert testimony and documentary evidence); FTC v. Staples, Inc., 190 F. Supp. 3d 100 (D.D.C. 2016) (granting injunction in office supply merger where FTC demonstrated narrow but cognizable market); FTC v. Penn State Hershey Medical Center, 838 F.3d 327 (3d Cir. 2016) (reversing district court's denial of preliminary injunction where FTC established relevant geographic market).

Importantly, while courts typically afford the FTC a degree of deference in Section 13(b) proceedings, the FTC cannot rest on bare allegations or conclusory assertions of competitive harm. The Commission must present evidence—including economic expert testimony, documentary evidence, and fact witness testimony—sufficient to support its market definition and competitive effects theories. The Section 13(b) hearing is an evidentiary proceeding, and the court must make factual findings based on the record presented. See FTC v. RAG-Stiftung, 436 F. Supp. 3d 278 (D.D.C. 2020) (denying preliminary injunction where FTC failed to establish narrow market definition).

We note that the Western District of Washington has limited precedent on the Section 13(b) standard in merger cases. Judge Johannsen has not previously presided over an FTC merger challenge, which introduces additional uncertainty about how he will apply the standard and how much deference he will afford to the Commission's analytical framework.

B. Assessment of FTC's Likelihood of Success

The FTC's likelihood of success on the merits—and thus its likelihood of obtaining a preliminary injunction—turns almost entirely on the market definition question. The case follows a predictable analytical sequence: if the court accepts the FTC's narrow "online marketplace platform services" market, the structural presumption from the HHI analysis is strong (post-merger HHI of 2,856, delta of 495, both well above the guidelines thresholds), and the burden shifts to the defendants to rebut the presumption with evidence of countervailing competitive factors. If the court rejects or broadens the market definition, the HHI analysis produces numbers well below any threshold of concern, and the FTC's case effectively fails.

Within the FTC's narrow market, the structural presumption is formidable. The combined 38.3% market share is well above the 30% threshold that courts have generally found sufficient to trigger the presumption. See Philadelphia National Bank, 374 U.S. at 363 (combined share of 30% "threatens undue concentration"). Rebutting the structural presumption requires the defendants to present evidence that the market share statistics overstate the merger's likely competitive effects—through evidence of ease of entry, repositioning by existing competitors, efficiencies, or the declining competitive significance of the acquired firm. As discussed in Section V below, we have strong arguments on several of these rebuttal theories, but the burden of rebutting a strong structural presumption is substantial.

To defeat the market definition, we must show that the FTC's SSNIP test—applied to the marketplace platform services market—is methodologically flawed because it fails to account for the competitive constraints imposed by DTC e-commerce, social commerce, and other retail channels on marketplace take rates and seller terms. This is fundamentally an economic question that will be decided on the basis of expert testimony, and the strength of Dr. Ramanathan's analysis relative to Dr. Keenan's analysis will likely be dispositive.

Estimated Likelihood of FTC Success in Obtaining PI: 35–45%. This range reflects the following assessment:

• There is approximately a 50–55% chance that the court will accept or substantially adopt the FTC's narrow market definition. While we believe the broader market is the correct analytical framework, the FTC's definition is not frivolous, and it aligns with the Commission's recent enforcement approach in platform markets.

• If the court accepts the narrow market, there is approximately a 65–75% chance that the FTC will satisfy the PI standard, as the structural presumption will be strong and the burden on defendants heavy.

• If the court rejects the narrow market and adopts a broader definition, there is less than a 10% chance that the FTC will satisfy the PI standard.

• Blending these conditional probabilities yields an overall estimate of approximately 35–45%.

This estimate will be refined as discovery progresses and we gain a clearer picture of the documentary evidence and the strength of the competing expert analyses.

C. Equities Analysis

While the equities are not an independent prerequisite for a Section 13(b) injunction, the statute instructs the court to "weigh the equities" in determining whether an injunction would serve the public interest. The equitable considerations in this case favor Cascade.

First, the reverse termination fee of $282 million represents a concrete, quantifiable financial harm to Cascade if the merger fails due to a regulatory challenge. This is not a speculative or contingent harm; it is a contractual obligation that will be triggered if the transaction cannot close. Courts have recognized that the financial consequences of merger failure—including termination fees, financing costs, and management distraction—are relevant equitable considerations in Section 13(b) proceedings.

Second, the outside date structure creates significant time pressure. The Merger Agreement's outside date of March 14, 2026, with a limited three-month extension to June 14, 2026 available only if the sole unsatisfied condition is antitrust clearance, means that a prolonged injunction could effectively kill the transaction even without a final adjudication on the merits. If the preliminary injunction is granted in October or November 2025, and the subsequent administrative proceeding takes 6–12 months to complete, the outside date will expire before a final Commission decision is rendered, requiring the parties to either extend the outside date (potentially requiring renegotiation of the merger terms) or abandon the transaction.

Third, Pinnacle's competitive deterioration—discussed in Section V.A.4—makes delay independently harmful to both parties. Each month that the transaction remains pending is a month during which Pinnacle's competitive position continues to weaken, its seller base continues to erode, and the potential synergies from the combination diminish. The FTC's challenge thus has the perverse effect of exacerbating the very competitive harm it purports to prevent—by delaying the transaction, the FTC is allowing Pinnacle's marketplace to deteriorate further, which will ultimately harm the sellers and consumers the FTC claims to protect.

The FTC will counter that the public interest in preventing an anticompetitive merger outweighs private financial harm, and that the equities in Section 13(b) cases inherently favor the government because the public interest in competitive markets is paramount. Courts have generally agreed that private equitable considerations, standing alone, cannot defeat a preliminary injunction when the FTC makes a strong showing on the merits. See H.J. Heinz, 246 F.3d at 726 (holding that "the public equity considerations in an FTC Section 13(b) proceeding will often be the dispositive factor in the court's analysis").

Assessment. The equities alone are unlikely to carry the day if the FTC makes a strong showing on the merits. However, they provide useful leverage, particularly in the event of a close case where the court's assessment of the FTC's likelihood of success is uncertain. The outside date pressure, in particular, may incentivize Judge Johannsen to resolve the PI motion expeditiously rather than allowing the proceedings to drag on, which in itself could be advantageous for the defense.

V. Recommended Defense Strategy

A. Primary Defense Pillars

1. Market Definition Challenge

The market definition challenge is the most critical element of our defense. If we prevail on market definition, the FTC's case collapses. If we lose on market definition, we face an uphill battle on rebuttal.

Central Argument. The relevant product market should be defined as "all e-commerce retail" or, at minimum, "all online retail platforms"—not limited to the artificially narrow category of "online marketplace platform services for third-party sellers." The FTC's market definition imposes an analytically unjustifiable distinction between marketplace platform services and other forms of online retail competition that, from both the demand side and the supply side, impose meaningful competitive constraints on marketplace platforms.

Demand-Side Substitution. From the perspective of consumers, marketplace purchases and direct retail purchases are functionally interchangeable. A consumer seeking to purchase a set of kitchen knives can choose to buy from a third-party seller on Pinnacle, from a third-party seller on CascadeMarket, from Cascade's own CascadeDirect.com store, from Vertex Commerce's proprietary retail channel, from a direct-to-consumer website operated by the knife manufacturer, from a social commerce listing on Brevity Social Commerce, or from a brick-and-mortar retailer's website. The consumer does not distinguish between these channels based on the underlying economic relationship between the platform and the seller; the consumer cares about price, selection, convenience, and delivery speed. This broad pattern of demand-side substitution means that a hypothetical monopolist of "marketplace platform services" could not profitably raise take rates (which would be passed through to consumers as higher prices) without losing substantial consumer volume to non-marketplace retail channels.

Supply-Side Substitution. From the perspective of third-party sellers, the ability to shift sales volume across multiple channels—marketplace platforms, DTC websites, social commerce, wholesale distribution—provides a competitive constraint on any individual marketplace platform's take rate and terms of service. Sellers who currently use CascadeMarket and Pinnacle also operate on Vertex Commerce, Nomad Shops, and independent websites built on Dunmore Services Inc. and similar platforms. Multi-homing is pervasive, and the marginal cost of shifting volume from one channel to another is low. If the combined Cascade/Pinnacle entity attempted to raise take rates, sellers would respond by directing incremental volume to competing channels, rendering the increase unprofitable.

Cross-Platform Competition from Emerging Channels. The competitive landscape is evolving rapidly. Social commerce platforms—led by Brevity Social Commerce Inc. (launched in 2023, headquartered in Los Angeles, California) and Trove Marketplace Inc. (launched in 2024, headquartered in Chicago, Illinois)—represent a rapidly growing competitive force that blurs the line between marketplace selling, social media marketing, and direct-to-consumer retail. These platforms enable sellers to reach consumers through content-driven discovery rather than traditional search-based marketplace browsing, and they are attracting significant seller adoption. The FTC's narrow market definition fails to account for these emerging competitive constraints.

Quantitative Support. In a broader "all e-commerce retail" market, the combined entity's share of total U.S. e-commerce GMV is approximately 7.3% (combined e-commerce and marketplace GMV of approximately $55.1 billion out of $757 billion in total U.S. e-commerce GMV in 2024). Even measuring only marketplace GMV against total e-commerce GMV, the combined entity's share is approximately 1.9%. These figures are far below any concentration threshold that would support a presumption of competitive harm and would result in a post-merger HHI well below 1,500 (unconcentrated under the Merger Guidelines).

Expert Testimony. This argument will require robust economic expert testimony from Dr. Priya Ramanathan of Brindoval Analytics LLC. Dr. Ramanathan's report should present a SSNIP analysis demonstrating that the FTC's narrow market fails the hypothetical monopolist test, supported by seller switching data, multi-homing analysis, cross-elasticity estimates, and econometric modeling of seller response to take rate changes. The strength of Dr. Ramanathan's analysis relative to the FTC's expert, Dr. Wallace Keenan of Thornfield Research Group, will likely be determinative.

Two-Sided Platform Analysis. We should reference the analytical framework established in Ohio v. Halcyon Corporation, 585 U.S. 529 (2018), which held that market definition in two-sided platform contexts must account for the interdependent demand on both sides of the platform. Online marketplaces are classic two-sided platforms: they serve both sellers (who pay take rates for access to consumers) and consumers (who receive access to a broad selection of products). Any market definition analysis that considers only the seller side of the platform without accounting for the interdependent consumer side is incomplete and potentially misleading. While the applicability of Amex to merger analysis remains debated, the decision provides useful support for the proposition that narrow, single-sided market definitions in platform contexts are analytically suspect.

2. Procompetitive Efficiencies

Even if the court accepts the FTC's market definition and finds that the structural presumption is established, Cascade can rebut the presumption by demonstrating that the merger will generate substantial, verifiable, merger-specific efficiencies that benefit consumers and sellers. The Horizontal Merger Guidelines recognize cognizable efficiencies as a legitimate defense to a challenge based on structural market concentration, provided the efficiencies are (1) merger-specific (i.e., not achievable through less anticompetitive means), (2) verifiable (i.e., supported by credible evidence rather than speculative projections), and (3) sufficient in magnitude to reverse the merger's potential to harm competition.

Cascade projects merger-specific efficiencies of approximately $340 million annually by Year 3 post-closing, consisting of two principal components:

Logistics and Fulfillment Cost Savings ($195 Million). Cascade's existing 22-warehouse fulfillment network, which currently supports CascadeDirect.com and CascadeMarket, has significant excess capacity that can be utilized to fulfill orders from Pinnacle's seller base. By integrating Pinnacle's approximately 185,000 sellers into Cascade's fulfillment infrastructure, the combined entity can achieve substantial cost savings through reduced shipping costs, consolidated warehouse operations, and improved delivery times. These savings are merger-specific because Pinnacle does not operate its own fulfillment network of comparable scale and could not independently replicate Cascade's logistics capabilities without a capital investment of approximately $800 million to $1.2 billion over 3–5 years—an investment that Pinnacle's current financial trajectory does not support.

Technology and Platform Synergies ($145 Million). The integration of Pinnacle's marketplace technology stack into Cascade's platform infrastructure will eliminate duplicative technology costs including redundant server infrastructure, overlapping engineering teams, and parallel development efforts. In addition, the combined entity will be able to deploy Cascade's more advanced seller analytics tools, advertising technology, and consumer recommendation algorithms across the Pinnacle seller base, improving seller performance and consumer experience. These technology synergies are merger-specific because they require the full integration of the two platforms' data, algorithms, and engineering resources—an outcome achievable only through the combination.

Pass-Through to Consumers and Sellers. To be cognizable under the Merger Guidelines, efficiencies must be likely to be passed through to consumers (and, in this case, to third-party sellers). Cascade has committed, in its integration planning documents, to pass through a portion of the efficiency gains in the form of reduced take rates for sellers, improved fulfillment services (including faster shipping and lower fulfillment fees), and enhanced platform tools. The competitive pressure from Vertex Commerce, Nomad Shops, and emerging platforms provides a structural incentive for the combined entity to pass efficiency gains through to sellers and consumers rather than retain them as excess profits.

Key Fact Witness. Patricia "Trish" Delacroix, SVP of Marketplace & Platform Strategy, is the key fact witness for integration planning and efficiency projections. Ms. Delacroix led the internal team that developed the integration plan and the efficiency estimates, and her testimony will be critical to establishing the verifiability and merger-specificity of the projected savings. We should begin deposition preparation with Ms. Delacroix promptly.

Risk Assessment. Courts have historically been skeptical of efficiencies defenses, viewing projected cost savings as inherently speculative and difficult to verify. See, e.g., FTC v. H.J. Heinz, 246 F.3d at 720 (noting that "the court must undertake a rigorous analysis of the kinds of efficiencies being urged by the parties in order to ensure that those 'ichthyological efficiency claims' are not merely 'speculative, self-serving, [and] could not be verified'"). The $340 million annual savings figure is substantial, but we must be prepared to defend every element of the projection with detailed documentation, third-party validation, and credible expert analysis. The FTC will attack the efficiencies as overstated, speculative, and not merger-specific, arguing that Cascade could achieve many of the same savings through organic expansion of CascadeMarket or through a less anticompetitive transaction.

3. Ease of Entry and Expansion

The ease with which new competitors can enter the online marketplace market—and with which existing competitors can expand—is a critical factor in assessing the merger's competitive effects. If entry and expansion are relatively easy, the merged entity's ability to exercise market power will be constrained by the threat of new competition, even in a concentrated market.

The evidence of recent entry into the marketplace space is compelling. Brevity Social Commerce Inc. launched in 2023 and has rapidly gained seller and consumer traction by combining marketplace functionality with social media content creation and influencer-driven product discovery. Based in Los Angeles, California, Brevity represents a new model of marketplace competition that the FTC's complaint largely ignores. Trove Marketplace Inc. launched in 2024 in Chicago, Illinois, with a focus on curated, premium consumer products and a commitment to lower seller take rates as a competitive differentiator. Both entrants demonstrate that the barriers to launching a new online marketplace platform are not prohibitive, and that innovative business models can attract sellers and consumers even in a market with established incumbents.

Beyond new entrants, the expansion of social commerce platforms more broadly—including features offered by major social media platforms that increasingly integrate shopping functionality—represents a rapidly growing competitive constraint on traditional marketplace platforms. Sellers can now reach consumers directly through social media storefronts, livestream shopping events, and content-driven product placements, all of which compete for the same seller attention and consumer spending that traditional marketplaces serve.

Additionally, DTC aggregation models—platforms that help sellers build and manage independent online stores—provide an alternative channel for sellers who wish to reduce their dependence on marketplace platforms. The availability of these alternatives ensures that sellers are not captive to any single marketplace, even post-merger.

Finally, within the FTC's own narrow market, Vertex Commerce at 35.7% market share provides a dominant alternative for sellers. Vertex Commerce is a well-resourced, technologically sophisticated competitor that has been investing heavily in seller services, fulfillment capabilities, and platform features. Its continued presence ensures vigorous competition regardless of the merger outcome.

4. Weakening Competitor / Pinnacle's Competitive Trajectory

The FTC's market share figures are a snapshot of Pinnacle's current position, but they obscure a critical dynamic reality: Pinnacle's competitive position has been deteriorating significantly over the past two years, and its trajectory suggests further decline absent the merger.

The key metrics demonstrating Pinnacle's competitive deterioration are:

• GMV Growth Rate Deceleration: Pinnacle's year-over-year GMV growth has slowed sharply from 28% in 2022 to 18% in 2023 to just 9% in 2024. This deceleration reflects increasing competitive pressure from Vertex Commerce, CascadeMarket, and new entrants, as well as saturation in Pinnacle's core product categories (home goods and artisanal products).

• Seller Churn Rate Increase: The rate at which sellers leave the Pinnacle platform has risen from 12% in 2022 to 21% in 2024, reflecting seller dissatisfaction with Pinnacle's platform tools, fulfillment services, and competitive positioning relative to alternatives. This nearly doubled churn rate is a leading indicator of continued competitive decline.

These trends suggest that Pinnacle's 30.1% market share—the largest component of the FTC's concentration analysis—significantly overstates Pinnacle's actual competitive significance on a forward-looking basis. A firm that is losing sellers at an accelerating rate and experiencing rapidly decelerating growth is not the vigorous, independent competitor that the FTC's static market share figures imply.

We acknowledge that Pinnacle likely does not meet the strict requirements of the "failing firm" defense recognized in the Merger Guidelines and case law. The failing firm defense requires a showing that (1) the acquired firm is in imminent danger of business failure, (2) the firm is unable to reorganize successfully under Chapter 11 of the Bankruptcy Code, and (3) there is no alternative purchaser whose acquisition would pose fewer competitive concerns. Pinnacle is not imminently failing—it remains profitable, has positive cash flow, and has not explored bankruptcy. The failing firm defense is therefore inapplicable in the strict sense.

However, the "weakening competitor" argument occupies distinct analytical ground. Courts have recognized that a firm's declining competitive position is a relevant factor in assessing the likely competitive effects of a merger, even if the firm does not meet the failing firm test. See United States v. Fenmore Industries, 415 U.S. 486, 503–04 (1974) (holding that the acquired firm's declining market position and depletion of reserves rendered its static market share figures unreliable as predictors of future competitive significance); FTC v. National Tea Co., 603 F.2d 694 (8th Cir. 1979) (considering weakening competitor evidence in evaluating merger's competitive effects). Under this line of authority, Pinnacle's declining trajectory materially diminishes the anticompetitive potential of the acquisition because the merger eliminates less competition than the FTC's static market share figures suggest.

Key Witnesses. The weakening competitor argument depends heavily on testimony from Pinnacle's executives—particularly Rajiv Chandravar (CEO) and Thomas Breck (CFO)—who can speak to the competitive challenges facing the company, the reasons for seller churn, the deceleration in growth, and the strategic rationale for agreeing to the sale. This testimony must be developed in coordination with Whitfield, Greer & Tanaka LLP, who represent Pinnacle and will take the lead on preparing Pinnacle's witnesses.

B. Daubert Motion Strategy

We should seriously consider filing a motion under Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993), and Federal Rule of Evidence 702, to exclude or limit the expert testimony of Dr. Wallace Keenan of Thornfield Research Group, the FTC's designated testifying expert on market definition and competitive effects.

Potential Grounds for the Motion. Based on our preliminary review of the FTC's complaint (which recites Dr. Keenan's conclusions but does not fully disclose his methodology), we anticipate the following potential bases for a Daubert challenge:

• Flawed SSNIP Test Methodology. If Dr. Keenan's market definition analysis applies the SSNIP test solely to the seller side of the marketplace platform—i.e., evaluating whether a hypothetical monopolist of marketplace services could profitably raise take rates on sellers—without accounting for the interdependent demand on the consumer side or the supply-side substitution available to sellers through DTC and social commerce channels, his methodology is incomplete and unreliable. A properly conducted SSNIP test in a two-sided platform market must account for competitive constraints on both sides of the platform.

• Unreliable Seller-Side Diversion Ratios. The FTC's unilateral effects theory likely relies on diversion ratios—estimates of the share of seller volume lost by one merging party that would be captured by the other merging party in the event of a take rate increase. If Dr. Keenan's diversion ratios are based on survey data that fails to account for multi-homing, that uses leading or biased survey questions, or that artificially restricts the choice set available to sellers, the resulting estimates may be unreliable and inadmissible.

• HHI Calculations Based on Improperly Defined Market. While HHI calculations are straightforward arithmetic once market shares are established, the calculations are only meaningful if the underlying market definition is correct. If the court determines that the market definition is flawed, the HHI calculations derived from that market are inherently unreliable. A Daubert motion can frame this issue by arguing that Dr. Keenan's conclusions rest on an analytically deficient foundation.

Timing. Any Daubert motion must be filed well in advance of the September 8 preliminary injunction hearing. Based on the anticipated schedule, expert reports are due August 18, 2025, and the motion should be filed promptly thereafter—likely in the week of August 18–22—concurrent with or shortly after the exchange of expert reports. We should raise the issue at the July 14 case management conference to ensure that the court's scheduling order accommodates a Daubert briefing schedule.

Risk Assessment. Daubert motions in the context of antitrust preliminary injunction hearings are rarely fully successful. Courts in PI proceedings typically prefer to consider the competing expert testimony and assess its reliability as part of the overall weight of the evidence rather than excluding testimony altogether. However, even an unsuccessful Daubert motion can serve important strategic purposes: it signals to the court the specific methodological weaknesses in the FTC's economic ana

PRIVILEGED AND CONFIDENTIAL — ATTORNEY-CLIENT COMMUNICATION / ATTORNEY WORK PRODUCT This memorandum is protected from disclosure by the attorney-client privilege and the work product doctrine. It is intended solely for the use of the individuals to whom it is addressed and contains confidential legal analysis and strategic recommendations. Any dissemination, distribution, or copying of this memorandum or its contents is strictly prohibited. If you have received this memorandum in error, please notify the sender immediately and destroy all copies.
CALDERWOOD & HARKNESS LLP INTERNAL MEMORANDUM
Matter No.: 1038-00001
July 1, 2025
TO: Howard Bellamy, Responsible Partner, Antitrust & Competition Elaine Forsythe, Billing Partner, Antitrust & Competition
FROM: Elliot Nguyen, Lead Associate, Antitrust & Competition
RE: Case Assessment — FTC v. Cascade Retail Holdings Inc., Case No. 2:25-cv-01087-RAJ (W.D. Wash.); FTC Administrative Docket No. 9438
CC: Aaron Liu, Working Associate, Antitrust & Competition (Calderwood & Harkness LLP, San Francisco Office)
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I. Executive Summary
Calderwood & Harkness LLP was engaged on June 25, 2025, by Cascade Retail Holdings Inc. ("Cascade" or the "Company") to serve as lead defense counsel in the antitrust challenge brought by the Federal Trade Commission ("FTC" or the "Commission") to block Cascade's proposed $4.7 billion all-cash acquisition of Pinnacle Market Group Inc. ("Pinnacle"). The engagement follows the FTC's decision—authorized by a 3–2 Commission vote—to challenge the transaction under Section 7 of the Clayton Act, 15 U.S.C. § 18.
The FTC filed its administrative complaint (Docket No. 9438) on June 20, 2025, and simultaneously authorized staff to seek a preliminary injunction in federal court. The FTC's district court complaint was filed on June 23, 2025, in the United States District Court for the Western District of Washington, Case No. 2:25-cv-01087-RAJ, and the matter has been assigned to the Honorable Richard A. Johannsen. The Commission seeks a preliminary injunction under Section 13(b) of the FTC Act, 15 U.S.C. § 53(b), to consummation of the transaction pending the outcome of the FTC's administrative proceeding.
This memorandum provides an initial assessment of the FTC's complaint, evaluates the strength of the FTC's Section 7 theory, assesses the likelihood of the FTC obtaining a preliminary injunction under the Section 13(b) standard, identifies key documents and witnesses relevant to the defense, and recommends a comprehensive defense strategy framework for the preliminary injunction proceedings and beyond.
Preliminary Assessment. The FTC's case presents real but surmountable challenges. The Commission's reliance on a narrow product market definition—"online marketplace platform services for third-party sellers in the United States"—is the centerpiece of its competitive harm theory, but it is also the FTC's central vulnerability. By excluding direct-to-consumer e-commerce retail, social commerce platforms, and hybrid retail models, the FTC artificially inflates concentration levels and overstates the merger's competitive significance. We have strong arguments on efficiencies, as Cascade projects $340 million in annual merger-specific cost savings by Year 3, and on Pinnacle's weakening competitive position, which materially diminishes the anticompetitive potential of the transaction as measured by static market share data.
Our overall estimate of the likelihood of the FTC obtaining a preliminary injunction is approximately 35–45%. The range reflects meaningful uncertainty about how Judge Johannsen will treat the market definition question, which is the dispositive issue in the case. If the court accepts the FTC's narrow market, the structural presumption from the Herfindahl-Hirschman Index ("HHI") analysis is strong, and the burden will shift to the defendants to rebut the presumption with evidence of countervailing factors. If the court rejects or broadens the market definition, the FTC's case largely collapses. The 3–2 Commission vote further signals internal division on the merits and provides additional grounds for arguing that the FTC's theory is at the margins of antitrust enforcement.
Detailed memoranda on each defense pillar—market definition, competitive effects, efficiencies, weakening firm defense, the Section 13(b) legal standard, and a comprehensive case law survey—will follow in the coming weeks as discovery progresses and Dr. Priya Ramanathan's economic analysis takes shape.
II. Background and Transaction Overview
A. The Parties
1. Cascade Retail Holdings Inc.
Cascade Retail Holdings Inc. is a Delaware corporation headquartered at 2200 Westlake Avenue North, Suite 3400, Seattle, Washington 98109. The Company's shares are publicly traded on the Nasdaq Global Select Market under the ticker symbol "CSRT." As of June 27, 2025, Cascade's market capitalization was approximately $41.2 billion, making it one of the largest diversified retail companies in the United States.
Founded in 2003, Cascade operates a diversified retail business spanning three principal segments. First, the Company operates approximately 340 brick-and-mortar retail locations across 38 states, offering a broad assortment of consumer products including home goods, apparel, electronics, and general merchandise. Second, Cascade maintains a direct-to-consumer e-commerce platform, CascadeDirect.com, which serves as the Company's proprietary online retail channel. Third, and most relevant to this proceeding, Cascade operates a third-party seller marketplace known as "CascadeMarket," which was launched on June 1, 2019. CascadeMarket enables independent sellers to list and sell products to consumers through Cascade's platform in exchange for marketplace services including payment processing, customer service infrastructure, and optional fulfillment services.
For fiscal year 2024 (ending January 31, 2025), Cascade reported total consolidated revenue of $28.6 billion. The Company's e-commerce and marketplace segments generated combined revenue of approximately $9.3 billion. CascadeMarket alone generated gross merchandise volume ("GMV") of approximately $3.1 billion from approximately 42,000 active third-party sellers, yielding $527 million in marketplace services revenue at a 17% take rate. Cascade currently operates 22 fulfillment warehouses nationwide to support its e-commerce and marketplace logistics operations.
The following individuals hold key executive positions at Cascade and are expected to play significant roles in the litigation:
• Margaret "Meg" Thornberry — Chief Executive Officer & Chairwoman of the Board
• David Ruan — President & Chief Operating Officer
• Sonia Alvarez-Kirk — Chief Financial Officer
• Jerome Weston — General Counsel & Corporate Secretary
• Patricia "Trish" Delacroix — Senior Vice President, Marketplace & Platform Strategy
Mr. Weston will serve as the primary client contact for litigation purposes, though privilege considerations require careful management of communications given his dual role as General Counsel and potential fact witness regarding the transaction process and regulatory engagement.
2. Pinnacle Market Group Inc.
Pinnacle Market Group Inc. is a Delaware corporation headquartered at 500 East 6th Street, Suite 800, Austin, Texas 78701. Pinnacle's shares are publicly traded on the Nasdaq Global Select Market under the ticker symbol "PMGI." As of the last unaffected trading day prior to the merger announcement (March 7, 2025), Pinnacle's market capitalization was approximately $3.9 billion.
Pinnacle was founded in 2014 by Rajiv Chandravar and Lena Kowalski, who identified an opportunity to create a curated online marketplace platform connecting independent sellers with consumers across a range of product categories. The company initially focused on home goods and artisanal products but expanded over time into specialty foods, fashion, and consumer electronics. Pinnacle completed its initial public offering on September 18, 2020, and has since grown into one of the four largest online marketplace platforms in the United States.
As of fiscal year 2024 (ending December 31, 2024), Pinnacle hosted approximately 185,000 active third-party sellers on its platform. The company generated GMV of approximately $11.4 billion and reported net revenue of approximately $1.82 billion, reflecting a take rate of approximately 16%. Despite its strong market position and brand recognition, Pinnacle has experienced significant competitive headwinds in recent years, as discussed in greater detail in Section V.A.4 below.
Key executives at Pinnacle include:
• Rajiv Chandravar — Co-Founder & Chief Executive Officer
• Lena Kowalski — Co-Founder & Chief Product Officer
• Thomas Breck — Chief Financial Officer
• Anita Suresh — General Counsel
Pinnacle is separately represented in this litigation by Whitfield, Greer & Tanaka LLP, based in Austin, Texas. Diana Whitfield serves as Lead Partner, with Kenneth Oshiro serving as Senior Associate. As discussed in Section X below, we anticipate executing a Joint Defense and Common Interest Agreement with Whitfield, Greer & Tanaka on or about July 1, 2025, to facilitate coordination of the defense effort while preserving each party's independent counsel relationship.
B. Transaction Structure and Terms
Cascade and Pinnacle entered into an Agreement and Plan of Merger (the "Merger Agreement") on March 14, 2025. The transaction was publicly announced on March 17, 2025, and Cascade filed a Current Report on Form 8-K with the Securities and Exchange Commission on the same day. A Definitive Proxy Statement on Schedule 14A was subsequently filed on April 28, 2025, in connection with the solicitation of Pinnacle shareholder approval.
The transaction is structured as an all-cash reverse triangular merger under Delaware law. CRH Merger Sub Inc. (EIN: 91-2098433), a wholly owned, newly formed subsidiary of Cascade organized for the sole purpose of effectuating the merger, will merge with and into Pinnacle, with Pinnacle surviving the merger as a wholly owned subsidiary of Cascade. This structure preserves Pinnacle's existing contractual relationships, licenses, and corporate identity, which is important for maintaining continuity of the Pinnacle marketplace platform during the post-closing integration period.
The aggregate merger consideration is $4.7 billion, calculated as $26.85 per share of Pinnacle common stock multiplied by 175,047,319 shares outstanding as of the March 14, 2025 record date. The per-share consideration represents a premium of approximately 20.4% over Pinnacle's unaffected closing stock price of $22.30 per share on March 7, 2025, the last trading day prior to market rumors regarding a potential transaction. The premium level is generally consistent with recent comparable transactions in the technology and e-commerce space and reflects the strategic value of Pinnacle's seller base and platform technology to Cascade's marketplace expansion strategy.
Financing for the transaction is structured as follows:
• Cash on Hand: $1.9 billion from Cascade's existing balance sheet, reflecting the Company's strong cash generation and liquidity position.
• Term Loan B Facility: $2.8 billion senior secured Term Loan B facility from Whitmore National Bank, N.A., pursuant to a commitment letter dated March 12, 2025 (reference CRH-WNB-2025-TLB). Brian Alderman serves as the relationship manager at Whitmore National Bank for this facility.
• Revolving Credit Facility: $500 million revolving credit facility, not expected to be drawn at closing but available for working capital and general corporate purposes.
The Merger Agreement contains the following key termination provisions relevant to the regulatory challenge:
• Reverse Termination Fee (Regulatory Failure): $282 million (approximately 6% of total deal value), payable by Cascade to Pinnacle in the event the transaction fails to close due to an inability to obtain required antitrust clearance or as a result of an injunction or other order prohibiting the consummation of the merger.
• Company Termination Fee (Superior Proposal): $164.5 million (approximately 3.5% of total deal value), payable by Pinnacle to Cascade in the event the Merger Agreement is terminated in connection with Pinnacle's acceptance of a superior acquisition proposal.
• Outside Date: March 14, 2026 (12 months from the date of execution of the Merger Agreement), with an automatic three-month extension to June 14, 2026, if the sole remaining unsatisfied closing condition as of the original outside date is the receipt of antitrust clearance or the absence of a government injunction blocking the merger.
The transaction's financial advisors include Mercer Hollis & Co. (serving as Cascade's financial advisor, with Graham Mercer IV serving as Managing Director on the engagement) and Ridgeline Capital Partners (serving as Pinnacle's financial advisor, with Nadine Vasquez serving as Managing Director). Transaction counsel for the merger—separate from the antitrust litigation engagement—is Harmon Ridgeway & Strauss LLP, with Phillip Strauss serving as Lead M&A Partner and Monica Chen-Barrios serving as Senior Associate on the deal.
C. Regulatory Timeline
The following summarizes the key dates in the regulatory review process leading to the current litigation:
• April 2, 2025: Cascade and Pinnacle filed their respective Hart-Scott-Rodino ("HSR") Premerger Notification and Report Forms with the FTC and the Department of Justice Antitrust Division (Transaction No. HSR-20250402-0347). The initial 30-day waiting period commenced upon filing.
• May 7, 2025: The FTC issued a Second Request for Additional Information and Documentary Material (File No. 251-0089) to both Cascade and Pinnacle prior to the expiration of the initial waiting period, thereby extending the statutory waiting period until 30 days after substantial compliance with the Second Request. The Second Request was comprehensive, encompassing approximately 35 categories of documents and data relating to the parties' marketplace operations, competitive positioning, pricing, seller relationships, and strategic planning.
• June 10, 2025: Cascade and Pinnacle each certified substantial compliance with the Second Request, commencing the final 30-day waiting period.
• June 20, 2025: The FTC issued its administrative complaint (Docket No. 9438), alleging that the proposed acquisition would substantially lessen competition in violation of Section 7 of the Clayton Act, 15 U.S.C. § 18, and Section 5 of the Federal Trade Commission Act, 15 U.S.C. § 45. The complaint was authorized by a 3–2 vote of the Commission.
• June 23, 2025: The FTC filed its complaint in the United States District Court for the Western District of Washington seeking a temporary restraining order and preliminary injunction under Section 13(b) of the FTC Act, 15 U.S.C. § 53(b). The case was assigned to the Honorable Richard A. Johannsen and designated Case No. 2:25-cv-01087-RAJ.
• June 25, 2025: Calderwood & Harkness LLP was engaged by Cascade as lead defense counsel for the antitrust litigation.
• June 30, 2025: Calderwood & Harkness formally opened the matter (Matter No. 1038-00001).
The timeline from the HSR filing to the FTC's complaint—approximately 79 days—reflects the Commission's aggressive posture in this matter. The decision to file the administrative complaint only 10 days after the parties certified substantial compliance with the Second Request, and without engaging in meaningful pre-complaint settlement negotiations, suggests that the Commission staff had formed preliminary conclusions about competitive harm early in the review process, likely informed by third-party complaints from marketplace sellers and competing platforms.
III. Analysis of the FTC's Complaint
A. The FTC's Alleged Relevant Market
The market definition adopted by the FTC is the foundation upon which the Commission's entire competitive harm theory rests, and it is also the most aggressive analytical choice in the complaint. The FTC defines the relevant product market as "online marketplace platform services for third-party sellers in the United States." Complaint ¶¶ 28–36. The FTC further defines the relevant geographic market as the United States. Complaint ¶ 37.
This product market definition is deliberately narrow in several critical respects. It excludes:
1. Direct-to-consumer ("DTC") e-commerce retail — including, notably, Cascade's own CascadeDirect.com platform, as well as the DTC operations of major competitors such as Vertex Commerce's proprietary retail operations, traditional retailers' e-commerce channels (e.g., Walmart.com, Adriatic Corporation), and the vast universe of independent DTC websites built on platforms such as Dunmore Services Inc., Granite Harbor Services Inc., and Bramwell Health IT.
2. Social commerce platforms — platforms such as Brevity Social Commerce Inc. (launched 2023) and emerging competitors that integrate marketplace-like selling functionality with social media and content creation, enabling sellers to reach consumers through non-traditional channels.
3. Hybrid retail models — retailers that combine elements of proprietary retail and third-party marketplace functionality, blurring the line between "marketplace" and "retail" in ways that the FTC's product market definition cannot coherently accommodate.
4. Brick-and-mortar retail with an online presence — traditional retailers that compete for the same consumer spending through physical storefronts supplemented by online ordering, click-and-collect, and other omnichannel strategies.
The FTC's geographic market definition—the United States as a whole—is less controversial and likely correct for purposes of this proceeding. Online marketplace platforms operate on a national basis, and neither sellers nor consumers face meaningful geographic restrictions on their ability to participate in marketplace transactions. We do not anticipate challenging the geographic market definition.
Assessment. The product market definition is the FTC's most significant vulnerability and our most promising line of attack. The FTC needs this narrow market definition to generate the alarming concentration statistics that trigger the structural presumption under United States v. Philadelphia National Bank, 374 U.S. 321, 363 (1963), and its progeny. In a broader market encompassing "all e-commerce retail" or even "all online retail platforms," the combined entity's share of total U.S. e-commerce GMV would be approximately 7.3% (combined e-commerce and marketplace GMV of approximately $55.1 billion out of $757 billion in total U.S. e-commerce GMV in 2024), which falls far below any concentration threshold that would support a presumption of competitive harm. Even measuring only marketplace GMV against total e-commerce GMV, the combined entity's share would be approximately 1.9% ($14.5 billion combined marketplace GMV out of $757 billion total).
The key analytical question for Dr. Ramanathan's expert report is whether a hypothetical monopolist of "online marketplace platform services" could profitably impose a small but significant and non-transitory increase in price ("SSNIP")—in this context, an increase in take rates charged to third-party sellers—without losing sufficient seller volume to other retail channels to render the increase unprofitable. If sellers would respond to a take rate increase by shifting volume to DTC channels, social commerce platforms, or other distribution methods, the relevant market must be broadened to include those alternatives. We believe the evidence will strongly support this conclusion, particularly given the multi-homing behavior of sellers who already operate across multiple platforms simultaneously.
B. Market Share Allegations and HHI Analysis
The FTC's complaint contains detailed market share allegations and HHI calculations premised on the narrow "online marketplace platform services" market definition. According to the Complaint at ¶ 42, the FTC calculates the following market shares based on GMV within its alleged relevant market:
Based on these market share figures, the FTC presents the following HHI analysis at Complaint ¶ 47:
• Pre-merger HHI: 2,361
• Post-merger HHI: 2,856
• Delta (change in HHI): 495
The HHI delta is computed using the standard formula of 2 × S₁ × S₂, where S₁ and S₂ represent the market shares of the merging firms: 2 × 8.2 × 30.1 = 493.64, which the FTC rounds to 495.
Under the 2023 Merger Guidelines (and consistent with the framework established in the 2010 Horizontal Merger Guidelines), a market with a post-merger HHI above 2,500 is considered "highly concentrated," and a merger producing an HHI increase of more than 200 points in a highly concentrated market is presumed likely to enhance market power. The FTC's figures clear both thresholds: the post-merger HHI of 2,856 exceeds the 2,500 threshold, and the delta of 495 far exceeds the 200-point threshold. If the court accepts these figures at face value, the merger triggers a strong structural presumption of anticompetitive effect under Philadelphia National Bank and United States v. Tarvick Hughes Inc., 908 F.2d 981 (D.C. Cir. 1990).
Assessment. These concentration numbers are concerning if the court accepts the FTC's market definition, and they will be the primary basis on which the FTC argues that the burden should shift to the defendants to rebut the structural presumption. However, the HHI analysis is only as reliable as the market definition upon which it is constructed. If we can establish a broader relevant market—whether "all e-commerce retail," "all online retail platforms," or any definition broader than the FTC's—the HHI analysis becomes fundamentally unreliable and the structural presumption evaporates.
Even within the FTC's own narrow market, the competitive landscape presents complexities that cut in our favor. The combined entity at 38.3% would barely exceed Vertex Commerce at 35.7%, resulting in a market structure dominated by two firms of roughly equal size, followed by a third competitor (Nomad Shops at 14.6%) of meaningful but lesser scale, and a competitive fringe comprising newer entrants and smaller platforms. This two-firm quasi-duopoly structure cuts both ways analytically. The FTC can point to it as evidence of coordinated effects risk—arguing that two dominant firms may find it easier to tacitly coordinate on take rates and seller terms. But we can equally argue that the structure ensures robust head-to-head competition between the combined entity and Vertex Commerce, a well-financed, sophisticated competitor that would discipline any attempt by the merged firm to raise take rates or reduce seller services unilaterally. The presence of Vertex Commerce as a near-equal competitor substantially undermines the FTC's unilateral effects theory.
C. Theory of Harm
The FTC's complaint alleges that the proposed merger would cause competitive harm through the following mechanisms:
1. Elimination of a significant competitor. The merger would combine two of the four significant online marketplace platforms in the United States, reducing the number of major competitors from four to three. Complaint ¶¶ 48–52.
2. Loss of head-to-head competition. The merger would eliminate direct competition between CascadeMarket and Pinnacle for third-party sellers and, to a lesser extent, for consumer traffic. The FTC contends that both platforms actively compete for the same seller base and that the elimination of this rivalry would remove a significant competitive constraint. Complaint ¶¶ 53–59.
3. Seller-side harm through increased take rates and reduced services. The FTC alleges that the merged firm would have undue leverage over third-party sellers, enabling it to increase take rates, reduce seller-facing services and support, and diminish innovation in marketplace tools and seller analytics. Complaint ¶¶ 60–68. This is the FTC's primary theory of harm and reflects the Commission's increasing focus on input-side competition (i.e., competition for the services of suppliers or, in this case, third-party sellers) in addition to traditional consumer-side harm.
4. Trend toward concentration. The FTC argues that the online marketplace sector is experiencing a "trend toward concentration" and that the proposed merger would accelerate this trend, reducing competitive dynamism and raising barriers to entry for future marketplace platforms. Complaint ¶¶ 69–73.
The complaint's analytical framework indicates that the FTC is pursuing primarily a unilateral effects theory—i.e., the merger would enable the combined entity to exercise market power unilaterally by raising take rates on captive sellers—with a secondary coordinated effects theory suggesting that the reduction from four to three significant marketplace platforms would facilitate tacit or explicit coordination on pricing and seller terms.
Assessment. The unilateral effects theory is the FTC's strongest argument, but it is significantly undermined by seller multi-homing behavior. Multi-homing refers to the well-documented practice of third-party sellers operating across multiple marketplace platforms simultaneously—for example, listing the same products on CascadeMarket, Pinnacle, Vertex Commerce, and Nomad Shops, as well as maintaining independent DTC websites. If a substantial percentage of sellers actively multi-home, a post-merger take rate increase by the combined entity would prompt sellers to shift volume to competing platforms, making the increase unprofitable. Our preliminary review of Cascade's internal data suggests that multi-homing rates among CascadeMarket sellers are substantial, and we expect Dr. Ramanathan to develop this analysis in her expert report.
The "trend toward concentration" narrative is largely a policy argument rather than a legal one. While Section 7 of the Clayton Act was enacted to arrest trends toward concentration in their incipiency, Brown Shoe Co. v. United States, 370 U.S. 294, 317 (1962), the "trend" argument carries limited independent legal weight under modern Section 7 analysis. The FTC's invocation of this theme is more likely directed at Judge Johannsen's policy sensibilities than at the doctrinal framework. That said, the argument may resonate with certain judges, and we should be prepared to address it directly rather than dismiss it.
The coordinated effects theory is weaker. Three-to-two mergers in markets with differentiated products and non-transparent pricing are poor candidates for coordinated effects analysis. Marketplace take rates, seller terms, promotional programs, and platform features are not readily observable across competitors, making tacit coordination difficult to sustain. We should be prepared to argue that the conditions necessary for coordinated interaction—transparent pricing, market concentration among homogeneous competitors, mechanisms for detecting and punishing deviation—are not present in the online marketplace context.
D. Significance of the 3–2 Commission Vote
The Commission authorized the filing of the administrative complaint and the district court action by a vote of 3–2. This fact is significant for several reasons and should be integrated into our defense narrative.
First, the close vote signals genuine internal division on the merits within the Commission itself. The FTC is composed of five commissioners with substantial expertise in antitrust law and economics, and the fact that two of the five commissioners voted against bringing the challenge indicates that reasonable and informed decision-makers concluded that the case was either insufficiently supported by the evidence or represented an inappropriate exercise of enforcement discretion. This is not a case where the full Commission unanimously determined that the merger posed a clear threat to competition.
Second, the two dissenting commissioners likely concluded that the FTC's case was marginal—either because they disagreed with the narrow market definition, because they found the evidence of competitive harm insufficient, or because they believed the merger's procompetitive efficiencies outweighed any potential anticompetitive effects. The dissenting views, if publicly available, may provide useful arguments and analytical frameworks that mirror our own defense theories.
Third, while courts generally do not accord significant weight to internal agency deliberations in evaluating the merits of a government enforcement action, the close vote is useful for contextualizing the strength of the FTC's case. In the context of a Section 13(b) preliminary injunction proceeding, where the court must assess whether the FTC has "reason to believe" the merger violates Section 7, the fact that the Commission's own assessment was closely divided undermines any suggestion that the competitive harm is clear or undisputed.
Fourth, we should attempt to obtain any publicly available statements from the dissenting commissioners, which are sometimes issued contemporaneously with the announcement of a Commission enforcement action. If the dissenting commissioners published written statements, those statements may contain substantive criticisms of the market definition, the competitive effects analysis, or the sufficiency of the evidence that we can incorporate into our briefing and argument.
Caveat. Courts have generally held that internal agency deliberations, including Commission voting patterns, are not probative of the merits of the legal claims at issue. See, e.g., FTC v. Pemberton Corporation, 969 F.3d 974 (9th Cir. 2020) (evaluating FTC claims on the merits without reference to internal Commission dynamics). We should be careful not to overstate the significance of the 3–2 vote, but it remains a useful data point in framing the overall strength of the FTC's case.
IV. Preliminary Injunction Legal Standard Under Section 13(b)
A. Governing Framework
The FTC seeks a preliminary injunction under Section 13(b) of the Federal Trade Commission Act, 15 U.S.C. § 53(b), which authorizes the Commission to seek temporary restraining orders and preliminary injunctions in federal district court "[w]henever the Commission has reason to believe" that a merger or acquisition would violate Section 7 of the Clayton Act. The statute provides that the court "shall" grant such injunctive relief "upon a proper showing that, weighing the equities and considering the Commission's likelihood of ultimate success, such action would be in the public interest."
This statutory standard is materially different from—and more favorable to the government than—the traditional four-factor preliminary injunction test applied in private litigation. Under the traditional framework, a movant must establish: (1) a likelihood of success on the merits, (2) a likelihood of irreparable harm absent injunctive relief, (3) a balance of equities tipping in the movant's favor, and (4) that the injunction would serve the public interest. Winter v. Natural Resources Defense Council, Inc., 555 U.S. 7, 20 (2008). By contrast, Section 13(b) requires only that the FTC demonstrate: (1) it has "reason to believe" the merger violates Section 7, and (2) a preliminary injunction would be in the "public interest," with the court weighing the equities and considering the Commission's likelihood of ultimate success.
The practical effect of this lower standard is that the FTC need not demonstrate irreparable harm or a balance of equities tipping in its favor as independent prerequisites. Instead, the court conducts a holistic assessment focused on the public interest, giving significant weight to the FTC's likelihood of prevailing on the merits in the administrative proceeding.
Key Precedent. The leading precedent on the Section 13(b) standard is FTC v. H.J. Heinz Co., 246 F.3d 708 (D.C. Cir. 2001), in which the D.C. Circuit applied a "likelihood of success on the merits" analysis within the Section 13(b) framework, holding that the FTC was entitled to a preliminary injunction where it demonstrated that the merger would likely violate Section 7. The court held that the FTC could establish a prima facie case of competitive harm through the structural presumption arising from high market concentration, and that the burden then shifted to the defendants to rebut the presumption with evidence of efficiencies, ease of entry, or other procompetitive factors. See also FTC v. Sysco Corp., 113 F. Supp. 3d 1 (D.D.C. 2015) (granting preliminary injunction where FTC established market definition and competitive harm through expert testimony and documentary evidence); FTC v. Staples, Inc., 190 F. Supp. 3d 100 (D.D.C. 2016) (granting injunction in office supply merger where FTC demonstrated narrow but cognizable market); FTC v. Penn State Hershey Medical Center, 838 F.3d 327 (3d Cir. 2016) (reversing district court's denial of preliminary injunction where FTC established relevant geographic market).
Importantly, while courts typically afford the FTC a degree of deference in Section 13(b) proceedings, the FTC cannot rest on bare allegations or conclusory assertions of competitive harm. The Commission must present evidence—including economic expert testimony, documentary evidence, and fact witness testimony—sufficient to support its market definition and competitive effects theories. The Section 13(b) hearing is an evidentiary proceeding, and the court must make factual findings based on the record presented. See FTC v. RAG-Stiftung, 436 F. Supp. 3d 278 (D.D.C. 2020) (denying preliminary injunction where FTC failed to establish narrow market definition).
We note that the Western District of Washington has limited precedent on the Section 13(b) standard in merger cases. Judge Johannsen has not previously presided over an FTC merger challenge, which introduces additional uncertainty about how he will apply the standard and how much deference he will afford to the Commission's analytical framework.
B. Assessment of FTC's Likelihood of Success
The FTC's likelihood of success on the merits—and thus its likelihood of obtaining a preliminary injunction—turns almost entirely on the market definition question. The case follows a predictable analytical sequence: if the court accepts the FTC's narrow "online marketplace platform services" market, the structural presumption from the HHI analysis is strong (post-merger HHI of 2,856, delta of 495, both well above the guidelines thresholds), and the burden shifts to the defendants to rebut the presumption with evidence of countervailing competitive factors. If the court rejects or broadens the market definition, the HHI analysis produces numbers well below any threshold of concern, and the FTC's case effectively fails.
Within the FTC's narrow market, the structural presumption is formidable. The combined 38.3% market share is well above the 30% threshold that courts have generally found sufficient to trigger the presumption. See Philadelphia National Bank, 374 U.S. at 363 (combined share of 30% "threatens undue concentration"). Rebutting the structural presumption requires the defendants to present evidence that the market share statistics overstate the merger's likely competitive effects—through evidence of ease of entry, repositioning by existing competitors, efficiencies, or the declining competitive significance of the acquired firm. As discussed in Section V below, we have strong arguments on several of these rebuttal theories, but the burden of rebutting a strong structural presumption is substantial.
To defeat the market definition, we must show that the FTC's SSNIP test—applied to the marketplace platform services market—is methodologically flawed because it fails to account for the competitive constraints imposed by DTC e-commerce, social commerce, and other retail channels on marketplace take rates and seller terms. This is fundamentally an economic question that will be decided on the basis of expert testimony, and the strength of Dr. Ramanathan's analysis relative to Dr. Keenan's analysis will likely be dispositive.
Estimated Likelihood of FTC Success in Obtaining PI: 35–45%. This range reflects the following assessment:
• There is approximately a 50–55% chance that the court will accept or substantially adopt the FTC's narrow market definition. While we believe the broader market is the correct analytical framework, the FTC's definition is not frivolous, and it aligns with the Commission's recent enforcement approach in platform markets.
• If the court accepts the narrow market, there is approximately a 65–75% chance that the FTC will satisfy the PI standard, as the structural presumption will be strong and the burden on defendants heavy.
• If the court rejects the narrow market and adopts a broader definition, there is less than a 10% chance that the FTC will satisfy the PI standard.
• Blending these conditional probabilities yields an overall estimate of approximately 35–45%.
This estimate will be refined as discovery progresses and we gain a clearer picture of the documentary evidence and the strength of the competing expert analyses.
C. Equities Analysis
While the equities are not an independent prerequisite for a Section 13(b) injunction, the statute instructs the court to "weigh the equities" in determining whether an injunction would serve the public interest. The equitable considerations in this case favor Cascade.
First, the reverse termination fee of $282 million represents a concrete, quantifiable financial harm to Cascade if the merger fails due to a regulatory challenge. This is not a speculative or contingent harm; it is a contractual obligation that will be triggered if the transaction cannot close. Courts have recognized that the financial consequences of merger failure—including termination fees, financing costs, and management distraction—are relevant equitable considerations in Section 13(b) proceedings.
Second, the outside date structure creates significant time pressure. The Merger Agreement's outside date of March 14, 2026, with a limited three-month extension to June 14, 2026 available only if the sole unsatisfied condition is antitrust clearance, means that a prolonged injunction could effectively kill the transaction even without a final adjudication on the merits. If the preliminary injunction is granted in October or November 2025, and the subsequent administrative proceeding takes 6–12 months to complete, the outside date will expire before a final Commission decision is rendered, requiring the parties to either extend the outside date (potentially requiring renegotiation of the merger terms) or abandon the transaction.
Third, Pinnacle's competitive deterioration—discussed in Section V.A.4—makes delay independently harmful to both parties. Each month that the transaction remains pending is a month during which Pinnacle's competitive position continues to weaken, its seller base continues to erode, and the potential synergies from the combination diminish. The FTC's challenge thus has the perverse effect of exacerbating the very competitive harm it purports to prevent—by delaying the transaction, the FTC is allowing Pinnacle's marketplace to deteriorate further, which will ultimately harm the sellers and consumers the FTC claims to protect.
The FTC will counter that the public interest in preventing an anticompetitive merger outweighs private financial harm, and that the equities in Section 13(b) cases inherently favor the government because the public interest in competitive markets is paramount. Courts have generally agreed that private equitable considerations, standing alone, cannot defeat a preliminary injunction when the FTC makes a strong showing on the merits. See H.J. Heinz, 246 F.3d at 726 (holding that "the public equity considerations in an FTC Section 13(b) proceeding will often be the dispositive factor in the court's analysis").
Assessment. The equities alone are unlikely to carry the day if the FTC makes a strong showing on the merits. However, they provide useful leverage, particularly in the event of a close case where the court's assessment of the FTC's likelihood of success is uncertain. The outside date pressure, in particular, may incentivize Judge Johannsen to resolve the PI motion expeditiously rather than allowing the proceedings to drag on, which in itself could be advantageous for the defense.
V. Recommended Defense Strategy
A. Primary Defense Pillars
1. Market Definition Challenge
The market definition challenge is the most critical element of our defense. If we prevail on market definition, the FTC's case collapses. If we lose on market definition, we face an uphill battle on rebuttal.
Central Argument. The relevant product market should be defined as "all e-commerce retail" or, at minimum, "all online retail platforms"—not limited to the artificially narrow category of "online marketplace platform services for third-party sellers." The FTC's market definition imposes an analytically unjustifiable distinction between marketplace platform services and other forms of online retail competition that, from both the demand side and the supply side, impose meaningful competitive constraints on marketplace platforms.
Demand-Side Substitution. From the perspective of consumers, marketplace purchases and direct retail purchases are functionally interchangeable. A consumer seeking to purchase a set of kitchen knives can choose to buy from a third-party seller on Pinnacle, from a third-party seller on CascadeMarket, from Cascade's own CascadeDirect.com store, from Vertex Commerce's proprietary retail channel, from a direct-to-consumer website operated by the knife manufacturer, from a social commerce listing on Brevity Social Commerce, or from a brick-and-mortar retailer's website. The consumer does not distinguish between these channels based on the underlying economic relationship between the platform and the seller; the consumer cares about price, selection, convenience, and delivery speed. This broad pattern of demand-side substitution means that a hypothetical monopolist of "marketplace platform services" could not profitably raise take rates (which would be passed through to consumers as higher prices) without losing substantial consumer volume to non-marketplace retail channels.
Supply-Side Substitution. From the perspective of third-party sellers, the ability to shift sales volume across multiple channels—marketplace platforms, DTC websites, social commerce, wholesale distribution—provides a competitive constraint on any individual marketplace platform's take rate and terms of service. Sellers who currently use CascadeMarket and Pinnacle also operate on Vertex Commerce, Nomad Shops, and independent websites built on Dunmore Services Inc. and similar platforms. Multi-homing is pervasive, and the marginal cost of shifting volume from one channel to another is low. If the combined Cascade/Pinnacle entity attempted to raise take rates, sellers would respond by directing incremental volume to competing channels, rendering the increase unprofitable.
Cross-Platform Competition from Emerging Channels. The competitive landscape is evolving rapidly. Social commerce platforms—led by Brevity Social Commerce Inc. (launched in 2023, headquartered in Los Angeles, California) and Trove Marketplace Inc. (launched in 2024, headquartered in Chicago, Illinois)—represent a rapidly growing competitive force that blurs the line between marketplace selling, social media marketing, and direct-to-consumer retail. These platforms enable sellers to reach consumers through content-driven discovery rather than traditional search-based marketplace browsing, and they are attracting significant seller adoption. The FTC's narrow market definition fails to account for these emerging competitive constraints.
Quantitative Support. In a broader "all e-commerce retail" market, the combined entity's share of total U.S. e-commerce GMV is approximately 7.3% (combined e-commerce and marketplace GMV of approximately $55.1 billion out of $757 billion in total U.S. e-commerce GMV in 2024). Even measuring only marketplace GMV against total e-commerce GMV, the combined entity's share is approximately 1.9%. These figures are far below any concentration threshold that would support a presumption of competitive harm and would result in a post-merger HHI well below 1,500 (unconcentrated under the Merger Guidelines).
Expert Testimony. This argument will require robust economic expert testimony from Dr. Priya Ramanathan of Brindoval Analytics LLC. Dr. Ramanathan's report should present a SSNIP analysis demonstrating that the FTC's narrow market fails the hypothetical monopolist test, supported by seller switching data, multi-homing analysis, cross-elasticity estimates, and econometric modeling of seller response to take rate changes. The strength of Dr. Ramanathan's analysis relative to the FTC's expert, Dr. Wallace Keenan of Thornfield Research Group, will likely be determinative.
Two-Sided Platform Analysis. We should reference the analytical framework established in Ohio v. Halcyon Corporation, 585 U.S. 529 (2018), which held that market definition in two-sided platform contexts must account for the interdependent demand on both sides of the platform. Online marketplaces are classic two-sided platforms: they serve both sellers (who pay take rates for access to consumers) and consumers (who receive access to a broad selection of products). Any market definition analysis that considers only the seller side of the platform without accounting for the interdependent consumer side is incomplete and potentially misleading. While the applicability of Amex to merger analysis remains debated, the decision provides useful support for the proposition that narrow, single-sided market definitions in platform contexts are analytically suspect.
2. Procompetitive Efficiencies
Even if the court accepts the FTC's market definition and finds that the structural presumption is established, Cascade can rebut the presumption by demonstrating that the merger will generate substantial, verifiable, merger-specific efficiencies that benefit consumers and sellers. The Horizontal Merger Guidelines recognize cognizable efficiencies as a legitimate defense to a challenge based on structural market concentration, provided the efficiencies are (1) merger-specific (i.e., not achievable through less anticompetitive means), (2) verifiable (i.e., supported by credible evidence rather than speculative projections), and (3) sufficient in magnitude to reverse the merger's potential to harm competition.
Cascade projects merger-specific efficiencies of approximately $340 million annually by Year 3 post-closing, consisting of two principal components:
Logistics and Fulfillment Cost Savings ($195 Million). Cascade's existing 22-warehouse fulfillment network, which currently supports CascadeDirect.com and CascadeMarket, has significant excess capacity that can be utilized to fulfill orders from Pinnacle's seller base. By integrating Pinnacle's approximately 185,000 sellers into Cascade's fulfillment infrastructure, the combined entity can achieve substantial cost savings through reduced shipping costs, consolidated warehouse operations, and improved delivery times. These savings are merger-specific because Pinnacle does not operate its own fulfillment network of comparable scale and could not independently replicate Cascade's logistics capabilities without a capital investment of approximately $800 million to $1.2 billion over 3–5 years—an investment that Pinnacle's current financial trajectory does not support.
Technology and Platform Synergies ($145 Million). The integration of Pinnacle's marketplace technology stack into Cascade's platform infrastructure will eliminate duplicative technology costs including redundant server infrastructure, overlapping engineering teams, and parallel development efforts. In addition, the combined entity will be able to deploy Cascade's more advanced seller analytics tools, advertising technology, and consumer recommendation algorithms across the Pinnacle seller base, improving seller performance and consumer experience. These technology synergies are merger-specific because they require the full integration of the two platforms' data, algorithms, and engineering resources—an outcome achievable only through the combination.
Pass-Through to Consumers and Sellers. To be cognizable under the Merger Guidelines, efficiencies must be likely to be passed through to consumers (and, in this case, to third-party sellers). Cascade has committed, in its integration planning documents, to pass through a portion of the efficiency gains in the form of reduced take rates for sellers, improved fulfillment services (including faster shipping and lower fulfillment fees), and enhanced platform tools. The competitive pressure from Vertex Commerce, Nomad Shops, and emerging platforms provides a structural incentive for the combined entity to pass efficiency gains through to sellers and consumers rather than retain them as excess profits.
Key Fact Witness. Patricia "Trish" Delacroix, SVP of Marketplace & Platform Strategy, is the key fact witness for integration planning and efficiency projections. Ms. Delacroix led the internal team that developed the integration plan and the efficiency estimates, and her testimony will be critical to establishing the verifiability and merger-specificity of the projected savings. We should begin deposition preparation with Ms. Delacroix promptly.
Risk Assessment. Courts have historically been skeptical of efficiencies defenses, viewing projected cost savings as inherently speculative and difficult to verify. See, e.g., FTC v. H.J. Heinz, 246 F.3d at 720 (noting that "the court must undertake a rigorous analysis of the kinds of efficiencies being urged by the parties in order to ensure that those 'ichthyological efficiency claims' are not merely 'speculative, self-serving, [and] could not be verified'"). The $340 million annual savings figure is substantial, but we must be prepared to defend every element of the projection with detailed documentation, third-party validation, and credible expert analysis. The FTC will attack the efficiencies as overstated, speculative, and not merger-specific, arguing that Cascade could achieve many of the same savings through organic expansion of CascadeMarket or through a less anticompetitive transaction.
3. Ease of Entry and Expansion
The ease with which new competitors can enter the online marketplace market—and with which existing competitors can expand—is a critical factor in assessing the merger's competitive effects. If entry and expansion are relatively easy, the merged entity's ability to exercise market power will be constrained by the threat of new competition, even in a concentrated market.
The evidence of recent entry into the marketplace space is compelling. Brevity Social Commerce Inc. launched in 2023 and has rapidly gained seller and consumer traction by combining marketplace functionality with social media content creation and influencer-driven product discovery. Based in Los Angeles, California, Brevity represents a new model of marketplace competition that the FTC's complaint largely ignores. Trove Marketplace Inc. launched in 2024 in Chicago, Illinois, with a focus on curated, premium consumer products and a commitment to lower seller take rates as a competitive differentiator. Both entrants demonstrate that the barriers to launching a new online marketplace platform are not prohibitive, and that innovative business models can attract sellers and consumers even in a market with established incumbents.
Beyond new entrants, the expansion of social commerce platforms more broadly—including features offered by major social media platforms that increasingly integrate shopping functionality—represents a rapidly growing competitive constraint on traditional marketplace platforms. Sellers can now reach consumers directly through social media storefronts, livestream shopping events, and content-driven product placements, all of which compete for the same seller attention and consumer spending that traditional marketplaces serve.
Additionally, DTC aggregation models—platforms that help sellers build and manage independent online stores—provide an alternative channel for sellers who wish to reduce their dependence on marketplace platforms. The availability of these alternatives ensures that sellers are not captive to any single marketplace, even post-merger.
Finally, within the FTC's own narrow market, Vertex Commerce at 35.7% market share provides a dominant alternative for sellers. Vertex Commerce is a well-resourced, technologically sophisticated competitor that has been investing heavily in seller services, fulfillment capabilities, and platform features. Its continued presence ensures vigorous competition regardless of the merger outcome.
4. Weakening Competitor / Pinnacle's Competitive Trajectory
The FTC's market share figures are a snapshot of Pinnacle's current position, but they obscure a critical dynamic reality: Pinnacle's competitive position has been deteriorating significantly over the past two years, and its trajectory suggests further decline absent the merger.
The key metrics demonstrating Pinnacle's competitive deterioration are:
• GMV Growth Rate Deceleration: Pinnacle's year-over-year GMV growth has slowed sharply from 28% in 2022 to 18% in 2023 to just 9% in 2024. This deceleration reflects increasing competitive pressure from Vertex Commerce, CascadeMarket, and new entrants, as well as saturation in Pinnacle's core product categories (home goods and artisanal products).
• Seller Churn Rate Increase: The rate at which sellers leave the Pinnacle platform has risen from 12% in 2022 to 21% in 2024, reflecting seller dissatisfaction with Pinnacle's platform tools, fulfillment services, and competitive positioning relative to alternatives. This nearly doubled churn rate is a leading indicator of continued competitive decline.
These trends suggest that Pinnacle's 30.1% market share—the largest component of the FTC's concentration analysis—significantly overstates Pinnacle's actual competitive significance on a forward-looking basis. A firm that is losing sellers at an accelerating rate and experiencing rapidly decelerating growth is not the vigorous, independent competitor that the FTC's static market share figures imply.
We acknowledge that Pinnacle likely does not meet the strict requirements of the "failing firm" defense recognized in the Merger Guidelines and case law. The failing firm defense requires a showing that (1) the acquired firm is in imminent danger of business failure, (2) the firm is unable to reorganize successfully under Chapter 11 of the Bankruptcy Code, and (3) there is no alternative purchaser whose acquisition would pose fewer competitive concerns. Pinnacle is not imminently failing—it remains profitable, has positive cash flow, and has not explored bankruptcy. The failing firm defense is therefore inapplicable in the strict sense.
However, the "weakening competitor" argument occupies distinct analytical ground. Courts have recognized that a firm's declining competitive position is a relevant factor in assessing the likely competitive effects of a merger, even if the firm does not meet the failing firm test. See United States v. Fenmore Industries, 415 U.S. 486, 503–04 (1974) (holding that the acquired firm's declining market position and depletion of reserves rendered its static market share figures unreliable as predictors of future competitive significance); FTC v. National Tea Co., 603 F.2d 694 (8th Cir. 1979) (considering weakening competitor evidence in evaluating merger's competitive effects). Under this line of authority, Pinnacle's declining trajectory materially diminishes the anticompetitive potential of the acquisition because the merger eliminates less competition than the FTC's static market share figures suggest.
Key Witnesses. The weakening competitor argument depends heavily on testimony from Pinnacle's executives—particularly Rajiv Chandravar (CEO) and Thomas Breck (CFO)—who can speak to the competitive challenges facing the company, the reasons for seller churn, the deceleration in growth, and the strategic rationale for agreeing to the sale. This testimony must be developed in coordination with Whitfield, Greer & Tanaka LLP, who represent Pinnacle and will take the lead on preparing Pinnacle's witnesses.
B. Daubert Motion Strategy
We should seriously consider filing a motion under Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993), and Federal Rule of Evidence 702, to exclude or limit the expert testimony of Dr. Wallace Keenan of Thornfield Research Group, the FTC's designated testifying expert on market definition and competitive effects.
Potential Grounds for the Motion. Based on our preliminary review of the FTC's complaint (which recites Dr. Keenan's conclusions but does not fully disclose his methodology), we anticipate the following potential bases for a Daubert challenge:
• Flawed SSNIP Test Methodology. If Dr. Keenan's market definition analysis applies the SSNIP test solely to the seller side of the marketplace platform—i.e., evaluating whether a hypothetical monopolist of marketplace services could profitably raise take rates on sellers—without accounting for the interdependent demand on the consumer side or the supply-side substitution available to sellers through DTC and social commerce channels, his methodology is incomplete and unreliable. A properly conducted SSNIP test in a two-sided platform market must account for competitive constraints on both sides of the platform.
• Unreliable Seller-Side Diversion Ratios. The FTC's unilateral effects theory likely relies on diversion ratios—estimates of the share of seller volume lost by one merging party that would be captured by the other merging party in the event of a take rate increase. If Dr. Keenan's diversion ratios are based on survey data that fails to account for multi-homing, that uses leading or biased survey questions, or that artificially restricts the choice set available to sellers, the resulting estimates may be unreliable and inadmissible.
• HHI Calculations Based on Improperly Defined Market. While HHI calculations are straightforward arithmetic once market shares are established, the calculations are only meaningful if the underlying market definition is correct. If the court determines that the market definition is flawed, the HHI calculations derived from that market are inherently unreliable. A Daubert motion can frame this issue by arguing that Dr. Keenan's conclusions rest on an analytically deficient foundation.
Timing. Any Daubert motion must be filed well in advance of the September 8 preliminary injunction hearing. Based on the anticipated schedule, expert reports are due August 18, 2025, and the motion should be filed promptly thereafter—likely in the week of August 18–22—concurrent with or shortly after the exchange of expert reports. We should raise the issue at the July 14 case management conference to ensure that the court's scheduling order accommodates a Daubert briefing schedule.
Risk Assessment. Daubert motions in the context of antitrust preliminary injunction hearings are rarely fully successful. Courts in PI proceedings typically prefer to consider the competing expert testimony and assess its reliability as part of the overall weight of the evidence rather than excluding testimony altogether. However, even an unsuccessful Daubert motion can serve important strategic purposes: it signals to the court the specific methodological weaknesses in the FTC's economic ana

CALDERWOOD & HARKNESS LLP INTERNAL MEMORANDUM

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