PRIVILEGED AND CONFIDENTIAL — ATTORNEY-CLIENT PRIVILEGE / ATTORNEY WORK PRODUCT
CALDERWOOD & HARKNESS LLP 1333 New Hampshire Avenue NW, Suite 700 Washington, DC 20036
PRIVILEGED AND CONFIDENTIAL — ATTORNEY-CLIENT PRIVILEGE / ATTORNEY WORK PRODUCT
MEMORANDUM
Engagement No.: 1032-00005
November 1, 2023
This memorandum is a privileged and confidential attorney-client communication and constitutes attorney work product prepared in anticipation of litigation. It is intended solely for the use of the addressees identified above and should not be disclosed to any third party without the prior written consent of Calderwood & Harkness LLP. Disclosure to any unauthorized person may constitute a waiver of the attorney-client privilege and/or work product protection.
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I. Executive Summary
On October 30, 2023, the Antitrust Division of the United States Department of Justice ("DOJ") filed a civil antitrust complaint in the United States District Court for the District of Columbia seeking a permanent injunction to block the proposed $800,000,000 all-cash acquisition of Vectris Photonics, Inc. ("Vectris") by Halcyon Semiconductor Aktiengesellschaft ("Halcyon" or the "Company"). The case has been assigned the caption United States of America v. Halcyon Semiconductor Aktiengesellschaft and Vectris Photonics, Inc., Case No. 1:23-cv-03187 (D.D.C.), and has been randomly assigned to the Honorable Patricia K. Sullivan.
The complaint alleges that the proposed merger would substantially lessen competition in violation of Section 7 of the Clayton Antitrust Act, 15 U.S.C. § 18, in what the DOJ defines as the U.S. market for "silicon photonics transceiver modules for hyperscale data center interconnects." The central theory of the government's case is that the combined entity would control approximately 47% of the domestic market — calculated as the aggregation of Halcyon's approximately 19% share and Vectris's approximately 28% share — thereby creating a dominant supplier in an already highly concentrated market and eliminating meaningful head-to-head competition between two of the three leading participants.
This memorandum provides an initial assessment of the complaint, the DOJ's theories of harm, the available defenses, the estimated costs and timeline of litigation, and the strategic options available to the Board. It is provided to assist the members of the Vorstand and the Aufsichtsrat in evaluating Halcyon's path forward, including the potential exercise of termination rights under Section 8.1(d) of the Agreement and Plan of Merger dated August 10, 2023 (the "Merger Agreement").
Based on our assessment of the strength of the DOJ's evidence, the specific market definition advanced in the complaint, the anticipated customer testimony, and current judicial trends in merger enforcement, Calderwood & Harkness estimates the likelihood of Halcyon prevailing at trial at below 35%. This assessment accounts for the available defenses — including broader market definition arguments, efficiencies, and potential remedy proposals — but concludes that none of these defenses, individually or collectively, is sufficiently strong to provide confidence that Halcyon could overcome the structural presumption arising from the 47% combined market share.
The estimated total litigation costs through trial — encompassing outside counsel fees, economic expert witnesses, e-discovery and document review, fact witness preparation and depositions, and ancillary costs — would exceed $45 million. These costs are exclusive of the parallel European Commission Phase II in-depth investigation (Case M.11247), which was opened on October 6, 2023, and which compounds the regulatory headwinds facing the transaction. The dual-track regulatory challenge further diminishes the overall probability of successfully completing the acquisition, as clearance in both jurisdictions is required as a condition to closing.
In light of these considerations, and as discussed more fully in Section VII below, Calderwood & Harkness's preliminary recommendation is that termination of the Merger Agreement under Section 8.1(d) warrants serious consideration by the Board. A formal recommendation memorandum addressing the mechanics of termination, surviving obligations, and detailed financial implications is in preparation and is anticipated for delivery in mid-November 2023.
II. Background and Procedural History
A. Transaction Overview
On August 10, 2023, Halcyon Semiconductor Aktiengesellschaft, a stock corporation organized under the laws of the Federal Republic of Germany and listed on the Frankfurt Stock Exchange (FSE: HSAG) and on the Nasdaq Stock Market through an American Depositary Receipt program (Nasdaq ADR: HCYN), Halcyon Acquisition Sub, Inc., a Delaware corporation and wholly owned subsidiary of Halcyon (Delaware File No. 7634291) ("Merger Sub"), and Vectris Photonics, Inc., a Delaware corporation (Delaware File No. 5918437) ("Vectris"), entered into an Agreement and Plan of Merger (the "Merger Agreement"). The Merger Agreement was unanimously approved by the Vectris board of directors and subsequently approved by Vectris stockholders at a special meeting held on September 22, 2023, at which holders of approximately 78.6% of the outstanding shares of Vectris common stock voted in favor of the transaction.
Transaction Structure. The transaction is structured as a reverse triangular merger under the Delaware General Corporation Law ("DGCL"). Under the terms of the Merger Agreement, Merger Sub will merge with and into Vectris, with Vectris surviving as a wholly owned subsidiary of Halcyon. Upon the effective time of the merger, each outstanding share of Vectris common stock (other than shares held by Halcyon, Merger Sub, or Vectris, or by stockholders who have properly exercised appraisal rights under Section 262 of the DGCL) will be converted into the right to receive $13.70 per share in cash, without interest.
Aggregate Consideration. The aggregate cash consideration payable to Vectris stockholders is approximately $800,000,000, calculated on the basis of approximately 58,394,160 fully diluted shares of Vectris common stock (including shares issuable upon exercise of in-the-money stock options and settlement of restricted stock units, net of withholding). The per-share price of $13.70 represents a premium of approximately 39.5% to the unaffected closing price of Vectris common stock of $9.82 on May 19, 2023, the last trading day prior to media reports of Halcyon's interest in the silicon photonics sector.
Financing. The cash consideration is to be funded through a combination of Halcyon's available cash and borrowings under a $500 million senior secured term loan facility committed by Meridian Atlantic Bank, N.A., pursuant to a commitment letter dated August 8, 2023.
Profile of Vectris Photonics, Inc. Vectris is a fabless designer of silicon photonics transceiver modules and co-packaged optics ("CPO") chiplets for hyperscale data center interconnects. The company is headquartered in San Jose, California, with additional design centers in Austin, Texas, and Eindhoven, the Netherlands. In its fiscal year ended December 31, 2022, Vectris reported revenue of approximately $312 million and EBITDA of approximately $74 million. Vectris employs approximately 1,450 people globally and holds a substantial intellectual property portfolio consisting of 187 issued U.S. patents and 43 pending U.S. patent applications, covering core silicon photonics technologies including photodetectors, Mach-Zehnder modulators, waveguide architectures, and packaging techniques for co-packaged optics. Vectris's primary customers include three of the five largest U.S. hyperscale cloud operators by data center capacity.
Profile of Halcyon Semiconductor AG. Halcyon is a German semiconductor company with a broad product portfolio spanning analog and mixed-signal semiconductors, power management integrated circuits, and radio-frequency components. In its fiscal year ended December 31, 2022, Halcyon reported consolidated revenue of approximately €6.8 billion and maintained a market capitalization of approximately €22.4 billion as of the date of signing of the Merger Agreement. Halcyon operates fabrication facilities ("fabs") in Munich, Dresden, and Singapore, as well as design centers across Europe, Asia, and North America. Halcyon's silicon photonics business unit — which is the subject of the competitive overlap at issue in the DOJ complaint — represents a smaller but growing portion of Halcyon's overall revenue, generating approximately $245 million in revenue in FY2022 from the sale of silicon photonics transceiver modules to data center and telecommunications customers in the United States and globally.
Strategic Rationale. The acquisition of Vectris was intended to accelerate Halcyon's expansion into the high-growth silicon photonics market and to combine Halcyon's advanced manufacturing capabilities and global scale with Vectris's leading-edge photonics IP, design expertise, and established customer relationships with hyperscale cloud operators. Halcyon's internal strategic analysis, presented to the Vorstand in May 2023, projected that the combination would generate annualized cost synergies of approximately $55–65 million within 36 months of closing and would position the combined entity as a leading provider of next-generation optical interconnect solutions for data centers.
B. Regulatory Timeline
The following summarizes the key regulatory milestones from signing through the filing of the DOJ complaint:
• August 10, 2023: Halcyon and Vectris execute the Merger Agreement.
• August 18, 2023: Halcyon and Vectris file premerger notification forms under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the "HSR Act"), 15 U.S.C. § 18a, with the Federal Trade Commission ("FTC") and the DOJ. The transaction was reportable under the HSR Act because the value of the acquisition exceeded the applicable size-of-transaction threshold. The DOJ assumed clearance responsibility for the review of the transaction.
• August 25, 2023: Halcyon files a Form CO notification with the European Commission under the EU Merger Regulation (Council Regulation (EC) No 139/2004) (Case M.11247 — Halcyon Semiconductor / Vectris Photonics).
• September 15, 2023: The DOJ issues a Request for Additional Information and Documentary Material (commonly referred to as a "Second Request") pursuant to 16 C.F.R. § 803.20, directed to both Halcyon and Vectris. The Second Request was issued three days before the initial 30-day HSR waiting period would have expired on September 18, 2023. Issuance of the Second Request extended the HSR waiting period until 30 days after both parties have substantially complied with the request, a process that remains ongoing.
• October 6, 2023: The European Commission opens a Phase II in-depth investigation into the proposed transaction (Case M.11247), citing serious doubts as to the compatibility of the concentration with the internal market, particularly with respect to the market for co-packaged optics chiplets sold to European cloud operators.
• October 10, 2023: Calderwood & Harkness submits a competitive effects white paper to the DOJ on Halcyon's behalf, presenting economic analysis and industry evidence in support of a broader relevant product market definition that would include all optical transceiver technologies, not limited to silicon photonics. The white paper also addresses efficiencies, entry conditions, and the dynamic nature of competition in the data center interconnect market.
• October 20, 2023: Calderwood & Harkness submits a proposed structural remedy to the DOJ on Halcyon's behalf, offering the divestiture of Halcyon's existing U.S. silicon photonics product line — encompassing specified tangible and intangible assets, customer contracts, and associated personnel — to an approved third-party purchaser as a condition of closing. The proposed divestiture was intended to address the horizontal overlap between Halcyon and Vectris by eliminating Halcyon's independent presence in the U.S. silicon photonics transceiver market.
• October 30, 2023: The DOJ files its civil antitrust complaint in the U.S. District Court for the District of Columbia, seeking a permanent injunction blocking the proposed merger. The filing of the complaint came ten days after Halcyon's submission of the proposed remedy package, indicating the DOJ's determination that the proposed divestiture was insufficient to resolve its competitive concerns.
C. Merger Agreement Termination Provisions
The Merger Agreement contains several provisions relevant to the Board's evaluation of strategic options in light of the DOJ complaint. The key provisions are summarized as follows:
Outside Date. Section 8.1(b)(i) of the Merger Agreement provides that either Halcyon or Vectris may terminate the agreement if the merger has not been consummated on or before March 10, 2024 (the "Outside Date"), which is 180 calendar days from the date of signing. However, the Outside Date is subject to an automatic extension of 90 days — to June 10, 2024 — if, as of March 10, 2024, all conditions to closing have been satisfied or waived other than the receipt of required antitrust approvals (Section 8.1(b)(ii)). The automatic extension operates without the need for either party's affirmative action.
Antitrust Termination Right. Section 8.1(d) of the Merger Agreement provides that either party may terminate the agreement if the required antitrust approvals — defined in the agreement as clearance under the HSR Act and approval (or deemed approval) under the EU Merger Regulation — have not been obtained by the Outside Date (or the extended Outside Date, as applicable). This provision is the most directly relevant termination mechanism in the current circumstances.
Reverse Break-Up Fee. Section 8.3(b) of the Merger Agreement provides that if the agreement is terminated under circumstances attributable to the failure to obtain antitrust approvals, and Halcyon has not used its "reasonable best efforts" (as defined in Section 6.5 of the agreement) to obtain such approvals, Halcyon shall pay to Vectris a reverse break-up fee of $28,000,000, representing 3.5% of the aggregate deal value. The "reasonable best efforts" covenant in Section 6.5 requires Halcyon to take all actions reasonably necessary to obtain antitrust clearance, including proposing divestitures, provided that Halcyon is not required to divest assets or accept conditions that would, individually or in the aggregate, result in a "Burdensome Condition" (defined as a condition that would reasonably be expected to have a material adverse effect on the combined company taken as a whole).
Target Termination Fee. Section 8.3(a) provides that in the event the Merger Agreement is terminated by Halcyon due to certain Vectris-related breaches or by Vectris in order to accept a superior proposal, Vectris shall pay to Halcyon a termination fee of $24,000,000, representing 3.0% of the aggregate deal value. This provision is not directly implicated by the current regulatory circumstances but is noted for completeness.
III. Summary of the DOJ Complaint
The following is a detailed summary of the material allegations and legal theories set forth in the DOJ's civil antitrust complaint filed on October 30, 2023. This summary is based on Calderwood & Harkness's review of the complaint as filed and is not intended as a substitute for the Board's review of the complaint itself, a copy of which was provided to Dr. Hartmann's office on October 30, 2023.
A. Parties Named
The complaint identifies the following parties:
• Plaintiff: The United States of America, acting through the Antitrust Division of the Department of Justice.
• Defendant: Halcyon Semiconductor Aktiengesellschaft, a stock corporation organized under the laws of the Federal Republic of Germany, with its principal place of business in Munich, Germany.
• Defendant: Vectris Photonics, Inc., a corporation organized under the laws of the State of Delaware, with its principal place of business in San Jose, California.
The complaint establishes jurisdiction under Section 15 of the Clayton Act, 15 U.S.C. § 25, and 28 U.S.C. §§ 1331 and 1337, and alleges venue is proper in the District of Columbia under Section 12 of the Clayton Act, 15 U.S.C. § 22, because Halcyon transacts business in the District through its U.S. operations and government affairs activities.
B. Relevant Product Market
The DOJ defines the relevant product market as "silicon photonics transceiver modules for hyperscale data center interconnects." This market definition is central to the government's case and is drawn narrowly to capture a specific segment of the broader optical transceiver and data center interconnect industry.
The complaint characterizes silicon photonics transceiver modules as a distinct product market from traditional pluggable optical transceivers (such as those based on indium phosphide laser technologies) and from electrical copper interconnects. The basis for this distinction, as articulated in the complaint, rests on the following performance characteristics that the DOJ alleges are uniquely required by hyperscale cloud operators:
• Bandwidth density: Silicon photonics transceivers offer significantly higher bandwidth per unit of physical space compared to traditional optical and electrical alternatives, a critical requirement for the dense interconnect architectures employed in hyperscale data centers.
• Power efficiency: Silicon photonics modules achieve lower power consumption per gigabit of data transmitted, a material consideration for hyperscale operators managing power budgets across facilities with tens of thousands of server racks.
• Latency: Silicon photonics transceivers deliver lower and more predictable latency in short-reach and medium-reach data center interconnect applications, supporting the real-time workloads (including AI training and inference) increasingly prevalent in hyperscale environments.
The complaint further alleges that the relevant product market includes not only discrete silicon photonics transceiver modules — which are the current predominant form factor — but also co-packaged optics ("CPO") chiplets that integrate photonics directly with switch ASICs on the same package substrate. The DOJ characterizes CPO as the next-generation evolution of silicon photonics transceiver technology and alleges that both Halcyon and Vectris are among the leading developers of CPO solutions, making their independent innovation efforts particularly important to future competition.
The DOJ argues that the products within this market definition are not reasonably interchangeable with legacy transceiver technologies. The complaint asserts that a hypothetical monopolist of silicon photonics transceiver modules for hyperscale data center interconnects could profitably impose a small but significant and non-transitory increase in price ("SSNIP") without losing sufficient sales to alternative technologies to render the price increase unprofitable, thereby satisfying the hypothetical monopolist test used to define relevant product markets under the DOJ/FTC Merger Guidelines.
C. Relevant Geographic Market
The DOJ defines the relevant geographic market as the United States. The complaint focuses on the domestic market on the ground that U.S. hyperscale cloud operators — which constitute the primary customer base for silicon photonics transceiver modules — procure and specify these products through U.S.-based sourcing decisions, even when the modules are manufactured abroad. The DOJ notes that three of the top five U.S. hyperscale cloud operators by data center capacity are current Vectris customers, and that sourcing decisions for silicon photonics transceivers are made at the corporate level by U.S.-based procurement and engineering teams.
The complaint does not address the European Economic Area ("EEA") market or competitive conditions outside the United States. The competitive dynamics in the EEA are the subject of the separate Phase II investigation by the European Commission (Case M.11247), which is proceeding on a parallel track. The DOJ's focus on the U.S. market is consistent with the standard approach in DOJ merger challenges, which analyze competitive effects within the borders of the United States.
D. Market Share and Concentration Allegations
The complaint alleges that the proposed merger would result in a combined entity controlling approximately 47% of the U.S. market for silicon photonics transceiver modules for hyperscale data center interconnects. The DOJ calculates this combined share as the aggregation of:
• Halcyon: approximately 19% domestic market share
• Vectris: approximately 28% domestic market share
The complaint further alleges that the pre-merger market is already "highly concentrated" and that the post-merger market would be significantly more so. In support of this allegation, the DOJ presents a Herfindahl-Hirschman Index ("HHI") analysis. The complaint alleges that:
• The post-merger HHI would significantly exceed 2,500, the threshold above which a market is considered highly concentrated under the DOJ/FTC Horizontal Merger Guidelines (2023 edition).
• The change in HHI resulting from the merger (the "delta") would exceed 200, the threshold above which a merger is presumed likely to enhance market power in a highly concentrated market.
The DOJ identifies only two other significant competitors in the domestic silicon photonics transceiver market: a firm referred to in the complaint as "Competitor A" (which Calderwood & Harkness understands to be Luminos Systems, Inc., based on publicly available information) and "Competitor B" (which we understand to be Optivance Corporation). The remaining market share is characterized as fragmented among several smaller players, none of which individually holds more than a low-single-digit percentage share.
The complaint characterizes the merger as one that would transform the market structure from three major suppliers to two, creating a dominant firm with nearly half of the domestic market and fundamentally altering the competitive dynamics.
E. Theories of Competitive Harm
The DOJ's complaint advances four theories of competitive harm, each of which it alleges would independently constitute a substantial lessening of competition in violation of Section 7 of the Clayton Act:
1. Unilateral Effects. The complaint alleges that the merger would eliminate direct head-to-head competition between Halcyon and Vectris, which the DOJ characterizes as each other's closest competitors, particularly in next-generation co-packaged optics. The DOJ asserts that internal business documents from both companies — presumably obtained during the Second Request process — demonstrate that each company closely monitors the other's product development, pricing, and customer relationships. The complaint contends that the elimination of this rivalry would enable the combined firm to raise prices, reduce output, degrade product quality, or reduce innovation without fear of losing sales to the other party, because the merged entity would internalize the competitive externality that currently constrains each firm's behavior.
2. Coordinated Effects. The complaint alleges that the reduction in the number of major suppliers from three to two would significantly increase the risk of tacit coordination on pricing and capacity allocation. The DOJ asserts that the post-merger market structure — with two dominant firms (the combined Halcyon/Vectris and one remaining major competitor) controlling the vast majority of the market — would be conducive to parallel pricing behavior, reduced capacity investment, and other forms of coordination that are difficult to detect and enforce against. The complaint notes that the homogeneity of silicon photonics transceiver products and the transparency of pricing in a market with few large customers further facilitate coordination.
3. Customer Harm. The complaint cites statements from hyperscale cloud operators expressing concern about the loss of Vectris as an independent supplier. The DOJ alleges that customers would lose bargaining leverage as a result of the elimination of a credible alternative supplier. The complaint asserts that hyperscale operators currently use the competitive tension between Halcyon and Vectris — along with the third major supplier — to negotiate favorable pricing, supply terms, and product customization commitments. The merger, the DOJ alleges, would deprive these customers of a critical bargaining chip.
4. Innovation Effects. The complaint alleges that the merger would reduce incentives to invest in next-generation silicon photonics research and development. The DOJ asserts that Halcyon and Vectris maintain independent and rival innovation programs — particularly in co-packaged optics, advanced modulation formats, and waveguide densification — and that the elimination of Vectris's independent innovation track would diminish the overall pace and diversity of technological progress in the market. The complaint characterizes the silicon photonics sector as one in which innovation competition is a primary dimension of rivalry and alleges that the merger would be particularly harmful on this dimension.
F. Barriers to Entry
The complaint alleges that high barriers to entry and expansion would prevent new competition from emerging in a timely manner sufficient to offset the anticompetitive effects of the merger. The DOJ identifies the following barriers:
• intellectual property portfolios: Effective competition in silicon photonics requires access to extensive and overlapping patent portfolios. Vectris alone holds 187 issued U.S. patents and 43 pending applications, and the complaint alleges that the broader industry landscape is characterized by dense patent thickets that deter entry.
• Capital investment: The development and commercialization of silicon photonics transceiver modules requires significant capital investment in design tools, prototyping, testing infrastructure, and — for non-fabless entrants — fabrication facilities.
• Qualification cycles: Hyperscale cloud operators subject silicon photonics suppliers to rigorous qualification processes that typically require 18 to 24 months from initial engagement to production approval. These cycles create a significant time-to-market barrier for new entrants.
• Talent scarcity: The complaint alleges a scarcity of qualified photonics engineers and that experienced talent is concentrated among the existing major suppliers, making it difficult for new entrants to assemble competitive design teams.
The DOJ argues that, in light of these barriers, new entry or meaningful expansion by existing fringe competitors is unlikely to be timely, likely, or sufficient to offset the anticompetitive effects of the merger — the three-part test applied by courts in assessing whether entry can rebut a structural presumption of harm.
G. Rejection of Proposed Remedy
The DOJ filed its complaint notwithstanding Halcyon's October 20, 2023 submission of a proposed structural remedy to the Antitrust Division. As noted in Section II.B above, Halcyon, through Calderwood & Harkness, proposed the divestiture of Halcyon's existing U.S. silicon photonics product line — including specified tangible assets, intellectual property licenses, customer contracts, and associated personnel — to an approved third-party purchaser.
The DOJ's decision to file the complaint ten days after the remedy submission constitutes an implicit rejection of the proposed divestiture package. While the complaint does not expressly reference or address the proposed remedy, the DOJ's pre-suit rejection is consistent with the position, communicated informally by DOJ staff to Calderwood & Harkness during the review process, that the competitive concerns raised by the transaction could not be adequately addressed through the divestiture of Halcyon's existing silicon photonics assets alone. The possible grounds for this conclusion, based on our understanding of DOJ staff concerns, include:
• The divested product line may lack standalone viability as a competitive business and would require significant ongoing transitional support from Halcyon.
• The pool of qualified buyers for the divested assets is uncertain, and the DOJ may not have confidence that a divestiture buyer would emerge as an effective competitor within a reasonable timeframe.
• Halcyon would retain the ability to recreate the divested capability, given its broader semiconductor manufacturing infrastructure and technical expertise, potentially re-entering the silicon photonics market after the transaction has closed.
• The proposed divestiture of Halcyon's existing product line would not address the DOJ's concerns about the elimination of Vectris's independent innovation track, which is the core of the innovation effects theory of harm.
H. Relief Sought
The complaint seeks the following relief:
1. A permanent injunction blocking the consummation of the proposed merger between Halcyon and Vectris.
2. An adjudication that the proposed merger would violate Section 7 of the Clayton Act, 15 U.S.C. § 18.
3. An award of the costs of suit, including reasonable attorneys' fees to the extent permitted by law.
The complaint does not seek monetary damages, disgorgement, or any form of behavioral remedy. It is a purely injunctive action, as is typical in DOJ merger challenges.
IV. Assessment of the DOJ's Theory and Likelihood of Success
This section provides Calderwood & Harkness's assessment of the relative strengths and weaknesses of the DOJ's case and Halcyon's available defenses. This assessment is based on our review of the complaint, our familiarity with the documentary record developed during the Second Request process, our understanding of the anticipated evidence (including likely customer testimony), and our analysis of relevant precedent in horizontal merger challenges.
A. Strengths of the DOJ's Case
The DOJ's complaint presents a case with several substantial strengths that, taken together, create a formidable challenge for Halcyon. We assess the key elements of the government's case as follows:
1. Market Concentration and Structural Presumption. The 47% combined market share and the high HHI delta alleged by the DOJ create a strong structural presumption of anticompetitive effects under the framework established by United States v. Philadelphia National Bank, 374 U.S. 321 (1963), and its progeny. Under Philadelphia National Bank, where a merger produces a firm controlling an undue percentage of the relevant market and results in a significant increase in concentration, the transaction is presumed to be illegal, and the burden shifts to the defendants to produce evidence that the market share statistics give an "inaccurate account of the [merger's] probable effects on competition." This presumption remains a potent weapon in the DOJ's arsenal and has been consistently applied by courts, including in recent technology-sector merger challenges. A 47% combined share in a market with a post-merger HHI well in excess of 2,500 and a delta well in excess of 200 places this transaction squarely within the zone of presumptive illegality. Halcyon would bear a significant burden in attempting to rebut this presumption.
2. Close Competitor Evidence. Internal business documents — likely surfaced during the Second Request process from both Halcyon and Vectris — may show that each company identifies and tracks the other as its primary competitive threat in the silicon photonics transceiver market. Documents of this nature are among the most powerful pieces of evidence in merger litigation, as they reflect the contemporaneous views of the merging parties about the competitive landscape and are generally given significant weight by courts. If Halcyon's and Vectris's own strategic plans, competitive analysis presentations, and marketing materials identify each other as the closest competitor, particularly in next-generation co-packaged optics, this evidence would strongly support both the DOJ's narrow market definition and its unilateral effects theory.
3. Customer Testimony. Three of the top five U.S. hyperscale cloud operators are current Vectris customers, and the DOJ's complaint cites statements from hyperscale operators expressing concern about the loss of Vectris as an independent supplier. Customer opposition testimony is powerful evidence in DOJ merger challenges. Courts have consistently credited the testimony of sophisticated, large-volume customers regarding their views on the competitive effects of proposed mergers, and the involvement of major hyperscale operators — whose procurement decisions drive the market — lends particular weight to this evidence. The DOJ will likely present live testimony from senior procurement and engineering executives at these companies, and defending against such testimony is difficult, particularly when customers can articulate specific ways in which the loss of an independent Vectris would reduce their bargaining leverage and sourcing flexibility.
4. Narrow Market Definition Favorable to DOJ. The DOJ's proposed relevant product market — "silicon photonics transceiver modules for hyperscale data center interconnects" — is drawn narrowly to maximize the concentration numbers and the apparent competitive significance of the merger. If the court accepts this market definition, the structural case is very strong. As discussed below, Halcyon could argue for a broader market definition, but the DOJ's narrow definition is supported by the distinct performance characteristics of silicon photonics (bandwidth density, power efficiency, latency), the testimony of hyperscale customers that silicon photonics is not substitutable with legacy technologies, and the trend in recent case law toward accepting narrower, functionality-based market definitions in technology cases.
5. Current Judicial Environment. The current judicial environment is generally more receptive to DOJ merger challenges than it has been at various points in the past, particularly in the technology and semiconductor sectors. Recent decisions — including the successful DOJ challenge in United States v. Bertelsmann SE & Co. KGaA (D.D.C. 2022) and the FTC's victory in FTC v. Adriatic Enterprises, Inc. (N.D. Cal. 2023, preliminary injunction) — reflect a trend of courts giving significant weight to structural evidence and market concentration in evaluating merger challenges. The District of Columbia district court, where this case has been filed, has been a venue generally favorable to the government in antitrust merger cases, and the current bench includes several judges who have demonstrated receptivity to the DOJ's enforcement theories.
6. Barriers to Entry. The combination of extensive intellectual property requirements, significant capital investment, long qualification cycles with hyperscale customers (typically 18–24 months), and talent scarcity in photonics engineering creates a credible and well-documented set of barriers that make a viable entry or expansion defense extremely difficult for Halcyon to advance. To successfully rebut the structural presumption on entry grounds, Halcyon would need to demonstrate that entry by new competitors or expansion by existing fringe players would be timely (i.e., would occur within approximately two years), likely (i.e., would be economically rational and not merely speculative), and sufficient (i.e., would replace the competitive intensity lost through the merger). The DOJ's evidence on barriers makes all three prongs of this test difficult to satisfy.
B. Potential Halcyon Defenses and Their Weaknesses
Calderwood & Harkness has identified the following potential defenses that could be advanced on Halcyon's behalf. For each, we assess both its potential utility and its limitations.
1. Broader Market Definition. Halcyon could argue that the relevant product market should be defined more broadly to include all optical transceiver technologies — including pluggable transceivers (whether based on silicon photonics, indium phosphide, or other platforms), coherent optical modules, and potentially electrical copper interconnect alternatives — rather than the narrow "silicon photonics transceiver modules for hyperscale data center interconnects" market proposed by the DOJ. A broader market definition would significantly dilute the combined entity's market share and reduce the HHI delta, potentially bringing the transaction below the thresholds that trigger a structural presumption.
This is likely Halcyon's strongest available defense, but it faces significant obstacles. Courts have increasingly accepted narrow, functionality-based market definitions in technology cases, particularly where the evidence shows that customers view the products within the proposed market as distinct from alternatives. In this case, the DOJ is likely to present testimony from hyperscale cloud operators that silicon photonics transceivers are a "must-have" technology that cannot be replaced by legacy optical or electrical alternatives without significant performance degradation. Internal Halcyon and Vectris documents that analyze the silicon photonics market as a distinct competitive arena — separate from the broader optical transceiver market — would further undermine Halcyon's broader market argument. Moreover, the DOJ's narrow market definition is consistent with industry analyst reports and trade publications that routinely treat silicon photonics as a distinct product category.
2. Efficiencies Defense. Halcyon could argue that the combination of Halcyon's advanced semiconductor fabrication capabilities with Vectris's leading-edge photonics design IP would generate merger-specific efficiencies — including cost reductions in manufacturing, acceleration of next-generation product development, and improved customer service through vertical integration — that would be procompetitive and would offset any anticompetitive effects. Halcyon's internal synergy analysis projected annualized cost synergies of $55–65 million within 36 months, which could form the basis of an efficiencies presentation.
However, the efficiencies defense in merger cases is subject to exacting requirements. Under the DOJ/FTC Merger Guidelines and established case law, cognizable efficiencies must be merger-specific (i.e., not achievable through less anticompetitive means, such as licensing, joint ventures, or organic investment), verifiable (i.e., supported by concrete evidence rather than speculative projections), and sufficient in magnitude to offset the merger's likely anticompetitive effects. Courts have set a high bar for crediting efficiencies as a basis for approving a merger that would otherwise be presumptively anticompetitive, and in practice, the efficiencies defense has rarely been dispositive in a litigated merger challenge. The DOJ will argue that Halcyon's projected synergies are not merger-specific (because Halcyon could pursue licensing arrangements or organic development as alternatives), are speculative (because they depend on assumptions about integration that may not materialize), and are insufficient to outweigh the harm from eliminating a major competitor.
3. Rapid Technological Change / Dynamic Competition. Halcyon could argue that the silicon photonics market is characterized by rapid technological evolution, that current market shares are not predictive of future competitive conditions, and that dynamic competition will continue regardless of the merger. This argument draws on the rapid pace of innovation in semiconductor and photonics technologies, the emergence of new interconnect architectures, and the entry of well-capitalized semiconductor firms into the photonics space.
There is some judicial receptivity to this argument, particularly in cases involving fast-moving technology markets. However, the DOJ will counter — with considerable force — that the merger itself reduces the number of independent innovators in the market and thereby diminishes the very dynamism that Halcyon invokes. If the court accepts the DOJ's innovation effects theory, the dynamic competition argument could actually backfire, as it would highlight the importance of independent innovation competition that the merger would eliminate. Additionally, even in fast-moving markets, courts have been reluctant to disregard current market shares entirely, particularly where the merging parties are the two leading innovators.
4. Entry and Expansion. Halcyon could point to potential entrants in the silicon photonics transceiver market, including well-capitalized semiconductor companies that have announced intentions to develop photonics capabilities, university spin-offs and venture-backed startups in the photonics space, and existing optical transceiver companies that could expand into silicon photonics. If credible evidence of imminent entry were available, this could help offset the structural presumption.
As noted above, however, the DOJ's evidence on barriers to entry — including the extensive IP portfolios required, the capital investment necessary, the 18–24 month hyperscale customer qualification cycles, and the scarcity of photonics engineering talent — will be difficult to overcome. Entry must be shown to be timely, likely, and sufficient, and the weight of the evidence is likely to favor the DOJ on all three prongs. Potential entrants that are still in the early stages of technology development, that have not yet qualified with major hyperscale customers, or that lack the scale to meaningfully constrain the combined entity's pricing and output decisions will not satisfy the standard.
5. Flailing Firm / Weakened Competitor. Under the "flailing firm" or "weakened competitor" defense, a merging party may argue that the target is a financially distressed company whose competitive significance is declining, such that the merger would not result in a meaningful reduction in competition. This defense is not available in this case. Vectris is a profitable and growing company, with FY2022 EBITDA of $74 million and revenue of $312 million. There is no basis for arguing that Vectris is a failing or weakened competitor.
6. Remedy Proposal. Although the DOJ rejected Halcyon's initial divestiture proposal prior to filing the complaint, Halcyon could revisit the remedy question during litigation and propose a more comprehensive divestiture package or consent decree to the court. Courts retain discretion to approve negotiated remedies in merger cases, and a sufficiently robust divestiture — for example, one that includes a broader set of assets, intellectual property, and customer relationships — could potentially satisfy the DOJ or the court.
However, the DOJ's unwillingness to engage with the initial remedy proposal, and the speed with which it proceeded to file the complaint after receiving the proposal, suggests that the government views the competitive concerns as fundamental and not easily remedied through divestiture. Moreover, any divestiture broad enough to address the DOJ's concerns would likely also undermine the strategic rationale for the acquisition, as the most valuable assets being acquired — Vectris's photonics IP and customer relationships — are precisely the ones that would need to be divested or shared to resolve the competitive overlap. This creates a fundamental tension between remediation and deal value that limits the practical utility of the remedy approach.
C. Litigation Risk Assessment
Based on the foregoing analysis, Calderwood & Harkness's overall assessment is that the probability of Halcyon prevailing at trial is estimated at below 35%. This assessment reflects the following considerations:
The structural presumption arising from the 47% combined market share is the single most formidable obstacle Halcyon would face at trial. The HHI numbers are well above the thresholds that courts and the Merger Guidelines identify as raising a presumption of anticompetitive harm, and the burden on Halcyon to rebut this presumption is substantial. While defenses are available — particularly the broader market definition argument and the efficiencies defense — none is individually strong enough to provide confidence that Halcyon could overcome the presumption, and the cumulative effect of multiple defenses, while potentially greater than any single defense, is unlikely to shift the balance sufficiently in Halcyon's favor.
The anticipated customer testimony from hyperscale cloud operators is a particularly significant factor in our assessment. Customer opposition is among the most persuasive forms of evidence in merger challenges, and the involvement of three of the five largest U.S. hyperscale operators as Vectris customers — and as likely opponents of the transaction — presents a serious evidentiary challenge.
Our assessment also accounts for the possibility that a more expansive divestiture remedy could be offered during the course of the litigation, potentially as a negotiated resolution or as a proposed consent decree presented to the court. However, the DOJ's pre-suit rejection of the initial remedy proposal, combined with the practical challenges of constructing a broader divestiture that is commercially viable, competitively effective, and consistent with the transaction's strategic rationale, reduces the likelihood that this path would lead to clearance.
Finally, the parallel European Commission Phase II investigation (Case M.11247), with an estimated combined EEA share of approximately 38%, creates additional risk that even if Halcyon were to prevail in the U.S. litigation — an outcome we assess as unlikely — EC clearance might still not be obtained, or might require significant concessions in the form of commitments (remedies) to the European Commission. The dual-track regulatory challenge means that the overall probability of successfully completing the transaction is lower than the probability of prevailing in any single jurisdiction, as clearance in both the United States and the EU is required as a condition to closing under the Merger Agreement.
V. Estimated Litigation Costs and Timeline
A. Cost Estimate
Should Halcyon elect to defend the DOJ's complaint through trial, Calderwood & Harkness estimates that the total litigation costs would exceed $45 million. This estimate encompasses all major cost categories associated with the defense of a complex horizontal merger challenge in federal district court and is based on our experience in comparable matters.
The estimated breakdown of major cost categories is as follows:
Outside Counsel Fees. This estimate reflects the staffing and billing rates that would be required for a Calderwood & Harkness litigation team of the size and seniority necessary to defend a major merger challenge, including multiple partners, senior counsel, senior associates, and associates across the firm's Antitrust & Competition and Litigation practices, as well as support from our Washington, DC, and New York offices. The estimate assumes a contested trial lasting approximately two to three weeks, with substantial pre-trial briefing, motion practice, and post-trial submissions.
Economic Expert Witnesses. Merger challenges of this nature require the retention of multiple economic experts, including experts in market definition, competitive effects analysis (unilateral and coordinated), efficiencies quantification, and entry analysis. The expert costs include the fees of the testifying experts, their supporting teams of economists and research assistants, and the costs of developing economic models, data analysis, and expert reports. Given the complexity of the relevant market (silicon photonics transceivers) and the sophistication of the economic issues, the expert costs in this matter are likely to be at the higher end of the range.
E-discovery and Document Review. Halcyon's Second Request production is already underway, but trial-related discovery would expand the scope of document collection, processing, review, and production beyond the Second Request. The estimate includes the costs of e-discovery vendors, contract attorneys for document review, and technology-assisted review platforms. Given the volume of documents at issue — Halcyon's initial Second Request collection encompassed approximately 3.2 million documents — these costs are substantial.
Fact Witness Preparation and Depositions. This category includes the costs of preparing Halcyon witnesses for depositions and trial testimony, as well as the costs of taking depositions of DOJ witnesses, customer witnesses, and third-party witnesses. The costs also include travel and logistical expenses associated with deposition sessions across multiple locations.
Other Costs. This category encompasses travel expenses for attorneys and witnesses, hearing preparation costs (including the preparation of demonstrative exhibits, visual aids, and technology for trial presentation), the retention of local counsel in the District of Columbia, and miscellaneous litigation expenses.
Important Note: These cost estimates are for the U.S. litigation only and do not include the costs of the parallel European Commission Phase II investigation, including legal fees for Halcyon's Brussels-based regulatory counsel, economic consultants retained for the EC process, or the costs of any potential commitments proceedings before the European Commission. The combined cost of defending both proceedings simultaneously would be substantially higher.
B. Estimated Litigation Timeline
If Halcyon elects to defend the complaint, the DOJ will likely seek expedited trial scheduling, consistent with its standard practice in merger challenges. The DOJ typically moves for a scheduling order shortly after filing the complaint, seeking to set the case for trial within approximately six to nine months. Based on the typical pace of merger litigation in the D.D.C. and the likely scheduling requests of the parties, Calderwood & Harkness estimates the following timeline:
Relationship to Outside Date. The Outside Date under the Merger Agreement is March 10, 2024, subject to automatic extension to June 10, 2024 if antitrust approvals are the sole unsatisfied closing condition. A trial in Q2–Q3 2024 would likely fall within the extended Outside Date period. However, a post-trial decision is unlikely before Q3–Q4 2024, which would fall after the extended Outside Date. If either party exercises its termination right under Section 8.1(b) upon expiration of the extended Outside Date, the litigation could become moot. If neither party terminates, the litigation would continue, but the Merger Agreement would be in a state of uncertainty regarding its enforceability. An appeal to the D.C. Circuit, if necessary, would add an additional 12–18 months beyond the district court's decision, further exceeding any plausible extension of the Outside Date. In sum, even if Halcyon were to prevail at trial, the timeline for final judicial resolution — particularly if an appeal is involved — would likely extend well beyond the contractual deadlines for completion of the transaction.
C. Ongoing Costs During Litigation Period
In addition to the direct litigation costs described above, the prolonged pendency of the DOJ challenge would give rise to ongoing costs and financial exposures, including:
Financing Commitment Ticking Fee. The commitment letter with Meridian Atlantic Bank, N.A., for the $500 million senior secured term loan facility provides for a ticking fee of 20 basis points per annum on the undrawn commitment, commencing 90 days after the date of signing of the Merger Agreement. This ticking fee began accruing on November 8, 2023. The ticking fee represents an ongoing cost of approximately $1 million per year, or approximately $83,000 per month. While the ticking fee is modest in relation to the overall transaction value, it is a continuing cash outflow with no corresponding benefit during the litigation period.
Financial Advisory Fees. Ridgeline Partners LLC, Halcyon's financial advisor for the transaction, is entitled to a base advisory fee of $3.2 million (0.40% of deal value), which has likely been partially accrued based on work performed to date. In addition, a success fee of $800,000 (0.10% of deal value) is payable only upon closing of the transaction. The base advisory fee, to the extent already accrued, represents a sunk cost. Additional advisory fees may be incurred if Ridgeline Partners is asked to provide analysis in connection with the Board's evaluation of strategic options.
Operational Disruption and Management Distraction. Extended regulatory uncertainty imposes significant costs on both Halcyon and Vectris in the form of management distraction, delayed strategic planning, and employee uncertainty. Senior executives on both sides are required to devote substantial time to litigation preparation, witness preparation, and strategic decision-making related to the regulatory process, diverting attention from the day-to-day operation and long-term strategic development of their respective businesses.
Vectris Employee Attrition and Business Deterioration. Prolonged uncertainty regarding the future ownership of Vectris creates a meaningful risk of employee attrition, particularly among key engineering and technical personnel in the photonics design organization. The loss of such personnel — who are in high demand in the broader semiconductor industry — could materially diminish the value of Vectris as an acquisition target and undermine the strategic rationale for the transaction, even if the merger were ultimately approved. In addition, Vectris may experience deterioration in customer relationships and business performance if hyperscale operators perceive uncertainty about the company's future direction and begin qualifying alternative suppliers.
VI. Interaction with European Commission Phase II Investigation
As noted throughout this memorandum, the DOJ complaint does not stand in isolation. The European Commission opened a Phase II in-depth investigation into the proposed transaction on October 6, 2023 (Case M.11247 — Halcyon Semiconductor / Vectris Photonics), based on serious doubts as to the compatibility of the concentration with the internal market. The EC's concerns center on the overlap between Halcyon and Vectris in co-packaged optics chiplets sold to European cloud operators, where the combined EEA share is estimated at approximately 38%.
Phase II Timeline. The EC Phase II investigation typically runs for 90 working days from the date of opening, with the possibility of extension. Based on the opening date of October 6, 2023, and accounting for the EC's standard practice of stopping the clock during information requests, a Phase II decision is not expected before Q1 2024 at the earliest, and could be delayed further depending on the course of the investigation and any remedy discussions.
Separate Closing Condition. EC clearance is a separate and independent closing condition under the Merger Agreement. Even if Halcyon were to prevail in the U.S. litigation — an outcome we assess as unlikely — EC clearance would still be required before the transaction could be consummated. The parallel proceedings thus create a "dual-track" risk: success in one jurisdiction does not guarantee success in the other.
Different Market Definitions and Competitive Dynamics. The EC's competitive analysis is likely to differ from the DOJ's in certain respects, including with respect to geographic market definition (EEA vs. United States), the identity and market shares of competitors, and the relative significance of specific customers. The EC may also apply different analytical frameworks and policy priorities, including a greater emphasis on innovation competition and the "significant impediment to effective competition" ("SIEC") test under Article 2 of the EU Merger Regulation. These differences mean that a remedy package acceptable to the DOJ may not be acceptable to the EC, and vice versa. Constructing a single remedy that satisfies both regulators, while preserving the strategic value of the transaction, presents a significant practical challenge.
Implications for Strategic Decision-Making. The interplay between the U.S. and EU proceedings is a critical factor in the Board's evaluation of strategic options. Even in a scenario in which Halcyon were prepared to bear the cost and risk of defending the DOJ complaint, the independent risk of an adverse EC decision — and the separate cost and complexity of the EC process — must be factored into the overall assessment of the probability and desirability of completing the transaction.
VII. Strategic Options for the Board
Based on the foregoing analysis, Calderwood & Harkness has identified three principal strategic options for the Board's consideration. Each option is discussed below, together with an assessment of its advantages and disadvantages.
A. Option 1: Litigate Through Trial
Under this option, Halcyon would defend the DOJ complaint vigorously and proceed to trial, while continuing to engage with the European Commission in the Phase II investigation on a parallel track. Halcyon would assert all available defenses, including broader market definition, merger-specific efficiencies, dynamic competition, and entry/expansion arguments, and would seek to demonstrate to the court that the proposed merger would not substantially lessen competition.
Advantages:
• Preserves the possibility of completing the acquisition of Vectris and realizing the strategic benefits of the transaction.
• Approximately 35% probability of prevailing at trial in the U.S., though this probability is lower when combined with the independent risk of an adverse EC decision.
• If Halcyon were to prevail, the decision could establish favorable precedent for future transactions in the semiconductor and technology sectors.
• Demonstrates to the market and to potential future transaction counterparties that Halcyon is willing to defend its strategic investments against regulatory challenge.
Disadvantages:
• Litigation costs exceeding $45 million, with no guarantee of success.
• Significant management distraction for senior executives, diverting attention from core business operations and strategic priorities during a critical period for Halcyon's organic growth initiatives.
• Ongoing ticking fees on the Meridian Atlantic financing commitment (approximately $83,000 per month).
• Extended uncertainty for both Halcyon and Vectris employees, customers, and business partners.
• Risk of adverse precedent if the court rules against Halcyon, which could affect future M&A strategy.
• Risk of Vectris business deterioration during the prolonged litigation period, reducing the value of the acquisition target.
• Even a trial victory in the U.S. does not resolve the EC Phase II concerns, and the overall probability of clearing both jurisdictions is materially lower than the probability of prevailing in either jurisdiction alone.
• The litigation timeline likely extends beyond the extended Outside Date of June 10, 2024, creating contractual uncertainty regarding the enforceability of the Merger Agreement.
B. Option 2: Negotiate Further Remedies with DOJ and EC
Under this option, Halcyon would propose a more comprehensive divestiture package or behavioral remedies to the DOJ and the EC, seeking to negotiate a consent decree or set of commitments that would permit the transaction to proceed with conditions.
Advantages:
• Could potentially resolve both U.S. and EU competitive concerns witho