PRIVILEGED AND CONFIDENTIAL — ATTORNEY WORK PRODUCT

PRIVILEGED AND CONFIDENTIAL — ATTORNEY WORK PRODUCT
MEMORANDUM
TO: Elaine Forsythe, Responsible Partner, Antitrust & Competition, Calderwood & Harkness LLP
FROM: Aaron Liu, Lead Associate; Monica Reyes, Working Associate
CC: Howard Bellamy, Billing Partner
DATE: November 1, 2022
RE: Market Definition Strategy — Ridgepoint Communications Inc. v. Northgate Networks America Inc. et al., Case No. 1:22-cv-01487-CMW (E.D. Va.)
ENGAGEMENT REF: C&H-2022-ATR-00419
PRIVILEGE DESIGNATION: This memorandum constitutes attorney work product prepared in anticipation of litigation and is protected by the work product doctrine and the attorney-client privilege. It also contains information subject to the attorney-client privilege. Do not distribute outside the defense team without prior authorization from the Responsible Partner.
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I. Executive Summary
The purpose of this memorandum is to analyze the relevant product market and geographic market definitions advanced by Ridgepoint Communications Inc. ("Ridgepoint") in its complaint filed September 19, 2022, to evaluate the strengths and weaknesses of those definitions, and to develop Northgate Networks America Inc.'s ("Northgate" or the "Company") counter-arguments in support of a broader market definition that more accurately reflects competitive conditions in the enterprise telecommunications sector within the Philadelphia–Baltimore–Washington, D.C. metropolitan corridor. This memorandum is intended to guide the defense team's strategy on the market definition issue across all pending and anticipated proceedings, including the district court litigation and the FCC administrative proceeding.
The Core Dispute. Ridgepoint defines the relevant product market as "last-mile enterprise fiber-optic transport services" — encompassing both lit and dark fiber — at speeds of 1 Gbps and above, sold to enterprise and government customers, within the Philadelphia–Baltimore–Washington, D.C. metropolitan corridor. Ridgepoint's retained economic expert, Dr. Leonard Kuo of Cavendish University, has preliminarily opined that Northgate holds a 68% share of this narrowly defined market. If credited, this market share figure would create a strong inference of monopoly power under prevailing Section 2 case law and would place Ridgepoint's monopolization claim on favorable footing at every stage of the litigation.
Northgate's Position. The market definition advanced by Ridgepoint is artificially narrow and systematically excludes competitive alternatives that enterprise customers in the corridor actually use, consider, and switch to. Properly defined, the relevant product market includes not only dedicated fiber-optic transport but also (1) cable broadband services utilizing DOCSIS 3.1 and later technologies capable of delivering 1 Gbps and above to enterprise customers, (2) fixed wireless access ("FWA") services, including 5G-based enterprise offerings now being deployed across the corridor's major metropolitan areas, and (3) wholesale ethernet services delivered over non-fiber infrastructure (including ethernet-over-copper and ethernet-over-coax) that meet enterprise speed, latency, and reliability requirements. Under a properly defined market incorporating these reasonably interchangeable substitutes, Northgate's market share falls to approximately 31% — well below the threshold at which courts infer monopoly power.
Strategic Importance. The market definition dispute is central to the viability of Ridgepoint's Section 2 claim in the district court action and will also bear significantly on the FCC proceeding (Docket WC-23-0042) before Administrative Law Judge Robert Fenwick. The positions taken in each forum must be carefully coordinated to maintain consistency and avoid judicial estoppel or impeachment risks. The defense team must work closely with Dr. Priya Narasimhan of Ellsworth Economic Consulting LLC to develop rigorous economic support — including a hypothetical monopolist test (SSNIP analysis) — demonstrating that Ridgepoint's fiber-only product market definition does not withstand scrutiny.
Recommendation. We recommend that Northgate pursue the broader market definition at every available stage of the litigation: (a) in support of the motion to dismiss already filed on November 14, 2022, arguing that Ridgepoint's narrow market definition is facially implausible; (b) in the FCC proceeding, through competitive landscape evidence and expert testimony; and (c) at summary judgment (if and when the stay is lifted and the case proceeds), supported by Dr. Narasimhan's full expert analysis. We further recommend that Ellsworth Economic Consulting be directed to conduct a comprehensive SSNIP analysis supporting the inclusion of cable, FWA, and wholesale ethernet in the relevant product market, and that the defense team promptly begin assembling the proprietary and public data necessary to support that analysis.
II. Background and Procedural Context
A. The Parties
1. Northgate Telecommunications PLC and Northgate Networks America Inc.
Northgate Telecommunications PLC ("Northgate PLC") is a public limited company organized under the laws of England and Wales (Company No. 07824561). Its American Depositary Receipts ("ADRs") are listed on the Nasdaq Global Select Market under the ticker symbol "NTP." As of September 2022, Northgate PLC's market capitalization was approximately $11.3 billion. For the fiscal year ended March 31, 2022 ("FY 2022"), Northgate PLC reported consolidated revenue of £4.87 billion (approximately $5.96 billion at the prevailing average exchange rate of $1.2236/£).
In the United States, Northgate PLC operates principally through its wholly owned subsidiary, Northgate Networks America Inc. ("Northgate" or "NNA"), a Delaware corporation headquartered at 8200 Dulles Corner Boulevard, Suite 1100, Tysons Corner, Virginia 22182. Northgate owns and operates approximately 42,000 route-miles of fiber-optic backbone and metro-ring infrastructure across 18 U.S. states, with a particular concentration along the eastern seaboard. The Company's U.S. operations also encompass enterprise cloud-connectivity solutions and its proprietary SaaS-based network management platform, NorthgateOS™, which provides enterprise customers with real-time monitoring, provisioning, and traffic-management capabilities. For FY 2022, Northgate's U.S. revenue was approximately $2.41 billion, representing approximately 40.4% of Northgate PLC's consolidated revenue.
2. Ridgepoint Communications Inc.
Ridgepoint Communications Inc. ("Ridgepoint") is a Delaware corporation headquartered at 3500 Market Street, Suite 700, Philadelphia, Pennsylvania 19104. Ridgepoint operates as a competitive local exchange carrier ("CLEC") and enterprise broadband provider in Pennsylvania, New Jersey, Delaware, Maryland, and Virginia. The company owns and leases approximately 6,200 route-miles of fiber-optic infrastructure and reported FY 2022 revenue of approximately $387 million. Ridgepoint employs approximately 1,450 individuals across its service territory.
Ridgepoint is privately held. A 78% equity interest is held by Caravel Capital Partners LP, a Philadelphia-based private equity fund (Managing Partner: Richard Cavanaugh), which acquired its controlling stake through a leveraged buyout completed in November 2018, valuing the company at approximately $510 million. The remaining 22% equity interest is retained by the Trent family, including CEO and founder Gregory Trent, who continues to serve as the company's chief executive.
Ridgepoint is represented in this matter by the law firm of Hargrove, Winslow & Burke LLP. Lead Partner Victoria Hargrove and Senior Associate Daniel Stoyanov are the primary attorneys handling the case. We understand that Hargrove, Winslow & Burke has been retained on a partial contingency basis, consisting of a reduced hourly rate plus 20% of any recovery. This fee arrangement is relevant to our assessment of Ridgepoint's litigation posture: the contingency structure provides Ridgepoint's counsel with a strong financial incentive to pursue the case aggressively and to resist early settlement, while also suggesting that Ridgepoint itself may have limited resources to fund protracted litigation at full hourly rates.
B. The Complaint and Alleged Conduct
Ridgepoint filed its complaint on September 19, 2022, asserting a single count of monopolization under Section 2 of the Sherman Act, 15 U.S.C. § 2. The gravamen of the complaint is Northgate's alleged refusal to provide interconnection and physical colocation access at fourteen specific Northgate central-office and meet-me-room facilities located within the Philadelphia–Baltimore–Washington, D.C. metropolitan corridor. Ridgepoint contends that Northgate's control of these facilities, combined with its dominant share of last-mile enterprise fiber-optic transport in the corridor, constitutes the willful maintenance of monopoly power through exclusionary conduct.
The fourteen facilities identified in the complaint are located at the following addresses:
1.  401 N. Broad Street, Philadelphia, PA
2.  1500 Spring Garden Street, Philadelphia, PA
3.  100 Delancey Place, Cherry Hill, NJ
4.  220 S. Warren Street, Trenton, NJ
5.  700 E. Pratt Street, Baltimore, MD
6.  1 W. Fayette Street, Baltimore, MD
7.  33 S. Gay Street, Baltimore, MD
8.  9221 Corporate Boulevard, Rockville, MD
9.  1200 New Hampshire Avenue NW, Washington, D.C.
10.  600 New Jersey Avenue NW, Washington, D.C.
11.  44755 Prentice Drive, Ashburn, VA
12.  21571 Beaumeade Circle, Ashburn, VA
13.  1807 Michael Faraday Court, Reston, VA
14.  8100 Boone Boulevard, Tysons Corner, VA
According to the complaint, between March 2021 and August 2022, Ridgepoint submitted formal interconnection and colocation requests to Northgate for access at each of these fourteen facilities. Northgate denied all of these requests. In its formal responses to Ridgepoint, Northgate cited three principal justifications for the denials:
(a) Capacity constraints. Northgate represented that utilization at the fourteen facilities was at or above 85%, leaving insufficient space to accommodate third-party colocation without compromising existing customer operations and service reliability.
(b) Absence of prior course of dealing. Northgate noted that it had no prior interconnection or colocation arrangement with Ridgepoint at any of the fourteen specific locations at issue. Northgate's position is that the absence of an existing relationship at these facilities weighs against an obligation to provide access.
(c) Wholesale Access Policy (WAP). In January 2020, Northgate adopted a Wholesale Access Policy establishing minimum eligibility criteria for third-party physical colocation at Northgate facilities. Among other requirements, the WAP mandates a minimum annual revenue commitment of $5 million from any third-party carrier seeking physical colocation. Ridgepoint's aggregate annual spend with Northgate was approximately $1.8 million in FY 2021, well below the $5 million WAP threshold.
It bears noting that the parties do have a limited historical colocation relationship. Under a prior Master Interconnection Agreement ("MIA"), effective June 15, 2015 through June 14, 2020, Northgate granted Ridgepoint colocation access at three northern Virginia facilities (not among the fourteen at issue in this case). Following the expiration of the MIA, Ridgepoint has continued to occupy these three existing colocation spaces under a month-to-month holdover arrangement. Under the holdover terms, Ridgepoint pays 120% of the rate established under the expired MIA — $14,400 per month per facility versus the prior contract rate of $12,000 per month per facility, representing a holdover premium of $2,400 per month per facility, or an aggregate holdover premium of $7,200 per month ($86,400 per year across the three locations). The existence of this holdover arrangement, while not directly at issue in the complaint, provides important context regarding the parties' commercial relationship and Northgate's general willingness to provide colocation access on commercially reasonable terms.
C. Damages Exposure
Ridgepoint's complaint seeks damages for alleged lost profits over a six-year projection period (2022–2027), quantified at $127 million before trebling. Under Section 4 of the Clayton Act, 15 U.S.C. § 15, successful antitrust plaintiffs are entitled to treble damages, which would bring Ridgepoint's claimed damages to $381 million.
Dr. Narasimhan has conducted a preliminary review of Ridgepoint's damages theory and, based on available information, has estimated that provable lost profits — even assuming liability — would fall in the range of $18 million to $24 million before trebling. The substantial gap between Ridgepoint's claimed damages ($127 million pre-trebling) and Dr. Narasimhan's preliminary estimate ($18–$24 million pre-trebling) underscores the speculative nature of Ridgepoint's projections, which appear to assume unrealistic market penetration rates and revenue growth in the absence of colocation access at the fourteen disputed facilities.
However, as a strategic matter, the damages question is secondary to the market definition issue. Market definition is a gateway question in any Section 2 case: if Northgate prevails in establishing a broader relevant market in which its share falls to approximately 31%, the monopoly power element of Ridgepoint's Section 2 claim fails as a matter of law, and the damages question becomes entirely moot. For this reason, the market definition strategy set forth in this memorandum should be understood as the defense team's primary line of defense.
D. Procedural Status
The following is a summary of key procedural developments and upcoming milestones:
Motion to Dismiss. On November 14, 2022, Northgate filed a motion to dismiss the complaint under Federal Rule of Civil Procedure 12(b)(6). The motion argues, among other grounds, that Ridgepoint's proposed relevant market definition is implausible on its face and that the complaint therefore fails to state a claim for monopolization under Section 2. The market definition arguments set forth in the motion to dismiss are consistent with the broader market definition strategy described in this memorandum.
Stay of District Court Proceedings. On March 14, 2023, Judge Claudia M. Wentworth of the U.S. District Court for the Eastern District of Virginia entered an order staying the district court proceedings pending resolution of the FCC administrative proceeding in Docket WC-23-0042. In connection with the stay order, Judge Wentworth denied Northgate's motion to dismiss without prejudice to its renewal after the stay is lifted. The court's order expressly preserved Northgate's right to re-file the motion to dismiss or to incorporate the market definition arguments into a motion for summary judgment at the appropriate time.
FCC Proceeding. The FCC complaint (Docket WC-23-0042) is pending before Administrative Law Judge Robert Fenwick. The FCC proceeding focuses on Sections 251 and 252 of the Communications Act rather than on Sherman Act market definition, but competitive landscape evidence will be relevant to the regulatory analysis, and positions taken before the FCC must be carefully coordinated with positions taken in the district court. The evidentiary hearing in the FCC proceeding was originally scheduled for September 2023 but has been postponed to January 22–24, 2024. Post-hearing briefs are due March 15, 2024, with reply briefs due April 12, 2024.
III. Ridgepoint's Proposed Relevant Market
A. Product Market: "Last-Mile Enterprise Fiber-Optic Transport Services"
Ridgepoint defines the relevant product market as "last-mile enterprise fiber-optic transport services," encompassing both lit fiber and dark fiber connections, at speeds of 1 Gbps and above, sold to enterprise and government customers. This definition is central to Ridgepoint's complaint and forms the foundation for Dr. Kuo's market share calculations and monopoly power analysis.
Ridgepoint's product market definition emphasizes the following specific characteristics that it contends distinguish fiber-optic enterprise transport from other forms of enterprise connectivity:
(1) Dedicated fiber-optic connections. Ridgepoint contends that the relevant market is limited to dedicated, point-to-point fiber-optic connections — as opposed to shared, best-effort services — because enterprise and government customers with mission-critical connectivity requirements demand the reliability, security, and performance guarantees that only dedicated fiber can provide. According to Ridgepoint, shared broadband services, regardless of the speed tier offered, are not viable substitutes for dedicated fiber because they lack guaranteed bandwidth, enforceable service-level agreements ("SLAs"), and the physical-layer security inherent in a dedicated fiber strand.
(2) Minimum speed threshold of 1 Gbps. Ridgepoint draws the market boundary at connections delivering 1 Gbps and above, arguing that enterprise customers with high-bandwidth requirements occupy a distinct market from small-business or residential customers who may be adequately served by lower-speed connections. This speed threshold is intended to capture the segment of the market in which Northgate is most heavily concentrated.
(3) Service to enterprise and government customers. Ridgepoint excludes residential broadband from the relevant market, arguing that enterprise and government customers have materially different needs — including dedicated SLAs, 24/7 network operations center support, managed router configurations, and multi-site network design — that distinguish enterprise connectivity from mass-market consumer broadband.
(4) Last-mile segment. Ridgepoint's product market definition is limited to the "last-mile" segment of enterprise connectivity — that is, the physical connection from the carrier's point of presence ("PoP") or central office to the end-user premises. Ridgepoint argues that last-mile connectivity is a distinct bottleneck because, unlike long-haul transport, it requires physical infrastructure (fiber strands, conduit, access rights) that reaches individual buildings and cannot be replicated at scale by competitors without enormous capital expenditure and extended construction timelines.
Dr. Kuo's Rationale. In his preliminary expert report, Dr. Leonard Kuo opines that the fiber-only product market definition is supported by the application of the hypothetical monopolist test (also known as the SSNIP test — "small but significant and non-transitory increase in price"). Specifically, Dr. Kuo argues that enterprise customers with high-bandwidth, low-latency requirements cannot and would not substitute cable broadband, fixed wireless access, or other non-fiber technologies for dedicated fiber-optic transport, even in response to a 5–10% price increase imposed by a hypothetical monopolist of fiber-only services. According to Dr. Kuo, price sensitivity analysis based on publicly available data and Ridgepoint's internal market intelligence demonstrates that enterprise fiber customers exhibit very low price elasticity of demand and that the relevant cross-elasticity of demand between fiber and non-fiber alternatives is negligible.
Dr. Kuo argues that enterprise customers' reluctance to switch away from fiber is driven by several factors: (i) the performance characteristics of fiber (low latency, high reliability, symmetrical upload/download speeds) are not fully replicated by alternative technologies; (ii) enterprise customers who have invested in fiber-compatible premises equipment face switching costs; (iii) contractual obligations, including multi-year service agreements with significant early-termination fees, create lock-in effects; and (iv) enterprise IT procurement processes are inherently conservative and resistant to technology changes that introduce perceived risk.
Dr. Kuo's Background. Dr. Kuo is a tenured professor of economics at Cavendish University, where he specializes in industrial organization with a particular focus on telecommunications markets. He has published extensively on network economics and has been retained as an economic expert in several prior telecommunications antitrust matters, including at least two FCC proceedings involving broadband competition. While Dr. Kuo is a credible academic with relevant expertise, his prior work has consistently favored narrow market definitions in telecommunications cases, a tendency that we intend to highlight in any Daubert challenge. We are currently conducting a comprehensive review of Dr. Kuo's prior testimony and publications to identify inconsistencies or vulnerabilities that may be useful in cross-examination or rebuttal.
B. Geographic Market: Philadelphia–Baltimore–Washington, D.C. Corridor
Ridgepoint defines the relevant geographic market as the Philadelphia–Baltimore–Washington, D.C. metropolitan corridor, encompassing portions of Pennsylvania, New Jersey, Delaware, Maryland, Virginia, and the District of Columbia. This geographic definition is tailored to the area in which Ridgepoint operates and in which the fourteen disputed Northgate facilities are located.
Ridgepoint's geographic market theory rests on two principal premises:
First, enterprise customers in this corridor require local last-mile connections and cannot substitute connections from carriers serving other geographic regions. An enterprise customer in Philadelphia cannot obtain last-mile connectivity from a provider whose fiber infrastructure is located only in Boston or Chicago; last-mile transport is, by definition, a locally delivered service. This demand-side constraint means that the relevant geographic market cannot extend beyond the corridor itself.
Second, Ridgepoint contends that the Philadelphia–Baltimore–Washington, D.C. corridor has a distinct competitive landscape characterized by Northgate's dominant fiber-optic backbone and metro-ring infrastructure. Ridgepoint argues that Northgate's concentration of fiber assets in this corridor — particularly its control of key meet-me-room and central-office facilities — creates a unique competitive dynamic that does not exist in other regions where Northgate's presence is less dominant.
Dr. Kuo's Supporting Analysis. Dr. Kuo's preliminary report includes a geographic market analysis that emphasizes the inherently local character of demand-side substitution for enterprise connectivity. As Dr. Kuo explains, an enterprise customer in Philadelphia cannot substitute service from a carrier whose last-mile infrastructure is located only in Washington, D.C., any more than a consumer of groceries in Philadelphia could substitute a grocery store in Baltimore. The geographic scope of the market, in Dr. Kuo's analysis, is therefore determined by the physical reach of competing carriers' last-mile networks, and the corridor definition captures the relevant area in which Northgate's 14 disputed facilities are located and in which Ridgepoint seeks to compete.
C. Market Share under Ridgepoint's Definition
Dr. Kuo's preliminary calculation places Northgate's share of the relevant market — as Ridgepoint defines it — at 68% of enterprise fiber-optic last-mile connections at 1 Gbps and above in the Philadelphia–Baltimore–Washington, D.C. corridor. This figure, if credited by the trier of fact, would place Northgate well within the range at which courts have historically found monopoly power under Section 2 of the Sherman Act. Courts have generally held that market shares above 60–70%, sustained over time, give rise to an inference of monopoly power. See, e.g., Calderon Industries v. Image Tech. Servs., Inc., 504 U.S. 451, 481 (1992) (noting that a market share above 65% can establish a prima facie case of monopoly power); United States v. Grinnell Corp., 384 U.S. 563, 571 (1966) (finding monopoly power where defendant held 87% of the market).
Dr. Kuo's methodology for calculating this market share relies on a combination of data sources:
•  FCC Form 477 filings: Dr. Kuo uses data from FCC Form 477 broadband deployment reports to estimate the number of fiber connections at the census-tract level within the corridor. Form 477 data provides information on the number of connections by speed tier and technology, allowing Dr. Kuo to isolate fiber connections at 1 Gbps and above.
•  Industry surveys: Dr. Kuo supplements the FCC data with industry surveys from organizations such as the Fiber Broadband Association and Drayton Advisors, which publish market share estimates for enterprise fiber services by provider and region.
•  Ridgepoint's internal competitive intelligence: Dr. Kuo also relies on competitive intelligence data maintained by Ridgepoint, including building-level data on carrier presence and market share estimates compiled by Ridgepoint's sales and marketing teams.
The implications of Dr. Kuo's market share calculation are significant. A 68% market share, if accepted, would create a strong — potentially dispositive — inference of monopoly power. It would shift the burden to Northgate to demonstrate that, notwithstanding its high market share, it lacks the ability to control prices or exclude competition. While market share alone is not conclusive evidence of monopoly power, and while the defense can point to other indicia of competitive conditions (such as ease of entry, buyer power, and market dynamism), a 68% share would place Northgate in a difficult position at summary judgment and trial absent a successful challenge to the market definition itself.
This is precisely why the market definition issue is the fulcrum of the case: if the relevant market is defined more broadly to include cable, FWA, and wholesale ethernet — as we argue it should be — Northgate's share falls to approximately 31%, and the monopoly power element of Ridgepoint's claim collapses.
IV. Northgate's Counter-Arguments on Product Market Definition
A. The Market Is Overbroad in One Dimension and Artificially Narrow in Another
Ridgepoint's proposed product market suffers from a fundamental analytical deficiency: it systematically excludes reasonably interchangeable substitutes that enterprise customers in the corridor actually use, actively consider, and demonstrably switch to when making connectivity procurement decisions. While Ridgepoint correctly recognizes that the relevant market should be limited to enterprise-grade connectivity at 1 Gbps and above (a sensible demand-side constraint), it erroneously limits the market to fiber-optic transport only, as though the underlying transmission medium — rather than the service characteristics that enterprise customers actually value (speed, latency, reliability, and uptime) — is the determinative feature of the product.
This approach is at odds with settled principles of antitrust market definition. The Supreme Court has long held that the relevant product market must include all products or services that are "reasonably interchangeable by consumers for the same purposes." United States v. E.I. du Pont de Nemours & Co., 351 U.S. 377, 395 (1956). The question is not whether the underlying technology is identical, but whether consumers view the alternatives as substitutes — that is, whether a sufficient number of customers would switch from fiber to an alternative technology in response to a price increase to make that price increase unprofitable.
Ridgepoint's fiber-only market definition excludes three categories of competitive alternatives that are demonstrably interchangeable with dedicated fiber-optic transport for a significant number of enterprise customers in the corridor:
(1) Cable broadband services utilizing DOCSIS 3.1 and later technologies, which now enable cable operators to deliver symmetrical multi-gigabit speeds to enterprise customers;
(2) Fixed wireless access (FWA) services, including 5G-based enterprise offerings, which are being deployed at scale across the corridor's major metropolitan areas and can deliver 1 Gbps and above to enterprise premises; and
(3) Wholesale ethernet services provided by cable operators, incumbent local exchange carriers ("ILECs"), and other carriers over non-fiber infrastructure, including ethernet-over-copper ("EoC") and ethernet-over-coax, which deliver enterprise-grade ethernet connectivity at 1 Gbps speeds.
Each of these categories of substitutes is discussed in detail below.
B. Cable Broadband as a Substitute
Technological Developments. The cable industry's deployment of DOCSIS 3.1 technology — and the emerging DOCSIS 4.0 standard — has fundamentally transformed cable operators' ability to serve enterprise customers with high-speed, reliable connectivity. DOCSIS 3.1 enables downstream speeds of up to 10 Gbps and upstream speeds of up to 1–2 Gbps over hybrid fiber-coaxial ("HFC") networks. Major cable operators, including Northpoint Enterprises, Charter Pemberton & Co., and Harborline Industries, have deployed DOCSIS 3.1 across their footprints and are actively marketing enterprise-grade services at 1 Gbps and above. Northpoint Enterprises, in particular, has invested heavily in its enterprise service offerings in the Mid-Atlantic corridor, including dedicated internet access, software-defined wide area networking ("SD-WAN"), and managed network services with enterprise-grade SLAs.
Evidence of Enterprise Adoption. Industry data demonstrates a growing trend of enterprise customers adopting cable-delivered high-speed broadband for both primary and backup connectivity. According to a 2022 report by Drayton Advisors, cable operators' share of the U.S. enterprise ethernet market has grown from approximately 8% in 2018 to approximately 16% in 2022, with the most significant gains occurring in metropolitan areas where cable operators have upgraded to DOCSIS 3.1. A 2022 Fenmore Consulting Group survey of enterprise IT procurement decision-makers found that 34% of respondents had considered cable broadband as an alternative to dedicated fiber when procuring new connectivity services, and 18% had actually switched at least one connection from fiber to cable in the preceding 24 months.
This evidence of actual switching behavior is particularly significant because it goes beyond theoretical substitutability and demonstrates that enterprise customers are, in practice, treating cable services as interchangeable with fiber for at least some applications. Under the case law, evidence of actual customer switching — as opposed to merely hypothetical substitutability — is among the strongest forms of evidence supporting a broader market definition.
Pricing Dynamics. Cable enterprise offerings are typically priced at a 20–40% discount to comparable fiber services for equivalent speed tiers. This pricing differential exerts significant competitive pressure on fiber providers, including Northgate. Internal Northgate sales data (which we will need to obtain from the client to support Dr. Narasimhan's analysis) may reveal instances in which Northgate has reduced pricing or offered discounts in response to cable competition in the corridor. Such evidence of competitive pricing responses would powerfully support the inclusion of cable in the relevant product market.
Next Steps. We recommend coordinating with Dr. Narasimhan to quantify cable enterprise market penetration in the Philadelphia–Baltimore–Washington, D.C. corridor specifically, drawing on publicly available FCC data, cable operator filings, and any proprietary data that can be obtained through Northgate's competitive intelligence or through targeted discovery. Dr. Narasimhan should be asked to model the extent to which cable competition constrains Northgate's pricing power in the corridor and to assess whether the inclusion of cable services in the relevant market would cause the SSNIP test to fail (i.e., would a hypothetical monopolist of fiber-only services be unable to profitably raise prices by 5–10% because of customer switching to cable).
C. Fixed Wireless Access (FWA) as a Substitute
5G FWA Services. The deployment of 5G fixed wireless access represents a significant and rapidly growing competitive alternative to fiber-optic enterprise transport. Multiple national carriers — including Harborline & Co., Ashgrove & Co., and Camberwell Enterprises — are deploying 5G FWA services capable of delivering 1 Gbps and above to enterprise premises, particularly in the dense urban and suburban areas within the Philadelphia–Baltimore–Washington, D.C. corridor. Harborline & Co.'s enterprise FWA offering, for example, is marketed as delivering speeds of up to 1.5 Gbps with latency comparable to fiber in areas with adequate millimeter-wave or C-band coverage. Ashgrove & Co.'s 5G Business Internet product offers similar performance characteristics.
Growth Trajectory. The growth of FWA connections has been rapid. According to FCC data and carrier disclosures, the number of FWA subscribers in the United States grew by approximately 80% year-over-year in 2022, with particularly strong adoption in metropolitan areas where 5G coverage is most extensive. While the enterprise segment of FWA is still in its early stages relative to fiber, the trajectory is unmistakable: carriers are investing billions of dollars in 5G infrastructure and are aggressively targeting enterprise customers as a key growth segment. By 2024, industry analysts project that FWA will account for a meaningful share of enterprise connectivity in major metropolitan corridors, including the Mid-Atlantic.
Enterprise Use Cases. While Ridgepoint may argue that FWA is suitable only for backup or secondary connectivity and not as a substitute for primary fiber transport, this characterization understates FWA's current capabilities and future trajectory. FWA is increasingly being deployed as primary connectivity for enterprise locations that do not require the absolute lowest latency (such as financial trading floors), and it is unquestionably a viable primary service for the vast majority of enterprise applications, including cloud computing, video conferencing, data backup, and general internet access. Moreover, even if FWA is used primarily as backup connectivity, its availability constrains the pricing power of fiber providers because enterprise customers with FWA backup are less dependent on any single fiber provider and are therefore more willing to switch or negotiate lower prices.
Analytical Framework. Dr. Narasimhan should be directed to model the competitive constraint imposed by FWA on fiber-only enterprise transport using available pricing data, carrier coverage maps, and any evidence of customer switching behavior (including competitive win/loss reports from Northgate and customer procurement data showing FWA as an evaluated alternative in enterprise RFPs). The analysis should account for the growth trajectory of FWA and project its competitive significance over the damages period claimed by Ridgepoint (2022–2027).
D. Wholesale Ethernet Services as a Substitute
Non-Fiber-Based Ethernet. Enterprise ethernet services are increasingly technology-agnostic. Enterprise customers procure ethernet connectivity based on speed, latency, uptime, and SLA terms — not based on the underlying transmission medium. Ethernet-over-copper ("EoC") technology, utilizing bonded copper pairs, can deliver speeds of up to 1 Gbps to enterprise premises within approximately 3,000 feet of a carrier's serving node. Ethernet-over-coax services, leveraging cable operators' HFC plant, can similarly deliver 1 Gbps ethernet to enterprise locations.
These non-fiber ethernet services are available from multiple providers in the corridor who do not rely on Northgate's fiber infrastructure and are therefore not dependent on Northgate for any critical input. Providers of wholesale and retail ethernet services in the corridor include, among others, Crestline Industries (through its Kinetic Business unit), Westvale Industries, Ostrander Industries (through its legacy Kestrel Holdings enterprise business), and several cable operators offering ethernet over their HFC networks.
Enterprise Customer Perspective. The critical point for market definition purposes is that enterprise customers increasingly view ethernet as a technology-neutral service. When an enterprise customer issues an RFP for 1 Gbps ethernet connectivity at a particular location, it does not typically specify fiber as the required transmission medium; rather, it specifies the performance characteristics (speed, latency, uptime, SLA) and evaluates proposals from multiple carriers, some of which may offer fiber and others of which may offer copper- or coax-based ethernet. From the customer's perspective, these alternatives are functionally interchangeable — the customer cares about the service delivered, not the physical medium over which it is delivered.
This demand-side indifference to the underlying technology is precisely the type of evidence that supports inclusion of wholesale ethernet in the relevant product market. See FTC v. Sysco Corp., 113 F. Supp. 3d 1, 33–34 (D.D.C. 2015) (emphasizing functional interchangeability from the customer's perspective as the touchstone of product market definition).
E. Implications for Market Share
The inclusion of cable broadband, FWA, and wholesale ethernet services in the relevant product market has dramatic implications for the market share calculation. Based on preliminary estimates, Northgate's share of the broader market — defined as enterprise high-speed transport services (fiber, cable, FWA, and wholesale ethernet) at 1 Gbps and above — is approximately 31%. This estimate is based on publicly available data from FCC filings, industry reports, and carrier disclosures, and will be refined by Dr. Narasimhan as proprietary data becomes available.
At a 31% market share, Northgate falls well below the threshold at which courts have inferred monopoly power under Section 2. Courts have consistently held that market shares below 50% are generally insufficient to establish monopoly power absent other compelling evidence of market control. See Severin Corporation v. Berwick Bay Real Estate Partners, 748 F.2d 937, 940 (5th Cir. 1984) (finding 32% share insufficient to establish monopoly power); Tops Mkts., Inc. v. Quality Mkts., Inc., 142 F.3d 90, 99 (2d Cir. 1998) (shares below 50% "rarely, if ever" support a finding of monopoly power). At 31%, Northgate's position is that of a significant competitor in a vigorously competitive market — not a monopolist.
We recommend coordinating with Ellsworth Economic Consulting to conduct a rigorous SSNIP analysis demonstrating that a hypothetical monopolist of fiber-only last-mile enterprise transport services in the corridor could not profitably impose a 5–10% price increase because a sufficient number of customers would switch to cable, FWA, or wholesale ethernet to render the price increase unprofitable. This analysis is the gold standard for market definition under the Horizontal Merger Guidelines and the case law, and a well-supported SSNIP analysis demonstrating the failure of the fiber-only market would be dispositive on the market definition issue.
V. Northgate's Counter-Arguments on Geographic Market Definition
A. The Corridor Market May Be Too Broad
While our primary strategic focus is on the product market definition, Ridgepoint's geographic market definition — the Philadelphia–Baltimore–Washington, D.C. corridor as a single geographic market — is also vulnerable to challenge. Competitive conditions within the corridor are not uniform; they vary significantly across metropolitan sub-markets. For example:
•  The Ashburn, Virginia data center cluster is one of the most competitive enterprise connectivity markets in the world, with dozens of carrier-neutral data centers and numerous fiber, cable, and wireless providers competing aggressively for enterprise business. Northgate's competitive position in Ashburn is materially weaker than Ridgepoint's corridor-wide share analysis would suggest.
•  Downtown Philadelphia is served by multiple CLEC and ILEC fiber providers, as well as Northpoint Enterprises (whose headquarters are in Philadelphia and whose enterprise fiber and cable offerings are particularly strong in the Philadelphia metro area).
•  Baltimore, by contrast, may have fewer competitive alternatives, and Northgate's position may be stronger in certain Baltimore-area sub-markets.
If the geographic market is properly segmented by metropolitan sub-market, Northgate's share varies substantially across those sub-markets. In several — including Ashburn and greater Philadelphia — Northgate's share may be well below monopoly thresholds even under Ridgepoint's narrow fiber-only product market definition. Ridgepoint's single-corridor definition lumps together areas where Northgate is strong with areas where it faces intense competition, creating a misleading blended market share that overstates Northgate's overall competitive position.
This argument serves as a useful complement to the broader product market argument. Even if the court were to accept Ridgepoint's fiber-only product market definition (which we will vigorously contest), the geographic market definition provides an independent basis for challenging the 68% share figure. We should preserve both lines of argument.
B. The Corridor Market May Be Too Narrow
Conversely, there is also a credible argument that Ridgepoint's geographic market is too narrow. Enterprise customers with multi-site operations — which constitute a significant and growing share of the enterprise connectivity market — often procure connectivity on a regional or national basis rather than on a site-by-site, corridor-by-corridor basis. These multi-site customers evaluate carriers based on their ability to serve all of the customer's locations under a single master services agreement, and they consider providers whose footprints extend well beyond the Philadelphia–Baltimore–Washington, D.C. corridor.
Several national and regional carriers with fiber assets in the corridor — including Ostrander Industries, Stonefield Corporation, Westmark Partners LLC, and Northgate Holdings — compete actively for enterprise business in the corridor and are not dependent on Northgate's infrastructure. If the geographic market is defined to reflect the actual procurement behavior of multi-site enterprise customers, it may extend to the entire eastern seaboard or to the national market for enterprise connectivity.
We recommend coordinating with Dr. Narasimhan to analyze customer procurement data, including enterprise RFPs and contract award data, to determine the geographic scope over which enterprise customers actually shop for connectivity services. This analysis would support the argument that Ridgepoint's corridor-level geographic market is too narrow to reflect actual competitive conditions.
As a tactical matter, we may choose to deploy the "too broad" and "too narrow" geographic market arguments selectively depending on the context and audience. For the district court, the "too broad" argument (segmentation by sub-market) may be more powerful because it directly undermines the 68% share figure even within Ridgepoint's proposed corridor. For the FCC proceeding, the "too narrow" argument (national or regional market) may be more useful because it aligns with the FCC's general tendency to analyze broadband competition at a broader geographic level.
VI. Critique of Dr. Kuo's Market Share Methodology
A. Data Sources and Reliability
Dr. Kuo's market share calculations rely on three principal data sources, each of which has significant limitations that we should highlight in our opposition and in any eventual Daubert challenge.
FCC Form 477 Data. Dr. Kuo relies heavily on FCC Form 477 broadband deployment data to estimate the number of fiber connections at the census-tract level within the corridor. Form 477 data has well-documented limitations that the FCC itself has acknowledged. Form 477 requires broadband providers to report the number of connections by census tract, speed tier, and technology, but the data has several known deficiencies: (i) providers may report a connection in a census tract if they serve a single customer in that tract, potentially overstating their actual deployment footprint; (ii) the data does not distinguish between enterprise and residential connections at a granular level, requiring Dr. Kuo to make assumptions about the enterprise share of total connections; (iii) reporting methodologies vary across carriers, introducing inconsistencies; and (iv) the FCC's transition from Form 477 to the Broadband Data Collection (BDC) system, announced in 2021, reflects the agency's own recognition that Form 477 data is insufficient for the type of granular market analysis that Dr. Kuo attempts to conduct. The FCC's 2020 Broadband Deployment Report explicitly cautioned that "Form 477 data has known limitations that affect the precision of deployment analyses at the sub-national level."
Ridgepoint's Internal Competitive intelligence. Dr. Kuo also relies on competitive intelligence data compiled by Ridgepoint's sales and marketing organization, including building-level estimates of carrier presence and market share. This data is inherently suspect for purposes of market definition analysis: it was compiled by an interested party for business purposes, it has not been independently verified or audited, and it may reflect the biases and assumptions of Ridgepoint's sales team (who may, for example, undercount the presence of cable and FWA competitors because those competitors are not perceived as direct rivals in the fiber segment). The use of unverified plaintiff-generated data to define the relevant market raises serious reliability concerns.
Industry Surveys. Dr. Kuo cites industry surveys from organizations such as the Fiber Broadband Association and Drayton Advisors. While these surveys may have some probative value, it is essential to examine the methodology, sample size, and scope of each survey to determine whether it captures the competitive presence of cable, FWA, and ethernet competitors in the corridor. If the surveys are limited to fiber-only market participants — as their names may suggest — they would inherently exclude the competitive alternatives that Northgate contends should be included in the relevant market, rendering them circular as support for a fiber-only market definition.
B. Building Counts vs. Revenue-Based Share
Dr. Kuo appears to calculate Northgate's market share using building connections (i.e., the number of enterprise buildings served by fiber at 1 Gbps and above) as the primary metric. While building counts are one measure of market presence, they are a poor proxy for market share because they do not account for significant differences in revenue per connection, contract size, bandwidth tiers, or the economic significance of individual customer relationships.
A revenue-based market share calculation would better reflect the competitive significance of each provider's market position and may yield materially different results. For example, if Northgate serves a large number of enterprise buildings but at lower average revenue per connection than some competitors — or if competitors serve fewer buildings but with larger, more valuable contracts — the building-count methodology could substantially overstate Northgate's competitive significance. Conversely, revenue-based analysis that includes cable, FWA, and ethernet competitors would further dilute Northgate's share.
We recommend that Dr. Narasimhan prepare an alternative market share calculation using revenue as the metric and compare the results to Dr. Kuo's building-count methodology.
C. Failure to Account for Uncommitted Entrants and Potential Competition
Dr. Kuo's market share analysis focuses exclusively on current market participants and their existing connections. It does not account for uncommitted entrants — carriers who could begin serving enterprise customers in the corridor with modest investment and within a short timeframe — or for potential competition from carriers with fiber or other infrastructure under construction or in the planning stages.
The corridor has significant additional fiber infrastructure under construction or planned by carriers other than Northgate. For example, Ostrander Industries, Stonefield Corporation, and Westmark Partners LLC are all actively expanding their metro fiber networks in the Mid-Atlantic region. Local and regional CLECs beyond Ridgepoint are also investing in new fiber deployments. Under the Horizontal Merger Guidelines and applicable case law, uncommitted entrants who could enter the market within one year should be included in the market share calculation because their potential entry constrains the pricing behavior of incumbent firms. Dr. Kuo's failure to account for these entrants inflates Northgate's share and overstates its ability to exercise market power.
Dr. Narasimhan should model supply-side substitution and potential entry, identifying the carriers that could begin serving enterprise customers in the corridor within one year and estimating their likely competitive impact.
D. Preliminary Daubert Considerations
While a formal Daubert motion will not be appropriate until the case reactivates and expert discovery is complete, we note several methodological vulnerabilities in Dr. Kuo's approach that may support a future challenge under Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993), and Federal Rule of Evidence 702:
(i) Improper exclusion of substitute products. Dr. Kuo's fiber-only market definition is the product of his economic analysis, but if his analytical methodology systematically excludes competitive alternatives that should be included, the resulting market definition is unreliable and inadmissible. We will argue that Dr. Kuo's failure to adequately test the substitutability of cable, FWA, and ethernet renders his market definition opinion methodologically flawed.
(ii) Reliance on data sources with recognized limitations. As discussed above, Dr. Kuo's reliance on FCC Form 477 data and Ridgepoint's internal competitive intelligence raises reliability concerns. If Dr. Kuo cannot demonstrate that his data sources are sufficiently accurate and unbiased to support the precision of his market share calculations, his opinion may be excludable under Daubert.
(iii) Failure to conduct a proper SSNIP test, or, if conducted, failure to account for cross-elasticity of demand. If Dr. Kuo claims to have conducted a SSNIP test but did not account for the cross-elasticity of demand between fiber and cable, FWA, or ethernet — that is, if he did not test whether enterprise customers would switch to non-fiber alternatives in response to a price increase — then his SSNIP analysis is incomplete and unreliable. A SSNIP test that ignores the most significant competitive alternatives is not a SSNIP test at all; it is a tautology.
(iv) Lack of independent verification. Dr. Kuo's reliance on Ridgepoint-generated data that has not been independently verified raises concerns about the independence and objectivity of his analysis, particularly given that he was retained by Ridgepoint's counsel on what appears to be a contingency-linked engagement.
We recommend flagging these issues now and developing them more fully as the case progresses, with the goal of filing a Daubert motion at the appropriate stage.
VII. Coordination with Dr. Priya Narasimhan / Ellsworth Economic Consulting LLC
A. Current Engagement Status
Ellsworth Economic Consulting LLC has been retained by Calderwood & Harkness LLP to provide economic expert analysis in support of Northgate's defense. The engagement is led by Dr. Priya Narasimhan, Managing Director of Ellsworth Economic Consulting, located at 1455 Pennsylvania Avenue NW, Suite 850, Washington, D.C. 20004.
Dr. Narasimhan brings exceptional qualifications to this engagement. She previously served as Chief Economist of the FCC's Wireline Competition Bureau, where she was responsible for economic analysis of broadband competition, interconnection disputes, and market power assessments under Sections 251, 252, and 271 of the Communications Act. Her deep expertise in telecommunications economics and market definition, combined with her familiarity with FCC data sources and analytical methodologies, makes her ideally positioned to develop a rigorous economic rebuttal of Dr. Kuo's analysis. Dr. Narasimhan holds a Ph.D. in economics from MIT and has published in leading economics journals on topics including network economics, broadband competition, and the application of the hypothetical monopolist test in telecommunications markets.
Fees incurred to date for Ellsworth Economic Consulting's work on this engagement total $412,000, covering the preliminary critique of Dr. Kuo's report, initial data collection and review, and preparation of a preliminary damages rebuttal. We anticipate that total fees through the completion of expert discovery and testimony will be in the range of $1.2 million to $1.5 million, depending on the scope of the SSNIP analysis and the volume of proprietary data to be analyzed.
B. Work Plan for Market Definition Analysis
The work plan for Dr. Narasimhan's market definition analysis is structured in three phases, aligned with the anticipated procedural milestones in the district court and FCC proceedings:
Phase 1 (Current): Preliminary Critique and Public Data Review. Phase 1 is underway and encompasses the following tasks: (a) detailed critique of Dr. Kuo's preliminary expert report, including identification of methodological flaws, data limitations, and analytical gaps; (b) review of publicly available data sources relevant to market definition, including FCC Form 477 and BDC data, industry reports from Drayton Advisors, Fenmore Consulting Group, Crowne Albany Consulting Group, and the Fiber Broadband Association, and carrier filings and investor presentations; (c) preliminary assessment of the competitive landscape in the corridor, including identification of cable, FWA, and wholesale ethernet competitors; and (d) development of an initial analytical framework for the SSNIP analysis to be conducted in Phase 2. Phase 1 deliverables include a written preliminary critique memo and a presentation for the defense team, both expected by December 15, 2022.
Phase 2 (Post-Stay): Full SSNIP Analysis with Proprietary Data. Phase 2 will be initiated when the district court stay is lifted and discovery resumes (or earlier if necessary to support the FCC proceeding). This phase will encompass: (a) a full SSNIP / hypothetical monopolist analysis incorporating proprietary data from Northgate's sales records, customer contracts, pricing data (including discounts and competitive responses), and competitive win/loss data for the fourteen-facility corridor footprint; (b) quantification of cross-elasticity of demand between fiber, cable, FWA, and wholesale ethernet services based on actual customer switching data, pricing analyses, and econometric modeling; (c) calculation of market shares under the broader market definition using both building-count and revenue-based methodologies; and (d) analysis of supply-side substitution and potential entry by uncommitted entrants in the corridor. Phase 2 is estimated to require 8–12 weeks of intensive analytical work once data is available.
Phase 3 (Expert Report): Formal Expert Report for District Court. Phase 3 will produce Dr. Narasimhan's formal expert report for submission in the district court proceedings pursuant to Federal Rule of Civil Procedure 26(a)(2). The anticipated scope of the report includes: (a) a market definition opinion setting forth Dr. Narasimhan's conclusions regarding the proper definition of the relevant product and geographic markets; (b) a market share calculation under the broader market definition, including sensitivity analyses; (c) a detailed rebuttal of Dr. Kuo's market definition methodology; and (d) a competitive effects analysis addressing whether Northgate possesses monopoly power in the properly defined relevant market. The expert report will be prepared in compliance with all applicable deadlines set by the court's scheduling order, which will be issued following the lifting of the stay.
C. Data Requests to Northgate
The success of Dr. Narasimhan's analysis depends critically on obtaining detailed proprietary data from Northgate. We have identified the following categories of data that must be collected from the client:
(i) Customer-level revenue and connection data for the fourteen disputed facilities and for the corridor generally, including contract terms, speed tiers, pricing, and customer type (enterprise, government, wholesale);
(ii) Competitive win/loss reports maintained by Northgate's sales organization, documenting instances in which Northgate won or lost enterprise customers to specific competitors, including cable, FWA, and ethernet providers;
(iii) Pricing data, including standard rate cards, negotiated discounts, promotional pricing, and any documentation of pricing adjustments made in response to competition from cable, FWA, or other non-fiber competitors;
(iv) Internal market analyses or strategy documents referencing competitive alternatives, market share, competitive positioning, or market definition — including board presentations, executive strategy memos, marketing materials, and competitive intelligence briefings;
(v) NorthgateOS™ customer migration data, if available, documenting instances in which enterprise customers migrated from fiber-based connectivity to alternative technologies or vice versa, which could provide direct evidence of substitution patterns.
Data collection should be coordinated through Catherine Ng, U.S. Deputy General Counsel for Northgate Networks America Inc., who has been designated as the client's primary point of contact for document production and data requests. Technical aspects of the data collection and document review process will be managed by Candela discovery Solutions Inc. (project manager: Kenji Takahashi) using the Concordia Review™ platform. We recommend scheduling a data collection kickoff call with Ms. Ng and Mr. Takahashi within the next two weeks to establish timelines and data formatting requirements.
VIII. Intersection with FCC Proceeding
The FCC complaint filed by Ridgepoint (Docket WC-23-0042), pending before Administrative Law Judge Robert Fenwick, focuses on the regulatory obligations arising under Sections 251 and 252 of the Communications Act — specifically, whether Northgate has a statutory duty to provide interconnection and colocation access at the fourteen disputed facilities — rather than on antitrust market definition as such. Nevertheless, evidence regarding the competitive landscape in the corridor will be relevant to the FCC's analysis, and the positions taken by Northgate in the FCC proceeding must be carefully coordinated with the positions taken in the district court to ensure consistency and to avoid the risks of judicial estoppel or impeachment.
The FCC has its own body of precedent regarding the definition of relevant markets in the context of interconnection disputes and market power assessments under the Communications Act. In general, the FCC has taken a broader view of competitive alternatives than Ridgepoint's complaint reflects, recognizing cable broadband and (increasingly) fixed wireless as competitive alternatives to traditional fiber-based services. A favorable finding by the FCC — for example, a finding that the corridor is competitively served by multiple providers offering enterprise-grade connectivity across fiber, cable, and wireless platforms — would signific