Contract analysis

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 c

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 wholl

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 Octo

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

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 conduci

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

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

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

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

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 t

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 regard

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 broade

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, p

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 structu

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 modul

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 of

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

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 e

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 mi

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 o

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

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

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 enga