CALDERWOOD & HARKNESS LLP 1301 K Street NW, Suite 1100 Washington, D.C. 20005
October 14, 2025
VIA EMAIL AND FIRST-CLASS MAIL
Adrienne Kolb Senior Trial Attorney Counterintelligence and Export Control Section National Security Division U.S. Department of Justice 950 Pennsylvania Avenue NW Washington, D.C. 20530
Jonathan Weir Trial Attorney Counterintelligence and Export Control Section National Security Division U.S. Department of Justice 950 Pennsylvania Avenue NW Washington, D.C. 20530
Re: DOJ NSD Inquiry No. NSD-CES-2025-04871 — Halcyon Semiconductor Inc.
Dear Ms. Kolb and Mr. Weir:
The purpose of this letter is to advise you that Calderwood & Harkness LLP has been retained to represent both Halcyon Semiconductor AG ("HSAG"), a Swiss corporation, and its wholly owned U.S. subsidiary, Halcyon Semiconductor Inc. ("HSI," and together with HSAG, the "Company"), in connection with the above-referenced inquiry. We respectfully request that all communications, requests for information, document requests, and any other correspondence concerning this matter be directed to the undersigned at the contact information set forth below.
The points of contact at Calderwood & Harkness LLP for all matters relating to this inquiry are as follows:
Howard Quinn, Partner
Email: hquinn@calderwoodharkness.com
Telephone: (202) 555-0147
Liam Donahue, Associate
Email: ldonahue@calderwoodharkness.com
Telephone: (202) 555-0193
We write also to acknowledge receipt of the Department's voluntary request for information letter dated October 9, 2025, which was received by HSI at its offices located at 4700 Great America Parkway, Suite 300, San Jose, California 95054. Our Firm is currently in the process of reviewing the request and its accompanying specifications in detail. We would welcome the opportunity to discuss with the Department, at your earliest convenience, the scope and timeline for the Company's response, including any preliminary questions we may have regarding the categories of information and documents identified in the request.
Halcyon takes this matter seriously and intends to cooperate fully with the Department's inquiry. We look forward to working with you and your colleagues in a constructive and transparent manner throughout this process.
Respectfully,
CALDERWOOD & HARKNESS LLP
By: ________
Howard Quinn Partner
cc:
Marcus Friedl, General Counsel, Halcyon Semiconductor AG Derek Tran, President, Halcyon Semiconductor Inc. Conrad Ashby, Partner, Calderwood & Harkness LLP