Anthropic PBC v. U.S. Department of War - Administrative Procedures Act Case

NDCA Recently Filed Documents

Filed March 9th, 2026

Detected March 14th, 2026

Summary

Anthropic PBC has filed a civil case against the U.S. Department of War, citing the Administrative Procedures Act. The case was filed on March 9, 2026, in the U.S. District Court for the Northern District of California. Recent filings include motions for Pro Hac Vice appearances and amicus briefs from various organizations.

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What changed

Anthropic PBC has initiated a lawsuit against the U.S. Department of War, identified as Case Number 3:26-cv-01996, in the U.S. District Court for the Northern District of California. The basis of the suit is the Administrative Procedures Act, specifically concerning a review or appeal of an agency decision. The case was filed on March 9, 2026, and subsequent filings on March 13, 2026, include multiple motions for Pro Hac Vice appearances by various organizations and individuals, as well as several amicus curiae briefs from entities such as the Cato Institute, Chamber of Progress, Electronic Frontier Foundation, and Microsoft Corporation.

This filing signifies a significant legal challenge to a government agency's decision, potentially impacting regulatory interpretation and enforcement within the technology sector. Companies and legal professionals involved in administrative law or technology regulation should monitor this case closely. While no specific compliance deadlines are immediately apparent from these initial filings, the nature of the case suggests potential implications for agency actions and industry practices. The court's rulings on the motions and the eventual outcome of the case could set important precedents.

What to do next

Monitor case developments in Anthropic PBC v. U.S. Department of War
Review amicus briefs filed for potential insights into legal arguments
Assess potential impact on agency decision-making processes

Source document (simplified)

Anthropic PBC v. U.S. Department of War et al

Case Number: 3:26-cv-01996 Location: San Francisco Case Type: Civil Case Basis: Federal Question Nature of Suit: Other Statutes: Administrative Procedures Act/Review or Appeal of Agency Decision Date Filed:

March 9, 2026

Last Filing Date:

March 9, 2026

View Publicly Available Documents Case Summary No summary of this case is available

Recent Filings

| Date Filed | Docket Number | Document Description |
| --- | --- | --- |
| 03-14-26 | 85 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21756529.) filed by Former Senior National Security Government Officials. (Attachments: # (1) Exhibit Certificate of Good Standing)(Swartz, Bruce) |
| 03-13-26 | 63 | Amended MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21750142.) Filing fee previously paid on 3/12/2026 filed by Cato Institute, Chamber of Progress, Electronic Frontier Foundation, First Amendm |
| 03-13-26 | 61 | ORDER by Judge Rita F. Lin denying [59] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-13-26 | 62 | ORDER by Judge Rita F. Lin denying [60] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-13-26 | 64 | ORDER by Judge Rita F. Lin granting [63] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-13-26 | 65 | Amended MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21750305.) Filing fee previously paid on 3/12/2026 filed by Cato Institute, Chamber of Progress, Electronic Frontier Foundation, First Amendm |
| 03-13-26 | 66 | ORDER by Judge Rita F. Lin granting [65] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-13-26 | 67 | Brief of Amici Curiae filed byCato Institute, Chamber of Progress, Electronic Frontier Foundation, First Amendment Lawyers Association, Foundation for Individual Rights and Expression. (Bennett, Addison) |
| 03-13-26 | 71 | MOTION to File Amicus Curiae Brief filed by Catholic Moral Theologians and Ethicists. Responses due by 3/27/2026. Replies due by 4/3/2026. (Miller, Matthew) |
| 03-13-26 | 72 | Brief of Amici Curiae filed byIndustry Trade Associations. (Parker, Warrington) |
| 03-13-26 | 73 | MOTION to File Amicus Curiae Brief in Support of Preliminary Injunction filed by ACT The App Association. Motion Hearing set for 3/24/2026 01:30 PM in San Francisco, Courtroom 15, 18th Floor before Judge Rita F. Lin. Responses due by 3/1 |
| 03-13-26 | 75 | Brief re [55] Order on Motion to File Amicus Curiae Brief,,,, Order on Administrative Motion per Civil Local Rule 7-11,,,,, Brief of Amicus Curiae filed byMicrosoft Corporation. (Related document(s)[55]) (Parker, Warrington) (Filed on 3/1 |
| 03-13-26 | 77 | ADMINISTRATIVE MOTION for FOR LEAVE TO FILE BRIEF OF AMICI CURIAE FREEDOM ECONOMY BUSINESS ASSOCIATION AND OTHER VALUES-LED INVESTORS IN SUPPORT OF PLAINTIFFS MOTION FOR PRELIMINARY INJUNCTION filed by Freedom Economy Business Associati |
| 03-13-26 | 78 | MOTION to File Amicus Curiae Brief filed by Anthropic PBC. Responses due by 3/27/2026. Replies due by 4/3/2026. (Leyton, Stacey) |
| 03-13-26 | 79 | Amicus Curiae APPEARANCE entered by Stacey M. Leyton on behalf of American Federation of Government Employees. (Leyton, Stacey) |
| 03-13-26 | 80 | Brief Amicus Curiae filed byAmerican Federation of Government Employees. (Leyton, Stacey) |
| 03-13-26 | 81 | MOTION for leave to appear in Pro Hac Vice of Sharmistha Das ( Filing fee $ 328, receipt number ACANDC-21738767.) Filing fee previously paid on 03/10/2026 filed by Industry Trade Associations. (Das, Sharmistha) |
| 03-13-26 | 82 | Third Party MOTION to File Amicus Curiae Brief in Favor of Neither Party filed by Abolitionist Law Center. Responses due by 3/27/2026. Replies due by 4/3/2026. (Doost, Sadaf) |
| 03-13-26 | 83 | Brief Corrected Amicus Curiae Brief filed byCatholic Moral Theologians and Ethicists. (Miller, Matthew) |
| 03-13-26 | 74 | Brief re [6] MOTION for Temporary Restraining Order MOTION for Preliminary Injunction MOTION to Stay Pursuant to Section 705, [55] Order on Motion to File Amicus Curiae Brief,,,, Order on Administrative Motion per Civi |
| 03-12-26 | 58 | Brief of Amici Curiae filed byFormer Service Secretaries and Retired Senior Military Officers. (Shin, Clara) |
| 03-12-26 | 55 | ORDER RE AMICUS CURIAE BRIEFS. Amicus briefs in support of the motion for preliminary injunction must be filed by 3/13/2026 at 5:00 p.m. Amicus briefs oppositions due 3/17/2026 at 5:00 p.m. Signed by Judge Rita F. Lin on 3/12/2026. (afm, COURT |
| 03-12-26 | 57 | Transcript of Remote Zoom Video Conference Proceedings held on March 10, 2026, before Judge Rita F. Lin. Stenographic Court Reporter Ana Dub, RDR, CRR, telephone number 415-290-1651, ana_dub@cand.uscourts.gov. Per General Order No. 59 and J |
| 03-12-26 | 59 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21750142.) filed by Cato Institute, Chamber of Progress, Electronic Frontier Foundation, First Amendment Lawyers Association, Foundation for Individ |
| 03-12-26 | 60 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21750305.) filed by Cato Institute, Chamber of Progress, Electronic Frontier Foundation, First Amendment Lawyers Association, Foundation for Individ |
| 03-11-26 | 54 | ADMINISTRATIVE MOTION OF ALAN Z. ROZENSHTEIN FOR LEAVE TO FILE AS AMICUS CURIAE A BRIEF IN SUPPORT OF PLAINTIFFS MOTION FOR A TEMPORARY RESTRAINING ORDER, PRELIMINARY INJUNCTION, OR SECTION 705 STAY -(UNOPPOSED) filed by Alan Z Rozenshte |
| 03-11-26 | 53 | ORDER by Judge Rita F. Lin granting [46] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-11-26 | 52 | ORDER by Judge Rita F. Lin granting [45] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-11-26 | 51 | ORDER by Judge Rita F. Lin granting [44] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-11-26 | 50 | ORDER by Judge Rita F. Lin granting [43] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-11-26 | 49 | ORDER by Judge Rita F. Lin granting [42] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-11-26 | 48 | ORDER by Judge Rita F. Lin granting [41] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-11-26 | 47 | TRANSCRIPT ORDER for proceedings held on 03/10/2026 before Judge Rita F. Lin by Anthropic PBC, for Court Reporter Ana Dub. (Mongan, Michael) |
| 03-10-26 | 44 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21741668.) filed by Former Service Secretaries and Retired Senior Military Officers. (Jain, Mishi) |
| 03-10-26 | 46 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21741689.) filed by Former Service Secretaries and Retired Senior Military Officers. (Ujayli, Laila) |
| 03-10-26 | 45 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21741678.) filed by Former Service Secretaries and Retired Senior Military Officers. (Crowley, Megan) |
| 03-10-26 | 43 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21741639.) filed by Former Service Secretaries and Retired Senior Military Officers. (Berengaut, Alexander) |
| 03-10-26 | 30 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21738632.) filed by Employees of OpenAI and Google in Their Personal Capacities. (Attachments: # (1) Exhibit - Certificate of Good Standing)(El-Ma |
| 03-10-26 | 31 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21738673.) filed by Employees of OpenAI and Google in Their Personal Capacities. (Attachments: # (1) Exhibit - Certificate of Good Standing)(Lev, |
| 03-10-26 | 32 | MOTION for leave to appear in Pro Hac Vice Sharmistha Das ( Filing fee $ 328, receipt number ACANDC-21738767.) filed by Microsoft Corporation. (Das, Sharmistha) |
| 03-10-26 | 33 | MOTION for leave to appear in Pro Hac Vice Matthew F. Ferraro ( Filing fee $ 328, receipt number ACANDC-21738897.) filed by Microsoft Corporation. (Ferraro, Matthew) |
| 03-10-26 | 34 | ADMINISTRATIVE MOTION LEAVE TO FILE BRIEF OF AMICUS CURIAE filed by Microsoft Corporation. Responses due by 3/16/2026. (Attachments: # (1) Exhibit 1, # (2) Proposed Order RE ADMINISTRATIVE MOTION FOR LEAVE TO FILE AN AMICUS CURIAE BRI |
| 03-10-26 | 35 | ORDER by Judge Rita F. Lin granting [30] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-10-26 | 37 | ORDER by Judge Rita F. Lin granting [32] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-10-26 | 40 | Consent MOTION to File Amicus Curiae Brief filed by Former Service Secretaries and Retired Senior Military Officers. Responses due by 3/24/2026. Replies due by 3/31/2026. (Attachments: # (1) Proposed Brief of Amici, # (2) Proposed Orde |
| 03-10-26 | 41 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21741598.) filed by Former Service Secretaries and Retired Senior Military Officers. (Harrington, Sarah) |
| 03-10-26 | 42 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21741622.) filed by Former Service Secretaries and Retired Senior Military Officers. (Zionts, David) |
| 03-10-26 | 36 | ORDER by Judge Rita F. Lin granting [31] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-09-26 | 13 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21732041.) filed by Anthropic PBC. (Hennessey, Susan) |
| 03-09-26 | 12 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21732012.) filed by Anthropic PBC. (Data, Sonika) |
| 03-09-26 | 11 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21731978.) filed by Anthropic PBC. (Powell, Laura) |
| 03-09-26 | 10 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21731945.) filed by Anthropic PBC. (Lamb, Kevin) |
| 03-09-26 | 9 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21731904.) filed by Anthropic PBC. (Dunbar, Kelly) |
| 03-09-26 | 8 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21731872.) filed by Anthropic PBC. (Geltzer, Joshua) |
| 03-09-26 | 7 | MOTION for leave to appear in Pro Hac Vice ( Filing fee $ 328, receipt number ACANDC-21731784.) filed by Anthropic PBC. (Barnet, Emily) |
| 03-09-26 | 6 | MOTION for Temporary Restraining Order , MOTION for Preliminary Injunction , MOTION to Stay Pursuant to Section 705 filed by Anthropic PBC. Responses due by 3/11/2026. Replies due by 3/12/2026. (Attachments: # (1) Dec |
| 03-09-26 | 4 | CONSENT/DECLINATION to Proceed Before a US Magistrate Judge by Anthropic PBC.. (Mongan, Michael) |
| 03-09-26 | 3 | Corporate Disclosure Statement by Anthropic PBC identifying Other Affiliate Google LLC, Other Affiliate Amazon Web Services, Inc. for Anthropic PBC. / Anthropic PBC's Disclosure Statement Pursuant to Federal Rule of Civil Procedure 7.1 and |
| 03-09-26 | 1 | COMPLAINT for Declaratory and Injunctive Relief against All Defendants ( Filing fee $ 405, receipt number ACANDC-21731347.). Injunction against the US government/official or APA vacatur requested. Filed by Anthropic PBC. (Atta |
| 03-09-26 | 2 | Proposed Summons. (Mongan, Michael) |
| 03-09-26 | 14 | ORDER by Judge Rita F. Lin granting [7] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-09-26 | 15 | ORDER by Judge Rita F. Lin granting [8] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-09-26 | 16 | ORDER by Judge Rita F. Lin granting [9] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-09-26 | 17 | ORDER by Judge Rita F. Lin granting [10] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-09-26 | 18 | ORDER by Judge Rita F. Lin granting [11] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-09-26 | 19 | ORDER by Judge Rita F. Lin granting [12] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-09-26 | 20 | ORDER by Judge Rita F. Lin granting [13] Motion for Pro Hac Vice. (afm, COURT STAFF) |
| 03-09-26 | 21 | ADMINISTRATIVE MOTION to Increase Page Limits Pursuant to L.R. 7-11 for Motion for a Temporary Restraining Order, Preliminary Injunction, or Section 705 Stay filed by Anthropic PBC. Responses due by 3/13/2026. (Attachments: # (1) Decl |
| 03-09-26 | 23 | ORDER SETTING STATUS CONFERENCE re [6]. Status Conference set for 3/10/2026 03:00 PM in San Francisco, - Videoconference Only before Judge Rita F. Lin. Signed by Judge Rita F. Lin on 3/9/2026. (afm, COURT STAFF) |
| 03-09-26 | 24 | MOTION to File Amicus Curiae Brief filed by Employees of OpenAI and Google in Their Personal Capacities. Responses due by 3/23/2026. Replies due by 3/30/2026. (Attachments: # (1) Exhibit Amici Curiae Brief of Employees of OpenAI and G |
| 03-09-26 | 26 | Summons Issued as to Paul S. Atkins, Scott Bessent, Frank J. Bisigano, Mary Anne Carter, Douglas A. Collins, Executive Office of the President, Federal Housing Finance Agency, Federal Reserve Board of Governors, Edward C. Forst, General Services Admi |
| 03-09-26 | 27 | MOTION to File Amicus Curiae Brief filed by Foundation for Individual Rights and Expression, Electronic Frontier Foundation, Cato Institute, Chamber of Progress, First Amendment Lawyers Association. Responses due by 3/23/2026. Replies d |
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