Case: Anthropic PBC v. United States Department of War

Anthropic PBC v. U.S. Department of War

PETITION FOR REVIEW [2162687] of a decision by federal agency filed by Anthropic PBC [Service Date: 03/09/2026] Disclosure Statement: Attached. [26-1049] [Entered: 03/09/2026 12:27 PM]

CERTIFIED COPY [2162688] of Petition for Review sent to respondent [2162687-2]. [26-1049] [Entered: 03/09/2026 12:28 PM]

CLERK'S ORDER [2162695] filed directing the parties to file initial submissions: PETITIONER docketing statement due 04/08/2026. PETITIONER certificate as to parties due 04/08/2026. PETITIONER statement of issues due 04/08/2026. PETITIONER underlying decision due 04/08/2026. PETITIONER deferred appendix statement due 04/08/2026. PETITIONER procedural motions due 04/08/2026. PETITIONER dispositive motions due 04/23/2026. RESPONDENT entry of appearance due 04/08/2026. RESPONDENT procedural motions due 04/08/2026. RESPONDENT certified index to record due 04/23/2026. RESPONDENT dispositive motions due 04/23/2026 [26-1049] [Entered: 03/09/2026 12:43 PM]

PETITION FOR REVIEW CASE docketed. [26-1049] [Entered: 03/09/2026 12:26 PM]

ENTRY OF APPEARANCE [2163025] filed by Sharon Swingle and co-counsel Sean R. Janda; Brian J. Springer on behalf of Respondents Peter B. Hegseth and United States Department of War. [26-1049] (Janda, Sean) [Entered: 03/10/2026 06:02 PM]

EMERGENCY MOTION [2163176] to stay underlying order pending appeal filed by Anthropic PBC (Service Date: 03/11/2026 by CM/ECF NDA) Length Certification: 5,188 Words. [26-1049] (Dunbar, Kelly) [Entered: 03/11/2026 11:15 PM]

1 Petitioner's Emergency Motion for Stay Pending Review

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2 Addendum

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3 Checklist for Emergency Motions

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MOTION [2163178] to participate as amicus curiae [Disclosure Listing: Attached] filed by Foundation for American Innovation, Fifty Years, Fathom, ChinaTalk, Martin Chorzempa, Alex Imas, Pangram, Institute for Progress, Dean Ball, Dwarkesh Patel, Roots of Progress, Saif Khan [Service Date: 03/12/2026 ] [26-1049] (Hwang, Tim) [Entered: 03/12/2026 12:38 AM]

1 Motion to Participate as Amicus Curiae Filed

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2 Proposed Amicus Brief

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AMICUS FOR PETITIONER BRIEF [2163215] lodged by Dean Ball, ChinaTalk, Martin Chorzempa, Fathom, Fifty Years, Foundation for American Innovation, Alex Imas, Institute for Progress, Saif Khan, Pangram, Dwarkesh Patel and Roots of Progress [Service Date: 03/12/2026 ] Length of Brief: 3,541 words. [26-1049] [Entered: 03/12/2026 10:31 AM]

MOTION [2163273] to participate as amicus curiae [Disclosure Listing: Not Applicable to this Party] filed by Former Service Secretaries and Retired Senior Military Officers [Service Date: 03/12/2026 ] [26-1049] (Harrington, Sarah) [Entered: 03/12/2026 01:38 PM]

AMICUS FOR PETITIONER BRIEF [2163300] lodged by Former Service Secretaries and Retired Senior Military Officers [Service Date: 03/12/2026 ] Length of Brief: 3,755 words. [26-1049] [Entered: 03/12/2026 02:41 PM]

CONSENT NOTICE [2163366] of intention to participate as amicus curiae [Disclosure Listing: Attached] filed by Employees of Open AI and Google in Their Personal Capacities [Service Date: 03/12/2026 ] [26-1049] (Lev, Ori) [Entered: 03/12/2026 07:18 PM]

AMICUS FOR PETITIONER BRIEF [2163373] filed by Foundation for Individual Rights and Expression, Electronic Frontier Foundation, Cato Institute, Chamber of Progress, and First Amendment Lawyers Association [Service Date: 03/12/2026 ] Length of Brief: 5,151 words. [26-1049] (Shah, Sopen) [Entered: 03/12/2026 09:38 PM]

CONSENT AMICUS FOR PETITIONER BRIEF [2163420] filed by Employees of OpenAI and Google in Their Personal Capacities [Service Date: 03/13/2026 ] Length of Brief: 3,282. [26-1049] (Lev, Ori) [Entered: 03/13/2026 09:28 AM]

PER CURIAM ORDER [2163428] filed ORDERED that respondents file a response to the emergency motion for a stay [2163176-2] by March 19, 2026. Petitioner’s reply is due by March 23, 2026. Before Judges: Wilkins, Katsas and Rao. [26-1049] [Entered: 03/13/2026 09:42 AM]

CONSENT NOTICE [2163584] of intention to participate as amicus curiae [Disclosure Listing: Not Applicable to this Party] filed by Professor Alan Z. Rozenshtein [Service Date: 03/13/2026 ] [26-1049] (Theodore, Elisabeth)

AMICUS FOR PETITIONER BRIEF [2163588] filed by Professor Alan Z. Rozenshtein [Service Date: 03/13/2026 ] Length of Brief: 4,383 Words. [26-1049] (Theodore, Elisabeth)

AMICUS FOR PETITIONER BRIEF [2163623] filed by Freedom Economy Business Association [Service Date: 03/13/2026 ] Length of Brief: 2,449. [26-1049] (Harris, George)

1 Amicus for Appellant/Petitioner Brief Filed

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2 Notice of Intent to Support Petitioner

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3 Entry of Appearance - George Harris

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ENTRY OF APPEARANCE [2163740] filed by Mr. George C. Harris for Freedom Economy Business Association, Candide Group, Howard Fischer, Thomas Haslett, Investor Advocates for Social Justice, Mission Driven Finance, The Nathan Cummings Foundation, Inc., Omidyar Network LLC and Pluralize Capital. [26-1049] [Entered: 03/16/2026 10:44 AM]

MOTION [2163901] to participate as amicus curiae [Disclosure Listing: Attached] filed by Former Senior National Security Government Officials [Service Date: 03/16/2026 ] [26-1049] (Loeb, Alexis) [Entered: 03/16/2026 05:52 PM]

1 Motion to Participate as Amicus Curiae Filed

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2 Proposed Amici Brief

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MOTION [2163907] to participate as amicus curiae [Disclosure Listing: Attached] filed by American Civil Liberties Union and Center for Democracy & Technology [Service Date: 03/16/2026 ] [26-1049] (Gorski, Ashley) [Entered: 03/16/2026 07:03 PM]

1 Motion to Participate as Amicus Curiae Filed

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2 Proposed Amicus Brief

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3 Entry of Appearance

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AMICUS FOR PETITIONER BRIEF [2163908] lodged by Former Senior National Security Government Officials [Service Date: 03/16/2026 ] Length of Brief: 6,132 Words. [26-1049] [Edited 03/17/2026 by EKC--MODIFIED EVENT FROM FILED TO LODGED] (Loeb, Alexis) [Entered: 03/16/2026 07:10 PM]

AMENDED AMICUS FOR PETITIONER BRIEF [2163912] filed by Freedom Economy Business Association [Service Date: 03/16/2026 ] Length of Brief: 2,449. [26-1049]--[Edited 03/17/2026 by EKC] (Harris, George) [Entered: 03/16/2026 07:32 PM]

1 Amicus for Appellant/Petitioner Supplemental Brief Filed

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2 Amended Corporate Disclosure Statement of Amici FEBA et al

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MOTION [2163913] to participate as amicus curiae [Disclosure Listing: Not Applicable to this Party] filed by Catholic Theologians and Ethicists [Service Date: 03/16/2026 ] [26-1049] (Klubes, Benjamin) [Entered: 03/16/2026 07:45 PM]

AMICUS FOR PETITIONER BRIEF [2163914] lodged by Catholic Theologians and Ethicists [Service Date: 03/16/2026 ] Length of Brief: 2,580 words. [26-1049] [Edited 03/17/2026 by EKC--MODIFIED EVENT FROM FILED TO LODGED] (Klubes, Benjamin) [Entered: 03/16/2026 07:50 PM]

MOTION [2163923] to participate as amicus curiae [Disclosure Listing: Attached] filed by TechNet, Software & Information Industry Association, Computer & Communications Industry Association, Information Technology Industry Council [Service Date: 03/16/2026 ] [26-1049] (Wolff, Daniel) [Entered: 03/16/2026 11:02 PM]

AMICUS FOR PETITIONER BRIEF [2163924] lodged by TechNet, Software & Information Industry Association, Computer & Communications Industry Association, Information Technology Industry Council [Service Date: 03/16/2026 ] Length of Brief: 2459 words. [26-1049] [Edited 03/17/2026 by EKC--MODIFIED EVENT FROM FILED TO LODGED] (Wolff, Daniel) [Entered: 03/16/2026 11:05 PM]

ENTRY OF APPEARANCE [2164097] filed by Ashley Gorski for American Civil Liberties Union and Center for Democracy and Technology and Patrick Toomey for American Civil Liberties Union and Center for Democracy and Technology. [26-1049] [Entered: 03/17/2026 03:15 PM]

AMICUS FOR PETITIONER BRIEF [2164098] lodged by American Civil Liberties Union and Center for Democracy and Technology [Service Date: 03/16/2026 ] Length of Brief: 6,486 words. [26-1049] [Entered: 03/17/2026 03:18 PM]

NOTICE [2164108] of intention to participate as amicus curiae [Disclosure Listing: Attached] filed by ACT | The App Association [Service Date: 03/17/2026 ] [26-1049] (Scarpelli, Brian) [Entered: 03/17/2026 03:25 PM]

MOTION [2164113] to participate as amicus curiae [Disclosure Listing: Attached] filed by ACT | The App Association [Service Date: 03/17/2026 ] [26-1049] (Scarpelli, Brian) [Entered: 03/17/2026 03:36 PM]

1 Motion to Participate as Amicus Curiae Filed

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2 ACT Amicus Curiae

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CORRECTED AMICUS FOR PETITIONER BRIEF [2164145] filed by Former Senior National Security Government Officials [Service Date: 03/17/2026 ] Length of Brief: 6,132 Words. [26-1049] (Loeb, Alexis) [Entered: 03/17/2026 05:55 PM]

MOTION [2164155] to participate as amicus curiae [Disclosure Listing: Attached] filed by 149 Former Judges and Democracy Defenders Fund [Service Date: 03/17/2026 ] [26-1049] (Brill, Sophia)

1 Motion to Participate as Amicus Curiae Filed

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2 Proposed Amicus Brief of 149 Former Judges and Democracy Defenders Fund

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AMICUS FOR PETITIONER BRIEF [2164156] filed by 149 Former Judges and Democracy Defenders Fund [Service Date: 03/17/2026 ] Length of Brief: 4,224 words. [26-1049] (Brill, Sophia)

AMICUS FOR PETITIONER BRIEF [2164233] lodged by ACT | The App Association [Service Date: 03/17/2026 ] Length of Brief: 2,103 words. [26-1049] [Entered: 03/18/2026 01:05 PM]

RESPONSE IN OPPOSITION [2164558] to motion [2163176-2] filed by Peter B. Hegseth and United States Department of War [Service Date: 03/19/2026 by CM/ECF NDA] Length Certification: 5162 words. [26-1049] (Janda, Sean)

REPLY [2165167] filed by Anthropic PBC to response [Service Date: 03/23/2026 by CM/ECF NDA] Length Certification: 2,600 Words. [26-1049] (Dunbar, Kelly)

LETTER [2165837] pursuant to FRAP 28j advising of additional authorities filed by Anthropic PBC [Service Date: 03/26/2026 ] [26-1049] (Dunbar, Kelly) [Entered: 03/26/2026 10:08 PM]

1 Letter Filed

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2 Exhibit A

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3 Exhibit B

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MOTION [2167990] to participate as amicus curiae combined with AMICUS FOR PETITIONER BRIEF lodged by James Lakner [Service Date: 04/02/2026] Length of Brief: 1 page. [26-1049] [Entered: 04/10/2026 11:41 AM]

[DENIED BY ORDER FILED 4/20/26] MOTION 2167990 to participate as amicus curiae combined with AMICUS FOR PETITIONER BRIEF lodged by James Lakner [Service Date: 04/02/2026] Length of Brief: 1 page. [26-1049] [Entered: 04/10/2026 11:41 AM]

DOCKETING STATEMENT [2167654] filed by Anthropic PBC [Service Date: 04/08/2026 ] [26-1049] (Dunbar, Kelly) [Entered: 04/08/2026 03:32 PM]

CERTIFICATE AS TO PARTIES, RULINGS AND RELATED CASES [2167655] filed by Anthropic PBC [Service Date: 04/08/2026 ] [26-1049] (Dunbar, Kelly) [Entered: 04/08/2026 03:34 PM]

STATEMENT OF ISSUES [2167656] filed by Anthropic PBC [Service Date: 04/08/2026 ] [26-1049] (Dunbar, Kelly) [Entered: 04/08/2026 03:38 PM]

UNDERLYING DECISION IN CASE [2167657] submitted by Anthropic PBC [Service Date: 04/08/2026 ] [26-1049] (Dunbar, Kelly) [Entered: 04/08/2026 03:40 PM]

1 Certificate of Underlying Decisions

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2 Exhibit 1

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3 Exhibit 2

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4 Exhibit 3

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STATEMENT OF INTENT REGARDING APPENDIX DEFERRAL [2167658] filed by Anthropic PBC [Service Date: 04/08/2026 ] Intent: AppxDeferred [26-1049] (Dunbar, Kelly) [Entered: 04/08/2026 03:42 PM]

PER CURIAM ORDER (with Per Curiam Statement attached) [2167684] filed granting motions to participate as amicus curiae [2164155-2], [2164113-2], [2163923-2], [2163913-2], [2163907-2], granting motion to participate as amicus curiae [2163901-2], [2163273-2], [2163178-2]; The Clerk is directed to file the lodged Amicus briefs [2164233-2], [2164156-2], [2164145-2], [2164098-2], [2163924-2], [2163914-2], [2163300-2], [2163215-2]; denying emergency motion for stay pending appeal [2163176-2], setting briefing schedule: PETITIONER Brief due 04/22/2026. APPENDIX due 04/22/2026. Brief(s) of Amicus Curiae, if any, Supporting Petitioner due 04/22/2026. RESPONDENT Brief due on 05/06/2026. Briefs(s) of Amicus Curiae, if any, Supporting Respondents due 05/06/2026. PETITIONER Reply Brief due 05/13/2026 (SEE ORDER FOR DETAILS), scheduling oral argument on Tuesday, 05/19/2026. Before Judges: Henderson, Katsas and Rao. [26-1049] [Entered: 04/08/2026 05:31 PM]

PER ABOVE ORDER lodged Amicus brief [2164233-2], Amicus brief [2164156-2], Amicus brief [2164145-2], Amicus brief [2164098-2], Amicus brief [2163924-2], Amicus brief [2163914-2], Amicus brief [2163300-2], Amicus brief [2163215-2] is filed [26-1049]

PER ABOVE ORDER lodged Amicus brief [2164233-2], Amicus brief [2164156-2], Amicus brief [2164145-2], Amicus brief [2164098-2], Amicus brief [2163924-2], Amicus brief [2163914-2], Amicus brief [2163300-2], Amicus brief [2163215-2] is filed [26-1049] [Entered: 04/08/2026 05:34 PM]

PER CURIAM ORDER [2169502] filed denying motion of James Lakner to participate as amicus curiae [2167990-2]. The Clerk is directed to note the docket accordingly. Before Judges: Henderson, Katsas and Rao. [26-1049] [Entered: 04/20/2026 02:48 PM]

AMICUS FOR PETITIONER BRIEF [2169767] filed by Foundation for American Innovation, Fifty Years, Fathom, ChinaTalk, Martin Chorzempa, Alex Imas, Pangram, Institute for Progress, Dean Ball, Dwarkesh Patel, Roots of Progress and Saif Khan Michael Sobolik, Steve Newman, Taren Stinebrickner-Kauffman [Service Date: 04/22/2026 ] Length of Brief: 3,612 words. [26-1049] (Hwang, Tim) [Entered: 04/22/2026 09:48 AM]

CONSENT AMICUS FOR PETITIONER BRIEF [2169853] filed by Taxpayers Protection Alliance Foundation [Service Date: 04/22/2026 ] Length of Brief: 3822 words. [26-1049] (Smith, Barbara) [Entered: 04/22/2026 01:35 PM]

ENTRY OF APPEARANCE [2169865] filed by Josephine K. Petrick on behalf of Amici Curiae for Petitioner Freedom Economy Business Association, The Nathan Cummings Foundation, Inc., Candide Group, Howard Fischer, Thomas Haslett, The Interfaith Center on Corporate Responsibility, Humanize Wealth, Investor Advocates for Social Justice, Pluralize Capital, Mission Driven Finance, John O'Farrell and Omidyar Network LLC. [26-1049] (Petrick, Josephine) [Entered: 04/22/2026 02:12 PM]

AMICUS FOR PETITIONER BRIEF [2169868] filed by Freedom Economy Business Association, Candide Group, Howard Fischer, Thomas Haslett, Humanize Wealth, Investor Advocates for Social Justice, Mission Driven Finance, John O'Farrell, Omidyar Network LLC, Pluralize Capital, The Interfaith Center on Corporate Responsibility and The Nathan Cummings Foundation, Inc. American Federation of Teachers; Adasina Social Capital [Service Date: 04/22/2026 ] Length of Brief: 3,125 words. [26-1049] (Petrick, Josephine) [Entered: 04/22/2026 02:23 PM]

1 Amicus for Appellant/Petitioner Brief Filed

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2 Amended Notice of Intent

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AMICUS FOR PETITIONER FINAL BRIEF [2169900] filed by Catholic Moral Theologians and Ethicists Catholic Theologians and Ethicists [Service Date: 04/22/2026 ] Length of Brief: 2,605 words. [26-1049] (Klubes, Benjamin) [Entered: 04/22/2026 04:05 PM]

AMICUS FOR PETITIONER BRIEF [2169913] filed by Former Senior National Security Government Officials [Service Date: 04/22/2026 ] Length of Brief: 6,490 words. [26-1049] (Loeb, Alexis) [Entered: 04/22/2026 04:55 PM]

CONSENT NOTICE [2169923] of intention to participate as amicus curiae [Disclosure Listing: Attached] filed by Employees of Open AI and Google in Their Personal Capacities [Service Date: 04/22/2026 ] [26-1049] (Lev, Ori) [Entered: 04/22/2026 05:21 PM]

CONSENT AMICUS FOR PETITIONER BRIEF [2169928] filed by Employees of OpenAI and Google in their personal capacities [Service Date: 04/22/2026 ] Length of Brief: 3,282 Words. [26-1049] (Lev, Ori) [Entered: 04/22/2026 05:29 PM]

CONSENT AMICUS FOR PETITIONER BRIEF [2169929] filed by American Civil Liberties Union and Center for Democracy and Technology [Service Date: 04/22/2026 ] Length of Brief: 6,496 words. [26-1049] (Gorski, Ashley) [Entered: 04/22/2026 05:30 PM]

AMICUS FOR PETITIONER BRIEF [2169931] filed by Former Service Secretaries [Service Date: 04/22/2026 ] Length of Brief: 3,776 Words. [26-1049] (Harrington, Sarah) [Entered: 04/22/2026 05:43 PM]

AMICUS FOR PETITIONER BRIEF [2169949] filed by ACT | The App Association [Service Date: 04/22/2026 ] Length of Brief: This brief complies with Fed. R. App. P. 29(a)(5) and 32(f) because it con-tains 2103 words, excluding the parts of the brief exempted by Fed. R. App. P. 32(f).. [26-1049] (Scarpelli, Brian) [Entered: 04/22/2026 06:44 PM]

PETITIONER BRIEF [2169950] filed by Anthropic PBC [Service Date: 04/22/2026 ] Length of Brief: 12,890 words. [26-1049] (Dunbar, Kelly) [Entered: 04/22/2026 06:45 PM]

CONSENT AMICUS FOR PETITIONER BRIEF [2169951] filed by Leon Panetta and the Institute for Security and Technology [Service Date: 04/22/2026 ] Length of Brief: 34 Pages. [26-1049] (Klapper, Matthew) [Entered: 04/22/2026 06:47 PM]

APPENDIX [2169955] filed by Anthropic PBC [Volumes: 4] [Service Date: 04/22/2026 ] [26-1049] (Dunbar, Kelly) [Entered: 04/22/2026 07:11 PM]

1 Appendix Volume 1 (App.1-App.65)

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2 Appendix Volume 2 (App.66-App.176)

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3 Appendix Volume 3 (App.177-App.297)

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4 Appendix Volume 4 (App.298-App.422)

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AMICUS FOR PETITIONER BRIEF [2169958] filed by 149 Former Judges and Democracy Defenders Fund [Service Date: 04/22/2026 ] Length of Brief: 5592. [26-1049] (Costa, Gregg) [Entered: 04/22/2026 07:47 PM]

CONSENT AMICUS FOR PETITIONER BRIEF [2169965] filed by Foundation for Individual Rights and Expression, Cato Institute, First Amendment Lawyers Association, Electronic Frontier Foundation and Chamber of Progress [Service Date: 04/22/2026 ] Length of Brief: 5,566 words. [26-1049] (Shah, Sopen) [Entered: 04/22/2026 08:35 PM]

NOTICE [2169968] of intention to participate as amicus curiae [Disclosure Listing: Attached] filed by TechNet, Software & Information Industry Association, Computer & Communications Industry Association, Information Technology Industry Council [Service Date: 04/22/2026 ] [26-1049] (Wolff, Daniel) [Entered: 04/22/2026 08:45 PM]

CONSENT AMICUS FOR PETITIONER BRIEF [2169969] filed by Faith Family Technology Network [Service Date: 04/22/2026 ] Length of Brief: 3530 Words.. [26-1049] (Kilaru, Rakesh) [Entered: 04/22/2026 08:45 PM]

CONSENT AMICUS FOR PETITIONER BRIEF [2169972] filed by TechNet, Software & Information Industry Association, Computer & Communications Industry Association and Information Technology Industry Council [Service Date: 04/22/2026 ] Length of Brief: 5,961 words. [26-1049] (Wolff, Daniel) [Entered: 04/22/2026 09:04 PM]

CONSENT AMICUS FOR PETITIONER BRIEF [2169974] filed by Alan Z. Rozenshtein [Service Date: 04/22/2026 ] Length of Brief: 4,386 words. [26-1049] (Theodore, Elisabeth) [Entered: 04/22/2026 09:27 PM]

AMICUS FOR RESPONDENT BRIEF [2170051] filed by JOEL THAYER, SENIOR FELLOW AT THE AMERICA FIRST POLICY INSTITUTE [Service Date: 04/23/2026 ] Length of Brief: 3,157 words. [26-1049] (Thayer, Joel) [Entered: 04/23/2026 01:04 PM]

CERTIFIED INDEX TO RECORD [2170179] filed by Peter B. Hegseth and United States Department of War [Service Date: 04/23/2026 ] [26-1049] (Janda, Sean) [Entered: 04/23/2026 06:00 PM]

CORRECTED AMICUS FOR PETITIONER BRIEF [2170651] filed by Former Service Secretaries [Service Date: 04/27/2026 ] Length of Brief: 3,765 Words. [26-1049] (Harrington, Sarah) [Entered: 04/27/2026 05:57 PM]

CORRECTED AMICUS FOR PETITIONER BRIEF [2170925] filed by Freedom Economy Business Association, Candide Group, Howard Fischer, Thomas Haslett, Humanize Wealth, Institute for Progress, Investor Advocates for Social Justice, Mission Driven Finance, John O'Farrell, Pluralize Capital, The Interfaith Center on Corporate Responsibility and The Nathan Cummings Foundation, Inc. American Federation of Teachers; Adasina Social Capital [Service Date: 04/28/2026 ] Length of Brief: 3,125 Words. [26-1049]--[Edited 04/29/2026 by EBL-Docket Text Modified] (Petrick, Josephine) [Entered: 04/28/2026 07:11 PM]

PER CURIAM ORDER [2172079] filed allocating oral argument time as follows: Petitioner - 15 Minutes, Respondents - 15 Minutes. One counsel per side to argue; directing party to file Form 72 notice of arguing attorney by 05/08/2026 [26-1049] [Entered: 05/06/2026 01:51 PM]

NOTICE [2172136] to withdraw attorney Sopen B. Shah who represented Cato Institute, Chamber of Progress, Electronic Frontier Foundation, First Amendment Lawyers Association and Foundation for Individual Rights and Expression in 26-1049 filed by Cato Institute, Chamber of Progress, Electronic Frontier Foundation, First Amendment Lawyers Association and Foundation for Individual Rights and Expression [Service Date: 05/06/2026 ] [26-1049] (Shah, Sopen) [Entered: 05/06/2026 06:04 PM]

RESPONDENT BRIEF [2172140] filed by Peter B. Hegseth and United States Department of War [Service Date: 05/06/2026 ] Length of Brief: 12,966 words. [26-1049] (Janda, Sean) [Entered: 05/06/2026 08:54 PM]

FORM 72 submitted by arguing attorney, Sharon Swingle, on behalf of Respondents Peter B. Hegseth and United States Department of War (For Internal Use Only: Form is restricted to protect counsel's personal contact information). [26-1049] (Swingle, Sharon)

FORM 72 submitted by arguing attorney, Kelly P. Dunbar, on behalf of Petitioner Anthropic PBC (For Internal Use Only: Form is restricted to protect counsel's personal contact information). [26-1049] (Dunbar, Kelly) [Entered: 05/08/2026 09:10 AM]

FORM 72 submitted by arguing attorney, Sharon Swingle, on behalf of Respondents Peter B. Hegseth and United States Department of War (For Internal Use Only: Form is restricted to protect counsel's personal contact information). [26-1049] (Swingle, Sharon) [Entered: 05/08/2026 09:49 AM]

LETTER [2172918] Update statements in response brief and declaration filed by Peter B. Hegseth and United States Department of War [Service Date: 05/12/2026 ] [26-1049] (Swingle, Sharon) [Entered: 05/12/2026 11:24 AM]

NOTICE [2172982] to withdraw attorney Alexander A. Berengaut who represented Former Service Secretaries and Retired Senior Military Officers in 26-1049 filed by Former Service Secretaries and Retired Senior Military Officers [Service Date: 05/12/2026 ] [26-1049] (Berengaut, Alexander) [Entered: 05/12/2026 03:01 PM]

PETITIONER REPLY BRIEF [2173124] filed by Anthropic PBC [Service Date: 05/13/2026 ] Length of Brief: 6,465 words. [26-1049] (Dunbar, Kelly) [Entered: 05/13/2026 01:39 PM]

ORAL ARGUMENT HELD before Judges Henderson, Katsas and Rao. [26-1049] [Entered: 05/19/2026 03:41 PM]

PER CURIAM ORDER [2174506] filed on the court’s own motion, that the parties file supplemental briefs (see order for details). The supplemental briefs, not to exceed 2,500 words, are due by 4:00 p.m. on May 28, 2026. In addition to filing electronically, the parties are directed to hand-deliver the paper copies of their submissions to the court by the time and date due. Before Judges: Henderson, Katsas and Rao. [26-1049] [Entered: 05/21/2026 03:04 PM]

JOINT UNOPPOSED MOTION [2174576] to extend time to file brief to 06/04/2026 filed by Peter B. Hegseth, United States Department of War and Anthropic PBC [Service Date: 05/21/2026 ] Length Certification: 357 words. [26-1049] (Janda, Sean) [Entered: 05/21/2026 09:56 PM]

PER CURIAM ORDER [2174795] filed granting joint motionfor extension of time [2174576-2]. The parties' supplemental briefs are now due by 4:00 p.m. on 06/04/2026. Before Judges: Henderson, Katsas and Rao. [26-1049] [Entered: 05/22/2026 06:03 PM]

MOTION [2176974] to participate as amicus curiae [Disclosure Listing: Not Attached] lodged by Human Flag Association [Service Date: 06/05/2026 ] [26-1049][Edited 06/05/2026 by EBL--MODIFIED EVENT FROM FILED TO LODGED] [Entered: 06/05/2026 10:29 AM]

AMICUS BRIEF [2176978] lodged by Human Flag Association [Service Date: 06/05/2026 ] Length of Brief: 12 Pages. [26-1049] [Entered: 06/05/2026 10:38 AM]

AMICUS BRIEF 2176978 lodged by Human Flag Association [Service Date: 06/05/2026 ] Length of Brief: 12 Pages. [26-1049] [Entered: 06/05/2026 10:38 AM]

PETITIONER SUPPLEMENTAL BRIEF [2176752] filed by Anthropic PBC [Service Date: 06/04/2026 ] Length of Brief: 2,499 Words. [26-1049] (Dunbar, Kelly) [Entered: 06/04/2026 12:22 PM]

RESPONDENT SUPPLEMENTAL BRIEF [2176767] filed by Peter B. Hegseth and United States Department of War [Service Date: 06/04/2026 ] Length of Brief: 2316 words. [26-1049] (Springer, Brian) [Entered: 06/04/2026 12:44 PM]

LETTER [2176887] Regarding Petitioner's Receipt of the Government's Decision Regarding Reconsideration of Determination filed by Anthropic PBC [Service Date: 06/04/2026 ] [26-1049] (Dunbar, Kelly) [Entered: 06/04/2026 06:01 PM]

PER CURIAM ORDER [2177388] filed denying motion of Human Flag Association for leave to file a brief amicus curiae out of time [2176974-2] The Clerk is directed to note the docket accordingly. Before Judges: Henderson, Katsas and Rao. [26-1049] [Entered: 06/08/2026 12:27 PM]