Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-32587 ALTIMMUNE, INC. (Exact name of registrant as specified in its charter) Identification No.) (I.R.S.Employer T ...

Altimmune, Inc. (NASDAQ:ALT) Q3 2022 Earnings Conference Call November 10, 2022 8:30 AM ET Company Participants Richard Eisenstadt - CFO Vipin Garg - President & CEO Scot Roberts - Chief Scientific Officer Scott Harris - Chief Medical Officer Conference Call Participants Seamus Fernandez - Guggenheim Yasmeen Rahimi - Piper Sandler Liisa Bayko - Evercore ISI Mayank Mamtani - B. Riley Jon Wolleben - JMP Securities Operator Good day, ladies and gentlemen, and welcome to the Altimmune, Inc. Third Quarter Financ ...

Altimmune, Inc. (NASDAQ:ALT) Q2 2022 Results Conference Call August 11, 2022 8:30 AM ET Company Participants Richard Eisenstadt - Chief Financial Officer Vipin Garg - President and Chief Executive Officer Scot Roberts - Chief Scientific Officer Scott Harris - Chief Medical Officer Conference Call Participants Seamus Fernandez - Guggenheim Yasmeen Rahimi - Piper Sandler Roger Song - Jefferies Mayank Mamtani - B. Riley Jon Welandon - JMP Securities Patrick Trucchio - H.C. Wainwright Operator Good day, ladies ...

Altimmune, Inc. (NASDAQ:ALT) Q1 2022 Earnings Conference Call May 12, 2022 8:30 AM ET Company Participants Vipin K. Garg – President and Chief Executive Officer Richard Eisenstadt – Chief Financial Officer Scot Roberts – Chief Scientific Officer Scott M. Harris – Chief Medical Officer Conference Call Participants Seamus Fernandez – Guggenheim Partners Yasmeen Rahimi – Piper Sandler Companies Liisa Bayko – Evercore ISI Mayank Mamtani – B. Riley Securities Jonathan Wolleben – JMP Securities LLC Operator [Oper ...

Start Time: 08:30 January 1, 0000 9:16 AM ET Altimmune, Inc. (NASDAQ:ALT) Q4 2021 Earnings Conference Call March 15, 2022, 08:30 AM ET Company Participants Vipin Garg - President and CEO Richard Eisenstadt - CFO Scot Roberts - Chief Scientific Officer Scott Harris - Chief Medical Officer Conference Call Participants Seamus Fernandez - Guggenheim Yasmeen Rahimi - Piper Sandler Roger Song - Jefferies Jon Wolleben - JMP Securities Mayank Mamtani - B. Riley Securities Patrick Trucchio - H.C. Wainwright Operator ...