Altimmune ALT SEC Filings

NASDAQ ALT
$1.93 -0.01 (-0.52%)
At close: Nov 11, 2026 · 4:00 PM EST
EDGAR Disclosures

SEC Filings

Source SEC EDGAR

Every SEC filing Altimmune, Inc. (ALT) has made, as reported on EDGAR — annual and quarterly reports, current reports, insider transactions and ownership disclosures. Filter by form group, form type or period, and open any filing or its index directly.

Form Type
# Form Type Form Group Accession Date Filing Index
14Insider Transaction0001363683-26-000009Nov 4, 2026 9:08 PM
23Insider Transaction0001363683-26-000007Nov 4, 2026 9:07 PM
34Insider Transaction0001795798-26-000009Nov 4, 2026 9:04 PM
43Insider Transaction0001795798-26-000007Nov 4, 2026 9:02 PM
58-KCurrent Report0001326190-26-000060Oct 29, 2026 11:03 AM
68-KCurrent Report0001104659-26-118991Oct 27, 2026 12:16 PM
74Insider Transaction0001802615-26-000002Oct 5, 2026 12:10 AM
84Insider Transaction0001251779-26-000011Oct 5, 2026 12:05 AM
94Insider Transaction0002156820-26-000004Oct 2, 2026 12:17 AM
103Insider Transaction0002156820-26-000003Oct 2, 2026 12:15 AM
118-KCurrent Report0001326190-26-000056Sep 29, 2026 7:03 AM
124Insider Transaction0001595064-26-000002Sep 17, 2026 8:05 PM
134Insider Transaction0001698665-26-000007Aug 13, 2026 8:05 PM
1410-QQuarterly & Annual Report0001326190-26-000052Aug 12, 2026 8:04 PM
158-KCurrent Report0001326190-26-000049Aug 12, 2026 11:33 AM
164Insider Transaction0001251779-26-000009Aug 3, 2026 8:05 PM
174Insider Transaction0001705905-26-000010Aug 3, 2026 8:05 PM
188-KCurrent Report0001326190-26-000044Jul 28, 2026 11:04 AM
198-KCurrent Report0001104659-26-074575Jun 16, 2026 8:05 PM
20SCHEDULE 13GBeneficial Ownership Report0001214659-26-006495May 15, 2026 8:15 PM
21S-8Prospectus0001326190-26-000041May 13, 2026 8:17 PM
2210-QQuarterly & Annual Report0001326190-26-000040May 13, 2026 8:13 PM
238-KCurrent Report0001326190-26-000037May 13, 2026 11:34 AM
24SCHEDULE 13GBeneficial Ownership Report0000093751-26-000201May 12, 2026 1:46 PM
25SCHEDULE 13GBeneficial Ownership Report0000905148-26-002008May 1, 2026 9:38 PM
26SCHEDULE 13GBeneficial Ownership Report0001193125-26-201587May 1, 2026 8:36 PM
274Insider Transaction0001960596-26-000002May 1, 2026 8:23 PM
284Insider Transaction0001555132-26-000008May 1, 2026 8:20 PM
294Insider Transaction0001527204-26-000002May 1, 2026 8:18 PM
304Insider Transaction0001705904-26-000002May 1, 2026 8:16 PM
314Insider Transaction0001743611-26-000004May 1, 2026 8:13 PM
324Insider Transaction0001705562-26-000002May 1, 2026 8:11 PM
33SCHEDULE 13GBeneficial Ownership Report0001346824-26-000125May 1, 2026 8:10 PM
344Insider Transaction0001409939-26-000004May 1, 2026 8:08 PM
354Insider Transaction0001201196-26-000002May 1, 2026 8:05 PM
36SCHEDULE 13GBeneficial Ownership Report0001172661-26-001579Apr 30, 2026 8:00 PM
378-KCurrent Report0001104659-26-048552Apr 24, 2026 8:05 PM
38424B5Prospectus0001104659-26-047979Apr 24, 2026 1:29 AM
39S-3MEFProspectus0001104659-26-047053Apr 22, 2026 1:15 AM
40424B5Prospectus0001326190-26-000031Apr 22, 2026 9:24 PM
418-KCurrent Report0001326190-26-000027Apr 16, 2026 9:07 PM
424Insider Transaction0001409939-26-000002Apr 6, 2026 8:05 PM
434Insider Transaction0001251779-26-000007Apr 1, 2026 8:05 PM
444Insider Transaction0001698665-26-000005Apr 1, 2026 8:05 PM
45SCHEDULE 13GBeneficial Ownership Report0000102909-26-000549Mar 26, 2026 7:23 PM
46ARSOthers0001104659-26-028963Mar 17, 2026 11:13 AM
47DEF 14AOthers0001104659-26-028953Mar 17, 2026 11:05 AM
484Insider Transaction0001251779-26-000005Mar 9, 2026 11:05 AM
494Insider Transaction0001698665-26-000003Mar 9, 2026 11:00 AM
50PRE 14AOthers0001326190-26-000020Mar 6, 2026 1:01 PM
...

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