Stocks
ALT Altimmune, Inc.

ALT

Altimmune, Inc.

Company with tickers: ALT

CIK

1326190

CUSIP

02155H200

Shares Outstanding

194,474,154

Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades

Date	Insider	Role	Type	Shares	Price	Value	After
2026-05-01	Lawver Teri L	SVP & Chief Commercial Officer	Award	48,800	—	—	48,800
2026-05-01	Jorkasky Diane	Director	Award	48,800	—	—	48,800
2026-05-01	Pisano Wayne	Director	Award	48,800	—	—	48,800
2026-05-01	GILL JOHN	Director	Award	48,800	—	—	48,800
2026-05-01	SAYARE MITCHEL	Director	Award	48,800	—	—	48,800
2026-05-01	Sohn Catherine A.	Director	Award	48,800	—	—	48,800
2026-05-01	Schafer Klaus	Director	Award	48,800	—	—	48,800
2026-05-01	Hodges Philip	Director	Award	48,800	—	—	48,800
2026-04-06	GILL JOHN	Director	Buy	9,200	$3.41	$31,350	21,700
2026-04-01	WEAVER GREGORY L	Insider	Buy	10,000	$3.15	$31,499	38,078
2026-04-01	Durso Jerome Benedict	Director, President and CEO	Buy	15,000	$3.14	$47,100	47,500
2026-03-06	WEAVER GREGORY L	Insider	Buy	5,000	$3.54	$17,700	28,078
2026-03-06	Durso Jerome Benedict	Director, President and CEO	Buy	20,000	$3.54	$70,790	32,500
2026-02-26	Roberts M Scot	Chief Scientific Officer	Award	95,430	—	—	95,430
2026-02-26	Roberts M Scot	Chief Scientific Officer	Award	222,670	—	—	222,670
2026-02-26	WEAVER GREGORY L	Insider	Award	259,000	—	—	259,000
2026-02-26	WEAVER GREGORY L	Insider	Award	111,000	—	—	111,000
2026-02-02	Roberts M Scot	Chief Scientific Officer	Convert	7,775	—	—	115,153
2026-02-02	Roberts M Scot	Chief Scientific Officer	Convert	7,775	—	—	0
2026-02-02	Roberts M Scot	Chief Scientific Officer	Tax	2,329	$5.55	$12,926	112,824
2026-01-31	Roberts M Scot	Chief Scientific Officer	Award	5,567	$3.07	$17,091	107,378
2026-01-31	Jordt Raymond M	Chief Business Officer	Award	4,571	$3.07	$14,033	70,107
2026-01-31	Garg Vipin K	Director	Award	6,926	$3.07	$21,263	424,519
2026-01-30	Roberts M Scot	Chief Scientific Officer	Convert	9,275	—	—	104,670
2026-01-30	Roberts M Scot	Chief Scientific Officer	Tax	2,859	$5.60	$16,010	101,811
2026-01-30	Roberts M Scot	Chief Scientific Officer	Convert	9,275	—	—	9,275
2026-01-30	Garg Vipin K	Director	Convert	26,775	—	—	429,225
2026-01-30	Garg Vipin K	Director	Convert	26,775	—	—	26,775
2026-01-30	Garg Vipin K	Director	Tax	11,632	$5.60	$65,139	417,593
2026-01-27	Garg Vipin K	Director	Convert	41,200	—	—	123,600
2026-01-27	Garg Vipin K	Director	Tax	17,898	$6.18	$110,610	402,450
2026-01-27	Garg Vipin K	Director	Convert	41,200	—	—	420,348
2026-01-27	Jordt Raymond M	Chief Business Officer	Tax	4,229	$6.18	$26,135	65,536
2026-01-27	Jordt Raymond M	Chief Business Officer	Convert	15,850	—	—	69,765
2026-01-27	Jordt Raymond M	Chief Business Officer	Convert	15,850	—	—	47,550
2026-01-27	Roberts M Scot	Chief Scientific Officer	Tax	4,748	$6.18	$29,343	95,395
2026-01-27	Roberts M Scot	Chief Scientific Officer	Convert	15,850	—	—	100,143
2026-01-27	Roberts M Scot	Chief Scientific Officer	Convert	15,850	—	—	47,550
2026-01-25	Jordt Raymond M	Chief Business Officer	Convert	14,600	—	—	29,200
2026-01-25	Jordt Raymond M	Chief Business Officer	Convert	14,600	—	—	57,770
2026-01-25	Jordt Raymond M	Chief Business Officer	Tax	3,855	$5.50	$21,203	53,915
2026-01-25	Roberts M Scot	Chief Scientific Officer	Convert	14,600	—	—	88,666
2026-01-25	Garg Vipin K	Director	Convert	42,050	—	—	397,132
2026-01-25	Garg Vipin K	Director	Tax	17,984	$5.50	$98,912	379,148
2026-01-25	Garg Vipin K	Director	Convert	42,050	—	—	84,100
2026-01-25	Roberts M Scot	Chief Scientific Officer	Tax	4,373	$5.50	$24,052	84,293
2026-01-25	Roberts M Scot	Chief Scientific Officer	Convert	14,600	—	—	29,200
2026-01-08	Pisano Wayne	Director	Buy	5,000	$4.08	$20,410	13,498
2026-01-05	Sohn Catherine A.	Director	Buy	500	$4.24	$2,118	1,500
2026-01-01	Jordt Raymond M	Chief Business Officer	Convert	9,375	—	—	9,375
2026-01-01	Jordt Raymond M	Chief Business Officer	Tax	2,475	$3.61	$8,935	43,170
2026-01-01	Jordt Raymond M	Chief Business Officer	Convert	9,375	—	—	45,645
2025-12-29	Jorkasky Diane	Director	Buy	527	$3.80	$2,003	527
2025-12-23	GILL JOHN	Director	Buy	12,500	$4.10	$51,250	12,500
2025-12-22	Durso Jerome Benedict	Director, President and CEO	Buy	12,500	$4.13	$51,569	12,500
2025-12-01	Durso Jerome Benedict	Director, President and CEO	Award	633,700	—	—	633,700
2025-12-01	Durso Jerome Benedict	Director, President and CEO	Award	1,824,400	—	—	1,824,400
2025-11-11	WEAVER GREGORY L	Insider	Convert	18,750	—	—	56,250
2025-11-11	WEAVER GREGORY L	Insider	Tax	5,672	$4.28	$24,276	23,078
2025-11-11	WEAVER GREGORY L	Insider	Convert	18,750	—	—	28,750
2025-10-01	Arbet-Engels Christophe	Chief Medical Officer	Award	150,000	—	—	150,000
2025-10-01	Arbet-Engels Christophe	Chief Medical Officer	Award	450,000	—	—	450,000
2025-10-01	WEAVER GREGORY L	Insider	Award	57,900	—	—	57,900
2025-10-01	WEAVER GREGORY L	Insider	Award	166,800	—	—	166,800
2025-10-01	Arbet-Engels Christophe	Chief Medical Officer	Other	0	—	—	0
2025-09-25	Durso Jerome Benedict	Director, President and CEO	Award	48,800	—	—	48,800
2025-09-25	Schafer Klaus	Director	Award	48,800	—	—	48,800
2025-09-25	Sohn Catherine A.	Director	Award	48,800	—	—	48,800
2025-09-25	Lawver Teri L	SVP & Chief Commercial Officer	Award	48,800	—	—	48,800
2025-09-25	Jorkasky Diane	Director	Award	48,800	—	—	48,800
2025-09-25	GILL JOHN	Director	Award	48,800	—	—	48,800
2025-09-25	SAYARE MITCHEL	Director	Award	48,800	—	—	48,800
2025-09-25	Hodges Philip	Director	Award	48,800	—	—	48,800
2025-09-25	Pisano Wayne	Director	Award	48,800	—	—	48,800
2025-09-16	Richardson Linda M	Chief Commercial Officer	Award	278,000	—	—	278,000
2025-09-16	Richardson Linda M	Chief Commercial Officer	Award	96,000	—	—	96,000
2025-09-16	Richardson Linda M	Chief Commercial Officer	Other	0	—	—	0
2025-07-31	Harris Matthew Scott	Chief Medical Officer	Award	2,018	$3.14	$6,337	16,087
2025-07-31	Harris Matthew Scott	Chief Medical Officer	Other	67,787	—	—	67,787
2025-07-31	Jordt Raymond M	Chief Business Officer	Award	1,368	$3.14	$4,296	36,270
2025-07-31	Roberts M Scot	Chief Scientific Officer	Award	846	$3.14	$2,656	74,066
2025-03-17	Sohn Catherine A.	Director	Buy	1,000	$5.78	$5,785	1,000
2025-03-13	WEAVER GREGORY L	Insider	Buy	10,000	$5.20	$51,996	10,000
2025-03-07	Harris Matthew Scott	Chief Medical Officer	Other	67,787	—	—	67,787
2025-03-07	Harris Matthew Scott	Chief Medical Officer	Gift	67,787	—	—	14,069
2025-02-24	Lawver Teri L	SVP & Chief Commercial Officer	Award	69,800	—	—	69,800
2025-02-24	Durso Jerome Benedict	Director, President and CEO	Award	69,800	—	—	69,800
2025-02-24	Lawver Teri L	SVP & Chief Commercial Officer	Other	0	—	—	0
2025-02-24	Durso Jerome Benedict	Director, President and CEO	Other	0	—	—	0
2025-02-06	Sohn Catherine A.	Director	Award	18,600	—	—	18,600
2025-02-02	Garg Vipin K	Director	Convert	18,950	—	—	363,364
2025-02-02	Garg Vipin K	Director	Tax	8,282	$6.64	$54,992	355,082
2025-02-02	Garg Vipin K	Director	Convert	18,950	—	—	18,950
2025-02-02	Harris Matthew Scott	Chief Medical Officer	Tax	2,708	$6.64	$17,981	81,856
2025-02-02	Harris Matthew Scott	Chief Medical Officer	Convert	7,775	—	—	7,775
2025-02-02	Harris Matthew Scott	Chief Medical Officer	Convert	7,775	—	—	84,564
2025-02-02	Roberts M Scot	Chief Scientific Officer	Convert	7,775	—	—	75,536
2025-02-02	Roberts M Scot	Chief Scientific Officer	Convert	7,775	—	—	7,775
2025-02-02	Roberts M Scot	Chief Scientific Officer	Tax	2,316	$6.64	$15,378	73,220
2025-02-01	Garg Vipin K	Director	Tax	7,231	$6.64	$48,014	344,414