ALT

Altimmune, Inc.

Insider trading activity for Altimmune, Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

+$44.3K

net buying

Bought(1 · 1 insiders): $44.3K
Sold(0 · 0 insiders): $0

Past 6 months

+$154.2K

net buying

Bought(4 · 3 insiders): $154.2K
Sold(0 · 0 insiders): $0

Past 12 months

+$370K

net buying

Bought(11 · 6 insiders): $370K
Sold(0 · 0 insiders): $0

Transaction history

The 85 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 16	Richardson Linda M	Chief Commercial Officer	MEXER◆	24,000	—	—	—	Open the original filing on SEC.gov
Sep 16	Richardson Linda M	Chief Commercial Officer	FTAX	6,826	$3.24	$22.1K	-28.4%	Open the original filing on SEC.gov
Sep 16	Richardson Linda M	Chief Commercial Officer	MEXER	24,000	—	—	—	Open the original filing on SEC.gov
Aug 13	Durso Jerome Benedict	President and CEO	PBUY	15,000	$2.95	$44.3K	+31.6%	Open the original filing on SEC.gov
Jul 31	Roberts M Scot	Chief Scientific Officer	AGRANT	875	$2.41	$2.1K	+0.8%	Open the original filing on SEC.gov
Jul 31	Weaver Gregory L	Chief Financial Officer	AGRANT	1,753	$2.41	$4.2K	+4.6%	Open the original filing on SEC.gov
May 1	Lawver Teri L	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
May 1	Pisano Wayne	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
May 1	Schafer Klaus	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
May 1	Hodges Philip	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
May 1	Sohn Catherine A.	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
May 1	Jorkasky Diane	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
May 1	Gill John	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
May 1	Sayare Mitchel	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Apr 6	Gill John	Director	PBUY↓	9,200	$3.41	$31.3K	+73.6%	Open the original filing on SEC.gov
Apr 1	Durso Jerome Benedict	President and CEO	PBUY	15,000	$3.14	$47.1K	+46.2%	Open the original filing on SEC.gov
Apr 1	Weaver Gregory L	Chief Financial Officer	PBUY	10,000	$3.15	$31.5K	+35.6%	Open the original filing on SEC.gov
Mar 6	Durso Jerome Benedict	President and CEO	PBUY	20,000	$3.54	$70.8K	+160.0%	Open the original filing on SEC.gov
Mar 6	Weaver Gregory L	Chief Financial Officer	PBUY★	5,000	$3.54	$17.7K	+21.7%	Open the original filing on SEC.gov
Feb 26	Roberts M Scot	Chief Scientific Officer	AGRANT◆	95,430	—	—	—	Open the original filing on SEC.gov
Feb 26	Roberts M Scot	Chief Scientific Officer	AGRANT◆	222,670	—	—	—	Open the original filing on SEC.gov
Feb 26	Weaver Gregory L	Chief Financial Officer	AGRANT◆	111,000	—	—	—	Open the original filing on SEC.gov
Feb 26	Weaver Gregory L	Chief Financial Officer	AGRANT◆	259,000	—	—	—	Open the original filing on SEC.gov
Feb 2	Roberts M Scot	Chief Scientific Officer	MEXER◆	7,775	—	—	—	Open the original filing on SEC.gov
Feb 2	Roberts M Scot	Chief Scientific Officer	FTAX	2,329	$5.55	$12.9K	-2.0%	Open the original filing on SEC.gov
Feb 2	Roberts M Scot	Chief Scientific Officer	MEXER	7,775	—	—	+7.2%	Open the original filing on SEC.gov
Jan 31	Jordt Raymond M	Chief Business Officer	AGRANT	4,571	$3.07	$14K	+7.0%	Open the original filing on SEC.gov
Jan 31	Garg Vipin K	Director	AGRANT	6,926	$3.07	$21.3K	+1.7%	Open the original filing on SEC.gov
Jan 31	Roberts M Scot	Chief Scientific Officer	AGRANT	5,567	$3.07	$17.1K	+5.5%	Open the original filing on SEC.gov
Jan 30	Garg Vipin K	Director	MEXER◆	26,775	—	—	—	Open the original filing on SEC.gov
Jan 30	Garg Vipin K	Director	FTAX	11,632	$5.60	$65.1K	-2.7%	Open the original filing on SEC.gov
Jan 30	Garg Vipin K	Director	MEXER	26,775	—	—	+6.7%	Open the original filing on SEC.gov
Jan 30	Roberts M Scot	Chief Scientific Officer	MEXER◆	9,275	—	—	—	Open the original filing on SEC.gov
Jan 30	Roberts M Scot	Chief Scientific Officer	FTAX	2,859	$5.60	$16K	-2.7%	Open the original filing on SEC.gov
Jan 30	Roberts M Scot	Chief Scientific Officer	MEXER	9,275	—	—	+9.7%	Open the original filing on SEC.gov
Jan 27	Jordt Raymond M	Chief Business Officer	MEXER◆	15,850	—	—	—	Open the original filing on SEC.gov
Jan 27	Jordt Raymond M	Chief Business Officer	FTAX	4,229	$6.18	$26.1K	-6.1%	Open the original filing on SEC.gov
Jan 27	Jordt Raymond M	Chief Business Officer	MEXER	15,850	—	—	+29.4%	Open the original filing on SEC.gov
Jan 27	Roberts M Scot	Chief Scientific Officer	MEXER◆	15,850	—	—	—	Open the original filing on SEC.gov
Jan 27	Roberts M Scot	Chief Scientific Officer	FTAX	4,748	$6.18	$29.3K	-4.7%	Open the original filing on SEC.gov
Jan 27	Roberts M Scot	Chief Scientific Officer	MEXER	15,850	—	—	+18.8%	Open the original filing on SEC.gov
Jan 27	Garg Vipin K	Director	MEXER◆	41,200	—	—	—	Open the original filing on SEC.gov
Jan 27	Garg Vipin K	Director	FTAX	17,898	$6.18	$110.6K	-4.3%	Open the original filing on SEC.gov
Jan 27	Garg Vipin K	Director	MEXER	41,200	—	—	+10.9%	Open the original filing on SEC.gov
Jan 25	Jordt Raymond M	Chief Business Officer	MEXER◆	14,600	—	—	—	Open the original filing on SEC.gov
Jan 25	Jordt Raymond M	Chief Business Officer	FTAX	3,855	$5.50	$21.2K	-6.7%	Open the original filing on SEC.gov
Jan 25	Jordt Raymond M	Chief Business Officer	MEXER	14,600	—	—	+33.8%	Open the original filing on SEC.gov
Jan 25	Roberts M Scot	Chief Scientific Officer	MEXER◆	14,600	—	—	—	Open the original filing on SEC.gov
Jan 25	Roberts M Scot	Chief Scientific Officer	FTAX	4,373	$5.50	$24.1K	-4.9%	Open the original filing on SEC.gov
Jan 25	Roberts M Scot	Chief Scientific Officer	MEXER	14,600	—	—	+19.7%	Open the original filing on SEC.gov
Jan 25	Garg Vipin K	Director	MEXER◆	42,050	—	—	—	Open the original filing on SEC.gov
Jan 25	Garg Vipin K	Director	FTAX	17,984	$5.50	$98.9K	-4.5%	Open the original filing on SEC.gov
Jan 25	Garg Vipin K	Director	MEXER	42,050	—	—	+11.8%	Open the original filing on SEC.gov
Jan 8	Pisano Wayne	Director	PBUY★	5,000	$4.08	$20.4K	+58.8%	Open the original filing on SEC.gov
Jan 5	Sohn Catherine A.	Director	PBUY★	500	$4.24	$2.1K	+50.0%	Open the original filing on SEC.gov
Jan 1	Jordt Raymond M	Chief Business Officer	MEXER◆	9,375	—	—	—	Open the original filing on SEC.gov
Jan 1	Jordt Raymond M	Chief Business Officer	FTAX	2,475	$3.61	$8.9K	-5.4%	Open the original filing on SEC.gov
Jan 1	Jordt Raymond M	Chief Business Officer	MEXER	9,375	—	—	+25.9%	Open the original filing on SEC.gov
Dec 29, 2025	Jorkasky Diane	Director	PBUY★	527	$3.80	$2K	—	Open the original filing on SEC.gov
Dec 23, 2025	Gill John	Director	PBUY★	12,500	$4.10	$51.3K	—	Open the original filing on SEC.gov
Dec 22, 2025	Durso Jerome Benedict	Director	PBUY★	12,500	$4.13	$51.6K	—	Open the original filing on SEC.gov
Dec 1, 2025	Durso Jerome Benedict	CEO-elect	AGRANT◆	633,700	—	—	—	Open the original filing on SEC.gov
Dec 1, 2025	Durso Jerome Benedict	CEO-elect	AGRANT◆	1.8M	—	—	—	Open the original filing on SEC.gov
Nov 11, 2025	Weaver Gregory L	Chief Financial Officer	MEXER◆	18,750	—	—	—	Open the original filing on SEC.gov
Nov 11, 2025	Weaver Gregory L	Chief Financial Officer	FTAX	5,672	$4.28	$24.3K	-19.7%	Open the original filing on SEC.gov
Nov 11, 2025	Weaver Gregory L	Chief Financial Officer	MEXER	18,750	—	—	+187.5%	Open the original filing on SEC.gov
Oct 1, 2025	Weaver Gregory L	Chief Financial Officer	AGRANT◆	57,900	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Weaver Gregory L	Chief Financial Officer	AGRANT◆	166,800	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Arbet-Engels Christophe	Chief Medical Officer	AGRANT◆	150,000	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Arbet-Engels Christophe	Chief Medical Officer	AGRANT◆	450,000	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Sohn Catherine A.	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Durso Jerome Benedict	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Lawver Teri L	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Jorkasky Diane	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Gill John	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Schafer Klaus	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Sayare Mitchel	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Hodges Philip	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 25, 2025	Pisano Wayne	Director	AGRANT◆	48,800	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Richardson Linda M	Chief Commercial Officer	AGRANT◆	96,000	—	—	—	Open the original filing on SEC.gov
Sep 16, 2025	Richardson Linda M	Chief Commercial Officer	AGRANT◆	278,000	—	—	—	Open the original filing on SEC.gov
Jul 31, 2025	Jordt Raymond M	Chief Business Officer	AGRANT	1,368	$3.14	$4.3K	+3.9%	Open the original filing on SEC.gov
Jul 31, 2025	Harris Matthew Scott	Chief Medical Officer	AGRANT	2,018	$3.14	$6.3K	+14.3%	Open the original filing on SEC.gov
Jul 31, 2025	Roberts M Scot	Chief Scientific Officer	AGRANT	846	$3.14	$2.7K	+1.2%	Open the original filing on SEC.gov
Jan 6, 2022	Gill John	Director	GGIFT	2,714	—	—	-100.0%	Open the original filing on SEC.gov

MEXER◆—

Richardson Linda M · Chief Commercial…Sep 16

24,000 sh

FTAX$22.1K

Richardson Linda M · Chief Commercial…Sep 16

6,826 sh @ $3.24 · -28.4% own

MEXER—

Richardson Linda M · Chief Commercial…Sep 16

24,000 sh

PBUY$44.3K

Durso Jerome Benedict · President and CEOAug 13

15,000 sh @ $2.95 · +31.6% own

AGRANT$2.1K

Roberts M Scot · Chief Scientific…Jul 31

875 sh @ $2.41 · +0.8% own

AGRANT$4.2K

Weaver Gregory L · Chief Financial…Jul 31

1,753 sh @ $2.41 · +4.6% own

AGRANT◆—

Lawver Teri L · DirectorMay 1

48,800 sh

AGRANT◆—

Pisano Wayne · DirectorMay 1

48,800 sh

AGRANT◆—

Schafer Klaus · DirectorMay 1

48,800 sh

AGRANT◆—

Hodges Philip · DirectorMay 1

48,800 sh

AGRANT◆—

Sohn Catherine A. · DirectorMay 1

48,800 sh

AGRANT◆—

Jorkasky Diane · DirectorMay 1

48,800 sh

AGRANT◆—

Gill John · DirectorMay 1

48,800 sh

AGRANT◆—

Sayare Mitchel · DirectorMay 1

48,800 sh

PBUY↓$31.3K

Gill John · DirectorApr 6

9,200 sh @ $3.41 · +73.6% own

PBUY$47.1K

Durso Jerome Benedict · President and CEOApr 1

15,000 sh @ $3.14 · +46.2% own

PBUY$31.5K

Weaver Gregory L · Chief Financial…Apr 1

10,000 sh @ $3.15 · +35.6% own

PBUY$70.8K

Durso Jerome Benedict · President and CEOMar 6

20,000 sh @ $3.54 · +160.0% own

PBUY★$17.7K

Weaver Gregory L · Chief Financial…Mar 6

5,000 sh @ $3.54 · +21.7% own

AGRANT◆—

Roberts M Scot · Chief Scientific…Feb 26

95,430 sh

AGRANT◆—

Roberts M Scot · Chief Scientific…Feb 26

222,670 sh

AGRANT◆—

Weaver Gregory L · Chief Financial…Feb 26

111,000 sh

AGRANT◆—

Weaver Gregory L · Chief Financial…Feb 26

259,000 sh

MEXER◆—

Roberts M Scot · Chief Scientific…Feb 2

7,775 sh

FTAX$12.9K

Roberts M Scot · Chief Scientific…Feb 2

2,329 sh @ $5.55 · -2.0% own

MEXER—

Roberts M Scot · Chief Scientific…Feb 2

7,775 sh · +7.2% own

AGRANT$14K

Jordt Raymond M · Chief Business…Jan 31

4,571 sh @ $3.07 · +7.0% own

AGRANT$21.3K

Garg Vipin K · DirectorJan 31

6,926 sh @ $3.07 · +1.7% own

AGRANT$17.1K

Roberts M Scot · Chief Scientific…Jan 31

5,567 sh @ $3.07 · +5.5% own

MEXER◆—

Garg Vipin K · DirectorJan 30

26,775 sh

FTAX$65.1K

Garg Vipin K · DirectorJan 30

11,632 sh @ $5.60 · -2.7% own

MEXER—

Garg Vipin K · DirectorJan 30

26,775 sh · +6.7% own

MEXER◆—

Roberts M Scot · Chief Scientific…Jan 30

9,275 sh

FTAX$16K

Roberts M Scot · Chief Scientific…Jan 30

2,859 sh @ $5.60 · -2.7% own

MEXER—

Roberts M Scot · Chief Scientific…Jan 30

9,275 sh · +9.7% own

MEXER◆—

Jordt Raymond M · Chief Business…Jan 27

15,850 sh

FTAX$26.1K

Jordt Raymond M · Chief Business…Jan 27

4,229 sh @ $6.18 · -6.1% own

MEXER—

Jordt Raymond M · Chief Business…Jan 27

15,850 sh · +29.4% own

MEXER◆—

Roberts M Scot · Chief Scientific…Jan 27

15,850 sh

FTAX$29.3K

Roberts M Scot · Chief Scientific…Jan 27

4,748 sh @ $6.18 · -4.7% own

MEXER—

Roberts M Scot · Chief Scientific…Jan 27

15,850 sh · +18.8% own

MEXER◆—

Garg Vipin K · DirectorJan 27

41,200 sh

FTAX$110.6K

Garg Vipin K · DirectorJan 27

17,898 sh @ $6.18 · -4.3% own

MEXER—

Garg Vipin K · DirectorJan 27

41,200 sh · +10.9% own

MEXER◆—

Jordt Raymond M · Chief Business…Jan 25

14,600 sh

FTAX$21.2K

Jordt Raymond M · Chief Business…Jan 25

3,855 sh @ $5.50 · -6.7% own

MEXER—

Jordt Raymond M · Chief Business…Jan 25

14,600 sh · +33.8% own

MEXER◆—

Roberts M Scot · Chief Scientific…Jan 25

14,600 sh

FTAX$24.1K

Roberts M Scot · Chief Scientific…Jan 25

4,373 sh @ $5.50 · -4.9% own

MEXER—

Roberts M Scot · Chief Scientific…Jan 25

14,600 sh · +19.7% own

MEXER◆—

Garg Vipin K · DirectorJan 25

42,050 sh

FTAX$98.9K

Garg Vipin K · DirectorJan 25

17,984 sh @ $5.50 · -4.5% own

MEXER—

Garg Vipin K · DirectorJan 25

42,050 sh · +11.8% own

PBUY★$20.4K

Pisano Wayne · DirectorJan 8

5,000 sh @ $4.08 · +58.8% own

PBUY★$2.1K

Sohn Catherine A. · DirectorJan 5

500 sh @ $4.24 · +50.0% own

MEXER◆—

Jordt Raymond M · Chief Business…Jan 1

9,375 sh

FTAX$8.9K

Jordt Raymond M · Chief Business…Jan 1

2,475 sh @ $3.61 · -5.4% own

MEXER—

Jordt Raymond M · Chief Business…Jan 1

9,375 sh · +25.9% own

PBUY★$2K

Jorkasky Diane · DirectorDec 29, 2025

527 sh @ $3.80

PBUY★$51.3K

Gill John · DirectorDec 23, 2025

12,500 sh @ $4.10

PBUY★$51.6K

Durso Jerome Benedict · DirectorDec 22, 2025

12,500 sh @ $4.13

AGRANT◆—

Durso Jerome Benedict · CEO-electDec 1, 2025

633,700 sh

AGRANT◆—

Durso Jerome Benedict · CEO-electDec 1, 2025

1.8M sh

MEXER◆—

Weaver Gregory L · Chief Financial…Nov 11, 2025

18,750 sh

FTAX$24.3K

Weaver Gregory L · Chief Financial…Nov 11, 2025

5,672 sh @ $4.28 · -19.7% own

MEXER—

Weaver Gregory L · Chief Financial…Nov 11, 2025

18,750 sh · +187.5% own

AGRANT◆—

Weaver Gregory L · Chief Financial…Oct 1, 2025

57,900 sh

AGRANT◆—

Weaver Gregory L · Chief Financial…Oct 1, 2025

166,800 sh

AGRANT◆—

Arbet-Engels Christophe · Chief Medical…Oct 1, 2025

150,000 sh

AGRANT◆—

Arbet-Engels Christophe · Chief Medical…Oct 1, 2025

450,000 sh

AGRANT◆—

Sohn Catherine A. · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Durso Jerome Benedict · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Lawver Teri L · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Jorkasky Diane · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Gill John · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Schafer Klaus · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Sayare Mitchel · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Hodges Philip · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Pisano Wayne · DirectorSep 25, 2025

48,800 sh

AGRANT◆—

Richardson Linda M · Chief Commercial…Sep 16, 2025

96,000 sh

AGRANT◆—

Richardson Linda M · Chief Commercial…Sep 16, 2025

278,000 sh

AGRANT$4.3K

Jordt Raymond M · Chief Business…Jul 31, 2025

1,368 sh @ $3.14 · +3.9% own

AGRANT$6.3K

Harris Matthew Scott · Chief Medical…Jul 31, 2025

2,018 sh @ $3.14 · +14.3% own

AGRANT$2.7K

Roberts M Scot · Chief Scientific…Jul 31, 2025

846 sh @ $3.14 · +1.2% own

GGIFT—

Gill John · DirectorJan 6, 2022

2,714 sh · -100.0% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

1 of 35 filings we hold was filed after the two-business-day deadline. The furthest past the deadline was 929 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Jan 6, 2022	Sep 28, 2025	Gill JohnDirector	929days · about 3.7 years	—	Filing ↗

Gill JohnDirector

929days · about 3.7 years

Traded Jan 6, 2022 · filed Sep 28, 2025Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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