Gregory L. Weaver

CIK: 0001251779

Transaction Breakdown

Open Market Buys (P)3 (21.4%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)2 (14.3%)

Derivative conversions

Awards (A)7 (50.0%)

Compensation grants

Other (G, F, J, C, D, …)2 (14.3%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

ALT

Altimmune, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (14 total)

ALT
Altimmune, Inc.
Oct 1, 2026
Exercise(M)
Direct
14.5K shares-
ALT
Altimmune, Inc.
Oct 1, 2026
Tax Payment(F)
Direct
4.4K shares at avg. $2.76$12K
ALT
Altimmune, Inc.
Jul 31, 2026
Award(A)
Direct
1.8K shares at avg. $2.41$4K
ALT
Altimmune, Inc.
Apr 1, 2026
Purchase(P)
Direct
10K shares at avg. $3.15$31K
ALT
Altimmune, Inc.
Mar 6, 2026
Purchase(P)
Direct
5K shares at avg. $3.54$18K
ALT
Altimmune, Inc.
Feb 26, 2026
Award(A)
Restricted Stock Units
Direct
111K shares-
ALT
Altimmune, Inc.
Feb 26, 2026
Award(A)
Stock Options (option to buy)
Direct
259K shares-
ALT
Altimmune, Inc.
Nov 11, 2025
Exercise(M)
Direct
18.8K shares-
ALT
Altimmune, Inc.
Nov 11, 2025
Tax Payment(F)
Direct
5.7K shares at avg. $4.28$24K
ALT
Altimmune, Inc.
Oct 1, 2025
Award(A)
Restricted Stock Units
Direct
57.9K shares-
ALT
Altimmune, Inc.
Oct 1, 2025
Award(A)
Stock Options (option to buy)
Direct
166.8K shares-
ALT
Altimmune, Inc.
Mar 13, 2025
Purchase(P)
Direct
10K shares at avg. $5.20$52K
ALT
Altimmune, Inc.
Nov 11, 2024
Award(A)
Stock Options (option to buy)
Direct
225K shares-
ALT
Altimmune, Inc.
Nov 11, 2024
Award(A)
Restricted Stock Units
Direct
75K shares-

		Type	Shares	Price		Ownership
Oct 1, 2026	ALT Altimmune, Inc.	Exercise(M)	14,475	-	$0	Direct
Oct 1, 2026	ALT Altimmune, Inc.	Tax Payment(F)	4,379	$2.76	$12,086	Direct
Jul 31, 2026	ALT Altimmune, Inc.	Award(A)	1,753	$2.41	$4,232	Direct
Apr 1, 2026	ALT Altimmune, Inc.	Purchase(P)	10,000	$3.15	$31,499	Direct
Mar 6, 2026	ALT Altimmune, Inc.	Purchase(P)	5,000	$3.54	$17,700	Direct
Feb 26, 2026	ALT Altimmune, Inc.	Award(A) Restricted Stock Units	111,000	-	-	Direct
Feb 26, 2026	ALT Altimmune, Inc.	Award(A) Stock Options (option to buy)	259,000	-	-	Direct
Nov 11, 2025	ALT Altimmune, Inc.	Exercise(M)	18,750	-	-	Direct
Nov 11, 2025	ALT Altimmune, Inc.	Tax Payment(F)	5,672	$4.28	$24,276	Direct
Oct 1, 2025	ALT Altimmune, Inc.	Award(A) Restricted Stock Units	57,900	-	-	Direct
Oct 1, 2025	ALT Altimmune, Inc.	Award(A) Stock Options (option to buy)	166,800	-	-	Direct
Mar 13, 2025	ALT Altimmune, Inc.	Purchase(P)	10,000	$5.20	$51,996	Direct
Nov 11, 2024	ALT Altimmune, Inc.	Award(A) Stock Options (option to buy)	225,000	-	-	Direct
Nov 11, 2024	ALT Altimmune, Inc.	Award(A) Restricted Stock Units	75,000	-	-	Direct

1-14 of 14 transactions

About WEAVER GREGORY L

WEAVER GREGORY L (SEC CIK 0001251779) files insider reports with the SEC as Chief Financial Officer of Altimmune, Inc. (ALT).

Signal8 holds 10 ownership filings by WEAVER GREGORY L (1 Form 3, 9 Form 4), filed between Nov 12, 2024 and Oct 5, 2026. Those filings report 14 transactions, from Nov 11, 2024 to Oct 1, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on WEAVER GREGORY L's filings is in GAITHERSBURG, MD.

Recent filings by WEAVER GREGORY L

Oct 1, 2026: Option exercise of ALT shares (Form 4, code M).
Oct 1, 2026: Tax withholding of ALT shares (Form 4, code F).
Jul 31, 2026: Grant or award of ALT shares (Form 4, code A).
Apr 1, 2026: Open-market purchase of ALT shares (Form 4, code P).
Mar 6, 2026: Open-market purchase of ALT shares (Form 4, code P).

Other insiders filing for Altimmune, Inc. (ALT)

Arbet-Engels Christophe, Chief Medical Officer
MENZIUSO RICHARD THOMAS, Principal Accounting Officer
Richardson Linda M, Chief Commercial Officer
Durso Jerome Benedict, President and CEO
Roberts M Scot, Chief Scientific Officer
Lawver Teri L, Director

How to read Form 4 transaction codes