Matthew Scott Harris Altimmune, Inc. (ALT) insider trading activity

Matthew Scott Harris is Chief Medical Officer of Altimmune, Inc.. Currently has a direct ownership of 14,069 shares of ALT, which is worth approximately $73,158. The most recent transaction as insider was on Mar 07, 2025, when has been sold 67,787 shares (Common Stock, par value $0.0001) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 14.1K

74.48% 3M change

73.77% 12M change

Total Value Held $73,158

Matthew Scott Harris Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Mar 07 2025	SELL Bona fide gift	-	67,787 Reduced 82.81%	14,069 Common Stock, par valu...
Feb 02 2025	SELL Payment of exercise price or tax liability	$17,981 $6.64 p/Share	2,708 Reduced 3.2%	81,856 Common Stock, par valu...
Feb 02 2025	BUY Exercise of conversion of derivative security	-	7,775 Added 8.42%	84,564 Common Stock, par valu...
Feb 01 2025	SELL Payment of exercise price or tax liability	$14,003 $6.64 p/Share	2,109 Reduced 2.67%	76,789 Common Stock, par valu...
Feb 01 2025	BUY Exercise of conversion of derivative security	-	6,166 Added 7.25%	78,898 Common Stock, par valu...
Jan 31 2025	BUY Grant, award, or other acquisition	$9,867 $5.18 p/Share	1,905 Added 2.55%	72,732 Common Stock, par valu...
Jan 30 2025	SELL Payment of exercise price or tax liability	$22,211 $7.0 p/Share	3,173 Reduced 4.29%	70,827 Common Stock, par valu...
Jan 30 2025	BUY Exercise of conversion of derivative security	-	9,275 Added 11.14%	74,000 Common Stock, par valu...
Jan 25 2025	SELL Payment of exercise price or tax liability	$34,858 $6.98 p/Share	4,994 Reduced 7.16%	64,725 Common Stock, par valu...
Jan 25 2025	BUY Exercise of conversion of derivative security	-	14,600 Added 17.32%	69,719 Common Stock, par valu...
Jul 31 2024	BUY Grant, award, or other acquisition	$8,039 $5.41 p/Share	1,486 Added 2.63%	55,119 Common Stock, par valu...
Feb 02 2024	SELL Payment of exercise price or tax liability	$21,734 $9.32 p/Share	2,332 Reduced 4.17%	53,633 Common Stock, par valu...
Feb 02 2024	BUY Exercise of conversion of derivative security	-	7,775 Added 12.2%	55,965 Common Stock, par valu...
Feb 01 2024	SELL Payment of exercise price or tax liability	$17,793 $9.88 p/Share	1,801 Reduced 3.6%	48,190 Common Stock, par valu...
Feb 01 2024	BUY Exercise of conversion of derivative security	-	6,166 Added 10.98%	49,991 Common Stock, par valu...
Jan 31 2024	BUY Grant, award, or other acquisition	$8,761 $2.69 p/Share	3,257 Added 6.92%	43,825 Common Stock, par valu...
Jan 30 2024	SELL Payment of exercise price or tax liability	$26,548 $9.8 p/Share	2,709 Reduced 6.26%	40,568 Common Stock, par valu...
Jan 30 2024	BUY Exercise of conversion of derivative security	-	9,275 Added 17.65%	43,277 Common Stock, par valu...
Jul 31 2023	BUY Grant, award, or other acquisition	$1,941 $2.81 p/Share	691 Added 1.99%	34,002 Common Stock, par valu...
Mar 23 2023	BUY Open market or private purchase	$42,200 $4.22 p/Share	10,000 Added 23.09%	33,311 Common Stock, par valu...
Feb 02 2023	SELL Payment of exercise price or tax liability	$35,554 $15.04 p/Share	2,364 Reduced 9.21%	23,311 Common Stock, par valu...
Feb 02 2023	BUY Exercise of conversion of derivative security	-	7,775 Added 23.24%	25,675 Common Stock, par valu...
Feb 01 2023	SELL Payment of exercise price or tax liability	$30,081 $13.78 p/Share	2,183 Reduced 10.87%	17,900 Common Stock, par valu...
Feb 01 2023	BUY Exercise of conversion of derivative security	-	6,166 Added 23.49%	20,083 Common Stock, par valu...
Jan 31 2023	BUY Grant, award, or other acquisition	$13,232 $10.21 p/Share	1,296 Added 8.52%	13,917 Common Stock, par valu...

MSH

Matthew Scott Harris

Chief Medical Officer

Gaithersburg, MD

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