Altimmune, Inc. (ALT) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

89,418,028Shares Outstanding

56,357,300Shares held by institutions

$146,810,767Value of institutional holdings

63.03%Institutional ownership %

36.60%Shares Changed QoQ

180No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Altimmune, Inc. (NASDAQ:ALT) has 180 institutional investors that have filed 13F reports for the period ending December 2025.

These investors held 61.3% of outstanding shares in December 2025, up from 47.0% in September 2025.
Their total shares held in ALT increased 34.52% from the prior quarter, while the number of investors in Altimmune increased 1.69% year over year.
Of these 180 funds, 119 grew their exposure to Altimmune, 31 cut back, and 30 maintained positions.
Altogether, these fund groups held 54.83Mn shares in ALT by December 2025, up by 14.07Mn shares quarter on quarter, and up 12.57Mn shares year over year.
As of December 31, 2025, BROWN WEALTH MANAGEMENT, LLC held the largest stake in Altimmune with 236.14K shares, accounting for 0.26% of total shares outstanding.
Leading buyers of Altimmune shares for the quarter ending December 2025 were Janney Montgomery Scott LLC (70.0K), SG Americas Securities, LLC (45.05K), E Fund Management Co., Ltd. (29.07K), WEALTH EFFECTS LLC (20.2K), North Star Investment Management Corp. (9.0K).
The largest sellers of Altimmune for the quarter ending December 2025 were BROWN WEALTH MANAGEMENT, LLC (22.54K), Composition Wealth, LLC (20).
Per Business Quant, the top 10 investors in ALT for the quarter ending December 2025 include BROWN WEALTH MANAGEMENT, LLC (236.14K), Janney Montgomery Scott LLC (172.61K), WEALTH EFFECTS LLC (131.95K), SG Americas Securities, LLC (55.62K), E Fund Management Co., Ltd. (29.07K), Concurrent Investment Advisors, LLC (26.51K), Keudell/Morrison Wealth Management (18.5K), North Star Investment Management Corp. (17.0K), Composition Wealth, LLC (17.0K), Activest Wealth Management (5.0K).

180 Institutional Holders

56,357,300 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	9,704,298	3,331,039	52.27%	$35,032,515.00
VANGUARD GROUP INC	31 Dec, 2025	9,491,159	3,117,521	48.91%	$34,263,084.00
State Street Corp	31 Dec, 2025	5,119,703	1,518,448	42.16%	$18,482,128.00
Goldman Sachs Group Inc	31 Dec, 2025	2,698,586	2,136,329	379.96%	$9,741,896.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	2,292,410	275,025	13.63%	$8,277,782.00
TANG CAPITAL MANAGEMENT LLC	31 Dec, 2025	2,131,307	0	0.00%	$7,694,018.00
JANE STREET GROUP, LLC	31 Dec, 2025	1,783,950	1,503,751	536.67%	$6,440,060.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	1,369,017	-5,165	-0.38%	$4,942,151.00
Morgan Stanley	31 Dec, 2025	1,359,885	-131,164	-8.80%	$4,909,186.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	1,343,583	983,188	272.81%	$4,850,335.00
CITADEL ADVISORS LLC	31 Dec, 2025	1,337,927	55,913	4.36%	$4,829,917.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	1,265,683	-731,165	-36.62%	$4,569,116.00
Nuveen, LLC	31 Dec, 2025	1,244,211	1,041,856	514.87%	$4,491,602.00
Knoll Capital Management, LLC	31 Dec, 2025	1,121,524	0	0.00%	$4,048,701.00
MARSHALL WACE, LLP	31 Dec, 2025	922,777	922,777	0.00%	$3,331,226.00
TWO SIGMA ADVISERS, LP	31 Dec, 2025	793,900	-634,500	-44.42%	$2,865,979.00
Northern Trust Corp	31 Dec, 2025	715,991	58,975	8.98%	$2,584,727.00
UBS Group AG	31 Dec, 2025	642,048	-789	-0.12%	$2,317,793.00
FMR LLC	31 Dec, 2025	564,093	118,956	26.72%	$2,036,376.00
SCHRODER INVESTMENT MANAGEMENT GROUP	31 Dec, 2025	469,013	469,013	0.00%	$1,693,137.00

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