Company · Ownership research

Altimmune, Inc. ALT

CIK 0001326190 · CUSIP 02155H200

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 02155H200 (ALT), not CUSIP 02155H900 (ALT), CUSIP 02155H950 (ALT), and does not merge CUSIPs.

This page lists the top 20 of 169 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$33.56M 5,466,094 shares	0.00%	—	SEC filing ↗ Nov 13, 2024	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$30.60M 4,983,858 shares	0.00%	+77.24K(+1.60%)Added	SEC filing ↗ Nov 13, 2024	▾
03	AMERIPRISE FINANCIAL INC CIK 820027 · View history	$23.80M 3,876,044 shares	0.01%	+652.05K(+20.20%)Added	SEC filing ↗ Nov 14, 2024	▾
04	STATE STREET CORP CIK 93751 · View history	$20.96M 3,413,827 shares	0.00%	-495.46K(-12.70%)Reduced	SEC filing ↗ Nov 14, 2024	▾
05	TANG CAPITAL MANAGEMENT LLC CIK 1232621 · View history	$16.89M 2,750,000 shares	1.21%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
06	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$10.24M 1,668,004 shares	0.00%	+74.19K(+4.70%)Added	SEC filing ↗ Nov 12, 2024	▾
07	MORGAN STANLEY CIK 895421 · Amended · View history	$7.95M 1,295,585 shares	0.00%	+4.57K(+0.40%)Added	SEC filing ↗ May 14, 2025	▾
08	Knoll Capital Management, LLC CIK 1325083 · View history	$6.89M 1,121,524 shares	3.19%	0(0.00%)Unchanged	SEC filing ↗ Nov 14, 2024	▾
09	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$5.73M 932,825 shares	0.00%	-77.32K(-7.70%)Reduced	SEC filing ↗ Nov 14, 2024	▾
10	SUSQUEHANNA INTERNATIONAL GROUP, LLP CIK 1446194 · View history	$5.69M 926,962 shares	0.01%	-1.28M(-58.10%)Reduced	SEC filing ↗ Nov 14, 2024	▾
11	Bellevue Group AG CIK 1674546 · View history	$5.30M 863,660 shares	0.09%	+263.66K(+43.90%)Added	SEC filing ↗ Nov 14, 2024	▾
12	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$4.65M 758,004 shares	0.01%	-4.36K(-0.60%)Reduced	SEC filing ↗ Nov 14, 2024	▾
13	CAPITAL FUND MANAGEMENT S.A. CIK 1323645 · View history	$4.46M 726,829 shares	0.05%	-159.45K(-18.00%)Reduced	SEC filing ↗ Nov 13, 2024	▾
14	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$3.97M 646,377 shares	0.00%	+76.20K(+13.40%)Added	SEC filing ↗ Nov 7, 2024	▾
15	NORTHERN TRUST CORP CIK 73124 · View history	$3.87M 629,998 shares	0.00%	+102.70K(+19.50%)Added	SEC filing ↗ Nov 13, 2024	▾
16	SCHRODER INVESTMENT MANAGEMENT GROUP CIK 1086619 · View history	$3.07M 473,865 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 13, 2024	▾
17	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$2.79M 454,302 shares	0.01%	-122.26K(-21.20%)Reduced	SEC filing ↗ Nov 14, 2024	▾
18	CITADEL ADVISORS LLC CIK 1423053 · View history	$2.63M 427,587 shares	0.00%	+426.57K(+41,779.20%)Added	SEC filing ↗ Nov 14, 2024	▾
19	JANE STREET GROUP, LLC CIK 1595888 · View history	$2.35M 382,663 shares	0.00%	+246.41K(+180.90%)Added	SEC filing ↗ Nov 15, 2024	▾
20	GSA CAPITAL PARTNERS LLP CIK 1362033 · View history	$2.08M 339,595 shares	0.16%	-148.53K(-30.40%)Reduced	SEC filing ↗ Nov 5, 2024	▾

Showing 20 / 169 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

169

Cancelled or null records excluded

Disclosed shares

39,543,920

Not deduplicated across managers

Disclosed value

$242.95M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Altimmune, Inc. · Q3 2024

Explore all 169 reporting institutions.

This page includes 20 of 169 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.