Stock Ownership/ALT

ALTIMMUNE INC (ALT): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in ALT · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
17
13F filers
Aggregate Value
$79.9M
Across holders
Last Price
$3.11
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity13 increased4 reduced1 exited
Full exits: FARALLON CAPITAL MANAGEMENT LLC
Institutional Holders of ALT
↗
17 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund6.84M$20.8M26.0%0.0%Added$-13.8MQ2 2026
VIKING GLOBAL INVESTORS LP
CIK 0001103804
Hedge Fund6.70M$20.4M25.5%0.1%Added—Q2 2026
Woodline Partners LP
CIK 0001784547
Hedge Fund3.40M$10.3M12.9%0.0%Added—Q2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund3.31M$10.1M12.6%0.0%Added+$155KQ2 2026
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund2.38M$7.2M9.1%0.0%Reduced$-297KQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund1.22M$3.7M4.6%0.0%Added+$3.7MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund984K$3.0M3.7%0.0%Added+$1.8MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund487K$1.5M1.9%0.0%Reduced$-542KQ2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund202K$615K0.8%0.0%Added+$560KQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund202K$613K0.8%0.0%Reduced+$35KQ2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$20.8M· 26.0% of total· 0.0% port· 6.84M sh· $-13.8M QoQ· Q2 2026
VIKING GLOBAL INVESTORS LPAdded
Hedge Fund
$20.4M· 25.5% of total· 0.1% port· 6.70M sh· — QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$10.3M· 12.9% of total· 0.0% port· 3.40M sh· — QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$10.1M· 12.6% of total· 0.0% port· 3.31M sh· +$155K QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$7.2M· 9.1% of total· 0.0% port· 2.38M sh· $-297K QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$3.7M· 4.6% of total· 0.0% port· 1.22M sh· +$3.7M QoQ· Q2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$3.0M· 3.7% of total· 0.0% port· 984K sh· +$1.8M QoQ· Q2 2026
Point72 Asset Management, L.P.Reduced
Hedge Fund
$1.5M· 1.9% of total· 0.0% port· 487K sh· $-542K QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$615K· 0.8% of total· 0.0% port· 202K sh· +$560K QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$613K· 0.8% of total· 0.0% port· 202K sh· +$35K QoQ· Q2 2026
Man Group plcAdded
Hedge Fund
$529K· 0.7% of total· 0.0% port· 174K sh· +$134K QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$398K· 0.5% of total· 0.0% port· 131K sh· +$159K QoQ· Q2 2026
Grantham, Mayo, Van Otterloo & Co. LLCReduced
Institutional Manager
$255K· 0.3% of total· 0.0% port· 84K sh· $-129K QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCAdded
Hedge Fund
$218K· 0.3% of total· 0.0% port· 72K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$151K· 0.2% of total· 0.0% port· 50K sh· $-264K QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$107K· 0.1% of total· 0.0% port· 35K sh· — QoQ· Q2 2026
Walleye Capital LLCAdded
Hedge Fund
$26K· 0.0% of total· 0.0% port· 8K sh· +$23K QoQ· Q2 2026
1–10 of 17
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