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Altimmune
ALT

173 hedge funds and large institutions have $214M invested in Altimmune in 2026 Q1 according to their latest regulatory filings, with 30 funds opening new positions, 82 increasing their positions, 34 reducing their positions, and 33 closing their positions.

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New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more capital invested

Capital invested by funds: $ → $

more ownership

Funds ownership: →

9% less first-time investments, than exits

New positions opened: 30 | Existing positions closed: 33

4% less funds holding

Funds holding: 181 → 173 (-8)

Holders
173
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
–
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$10.4M
Puts
$3.21M
Net Calls
Net Calls Change

Top Buyers

Rank Fund Capital Flow
1
+$13.1M
2
+$13.1M
3
+$13M
4
Alyeska Investment Group
Alyeska Investment Group
Illinois
+$11.2M
5
State Street
State Street
Massachusetts
+$8.6M

Top Sellers

Rank Fund Capital Flow
1
-$7.57M
2
-$6.22M
3
-$4.08M
4
Citadel Advisors
Citadel Advisors
Florida
-$3.77M
5
D.E. Shaw & Co
D.E. Shaw & Co
New York
-$2.62M
Name Holding Trade Value Shares
Change 		Change in
Stake
BlackRock
1
BlackRock
New York
$39.4M
State Street
2
State Street
Massachusetts
$22M
VCM
3
Vanguard Capital Management
Pennsylvania
$17.4M
VPM
4
Vanguard Portfolio Management
Pennsylvania
$16.6M
Marshall Wace
5
Marshall Wace
United Kingdom
$12.4M
Millennium Management
6
Millennium Management
New York
$10M
Geode Capital Management
7
Geode Capital Management
Massachusetts
$9.57M
Alyeska Investment Group
8
Alyeska Investment Group
Illinois
$8.15M
Two Sigma Investments
9
Two Sigma Investments
New York
$7.64M
N
10
Nuveen
North Carolina
$7.19M
Goldman Sachs
11
Goldman Sachs
New York
$4.16M
Susquehanna International Group
12
Susquehanna International Group
Pennsylvania
$4.08M
Dimensional Fund Advisors
13
Dimensional Fund Advisors
Texas
$3.22M
Northern Trust
14
Northern Trust
Illinois
$3.07M
UBS Group
15
UBS Group
Switzerland
$2.79M
VFT
16
Vanguard Fiduciary Trust
Pennsylvania
$2.68M
Morgan Stanley
17
Morgan Stanley
New York
$2.39M
D.E. Shaw & Co
18
D.E. Shaw & Co
New York
$2.24M
Fidelity Investments
19
Fidelity Investments
Massachusetts
$2.08M
TCM
20
Tang Capital Management
California
$2.05M
Point72 Asset Management
21
Point72 Asset Management
Connecticut
$2.05M
Schroder Investment Management Group
22
Schroder Investment Management Group
United Kingdom
$1.92M
Bank of America
23
Bank of America
North Carolina
$1.76M
Citadel Advisors
24
Citadel Advisors
Florida
$1.38M
BNP Paribas Financial Markets
25
BNP Paribas Financial Markets
France
$1.34M
1
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ALT Hedge Fund Activity: Q1 2026 in Review

173 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Altimmune (ALT) for Q1 2026, worth a combined $214M — up 7.8% from $198M a quarter earlier.

Sellers outnumbered buyers: 33 funds closed out of ALT and 30 opened new positions — a net loss of 3 holders — while 34 trimmed existing stakes and 82 added.

The largest buyer was Marshall Wace, adding an estimated $13.1M. The largest seller was Jane Street, exiting entirely with an estimated $7.57M sold.

  • 173 institutional investors held Altimmune (ALT) as of Q1 2026, down from 181 in Q4 2025.
  • Funds reported $214M of Altimmune stock for Q1 2026, up 7.8% quarter-over-quarter.
  • 30 funds opened new Altimmune positions in Q1 2026 and 33 closed out, a net change of -3 holders.
  • The largest Altimmune buyer in Q1 2026 was Marshall Wace, an estimated $13.1M added.
  • The largest Altimmune seller in Q1 2026 was Jane Street, an estimated $7.57M sold.

Based on aggregated 13F filings for Q1 2026.