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Altimmune
ALT

176 hedge funds and large institutions have $191M invested in Altimmune in 2025 Q1 according to their latest regulatory filings, with 26 funds opening new positions, 54 increasing their positions, 52 reducing their positions, and 29 closing their positions.

New
Increased
Maintained
Reduced
Closed

31% more call options, than puts

Call options by funds: $13.5M | Put options by funds: $10.3M

4% more repeat investments, than reductions

Existing positions increased: 54 | Existing positions reduced: 52

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

3% less funds holding

Funds holding: 182 → 176 (-6)

7.34% less ownership

Funds ownership: 56.91% → 49.57% (-7.3%)

10% less first-time investments, than exits

New positions opened: 26 | Existing positions closed: 29

35% less capital invested

Capital invested by funds: $292M → $191M (-$101M)

Holders
176
Holders Change
-6
Holders Change %
-3.3%
% of All Funds
2.36%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
26
Increased
54
Reduced
52
Closed
29
Calls
$13.5M
Puts
$10.3M
Net Calls
+$3.17M
Net Calls Change
-$3.73M

Top Buyers

Rank Fund Capital Flow
1
Marshall Wace
Marshall Wace
United Kingdom
+$6.99M
2
Millennium Management
Millennium Management
New York
+$4.85M
3
Susquehanna International Group
Susquehanna International Group
Pennsylvania
+$3.64M
4
Two Sigma Investments
Two Sigma Investments
New York
+$3.44M
5
Schroder Investment Management Group
Schroder Investment Management Group
United Kingdom
+$3.38M

Top Sellers

Rank Fund Capital Flow
1
Ameriprise
Ameriprise
Minnesota
-$24.1M
2
Citadel Advisors
Citadel Advisors
Florida
-$4.28M
3
Ensign Peak Advisors
Ensign Peak Advisors
Utah
-$3.28M
4
D.E. Shaw & Co
D.E. Shaw & Co
New York
-$2.59M
5
Morgan Stanley
Morgan Stanley
New York
-$1.68M
Name Holding Trade Value Shares
Change 		Change in
Stake
Wellington Management Group
26
Wellington Management Group
Massachusetts
$1.12M +$125K +19,721 +10%
Charles Schwab
27
Charles Schwab
California
$1.06M – – –
HWAM
28
Hennion & Walsh Asset Management
New Jersey
$988K -$50.1K -7,906 -4%
Bank of New York Mellon
29
Bank of New York Mellon
New York
$945K +$13.7K +2,162 +1%
Federated Hermes
30
Federated Hermes
Pennsylvania
$939K +$1.19M +187,727 New
Barclays
31
Barclays
United Kingdom
$937K +$190K +29,934 +19%
Citigroup
32
Citigroup
New York
$818K +$246K +38,828 +31%
ETC
33
Exchange Traded Concepts
Oklahoma
$768K -$37.8K -5,967 -4%
Jane Street
34
Jane Street
New York
$763K -$798K -126,008 -45%
SPIA
35
Steward Partners Investment Advisory
New York
$746K +$767K +121,159 +432%
Rafferty Asset Management
36
Rafferty Asset Management
New York
$718K -$89.2K -14,078 -9%
Swiss National Bank
37
Swiss National Bank
Switzerland
$698K – – –
Squarepoint
38
Squarepoint
New York
$669K +$755K +119,179 +810%
SFWA
39
Summit Financial Wealth Advisors
Louisiana
$590K +$117K +18,500 +19%
JP Morgan Chase
40
JP Morgan Chase
New York
$553K +$48K +7,571 +7%
UBS AM
41
UBS AM
Illinois
$534K +$91.7K +14,480 +16%
RhumbLine Advisers
42
RhumbLine Advisers
Massachusetts
$533K +$10.4K +1,643 +2%
SAM
43
Silvercrest Asset Management
New York
$518K – – –
BWM
44
Brown Wealth Management
Illinois
$500K +$317K +50,024 +100%
Macquarie Group
45
Macquarie Group
Australia
$500K – – –
Wells Fargo
46
Wells Fargo
California
$458K -$785K -123,857 -57%
Commonwealth Equity Services
47
Commonwealth Equity Services
Massachusetts
$448K +$22.7K +3,582 +4%
SC
48
Sculptor Capital
New York
$440K +$557K +88,000 New
IMC Chicago
49
IMC Chicago
Illinois
$417K -$1.39M -220,221 -73%
Invesco
50
Invesco
Georgia
$406K -$1.05M -165,958 -67%
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ALT Hedge Fund Activity: Q1 2025 in Review

176 of the 7,459 institutional investors tracked by Wall St. Rank reported a position in Altimmune (ALT) for Q1 2025, worth a combined $191M — down 35% from $292M a quarter earlier.

Sellers outnumbered buyers: 29 funds closed out of ALT and 26 opened new positions — a net loss of 3 holders — while 52 trimmed existing stakes and 54 added.

The largest buyer was Marshall Wace, adding an estimated $6.99M. The largest seller was Ameriprise, cutting an estimated $24.1M.

  • 176 institutional investors held Altimmune (ALT) as of Q1 2025, down from 182 in Q4 2024.
  • Funds reported $191M of Altimmune stock for Q1 2025, down 35% quarter-over-quarter.
  • 26 funds opened new Altimmune positions in Q1 2025 and 29 closed out, a net change of -3 holders.
  • The largest Altimmune buyer in Q1 2025 was Marshall Wace, an estimated $6.99M added.
  • The largest Altimmune seller in Q1 2025 was Ameriprise, an estimated $24.1M sold.

Based on aggregated 13F filings for Q1 2025.