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Altimmune
ALT

180 hedge funds and large institutions have $146M invested in Altimmune in 2025 Q2 according to their latest regulatory filings, with 39 funds opening new positions, 72 increasing their positions, 39 reducing their positions, and 34 closing their positions.

New
Increased
Maintained
Reduced
Closed

85% more repeat investments, than reductions

Existing positions increased: 72 | Existing positions reduced: 39

16% more call options, than puts

Call options by funds: $26.2M | Put options by funds: $22.6M

15% more first-time investments, than exits

New positions opened: 39 | Existing positions closed: 34

2% more funds holding

Funds holding: 176 → 180 (+4)

3.2% less ownership

Funds ownership: 49.57% → 46.37% (-3.2%)

24% less capital invested

Capital invested by funds: $191M → $146M (-$45.6M)

100% less funds holding in top 10

Funds holding in top 10: 1 → 0 (-1)

Holders
180
Holders Change
+4
Holders Change %
+2.27%
% of All Funds
2.37%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
39
Increased
72
Reduced
39
Closed
34
Calls
$26.2M
Puts
$22.6M
Net Calls
+$3.63M
Net Calls Change
+$458K

Top Buyers

Rank Fund Capital Flow
1
CM
Caption Management
Oklahoma
+$5.1M
2
Vanguard Group
Vanguard Group
Pennsylvania
+$4.11M
3
Federated Hermes
Federated Hermes
Pennsylvania
+$3.94M
4
Susquehanna International Group
Susquehanna International Group
Pennsylvania
+$2.94M
5
Citadel Advisors
Citadel Advisors
Florida
+$2.83M

Top Sellers

Rank Fund Capital Flow
1
Ameriprise
Ameriprise
Minnesota
-$7.2M
2
Marshall Wace
Marshall Wace
United Kingdom
-$6.2M
3
Millennium Management
Millennium Management
New York
-$5.59M
4
BG
Bellevue Group
Switzerland
-$5.28M
5
Schroder Investment Management Group
Schroder Investment Management Group
United Kingdom
-$5.12M
Name Holding Trade Value Shares
Change 		Change in
Stake
CIAM
26
Caitong International Asset Management
Hong Kong
$927K +$1.29M +238,693 +25,474%
Charles Schwab
27
Charles Schwab
California
$904K +$117K +21,627 +10%
BWM
28
Brown Wealth Management
Illinois
$894K +$709K +131,059 +131%
SPIA
29
Steward Partners Investment Advisory
New York
$826K +$347K +64,175 +43%
GL
30
Gerber LLC
Ohio
$800K -$406K -75,000 -27%
N
31
Nuveen
North Carolina
$783K -$333K -61,543 -23%
HWAM
32
Hennion & Walsh Asset Management
New Jersey
$731K -$47.2K -8,729 -4%
IMC Chicago
33
IMC Chicago
Illinois
$723K +$560K +103,507 +124%
ETC
34
Exchange Traded Concepts
Oklahoma
$680K +$120K +22,101 +14%
MAP
35
Moody Aldrich Partners
Massachusetts
$610K +$853K +157,614 New
SC
36
Sculptor Capital
New York
$584K +$341K +63,000 +72%
IIM
37
INTECH Investment Management
Florida
$561K +$398K +73,482 +103%
WP
38
Woodline Partners
California
$553K +$773K +142,863 New
BHCM
39
Brevan Howard Capital Management
Jersey
$516K +$484K +89,405 +204%
Two Sigma Advisers
40
Two Sigma Advisers
New York
$500K -$731K -135,100 -51%
SFWA
41
Summit Financial Wealth Advisors
Louisiana
$476K +$27.1K +5,000 +4%
GCP
42
GSA Capital Partners
United Kingdom
$470K +$490K +90,586 +294%
RhumbLine Advisers
43
RhumbLine Advisers
Massachusetts
$441K +$40.4K +7,462 +7%
Ameriprise
44
Ameriprise
Minnesota
$441K -$7.2M -1,330,057 -92%
Invesco
45
Invesco
Georgia
$414K +$139K +25,735 +32%
APM
46
Avidity Partners Management
Texas
$406K +$568K +105,000 New
JP Morgan Chase
47
JP Morgan Chase
New York
$405K -$31.5K -5,814 -5%
SAM
48
Silvercrest Asset Management
New York
$401K – – –
Rafferty Asset Management
49
Rafferty Asset Management
New York
$395K -$225K -41,661 -29%
Macquarie Group
50
Macquarie Group
Australia
$387K – – –
1
2
3 4 5

ALT Hedge Fund Activity: Q2 2025 in Review

180 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in Altimmune (ALT) for Q2 2025, worth a combined $146M — down 24% from $191M a quarter earlier.

Buyers outnumbered sellers: 39 funds opened new ALT positions and 34 closed out — a net gain of 5 holders — while 72 added to existing stakes and 39 trimmed.

The largest buyer was Caption Management, adding an estimated $5.1M. The largest seller was Ameriprise, cutting an estimated $7.2M.

  • 180 institutional investors held Altimmune (ALT) as of Q2 2025, up from 176 in Q1 2025.
  • Funds reported $146M of Altimmune stock for Q2 2025, down 24% quarter-over-quarter.
  • 39 funds opened new Altimmune positions in Q2 2025 and 34 closed out, a net change of +5 holders.
  • The largest Altimmune buyer in Q2 2025 was Caption Management, an estimated $5.1M added.
  • The largest Altimmune seller in Q2 2025 was Ameriprise, an estimated $7.2M sold.

Based on aggregated 13F filings for Q2 2025.