We are live on ! Find out more
ALT icon

Altimmune
ALT

181 hedge funds and large institutions have $198M invested in Altimmune in 2025 Q4 according to their latest regulatory filings, with 48 funds opening new positions, 74 increasing their positions, 28 reducing their positions, and 22 closing their positions.

New
Increased
Maintained
Reduced
Closed

164% more repeat investments, than reductions

Existing positions increased: 74 | Existing positions reduced: 28

118% more first-time investments, than exits

New positions opened: 48 | Existing positions closed: 22

27% more capital invested

Capital invested by funds: $157M → $198M (+$41.5M)

15% more funds holding

Funds holding: 158 → 181 (+23)

5.57% more ownership

Funds ownership: 47% → 52.56% (+5.6%)

17% less call options, than puts

Call options by funds: $13.1M | Put options by funds: $15.7M

Holders
181
Holders Change
+23
Holders Change %
+14.56%
% of All Funds
2.2%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
48
Increased
74
Reduced
28
Closed
22
Calls
$13.1M
Puts
$15.7M
Net Calls
-$2.62M
Net Calls Change
-$7.17M

Top Buyers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
+$14.5M
2
Vanguard Group
Vanguard Group
Pennsylvania
+$13.6M
3
State Street
State Street
Massachusetts
+$6.62M
4
Jane Street
Jane Street
New York
+$6.56M
5
N
Nuveen
North Carolina
+$4.54M

Top Sellers

Rank Fund Capital Flow
1
Two Sigma Investments
Two Sigma Investments
New York
-$3.19M
2
Two Sigma Advisers
Two Sigma Advisers
New York
-$2.77M
3
Squarepoint
Squarepoint
New York
-$2.4M
4
Point72 Asset Management
Point72 Asset Management
Connecticut
-$1.8M
5
Simplex Trading
Simplex Trading
Illinois
-$932K
Name Holding Trade Value Shares
Change 		Change in
Stake
Dimensional Fund Advisors
26
Dimensional Fund Advisors
Texas
$1.02M -$61.4K -14,086 -5%
Charles Schwab
27
Charles Schwab
California
$1.02M +$345K +79,220 +39%
SC
28
Sculptor Capital
New York
$999K – – –
BWM
29
Brown Wealth Management
Illinois
$934K +$109K +25,000 +11%
Wellington Management Group
30
Wellington Management Group
Massachusetts
$929K -$32.8K -7,531 -3%
SPIA
31
Steward Partners Investment Advisory
New York
$886K +$114K +26,084 +12%
JF
32
Jump Financial
Illinois
$874K +$550K +126,217 +109%
Invesco
33
Invesco
Georgia
$776K +$231K +52,881 +33%
HWAM
34
Hennion & Walsh Asset Management
New Jersey
$775K +$127K +29,057 +16%
Millennium Management
35
Millennium Management
New York
$749K -$698K -160,199 -44%
Rafferty Asset Management
36
Rafferty Asset Management
New York
$707K +$173K +39,572 +25%
Commonwealth Equity Services
37
Commonwealth Equity Services
Massachusetts
$655K +$32.2K +7,386 +4%
BNP Paribas Financial Markets
38
BNP Paribas Financial Markets
France
$640K +$448K +102,772 +138%
IMC Chicago
39
IMC Chicago
Illinois
$625K +$252K +57,770 +50%
Grantham, Mayo, Van Otterloo & Co (GMO)
40
Grantham, Mayo, Van Otterloo & Co (GMO)
Massachusetts
$623K +$752K +172,559 New
JFG
41
Jefferies Financial Group
New York
$570K +$470K +107,800 +216%
Los Angeles Capital Management
42
Los Angeles Capital Management
California
$523K +$560K +128,529 New
Wells Fargo
43
Wells Fargo
California
$510K +$211K +48,375 +52%
SPS
44
Susquehanna Portfolio Strategies
Pennsylvania
$488K -$218K -50,057 -27%
HSBC Holdings
45
HSBC Holdings
United Kingdom
$474K +$258K +59,095 +81%
Jacobs Levy Equity Management
46
Jacobs Levy Equity Management
New Jersey
$451K +$544K +124,821 New
Stifel Financial
47
Stifel Financial
Missouri
$446K +$275K +63,005 +104%
RhumbLine Advisers
48
RhumbLine Advisers
Massachusetts
$439K -$40.2K -9,230 -7%
Baird Financial Group
49
Baird Financial Group
Wisconsin
$431K – – –
BHCM
50
Brevan Howard Capital Management
Jersey
$412K -$474K -108,814 -49%
1
2
3 4 5

ALT Hedge Fund Activity: Q4 2025 in Review

181 of the 8,227 institutional investors tracked by Wall St. Rank reported a position in Altimmune (ALT) for Q4 2025, worth a combined $198M — up 27% from $157M a quarter earlier.

Buyers outnumbered sellers: 48 funds opened new ALT positions and 22 closed out — a net gain of 26 holders — while 74 added to existing stakes and 28 trimmed.

The largest buyer was BlackRock, adding an estimated $14.5M. The largest seller was Two Sigma Investments, cutting an estimated $3.19M.

  • 181 institutional investors held Altimmune (ALT) as of Q4 2025, up from 158 in Q3 2025.
  • Funds reported $198M of Altimmune stock for Q4 2025, up 27% quarter-over-quarter.
  • 48 funds opened new Altimmune positions in Q4 2025 and 22 closed out, a net change of +26 holders.
  • The largest Altimmune buyer in Q4 2025 was BlackRock, an estimated $14.5M added.
  • The largest Altimmune seller in Q4 2025 was Two Sigma Investments, an estimated $3.19M sold.

Based on aggregated 13F filings for Q4 2025.