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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
LPL Financial
76
LPL Financial
California
$176K -$56.2K -12,898 -21%
VCM
77
Voleon Capital Management
California
$170K +$205K +47,055 New
Creative Planning
78
Creative Planning
Kansas
$169K +$45.8K +10,508 +29%
Rockefeller Capital Management
79
Rockefeller Capital Management
New York
$156K +$188K +43,113 +79,839%
MIM
80
MetLife Investment Management
New Jersey
$138K -$27.6K -6,341 -14%
KWA
81
Kingswood Wealth Advisors
California
$130K +$89.8K +20,600 +134%
Acadian Asset Management
82
Acadian Asset Management
Massachusetts
$128K +$156K +35,732 New
KA
83
Kovack Advisors
Florida
$127K +$154K +35,215 New
Squarepoint
84
Squarepoint
New York
$126K -$2.4M -549,747 -94%
MML Investors Services
85
MML Investors Services
Massachusetts
$125K – – –
Group One Trading
86
Group One Trading
Illinois
$113K -$475K -108,883 -78%
FRM
87
Fox Run Management
Connecticut
$110K +$133K +30,603 New
Canada Pension Plan Investment Board
88
Canada Pension Plan Investment Board
Ontario, Canada
$108K +$131K +30,000 New
Cetera Investment Advisers
89
Cetera Investment Advisers
Illinois
$107K +$41.3K +9,481 +47%
Citigroup
90
Citigroup
New York
$102K +$80.9K +18,550 +190%
FCM
91
Farallon Capital Management
California
$99.6K – – –
Manulife (Manufacturers Life Insurance)
92
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$99.6K +$7.01K +1,609 +6%
Royal Bank of Canada
93
Royal Bank of Canada
Ontario, Canada
$99K -$171K -39,319 -59%
CIA
94
Concurrent Investment Advisors
Florida
$95.7K +$10.9K +2,500 +10%
AC
95
AXQ Capital
New Jersey
$92.8K +$23K +5,266 +26%
PFSRSONJ
96
Police & Firemen's Retirement System of New Jersey
New Jersey
$85.1K – – –
DS
97
DRW Securities
Illinois
$81.1K +$98K +22,469 New
New York State Common Retirement Fund
98
New York State Common Retirement Fund
New York
$77.4K – – –
AQR Capital Management
99
AQR Capital Management
Connecticut
$76.3K +$92.2K +21,147 New
ProShare Advisors
100
ProShare Advisors
Maryland
$75.1K +$16.3K +3,735 +22%
2 3
4
5 6

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.