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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
FHC
176
First Horizon Corporation
Tennessee
$11 – – –
HNB
177
Huntington National Bank
Ohio
$7 – – –
CPG
178
Cornerstone Planning Group
New Jersey
$5 -$11.2K -2,561 -100%
CRI
179
Commonwealth Retirement Investments
Virginia
$4 +$4 +1 New
RIL
180
Rothschild Investment LLC
Illinois
$4 +$4 +1 New
Point72 Asset Management
181
Point72 Asset Management
Connecticut
– -$1.8M -476,926 Closed
Simplex Trading
182
Simplex Trading
Illinois
– -$932K -213,709 Closed
GCP
183
GSA Capital Partners
United Kingdom
– -$440K -116,770 Closed
Macquarie Group
184
Macquarie Group
Australia
– -$377K -100,000 Closed
DAM
185
DLD Asset Management
New York
– -$189K -50,000 Closed
SB
186
SIG Brokerage
New York
– -$130K -34,502 Closed
KIA
187
Kraematon Investment Advisors
Massachusetts
– -$65.7K -17,435 Closed
FCM
188
Fortis Capital Management
Washington
– -$62.6K -16,606 Closed
Walleye Trading
189
Walleye Trading
New York
– -$64.3K -14,759 Closed
Cambridge Investment Research Advisors
190
Cambridge Investment Research Advisors
Iowa
– -$47K -12,532 Closed
QL
191
Quarry LP
New York
– -$18.9K -5,019 Closed
FIA
192
FNY Investment Advisers
New York
– -$18K -5,000 Closed
HighTower Advisors
193
HighTower Advisors
Illinois
– -$18.5K -4,909 Closed
GLF
194
Groupe la Francaise
France
– -$3.87K -1,200 Closed
Zurich Cantonal Bank
195
Zurich Cantonal Bank
Switzerland
– -$4.9K -1,125 Closed
GRP
196
Global Retirement Partners
California
– -$3.77K -1,000 Closed
NS
197
NBC Securities
Alabama
– -$3.77K -1,000 Closed
HCM
198
Hollencrest Capital Management
California
– -$2.9K -770 Closed
Bessemer Group
199
Bessemer Group
New Jersey
– -$2.88K -660 Closed
AAS
200
Ameritas Advisory Services
Nebraska
– -$754 -200 Closed
5 6 7
8
9

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.