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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
NA
151
NewEdge Advisors
Louisiana
$6.82K -$5.67K -1,300 -41%
CTB
152
Country Trust Bank
Illinois
$3.61K – – –
LSA
153
Leonteq Securities AG
Switzerland
$3.61K +$4.36K +1,000 New
TCOV
154
Trust Company of Vermont
Vermont
$3.61K +$4.36K +1,000 New
MPWT
155
MassMutual Private Wealth & Trust
Connecticut
$3.31K +$2.18K +500 +120%
UBS AM
156
UBS AM
Illinois
$2.43K +$2.93K +672 New
US Bancorp
157
US Bancorp
Minnesota
$2.02K +$2.21K +508 +996%
SCM
158
Sterling Capital Management
North Carolina
$1.91K +$1.45K +333 +169%
SHIM
159
Stone House Investment Management
Pennsylvania
$1.8K – – –
S
160
SignatureFD
Georgia
$1.77K +$2.14K +490 New
EWP
161
Elevation Wealth Partners
California
$1.03K – – –
Daiwa Securities Group
162
Daiwa Securities Group
Japan
$1K – – –
Fifth Third Bancorp
163
Fifth Third Bancorp
Ohio
$903 – – –
LWMI
164
Legacy Wealth Management (Idaho)
Idaho
$903 +$1.09K +250 New
TPCW
165
TD Private Client Wealth
New York
$697 +$841 +193 New
MCM
166
MAI Capital Management
Ohio
$542 – – –
LI
167
LRI Investments
Florida
$444 +$536 +123 New
Northwestern Mutual Wealth Management
168
Northwestern Mutual Wealth Management
Wisconsin
$361 -$4 -1 -1%
Nisa Investment Advisors
169
Nisa Investment Advisors
Missouri
$343 – – –
AF
170
Allworth Financial
California
$322 +$388 +89 New
FFA
171
Farther Finance Advisors
California
$264 – – –
PA
172
Parallel Advisors
California
$144 – – –
CA
173
Clearstead Advisors
Ohio
$143 +$174 +40 New
Comerica Bank
174
Comerica Bank
Texas
$101 +$122 +28 New
BWM
175
Bernard Wealth Management
Michigan
$55 – – –
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.