Security key
02155H200
Altimmune, Inc. - Common stock, par value $0.0001 per share (ALT)
CUSIP: 02155H200
Q4 2025 13F Holders as of 31 Dec 2025
- Type / Class
- Equity / Common stock, par value $0.0001 per share
- Shares outstanding
- 129,919,091
- Total 13F shares
- 54,848,617
- Share change
- +13,154,292
- Total reported value
- $198,060,728
- Put/Call ratio
- 135%
- Price per share
- $3.61
- Number of holders
- 182
- Value change
- +$47,375,320
- Number of buys
- 118
- Number of sells
- 48
Report period
Q4 2025
Institutions
182
Top holders
10
ALT full security history
Newer quarter: Q1 2026
Previous quarter: Q3 2025
Altimmune, Inc. SEC filings
Altimmune, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 02155H200
Recent filing periods:
Top shareholders of ALT - Altimmune, Inc. - Common stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13F
|
Company |
4.9%
|
6,373,638
|
$24,028,615 | — | 30 Sep 2025 | |
| BlackRock, Inc. |
13F
13D/G
|
Company |
7.6%
from 13D/G
|
6,373,259
|
$24,027,185 | — | 30 Sep 2025 | |
| STATE STREET CORP |
13F
|
Company |
2.8%
|
3,601,255
|
$13,576,731 | — | 30 Sep 2025 | |
| TANG CAPITAL MANAGEMENT LLC |
13F
|
Company |
1.6%
|
2,131,307
|
$8,035,027 | — | 30 Sep 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.6%
|
2,017,385
|
$7,607,047 | — | 30 Sep 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
1.5%
|
1,996,848
|
$7,528,117 | — | 30 Sep 2025 | |
| AMERIPRISE FINANCIAL INC |
13D/G
13F
|
Company |
1.9%
|
1,443,932
|
$7,306,296 | -$19,283,488 | 31 Mar 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.1%
|
1,491,049
|
$5,621,255 | — | 30 Sep 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
1.1%
|
1,428,400
|
$5,385,068 | — | 30 Sep 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
1.1%
|
1,374,182
|
$5,180,666 | — | 30 Sep 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.99%
|
1,282,014
|
$4,833,193 | — | 30 Sep 2025 | |
| Knoll Capital Management, LLC |
13F
|
Company |
0.86%
|
1,121,524
|
$4,228,145 | — | 30 Sep 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.51%
|
657,016
|
$2,476,950 | — | 30 Sep 2025 | |
| UBS Group AG |
13F
|
Company |
0.49%
|
642,837
|
$2,423,496 | — | 30 Sep 2025 | |
| Squarepoint Ops LLC |
13F
|
Company |
0.45%
|
584,696
|
$2,204,304 | — | 30 Sep 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.43%
|
562,257
|
$2,119,709 | — | 30 Sep 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.37%
|
476,926
|
$1,798,010 | — | 30 Sep 2025 | |
| FMR LLC |
13F
|
Company |
0.34%
|
445,137
|
$1,678,167 | — | 30 Sep 2025 | |
| Beirne Wealth Consulting Services, LLC |
13F
|
Company |
0.32%
|
410,458
|
$1,547,427 | — | 30 Sep 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.28%
|
367,582
|
$1,385,784 | — | 30 Sep 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
0.28%
|
360,395
|
$1,358,689 | — | 30 Sep 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.26%
|
341,985
|
$1,289,285 | — | 30 Sep 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.26%
|
340,283
|
$1,282,867 | — | 30 Sep 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.25%
|
320,440
|
$1,208,059 | — | 30 Sep 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.23%
|
297,789
|
$1,122,734 | — | 30 Sep 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.22%
|
280,199
|
$1,056,350 | — | 30 Sep 2025 | |
| Sculptor Capital LP |
13F
|
Company |
0.21%
|
276,700
|
$1,043,159 | — | 30 Sep 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
0.2%
|
264,802
|
$998,304 | — | 30 Sep 2025 | |
| BROWN WEALTH MANAGEMENT, LLC |
13F
|
Company |
0.18%
|
233,673
|
$880,947 | — | 30 Sep 2025 | |
| Brevan Howard Capital Management LP |
13F
|
Company |
0.17%
|
222,942
|
$840,492 | — | 30 Sep 2025 | |
| Steward Partners Investment Advisory, LLC |
13F
|
Company |
0.17%
|
219,309
|
$826,795 | — | 30 Sep 2025 | |
| SIMPLEX TRADING, LLC |
13F
|
Company |
0.16%
|
213,709
|
$805,000 | — | 30 Sep 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.16%
|
204,449
|
$770,773 | — | 30 Sep 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.16%
|
202,355
|
$762,878 | — | 30 Sep 2025 | |
| Hennion & Walsh Asset Management, Inc. |
13F
|
Company |
0.14%
|
185,575
|
$699,618 | — | 30 Sep 2025 | |
| Susquehanna Portfolio Strategies, LLC |
13F
|
Company |
0.14%
|
185,227
|
$698,306 | — | 30 Sep 2025 | |
| ExodusPoint Capital Management, LP |
13F
|
Company |
0.14%
|
178,177
|
$671,727 | — | 30 Sep 2025 | |
| COMMONWEALTH EQUITY SERVICES, LLC |
13F
|
Company |
0.13%
|
174,097
|
$656,000 | — | 30 Sep 2025 | |
| Invesco Ltd. |
13F
|
Company |
0.12%
|
161,943
|
$610,525 | — | 30 Sep 2025 | |
| Rafferty Asset Management, LLC |
13F
|
Company |
0.12%
|
156,194
|
$588,851 | — | 30 Sep 2025 | |
| GROUP ONE TRADING LLC |
13F
|
Company |
0.11%
|
140,255
|
$528,761 | — | 30 Sep 2025 | |
| RHUMBLINE ADVISERS |
13F
|
Company |
0.1%
|
130,743
|
$492,889 | — | 30 Sep 2025 | |
| Caption Management, LLC |
13F
|
Company |
0.1%
|
130,000
|
$490,100 | — | 30 Sep 2025 | |
| Baird Financial Group, Inc. |
13F
|
Company |
0.09%
|
119,440
|
$450,289 | — | 30 Sep 2025 | |
| Richard I. Eisenstadt |
3/4/5
|
Chief Financial Officer |
—
mixed-class rows
|
236,037
mixed-class rows
|
$441,118 | — | 30 Jan 2024 | |
| GSA CAPITAL PARTNERS LLP |
13F
|
Company |
0.09%
|
116,770
|
$440,000 | — | 30 Sep 2025 | |
| Jump Financial, LLC |
13F
|
Company |
0.09%
|
115,800
|
$436,566 | — | 30 Sep 2025 | |
| IMC-Chicago, LLC |
13F
|
Company |
0.09%
|
115,360
|
$434,907 | — | 30 Sep 2025 | |
| SILVERCREST ASSET MANAGEMENT GROUP LLC |
13F
|
Company |
0.08%
|
103,500
|
$390,195 | — | 30 Sep 2025 | |
| David Drutz |
3/4/5
|
Director |
—
mixed-class rows
|
59,874
mixed-class rows
|
$382,005 | — | 19 Aug 2024 |
Institutional Holders of Altimmune, Inc. - Common stock, par value $0.0001 per share (ALT) as of Q4 2025
As of 31 Dec 2025,
Altimmune, Inc. - Common stock, par value $0.0001 per share (ALT) was held by
182 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
54,848,617 shares.
The largest 10 holders included
BlackRock, Inc., VANGUARD GROUP INC, STATE STREET CORP, GEODE CAPITAL MANAGEMENT, LLC, TANG CAPITAL MANAGEMENT LLC, JANE STREET GROUP, LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, MORGAN STANLEY, GOLDMAN SACHS GROUP INC, and D. E. Shaw & Co., Inc..
This page lists
182
institutional shareholders reporting positions in this security
for the Q4 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
157
Q4 2025 holders
182
Holder diff
25
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 Value $ | Q4 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.