Institutional Ownership
Altimmune Inc
CUSIP 02155H200COM NEWALTQ1 2026
13D / 13G Filings
54
Schedule 13D/13G on record
Beneficial Filers
22
Distinct reporting persons
Largest Stake
20.8%
Max % of class reported
Institutional Holders
166
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
54 filings · latest Jan 30, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Jan 30, 2026 | The Vanguard Group | 13G/A | 9.1% | 9.49M | SEC |
| 2 | Jul 16, 2025 | Blackrock, Inc. | 13G/A | 7.6% | 6.13M | SEC |
| 3 | May 15, 2025 | Ameriprise Financial, Inc. | 13G/A | 1.9% | 1.44M | SEC |
| 4 | Feb 14, 2025 | Ameriprise Financial, Inc. | 13G/A | 7.4% | 5.25M | SEC |
| 5 | Feb 5, 2025 | Blackrock, Inc. | 13G/A | 8.7% | 6.16M | SEC |
| 6 | Nov 14, 2024 | Ameriprise Financial Inc | 13G/A | 5.5% | 3.88M | SEC |
| 7 | Oct 17, 2024 | State Street Corp | 13G/A | 4.8% | 3.41M | SEC |
| 8 | Oct 16, 2024 | Millennium Management LLC | 13G/A | 0.2% | 144.2K | SEC |
| 9 | Jul 10, 2024 | State Street Corp | 13G/A | 5.5% | — | SEC |
| 10 | Apr 10, 2024 | State Street Corp | 13G/A | 12.2% | — | SEC |
44 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Altimmune Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 12.80M | $39.41M |
| 2 | State Street Corp | 7.15M | $22.01M |
| 3 | Marshall Wace, LLP | 4.02M | $12.38M |
| 4 | Millennium Management LLC | 3.26M | $10.04M |
| 5 | Geode Capital Management, LLC | 3.11M | $9.57M |
| 6 | Alyeska Investment Group, L.P. | 2.64M | $8.15M |
| 7 | Two Sigma Investments, LP | 2.48M | $7.64M |
| 8 | Nuveen, LLC | 2.33M | $7.19M |
| 9 | Goldman Sachs Group Inc | 1.35M | $4.16M |
| 10 | Susquehanna International Group, LLP | 1.33M | $4.08M |