Companies / Altimmune Inc
Altimmune Inc
Nasdaq: ALTCIK 1326190GAITHERSBURG, MD
Financials ยท FY2025
Ownership
194.5M shares outstanding ยท as of Aug 7, 2026
Ownership
| Insiders | 0.12% | 235,100 |
| 10%+ / strategic | 18.88% | 36,719,952 |
| Institutions | 29.13% | 56,658,712 |
| Public float | 51.87% | 100,903,937 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 13
View all โ| Insider | % of shares | Shares |
|---|---|---|
Garg Vipin KFormerDirector | 0.22% | 424,519 |
Roberts M ScotChief Scientific Officer | 0.06% | 112,824 |
Jordt Raymond MFormerChief Business Officer | 0.04% | 70,107 |
Durso Jerome BenedictCEOPresident and CEO ยท Director | 0.02% | 47,500 |
Weaver Gregory LChief Financial Officer | 0.02% | 38,078 |
Gill JohnDirector | 0.01% | 21,700 |
Pisano WayneDirector | <0.01% | 13,498 |
Sohn Catherine A.Director | <0.01% | 1,500 |
Hodges PhilipDirector | โ | โ |
Jorkasky DianeDirector | โ | โ |
Institutional holders 188
View all โ| Holder | Value | % of shares |
|---|---|---|
| $61.97M | 10.48% | |
| $36.78M | 6.22% | |
| $34.26M | 4.88% | |
| $12.38M | 2.07% | |
| $10.04M | 1.68% | |
| $9.57M | 1.60% | |
| $7.64M | 1.27% | |
| $6.44M | 0.92% | |
| $4.94M | 0.70% | |
| $4.91M | 0.70% |
Activity
Jun 30, 2026View all โ
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares ฮ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common stock | $32.47M | +10.7M +110.06% | 20,385,284 10.48% of shares | medium |
| Q2 2026 as of | State Street Corporation 13F manager | Add | Common stock | $21.22M | +7.0M +136.31% | 12,098,540 6.22% of shares | medium |
| Q1 2026 as of | Marshall Wace, LLP 13F manager | Add | Common stock | $9.53M | +3.1M +335.41% | 4,017,901 2.07% of shares | medium |
| Q1 2026 as of | Millennium Management LLC 13F manager | Add | Common stock | $9.40M | +3.1M +1471.10% | 3,258,191 1.68% of shares | medium |
| Q1 2026 as of | Tang Capital Management, LLC 13F manager | Trim | Common stock | $-4.51M | -1.5M -68.75% | 666,022 0.34% of shares | low |
| Q1 2026 as of | Two Sigma Investments, LP 13F manager | Add | Common stock | $3.74M | +1.2M +95.85% | 2,478,900 1.27% of shares | low |
| Q1 2026 as of | Knoll Capital Management, LLC 13F manager | Trim | Common stock | $-2.96M | -962K -85.73% | 160,000 0.08% of shares | low |
| Q1 2026 as of | Geode Capital Management, LLC 13F manager | Add | Common stock | $2.51M | +815K +35.54% | 3,107,096 1.60% of shares | low |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | โ |
| Vanguard Group Inc | Passive13G/A | โ |
| Viking Global Investors LP | Passive13G | โ |
| Tang Capital Management, LLC | Passive13G/A | โ |
| Deep Track Capital, LP | Passive13G | โ |
| TCG Crossover GP II, LLC | Passive13G | โ |
| RA Capital Management, L.P. | Passive13G | โ |
| State Street Corporation | Passive13G | โ |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| ALT | โ | 02155H200 |