Security key
02155H200
Altimmune, Inc. - Common stock, par value $0.0001 per share (ALT)
CUSIP: 02155H200
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common stock, par value $0.0001 per share
- Total 13F shares
- 67,254
- Total 13F value
- $204,452
- Share change
- +134
- SEC-reported price per share
- $3.04
- Number of holders
- 3
- Value change
- +$407
- Number of buys
- 1
- Shares outstanding
- 129,919,091
Holder snapshot
5 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
3
Top holders
3
ALT full security history
Ownership snapshot
Full 13F holder table
Previous quarter: Q1 2026
Altimmune, Inc. SEC filings
Altimmune, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 02155H200
Recent filing periods:
Ownership snapshot
Top reported holders 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. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Deep Track Capital, LP
Disclosed value leader
TCG Crossover GP II, LLC
Comparable rows
15/15
Latest evidence
24 Apr 2026
13D/G
13F
Lead comparable stake: 10%
13D/G row: Deep Track Capital, LP
Showing 1-6 of 15 holder rows.
Quick read
Deep Track Capital, LP leads the comparable SEC ownership view at 10%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Deep Track Capital, LP's linked filing trail.
Comparable ownership
Top 5
Deep Track Capital, LP
10%
TCG Crossover GP II, LLC
9.8%
BlackRock, Inc.
7.6%
VIKING GLOBAL INVESTORS LP
6.7%
RA CAPITAL MANAGEMENT, L.P.
6.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Deep Track Capital, LP |
13D/G
|
10%
|
$59,805,041
19,417,221 shares
|
$0 | 23 Apr 2026 |
| TCG Crossover GP II, LLC |
13D/G
Chen Yu
|
9.8%
|
$67,600,000
20,000,000 shares
|
$0 | 24 Apr 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
7.6%
from 13D/G
|
$39,409,453
12,795,277 shares
|
— | 31 Mar 2026 |
| VIKING GLOBAL INVESTORS LP |
13D/G
|
6.7%
|
$45,292,000
13,400,000 shares
|
$0 | 24 Apr 2026 |
| RA CAPITAL MANAGEMENT, L.P. |
13D/G
|
6.5%
|
$43,940,000
13,000,000 shares
|
$0 | 24 Apr 2026 |
| STATE STREET CORP |
13D/G
13F
STATE STREET CORPORATION · Company
|
5.5%
|
$24,151,959
7,145,550 shares
|
$0 | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
3
Shares
67,254
Rows available
3
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
173
Q2 2026 holders
3
Holder diff
-170
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend