Security key
02155H200
Altimmune, Inc. - Common stock, par value $0.0001 per share (ALT)
CUSIP: 02155H200
Q1 2021 13F Holders as of 31 Mar 2021
- Security type / class
- Equity / Common stock, par value $0.0001 per share
- Total 13F shares
- 23,819,490
- Total 13F value
- $336,535,131
- Share change
- +3,322,757
- Put/Call ratio
- 85%
- SEC-reported price per share
- $14.13
- Number of holders
- 92
- Value change
- +$49,552,065
- Number of buys
- 58
- Number of sells
- 34
- Shares outstanding
- 129,919,091
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2021
Institutions
92
Top holders
10
ALT full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2021
Previous quarter: Q4 2020
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
Venrock Adviser, LLC
Disclosed value leader
Venrock Adviser, LLC
Comparable rows
15/15
Latest evidence
31 Dec 2020
13F
Lead comparable stake: 3.5%
Showing 1-6 of 15 holder rows.
Quick read
Venrock Adviser, LLC leads the comparable SEC ownership view at 3.5%.
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 Venrock Adviser, LLC's linked filing trail.
Comparable ownership
Top 5
Venrock Adviser, LLC
3.5%
BAKER BROS. ADVISORS LP
1.5%
Capital World Investors
1.1%
UBS Group AG
1.1%
VANGUARD GROUP INC
0.95%
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 |
|---|---|---|---|---|---|
| Venrock Adviser, LLC |
13F
Company
|
3.5%
|
$50,760,000
4,500,000 shares
|
— | 31 Dec 2020 |
| BAKER BROS. ADVISORS LP |
13F
Company
|
1.5%
|
$21,257,000
1,884,451 shares
|
— | 31 Dec 2020 |
| Capital World Investors |
13F
Company
|
1.1%
|
$15,837,000
1,404,000 shares
|
— | 31 Dec 2020 |
| UBS Group AG |
13F
Company
|
1.1%
|
$15,811,000
1,401,690 shares
|
— | 31 Dec 2020 |
| VANGUARD GROUP INC |
13F
Company
|
0.95%
|
$13,956,000
1,237,226 shares
|
— | 31 Dec 2020 |
| CREDIT SUISSE AG/ |
13F
Company
|
0.92%
|
$13,465,000
1,193,719 shares
|
— | 31 Dec 2020 |
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 Q1 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
92
Shares
23,819,490
Rows available
92
| 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 Q1 2021 vs Q4 2020 Across Filers
Q4 2020 holders
83
Q1 2021 holders
92
Holder diff
9
| Investor | Q4 2020 Shares | Q1 2021 Shares | Share Diff | Share Chg % | Q4 2020 value | Q1 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend