Security key
04962H506
ATOSSA THERAPEUTICS, INC. - Common Stock (ATOS)
CUSIP: 04962H506
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 21,950,342
- Total 13F value
- $12,944,911
- Share change
- +2,614,167
- Put/Call ratio
- 56%
- SEC-reported price per share
- $0.59
- Number of holders
- 62
- Value change
- +$1,318,964
- Number of buys
- 30
- Number of sells
- 19
- Shares outstanding
- 129,337,627
Holder snapshot
7 facts
Show 1 more fact
Security identity
1 fact
Report period
Q4 2025
Institutions
62
Top holders
10
ATOS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
ATOSSA THERAPEUTICS, INC. SEC filings
ATOSSA THERAPEUTICS, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 04962H506
Recent filing periods:
Ownership snapshot
Top reported holders of ATOS - ATOSSA THERAPEUTICS, INC. - Common Stock (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.
Largest current holder
VANGUARD GROUP INC
13D/G signal
VANGUARD GROUP INC
Evidence rows
15
Latest as of
30 Sep 2025
13F
13D/G
Lead comparable stake: 4.5%
13D/G row: VANGUARD GROUP INC
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 4.5%.
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.
Comparable ownership
Top 5
VANGUARD GROUP INC
4.5%
CVI Investments, Inc.
4.3%
BlackRock, Inc.
1.6%
AMERIPRISE FINANCIAL INC
2.3%
MILLENNIUM MANAGEMENT LLC
1.3%
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 |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13F
13D/G
Company · The Vanguard Group
|
4.5%
from 13D/G
|
$5,270,358
6,078,844 shares
|
— | 30 Sep 2025 |
| CVI Investments, Inc. |
13D/G
|
4.3%
|
$4,530,000
5,662,500 shares
|
$0 | 31 Dec 2024 |
| BlackRock, Inc. |
13F
13D/G
Company
|
1.6%
from 13D/G
|
$1,731,943
1,997,627 shares
|
— | 30 Sep 2025 |
| AMERIPRISE FINANCIAL INC |
13F
Company
|
2.3%
|
$2,558,955
2,951,505 shares
|
— | 30 Sep 2025 |
| MILLENNIUM MANAGEMENT LLC |
13F
Company
|
1.3%
|
$1,446,718
1,668,648 shares
|
— | 30 Sep 2025 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
1.2%
|
$1,342,691
1,548,663 shares
|
— | 30 Sep 2025 |
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 Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
62
Shares
21,950,342
Rows available
62
| 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 failed the local validity check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
63
Q4 2025 holders
62
Holder diff
-1
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend