Atossa Therapeutics Ownership | Who Owns Atossa Therapeutics?
Atossa Therapeutics Ownership Summary
Atossa Therapeutics is owned by 5.25% institutional investors, 0.33% insiders, and 94.42% retail investors. Blackrock is the largest institutional shareholder, holding 7.34% of ATOS shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.05% of its assets in Atossa Therapeutics shares.
ATOS Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Atossa Therapeutics | 5.25% | 0.33% | 94.42% |
| Sector | Healthcare Stocks | 232.12% | 10.72% | -142.83% |
| Industry | Biotech Stocks | 383.51% | 10.54% | -294.04% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 9.20M | 7.34% | $10.94M |
| Vanguard group | 6.15M | 4.76% | $3.63M |
| Ameriprise financial | 2.95M | 2.29% | $2.56B |
| Renaissance | 2.06M | 1.60% | $1.22M |
| Blackrock funding, inc. /de | 2.00M | 1.55% | $1.18M |
| Geode capital management | 1.37M | 1.06% | $809.62K |
| State street | 454.50K | 0.35% | $394.05K |
| Ubs group | 390.01K | 0.30% | $230.10K |
| Connor, clark & lunn investment management | 266.01K | 0.21% | $156.95K |
| Northern trust | 263.38K | 0.20% | $228.35K |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| R squared | 28.10K | 0.01% | $16.58K |
| Point72 asia (singapore) pte. | 44.11K | 0.01% | $38.24K |
| Greenberg financial group | 18.22K | 0.00% | $10.75M |
| Graham capital management | 165.45K | 0.00% | $143.44K |
| Renaissance | 2.06M | 0.00% | $1.22M |
| Lvm capital management ltd/mi | 21.00K | 0.00% | $12.00K |
| Xtx topco | 24.85K | 0.00% | $21.54K |
| Planning capital management | 1.00K | 0.00% | $1.19K |
| Ameriprise financial | 2.95M | 0.00% | $2.56B |
| Pfg investments | 21.75K | 0.00% | $12.83K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock | 9.20M | 0.00% | 6.45M |
| Renaissance | 2.06M | 0.00% | 514.17K |
| Graham capital management | 165.45K | 0.00% | 165.45K |
| Susquehanna group, llp | 226.18K | - | 154.40K |
| Ubs group | 390.01K | - | 129.29K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Laurion capital management lp | - | - | -2.23M |
| Y-intercept (hong kong) | - | - | -386.33K |
| Goldman sachs group | - | - | -334.95K |
| Gsa capital partners llp | - | - | -310.75K |
| Qube research | 138.64K | 0.00% | -277.73K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Graham capital management | 165.45K | 0.00% | 165.45K | $143.44K |
| R squared | 28.10K | 0.01% | 28.10K | $16.58K |
| Stonex group | 19.87K | 0.00% | 19.87K | $11.72K |
| Greenberg financial group | 18.22K | 0.00% | 18.22K | $10.75M |
| Rockefeller capital management | 5.00K | - | 5.00K | $4.33K |
Sold Out
| Holder | Change |
|---|---|
| Eversource wealth advisors | -2.00 |
| Larson financial group | -20.00 |
| Capital performance advisors llp | -25.00 |
| True wealth design | -29.00 |
| Twin peaks wealth advisors | -100.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 18 | -74.29% | 6,781,735 | -65.01% | 5 | 2.33% | 7 | -65.00% | 2 | -92.00% |
| Sep 30, 2025 | 20 | -76.74% | 6,698,329 | -68.63% | 5 | 1.90% | 6 | -85.00% | 3 | -88.00% |
| Jun 30, 2025 | 86 | - | 21,349,077 | -24.72% | 16 | 3.43% | 39 | 44.44% | 25 | -19.35% |
| Mar 31, 2025 | 86 | -1.15% | 28,358,791 | -5.26% | 21 | 3.88% | 27 | -32.50% | 31 | 47.62% |
| Dec 31, 2024 | 87 | -4.40% | 29,932,716 | 9.47% | 23 | 5.04% | 40 | 11.11% | 21 | -19.23% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 3.94M | 3.05% | - |
| Vanguard Total Stock Mkt Idx Inv | 3.85M | 2.98% | -85.03K |
| iShares Russell 2000 ETF | 3.15M | 2.44% | - |
| Columbia Small Cap Value Discv A | 2.09M | 1.62% | 57.50K |
| Columbia Small Cap Value I A | 2.09M | 1.62% | 57.50K |
| Columbia Small Cap Value I | 2.04M | 1.58% | 2.04M |
| Columbia Small Cap Value Discovery Fund | 2.04M | 1.58% | 2.04M |
| Fidelity Small Cap Index | 1.29M | 1.00% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 1.17M | 0.90% | -501.45K |
| iShares Russell 2000 Value ETF | 1.01M | 0.78% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 21, 2025 | QUAY STEVEN C | President & CEO | Buy | $9.89K |
| Mar 26, 2025 | Remmel H. Lawrence | - | Buy | $7.00K |
| Apr 10, 2024 | Finn Jonathan | - | Buy | $44.25K |
| Nov 15, 2023 | WEAVER GREGORY L | Former EVP, CFO, & Director | Sell | $32.50K |
| Jun 20, 2023 | WEAVER GREGORY L | EVP & CFO | Buy | $48.50K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | - | - |
| 2025 Q4 | - | - |
| 2025 Q2 | 1 | - |
| 2025 Q1 | 1 | - |
| 2024 Q2 | 1 | - |
ATOS Ownership FAQ
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