# ATOSSA THERAPEUTICS INC (ATOS)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/ATOS/

- Reporting holders: 35
- Reported value: $2.9M
- Shares held by institutions: 1,530,563 of 9,979,298 outstanding
- Held through calls: 4.0%
- Held through puts: 0.1%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $698.2K | 361,747 | 0.0% | 2 |
| [AMERIPRISE FINANCIAL INC](https://holderbook.com/funds/820027-ameriprise-financial-inc/) | $498.4K | 258,234 | 0.0% | 2 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $317.2K | 164,358 | 0.0% | 2 |
| [RENAISSANCE TECHNOLOGIES LLC](https://holderbook.com/funds/1037389-renaissance-technologies-llc/) | $254.8K | 132,043 | 0.0% | 2 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $178.3K | 92,382 | 0.0% | 2 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $159.5K | 82,620 | 0.0% | 2 |
| [STATE STREET CORP](https://holderbook.com/funds/93751-state-street-corp/) | $153.5K | 79,522 | 0.0% | 2 |
| [Aster Capital Management (DIFC) Ltd](https://holderbook.com/funds/2040915-aster-capital-management-difc-ltd/) | $120.2K | 144,853 | 0.0% | 1 |
| [JANE STREET GROUP, LLC](https://holderbook.com/funds/1595888-jane-street-group-llc/) | $109.2K | 56,602 | 0.0% | 1 |
| [VANGUARD FIDUCIARY TRUST CO](https://holderbook.com/funds/933478-vanguard-fiduciary-trust-co/) | $101.5K | 52,583 | 0.0% | 2 |
| [MILLENNIUM MANAGEMENT LLC](https://holderbook.com/funds/1273087-millennium-management-llc/) | $89.8K | 46,508 | 0.0% | 2 |
| [SIMPLEX TRADING, LLC](https://holderbook.com/funds/1488542-simplex-trading-llc/) | $89.0K | 0 | 0.0% | 2 |
| [SUSQUEHANNA INTERNATIONAL GROUP, LLP](https://holderbook.com/funds/1446194-susquehanna-international-group-llp/) | $51.9K | 15,574 | 0.0% | 2 |
| [NORTHERN TRUST CORP](https://holderbook.com/funds/73124-northern-trust-corp/) | $39.1K | 20,249 | 0.0% | 2 |
| [MORGAN STANLEY](https://holderbook.com/funds/895421-morgan-stanley/) | $23.8K | 12,345 | 0.0% | 2 |
| [GROUP ONE TRADING LLC](https://holderbook.com/funds/932540-group-one-trading-llc/) | $8.0K | 54 | 0.0% | 2 |
| [Vanguard Global Advisers, LLC](https://holderbook.com/funds/1811242-vanguard-global-advisers-llc/) | $6.0K | 3,089 | 0.0% | 2 |
| [ROYAL BANK OF CANADA](https://holderbook.com/funds/1000275-royal-bank-of-canada/) | $4.0K | 1,994 | 0.0% | 2 |
| [JONES FINANCIAL COMPANIES LLLP](https://holderbook.com/funds/815917-jones-financial-companies-lllp/) | $3.9K | 2,061 | 0.0% | 2 |
| [MCF Advisors LLC](https://holderbook.com/funds/1602905-mcf-advisors-llc/) | $2.1K | 1,066 | 0.0% | 1 |
| [MERCER GLOBAL ADVISORS INC /ADV](https://holderbook.com/funds/853758-mercer-global-advisors-inc-adv/) | $1.3K | 666 | 0.0% | 1 |
| [OSAIC HOLDINGS, INC.](https://holderbook.com/funds/1677044-osaic-holdings-inc/) | $1.1K | 587 | 0.0% | 2 |
| [JPMORGAN CHASE & CO](https://holderbook.com/funds/19617-jpmorgan-chase-co/) | $772 | 390 | 0.0% | 2 |
| [Rockefeller Capital Management L.P.](https://holderbook.com/funds/1739439-rockefeller-capital-management-l-p/) | $643 | 333 | 0.0% | 2 |
| [WELLS FARGO & COMPANY/MN](https://holderbook.com/funds/72971-wells-fargo-company-mn/) | $440 | 228 | 0.0% | 2 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 35 | $2.9M |
| Q1 2026 | 34 | $8.9M |
| Q4 2025 | 66 | $13.2M |
| Q3 2025 | 66 | $17.2M |
| Q2 2025 | 84 | $18.0M |
| Q1 2025 | 83 | $19.3M |
| Q4 2024 | 85 | $28.5M |
| Q3 2024 | 88 | $43.0M |
| Q2 2024 | 77 | $32.1M |
| Q1 2024 | 64 | $38.1M |
| Q4 2023 | 49 | $15.3M |
| Q3 2023 | 53 | $12.8M |