Sellas Life Sciences Group Inc
Ownership
Ownership Structure
Who owns Sellas Life Sciences Group Inc (SLS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.6% of the shares are freely tradable; institutional investors hold 27.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.46 | 15,070,302 | +23.5 | 06/30/2026 |
| State Street Corp | 6.44 | 12,996,558 | +54.8 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.07 | 8,226,105 | +9.3 | 06/30/2026 |
| Geode Capital Management, LLC | 2.42 | 4,884,175 | +24.8 | 06/30/2026 |
| Anson Funds Management LP | 2.23 | 4,500,000 | +0.0 | 06/30/2026 |
| JONES FINANCIAL COMPANIES LLLP | 1.14 | 2,304,561 | +37.6 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 1.07 | 2,161,099 | +47.7 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.19 | 6,449,805 | +8.9 | 09/30/2026 |
| State Street® SPDR® S&P® Biotech ETF | 2.82 | 5,702,972 | -1.9 | 09/30/2026 |
| iShares Russell 2000 ETF | 2.58 | 5,214,545 | -1.1 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.