Sellas Life Sciences Group ISLS
13F holders, Q2 2025 (June 30)79holders +34
39new positions
6sold out
2famous investors
$2.19avg. 13F price*
At the end of Q2 2025, 79 institutions reported holding Sellas Life Sciences Group I (SLS) in their 13F filings, up 34 from Q1 2025. 39 opened new positions and 6 sold out. The largest holders were Vanguard Group Inc. ($14.6M), BlackRock, Inc. ($10.1M) and Marshall Wace, LLP ($5.9M). 2 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Sellas Life Sciences Group I
- CUSIP
- 81642T209
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 39 | $8.6M |
| Exits | 6 | $175K |
All 13F filers, Q1 2025 → Q2 2025: 20,250,550 shares bought and 7,768,387 shares sold, net +12,482,163 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 79 holders
| Vanguard Group Inc. | 0.00% | Add +134.4% | 6,654,799 | $14.6M |
| BlackRock, Inc. | 0.00% | Add +752.5% | 4,590,273 | $10.1M |
| Marshall Wace, LLP | 0.01% | Add +23550.0% | 2,715,489 | $5.9M |
| Geode Capital Management, LLC | 0.00% | Add +168.2% | 2,200,428 | $4.8M |
| Susquehanna International Group, LLP | 0.01% | Add +116.3% | 1,489,672 | $3.3M |
| Millennium Management | 0.00% | New | 1,127,225 | $2.5M |
| State Street Corp. | 0.00% | Add +301.7% | 1,112,705 | $2.4M |
| Morgan Stanley | 0.00% | Add +1532.0% | 1,084,478 | $2.4M |
| Nuveen, LLC | 0.00% | New | 971,329 | $2.1M |
| Northern Trust Corp. | 0.00% | Add +324.9% | 698,493 | $1.5M |
| Goldman Sachs Group Inc. | 0.00% | New | 465,506 | $1.0M |
| Gsa Capital Partners LLP | 0.07% | Add +1777.0% | 426,584 | $934K |
| UBS Group AG | 0.00% | Add +397.6% | 309,687 | $678K |
| Charles Schwab Investment Management Inc. | 0.00% | Add +1711.2% | 294,106 | $644K |
| Anson Funds Management LP | 0.11% | Reduce -96.4% | 275,000 | $602K |
| Opus Capital Group, LLC | 0.06% | Add +0.2% | 240,000 | $526K |
| Bank of New York Mellon Corp | 0.00% | New | 201,460 | $441K |
| Two Sigma Investments, LP | 0.00% | Add +309.3% | 197,642 | $433K |
| Barclays PLC | 0.00% | New | 172,803 | $378K |
| Rhumbline Advisers | 0.00% | New | 135,789 | $297K |
| Citadel Advisors | 0.00% | Reduce -75.7% | 84,993 | $186K |
| XTX Topco Ltd | 0.01% | New | 76,900 | $168K |
| LPL Financial LLC | 0.00% | Add +2.8% | 67,560 | $148K |
| JPMorgan Chase & Co. | 0.00% | New | 61,892 | $136K |
| MetLife Investment Management, LLC | 0.00% | New | 58,844 | $129K |
| Atom Investors LP | 0.01% | Reduce -14.9% | 54,624 | $120K |
| Wells Fargo & Company | 0.00% | Add +1692.0% | 53,815 | $118K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | New | 52,210 | $114K |
| Mariner, LLC | 0.00% | Reduce -0.2% | 51,109 | $112K |
| Invesco Ltd. | 0.00% | New | 50,166 | $110K |
| Alliancebernstein L.P. | 0.00% | New | 49,960 | $109K |
| New York State Common Retirement Fund | 0.00% | New | 49,300 | $108K |
| T. Rowe Price Associates Inc. | 0.00% | New | 47,959 | $106K |
| Jane Street Group, LLC | 0.00% | Reduce -20.3% | 46,682 | $102K |
| Intech Investment Management LLC | 0.00% | New | 46,217 | $101K |
| Citigroup Inc. | 0.00% | New | 42,415 | $93K |
| Bank of America Corp. | 0.00% | Add +5459.3% | 34,579 | $76K |
| Manufacturers Life Insurance Company, The | 0.00% | New | 34,551 | $76K |
| Cubist Systematic Strategies, LLC | 0.00% | New | 31,314 | $69K |
| Voya Investment Management LLC | 0.00% | New | 27,503 | $60K |
| Quadrature Capital Ltd | 0.00% | Add +17.5% | 24,284 | $53K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | New | 23,351 | $51K |
| Independent Financial Group, LLC | 0.00% | No change | 23,250 | $51K |
| SG Americas Securities, LLC | 0.00% | New | 20,910 | $46K |
| Great Valley Advisor Group, Inc. | 0.00% | New | 20,000 | $44K |
| Simon Quick Advisors, LLC | 0.00% | New | 20,000 | $44K |
| ProShare Advisors LLC | 0.00% | New | 19,571 | $43K |
| Commonwealth Equity Services, LLC | 0.00% | Add +58.4% | 19,248 | $42K |
| Equitable Holdings, Inc. | 0.00% | Add +41.5% | 17,060 | $37K |
| Prosperity Financial Group, Inc. | 0.02% | No change | 16,500 | $36K |
| Squarepoint Ops LLC | 0.00% | New | 16,122 | $35K |
| Blair William & Co. | 0.00% | New | 16,002 | $35K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -26.0% | 15,465 | $34K |
| Grange Capital, LLC | 0.03% | No change | 13,501 | $30K |
| Cibc World Markets Corp. | 0.00% | New | 11,759 | $26K |
| Victory Capital Management Inc. | 0.00% | New | 11,647 | $26K |
| Calton & Associates, Inc. | 0.00% | No change | 11,000 | $24K |
| Legal & General Group Plc | 0.00% | New | 10,626 | $23K |
| BNP Paribas Financial Markets | 0.00% | New | 10,425 | $23K |
| Brooklyn FI, LLC | 0.01% | Add +1.0% | 10,240 | $22K |
| Marshall Financial Group, LLC | 0.00% | New | 10,309 | $22K |
| Private Wealth Management Group, LLC | 0.01% | No change | 10,000 | $22K |
| Nemes Rush Group LLC | 0.00% | No change | 10,000 | $22K |
| Ameritas Investment Partners, Inc. | 0.00% | New | 9,744 | $21K |
| Osaic Holdings, Inc. | 0.00% | Add +188.0% | 7,660 | $17K |
| California State Teachers Retirement System | 0.00% | New | 5,955 | $13K |
| SBI Securities Co., Ltd. | 0.00% | Add +5.5% | 5,726 | $13K |
| Caitong International Asset Management Co., Ltd | 0.01% | New | 5,124 | $11K |
| Amalgamated Bank | 0.00% | New | 3,259 | $7K |
| Raymond James Financial Inc. | 0.00% | New | 2,652 | $6K |
| Deutsche Bank AG | 0.00% | New | 2,335 | $5K |
| Royal Bank of Canada | 0.00% | Reduce -80.4% | 2,574 | $5K |
| Global Retirement Partners, LLC | 0.00% | — | 1,000 | $2K |
| Avion Wealth | 0.00% | No change | 573 | $1K |
| Quantbot Technologies LP | 0.00% | New | 389 | $852 |
| Jones Financial Companies LLLP | 0.00% | No change | 374 | $729 |
| Sterling Capital Management LLC | 0.00% | New | 231 | $506 |
| Caldwell Sutter Capital, Inc. | 0.00% | No change | 100 | $219 |
| Parkside Financial Bank & Trust | 0.00% | No change | 2 | $5 |
"% of holder's portfolio" is SLS's weight in each manager's 13F, not the share of Sellas Life Sciences Group I the manager owns.