Who owns SELLAS Life Sciences Group, Inc.?
Institutional ownership of SLS from SEC Form 13F filings across 151 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
151
13F holders
$781.0M
value, 2026 filers
28.9%
of shares outstanding (53.7M sh)
48
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of SLS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 15.1M | $222.4M | 0.0% | 8.1% | +23.5% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 8.2M | $121.4M | 0.0% | 4.4% | -45.3% |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | 4.9M | $72.1M | 0.0% | 2.6% | +24.8% |
| 4 | JONES FINANCIAL COMPANIES LLLP | 2.3M | $28.6M | 0.0% | 1.2% | +37.6% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.2M | $31.9M | 0.0% | 1.2% | +47.7% |
| 6 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 2.1M | $30.3M | 0.0% | 1.1% | +416.5% |
| 7 | NORTHERN TRUST CORP | 1.6M | $23.9M | 0.0% | 0.9% | +27.0% |
| 8 | VANGUARD FIDUCIARY TRUST CO | 1.3M | $19.7M | 0.0% | 0.7% | +11.0% |
| 9 | UBS Group AG | 1.3M | $18.5M | 0.0% | 0.7% | +68.1% |
| 10 | MORGAN STANLEY | 1.2M | $18.2M | 0.0% | 0.7% | -7.5% |
| 11 | DAGCO, INC. | 1.2M | $18.2M | 3.4% | 0.7% | +19.8% |
| 12 | BNP PARIBAS FINANCIAL MARKETS | 1.1M | $15.8M | 0.0% | 0.6% | +2180.1% |
| 13 | BANK OF AMERICA CORP /DE/ | 787,949 | $11.6M | 0.0% | 0.4% | +22.8% |
| 14 | WELLINGTON MANAGEMENT GROUP LLP | 597,309 | $8.8M | 0.0% | 0.3% | +73.2% |
| 15 | GOLDMAN SACHS GROUP INC | 585,035 | $8.6M | 0.0% | 0.3% | +5.2% |
| 16 | Sixth Street Partners Management Company, L.P.NEW | 565,008 | $8.3M | 1.4% | 0.3% | new |
| 17 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 565,008 | $8.3M | 0.0% | 0.3% | +17.6% |
| 18 | Bank of New York Mellon Corp | 530,025 | $7.8M | 0.0% | 0.3% | +10.8% |
| 19 | JANE STREET GROUP, LLCNEW | 508,429 | $7.5M | 0.0% | 0.3% | new |
| 20 | Nuveen, LLC | 418,729 | $6.2M | 0.0% | 0.2% | -37.6% |
| 21 | Invesco Ltd. | 375,342 | $5.5M | 0.0% | 0.2% | -46.2% |
| 22 | Swiss National BankNEW | 360,400 | $5.3M | 0.0% | 0.2% | new |
| 23 | WELLS FARGO & COMPANY/MN | 328,819 | $4.9M | 0.0% | 0.2% | +45.7% |
| 24 | CITIGROUP INC | 326,591 | $4.8M | 0.0% | 0.2% | +1173.5% |
| 25 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLCNEW | 273,403 | $4.0M | 0.0% | 0.1% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.