| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Anson Funds Management LP | 4.9% | -13% | $31,046,889 | +$6,010,196 | 7,481,178 | +24% | Anson Funds Management LP | 31 Dec 2025 |
| VANGUARD GROUP INC | 6.7% | $14,661,610 | 6,694,799 | The Vanguard Group | 30 Jun 2025 | |||
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 3.7% | $24,560,261 | 6,514,658 | Highbridge Capital Management, LLC | 31 Dec 2025 | |||
| BlackRock, Inc. | 5.4% | $9,155,886 | 5,686,886 | BlackRock, Inc. | 30 Sep 2025 |
As of 31 Dec 2025, 109 institutional investors reported holding 35,354,015 shares of SELLAS Life Sciences Group, Inc. - Common Stock, par value $0.0001 per share (SLS). This represents 23% of the company’s total 152,677,102 outstanding shares.
The largest institutional shareholders of SELLAS Life Sciences Group, Inc. - Common Stock, par value $0.0001 per share (SLS) together control 22% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 5.5% | 8,467,400 | +24% | 0% | $31,922,098 |
| BlackRock, Inc. | 4.9% | 7,541,054 | +33% | 0% | $28,429,774 |
| GEODE CAPITAL MANAGEMENT, LLC | 2% | 3,077,337 | +36% | 0% | $11,604,041 |
| STATE STREET CORP | 1.4% | 2,188,171 | +61% | 0% | $8,249,405 |
| MILLENNIUM MANAGEMENT LLC | 0.91% | 1,387,849 | +341% | 0% | $5,232,191 |
| MARSHALL WACE, LLP | 0.88% | 1,340,668 | -43% | 0% | $5,054,320 |
| TWO SIGMA INVESTMENTS, LP | 0.71% | 1,082,207 | +642% | 0.01% | $4,079,920 |
| Nuveen, LLC | 0.67% | 1,023,961 | +2.6% | 0% | $3,860,333 |
| NORTHERN TRUST CORP | 0.61% | 930,750 | +27% | 0% | $3,508,927 |
| MORGAN STANLEY | 0.58% | 890,929 | -16% | 0% | $3,358,802 |
| DAGCO, INC. | 0.38% | 577,540 | 0.5% | $2,177,326 | |
| BARCLAYS PLC | 0.33% | 511,034 | +180% | 0% | $1,926,599 |
| Clear Street Group Inc. | 0.33% | 500,000 | 0.01% | $1,885,000 | |
| Everhart Financial Group, Inc. | 0.31% | 466,216 | +41% | 0.16% | $1,757,634 |
| JONES FINANCIAL COMPANIES LLLP | 0.28% | 429,243 | +114671% | 0% | $1,618,246 |
| GOLDMAN SACHS GROUP INC | 0.27% | 411,654 | +2037% | 0% | $1,551,936 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.27% | 408,401 | +39% | 0% | $1,539,672 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.23% | 349,755 | -59% | 0% | $1,318,577 |
| GSA CAPITAL PARTNERS LLP | 0.23% | 345,052 | -34% | 0.11% | $1,301,000 |
| Opus Capital Group, LLC | 0.21% | 317,100 | +27% | 0.13% | $1,195,000 |
| WELLS FARGO & COMPANY/MN | 0.2% | 299,305 | +295% | 0% | $1,128,380 |
| Bank of New York Mellon Corp | 0.17% | 256,409 | +25% | 0% | $966,663 |
| Mariner, LLC | 0.1% | 159,150 | +46% | 0% | $599,996 |
| RHUMBLINE ADVISERS | 0.08% | 129,309 | -5.4% | 0% | $487,489 |
| XTX Topco Ltd | 0.08% | 118,440 | 0.01% | $446,519 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 35,354,015 | $133,285,596 | +$23,383,483 | $3.77 | 109 |
| 2025 Q3 | 32,917,301 | $53,012,951 | +$9,796,863 | $1.61 | 92 |
| 2025 Q2 | 26,771,579 | $58,629,839 | +$27,498,028 | $2.19 | 78 |
| 2025 Q1 | 14,287,843 | $15,431,614 | +$8,743,246 | $1.08 | 43 |
| 2024 Q4 | 6,195,241 | $6,443,955 | +$751,049 | $1.04 | 29 |
| 2024 Q3 | 5,385,570 | $6,729,539 | +$1,661,405 | $1.25 | 30 |
| 2024 Q2 | 4,056,846 | $4,828,846 | -$3,466,325 | $1.19 | 29 |
| 2024 Q1 | 7,717,105 | $7,794,727 | +$4,207,509 | $1.01 | 27 |
| 2023 Q4 | 3,493,044 | $3,702,505 | +$352,826 | $1.06 | 29 |
| 2023 Q3 | 2,751,676 | $4,512,830 | -$594,241 | $1.64 | 25 |
| 2023 Q2 | 3,114,137 | $4,889,035 | +$175,383 | $1.57 | 22 |
| 2023 Q1 | 2,996,127 | $4,284,993 | +$1,438,716 | $1.43 | 20 |
| 2022 Q4 | 1,889,269 | $4,456,259 | +$91,291 | $2.36 | 27 |
| 2022 Q3 | 2,186,943 | $4,418,000 | -$1,738,313 | $2.02 | 25 |
| 2022 Q2 | 2,979,307 | $6,641,000 | +$1,671,317 | $2.23 | 23 |
| 2022 Q1 | 1,688,629 | $11,276,000 | -$279,247 | $6.68 | 25 |
| 2021 Q4 | 1,733,782 | $9,586,000 | -$1,340,161 | $5.53 | 26 |
| 2021 Q3 | 1,859,470 | $17,100,000 | -$844,204 | $9.16 | 29 |
| 2021 Q2 | 1,897,926 | $21,282,000 | +$4,739,163 | $11.10 | 28 |
| 2021 Q1 | 1,552,743 | $13,246,990 | +$5,287,808 | $8.54 | 28 |
| 2020 Q4 | 925,075 | $5,374,000 | +$2,503,596 | $5.81 | 17 |
| 2020 Q3 | 616,674 | $1,633,000 | +$397,179 | $2.65 | 10 |
| 2020 Q2 | 455,904 | $1,335,000 | +$144,563 | $2.93 | 12 |
| 2020 Q1 | 415,637 | $720,000 | -$87,849 | $1.74 | 10 |
| 2019 Q4 | 389,002 | $1,672,000 | +$1,672,000 | $4.30 | 9 |