SLS · SELLAS Life Sciences Group, Inc.
Market Cap
$2.80B
Shares
201.95M
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 207
Total Value: $1,530,268,910
Total Shares: 103,676,763
Showing 1–100
of 232 holdings by value
· page 1 of 3
Institutional Ownership Trend
26 quarters
Superinvestors Holding SLS
All superinvestors →Holder Concentration
Across 207 13F filers · Δ vs Mar 31, 2026Top Holder
14.5%
−3.0 pts
Top 5
54.8%
−5.4 pts
Top 10
71.8%
−3.4 pts
HHI
740
Broadly held−118
Quarterly Activity
vs Mar 31, 2026
New
68
Increased
87
Decreased
26
Sold Out
26
Unchanged
26
Holder count:
+42
Institutional value:
+419.2%
Shares held:
+48.8%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega STATE STREET CORP | +4,600,202 | 12,996,558 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | +4,415,441 | 13,396,997 | |
| Mega BlackRock, Inc. | +2,871,892 | 15,070,302 | |
| Mega CITADEL ADVISORS LLC | +1,722,459 | 6,605,100 | |
| Mega JANE STREET GROUP, LLC | +1,177,129 | 1,420,629 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega Invesco Ltd. | −322,738 | 375,342 | |
| Micro VISION FINANCIAL MARKETS LLC | −294,600 | 9,800 | |
| Mega Nuveen, LLC | −252,245 | 418,729 | |
| Mid SIMPLEX TRADING, LLC | −141,063 | 154,099 | |
| Mega MORGAN STANLEY | −100,032 | 1,236,261 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mid Anson Funds Management LP | 7,145,900 | $105,473,484 | |
| Mid PERCEPTIVE ADVISORS LLC | 1,500,000 | $22,140,000 | |
| Small Sio Capital Management, LLC | 1,230,700 | $18,165,132 | |
| Large LMR Partners LLP | 450,000 | $6,642,000 | |
| Large Jefferies Financial Group Inc. | 400,559 | $5,912,250 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Large MARSHALL WACE, LLP | 2,037,162 | $8,617,194 | |
| Mega TWO SIGMA INVESTMENTS, LP | 403,165 | $1,705,387 | |
| Mid Virtu Financial LLC | 221,829 | $938,336 | |
| Mid Tema ETFs LLC | 90,007 | $380,729 | |
| Small EntryPoint Capital, LLC | 48,224 | $203,987 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. | $222,437,653 | 14.54% | 15,070,302 | Shares | 2026-08-07 | |
| Mega STATE STREET CORP | $191,829,196 | 12.54% | 12,996,558 | Shares | 2026-08-07 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $121,417,309 | 7.93% | 8,226,105 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $105,640,272 | 6.90% | 7,157,200 | Call | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $72,090,422 | 4.71% | 4,884,175 | Shares | 2026-08-12 | |
| Mid Anson Funds Management LP | $66,420,000 | 4.34% | 4,500,000 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC | $64,157,292 | 4.19% | 4,346,700 | Call | 2026-09-02 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $61,832,592 | 4.04% | 4,189,200 | Put | 2026-08-14 | |
| Large JONES FINANCIAL COMPANIES LLLP | $34,015,320 | 2.22% | 2,304,561 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC | $33,333,984 | 2.18% | 2,258,400 | Put | 2026-09-02 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | $31,897,821 | 2.08% | 2,161,099 | Shares | 2026-08-13 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $30,266,811 | 1.98% | 2,050,597 | Shares | 2026-08-14 | |
| Mid Anson Funds Management LP | $27,245,484 | 1.78% | 1,845,900 | Put | 2026-08-13 | |
| Mega NORTHERN TRUST CORP Bank | $23,910,134 | 1.56% | 1,619,928 | Shares | 2026-08-13 | |
| Mid PERCEPTIVE ADVISORS LLC | $22,140,000 | 1.45% | 1,500,000 | Put | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $19,707,050 | 1.29% | 1,335,166 | Shares | 2026-08-13 | |
| Mega UBS Group AG | $18,490,692 | 1.21% | 1,252,757 | Shares | 2026-08-13 | |
| Mega MORGAN STANLEY | $18,247,210 | 1.19% | 1,236,261 | Shares | 2026-08-13 | |
| Small DAGCO, INC. | $18,190,711 | 1.19% | 1,232,433 | Shares | 2026-07-10 | |
| Small Sio Capital Management, LLC | $18,165,132 | 1.19% | 1,230,700 | Put | 2026-08-14 | |
| Mega BNP PARIBAS ARBITRAGE, SA | $15,823,044 | 1.03% | 1,072,022 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC | $13,372,560 | 0.87% | 906,000 | Put | 2026-08-14 | |
| Mega BARCLAYS PLC | $11,831,616 | 0.77% | 801,600 | Put | 2026-08-14 | |
| Mid Anson Funds Management LP | $11,808,000 | 0.77% | 800,000 | Call | 2026-08-13 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $11,630,126 | 0.76% | 787,949 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $11,058,192 | 0.72% | 749,200 | Call | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP | $8,816,278 | 0.58% | 597,309 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC | $8,635,115 | 0.56% | 585,035 | Shares | 2026-08-14 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $8,339,518 | 0.54% | 565,008 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $7,823,166 | 0.51% | 530,025 | Shares | 2026-08-06 | |
| Mega JANE STREET GROUP, LLC | $7,504,411 | 0.49% | 508,429 | Shares | 2026-08-14 | |
| Large Balyasny Asset Management L.P. | $7,380,000 | 0.48% | 500,000 | Put | 2026-08-14 | |
| Large LMR Partners LLP | $6,642,000 | 0.43% | 450,000 | Put | 2026-08-14 | |
| Large NOMURA HOLDINGS INC | $6,273,000 | 0.41% | 425,000 | Call | 2026-08-14 | |
| Mega Nuveen, LLC | $6,180,439 | 0.40% | 418,729 | Shares | 2026-08-11 | |
| Small DIADEMA PARTNERS LP | $5,904,000 | 0.39% | 400,000 | Call | 2026-08-14 | |
| Micro Opus Capital Group, LLC | $5,691,515 | 0.37% | 385,604 | Shares | 2026-07-31 | |
| Mega Invesco Ltd. | $5,540,045 | 0.36% | 375,342 | Shares | 2026-08-14 | |
| Mega Swiss National Bank Bank | $5,319,504 | 0.35% | 360,400 | Shares | 2026-08-11 | |
| Mid XTX Topco Ltd | $5,300,168 | 0.35% | 359,090 | Shares | 2026-08-14 | |
| Small Ikarian Capital, LLC | $5,235,372 | 0.34% | 354,700 | Put | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN | $4,853,367 | 0.32% | 328,819 | Shares | 2026-08-14 | |
| Mega CITIGROUP INC | $4,820,482 | 0.32% | 326,591 | Shares | 2026-08-03 | |
| Large RENAISSANCE TECHNOLOGIES LLC | $4,580,972 | 0.30% | 310,364 | Shares | 2026-08-13 | |
| Small Everhart Financial Group, Inc. | $4,251,145 | 0.28% | 288,018 | Shares | 2026-07-09 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $4,035,426 | 0.26% | 273,403 | Shares | 2026-08-13 | |
| Large Rafferty Asset Management, LLC | $3,540,805 | 0.23% | 239,892 | Shares | 2026-08-14 | |
| Mega ALLIANCEBERNSTEIN L.P. | $3,484,245 | 0.23% | 236,060 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS | $3,400,733 | 0.22% | 230,402 | Shares | 2026-08-12 | |
| Large Walleye Capital LLC | $3,377,088 | 0.22% | 228,800 | Put | 2026-08-03 | |
| Large TUDOR INVESTMENT CORP ET AL | $3,087,792 | 0.20% | 209,200 | Put | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension | $2,987,040 | 0.20% | 202,374 | Shares | 2026-08-24 | |
| Mid BOOTHBAY FUND MANAGEMENT, LLC | $2,982,996 | 0.19% | 202,100 | Put | 2026-08-14 | |
| Large Jefferies Financial Group Inc. | $2,958,774 | 0.19% | 200,459 | Shares | 2026-08-17 | |
| Large Jefferies Financial Group Inc. | $2,953,476 | 0.19% | 200,100 | Put | 2026-08-17 | |
| Large Mariner, LLC | $2,925,609 | 0.19% | 198,212 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC | $2,895,912 | 0.19% | 196,200 | Call | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Bank | $2,806,288 | 0.18% | 190,128 | Shares | 2026-08-07 | |
| Large ALPS ADVISORS INC | $2,776,459 | 0.18% | 188,107 | Shares | 2026-07-29 | |
| Mega Legal & General Group Plc | $2,476,727 | 0.16% | 167,800 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $2,405,880 | 0.16% | 163,000 | Put | 2026-08-14 | |
| Mega LPL Financial LLC | $2,297,585 | 0.15% | 155,663 | Shares | 2026-08-07 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $2,288,774 | 0.15% | 155,066 | Shares | 2026-08-14 | |
| Mid SIMPLEX TRADING, LLC | $2,274,501 | 0.15% | 154,099 | Shares | 2026-08-12 | |
| Large Vontobel Holding Ltd. | $2,166,207 | 0.14% | 146,762 | Shares | 2026-08-03 | |
| Large TUDOR INVESTMENT CORP ET AL | $2,069,352 | 0.14% | 140,200 | Call | 2026-08-14 | |
| Mega Vanguard Global Advisers, LLC | $1,918,873 | 0.13% | 130,005 | Shares | 2026-08-13 | |
| Large Tidal Investments LLC | $1,900,512 | 0.12% | 128,761 | Shares | 2026-08-13 | |
| Mega VANGUARD ASSET MANAGEMENT, Ltd | $1,859,597 | 0.12% | 125,989 | Shares | 2026-08-13 | |
| Large Caption Management, LLC | $1,845,000 | 0.12% | 125,000 | Put | 2026-08-14 | |
| Mid PROFUND ADVISORS LLC | $1,780,159 | 0.12% | 120,607 | Shares | 2026-08-11 | |
| Mega FRANKLIN RESOURCES INC | $1,758,742 | 0.11% | 119,156 | Shares | 2026-08-13 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund | $1,694,078 | 0.11% | 114,775 | Shares | 2026-08-14 | |
| Large MetLife Investment Management, LLC | $1,624,810 | 0.11% | 110,082 | Shares | 2026-08-14 | |
| Large Daiwa Securities Group Inc. Broker-Dealer | $1,589,652 | 0.10% | 107,700 | Put | 2026-07-31 | |
| Large Daiwa Securities Group Inc. Broker-Dealer | $1,512,900 | 0.10% | 102,500 | Shares | 2026-07-31 | |
| Mega JPMORGAN CHASE & CO | $1,477,991 | 0.10% | 100,135 | Shares | 2026-08-12 | |
| Small DIADEMA PARTNERS LP | $1,476,000 | 0.10% | 100,000 | Put | 2026-08-14 | |
| Mid HIGHBRIDGE CAPITAL MANAGEMENT LLC | $1,467,144 | 0.10% | 99,400 | Shares | 2026-08-14 | |
| Mid GSA CAPITAL PARTNERS LLP | $1,423,292 | 0.09% | 96,429 | Shares | 2026-08-06 | |
| Large STATE OF WISCONSIN INVESTMENT BOARD | $1,405,299 | 0.09% | 95,210 | Shares | 2026-08-14 | |
| Small Harvest Investment Services, LLC | $1,394,554 | 0.09% | 94,482 | Shares | 2026-08-14 | |
| Mid ORBIMED ADVISORS LLC | $1,365,300 | 0.09% | 92,500 | Put | 2026-08-14 | |
| Large Zurcher Kantonalbank (Zurich Cantonalbank) Bank | $1,229,581 | 0.08% | 83,305 | Shares | 2026-08-12 | |
| Mega Jupiter Topco LLC | $1,174,896 | 0.08% | 79,600 | Shares | 2026-08-14 | |
| Large Gotham Asset Management, LLC | $1,097,317 | 0.07% | 74,344 | Shares | 2026-08-14 | |
| Small FULCRUM WEALTH ADVISORS, LLC | $1,081,214 | 0.07% | 73,253 | Shares | 2026-07-21 | |
| Mega Russell Investments Group, Ltd. | $1,051,279 | 0.07% | 71,225 | Shares | 2026-08-06 | |
| Large Creative Planning | $1,042,690 | 0.07% | 70,643 | Shares | 2026-08-13 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND Pension | $978,588 | 0.06% | 66,300 | Shares | 2026-07-29 | |
| Large Verition Fund Management LLC | $916,596 | 0.06% | 62,100 | Put | 2026-08-14 | |
| Mega NATIONAL BANK OF CANADA /FI/ Bank | $892,138 | 0.06% | 60,443 | Shares | 2026-08-10 | |
| Large OSAIC HOLDINGS, INC. | $889,791 | 0.06% | 60,284 | Shares | 2026-08-14 | |
| Large FIFTH THIRD BANCORP Bank | $888,404 | 0.06% | 60,190 | Shares | 2026-08-05 | |
| Mega AQR CAPITAL MANAGEMENT LLC | $857,850 | 0.06% | 58,120 | Shares | 2026-08-14 | |
| Large State of New Jersey Common Pension Fund D Pension | $857,068 | 0.06% | 58,067 | Shares | 2026-08-04 | |
| Large Verition Fund Management LLC | $832,464 | 0.05% | 56,400 | Call | 2026-08-14 | |
| Large Police & Firemen's Retirement System of New Jersey Pension | $821,630 | 0.05% | 55,666 | Shares | 2026-07-23 | |
| Large ARIZONA STATE RETIREMENT SYSTEM Pension | $731,387 | 0.05% | 49,552 | Shares | 2026-08-07 | |
| Large Caption Management, LLC | $728,745 | 0.05% | 49,373 | Shares | 2026-08-14 |
Key facts
CIK
1390478
CUSIP
81642T209
13F (30d)
121 filings
121 filers
Visit website
Investor relations