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Equibles

SLS

SELLAS Life Sciences Group, Inc.

Company with tickers: SLS

CIK
1390478
CUSIP
81642T209
Shares Outstanding
196,632,574
13F Activity (30d)
96 filings 90 filers

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: 165
Total Value: $294,741,597
Total Shares: 69,678,886
Showing 1–100 of 176 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 165 13F filers · Δ vs Dec 31, 2025
Top Holder
17.5%
Jun 2023 → Mar 2026 · range 17.4% – 53.3%
−0.3 pts
Top 5
60.3%
Jun 2023 → Mar 2026 · range 58.0% – 93.5%
+2.2 pts
Top 10
75.2%
Jun 2023 → Mar 2026 · range 73.0% – 98.6%
+2.3 pts
HHI
857
Jun 2023 → Mar 2026 · range 857 – 3,355
Broadly held−28

Quarterly Activity

vs Dec 31, 2025
New
65
Increased
55
Decreased
23
Sold Out
19
Unchanged
22
Holder count: +46
Institutional value: +64.4%
Shares held: +46.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega STATE STREET CORP +6,208,185 8,396,356
Mega BlackRock, Inc. +4,657,356 12,198,410
Mega CITADEL ADVISORS LLC +2,892,341 4,882,641
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP +2,659,601 8,981,556
Large JONES FINANCIAL COMPANIES LLLP +1,245,834 1,675,077

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large TUDOR INVESTMENT CORP ET AL −988,900 314,400
Mid SIG BROKERAGE, LP −727,571 15,429
Mega TWO SIGMA INVESTMENTS, LP −679,042 403,165
Mega BARCLAYS PLC −678,622 32,412
Mega MILLENNIUM MANAGEMENT LLC −386,125 1,001,724

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 7,525,929 $31,834,679
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 1,462,806 $6,187,669
Mega VANGUARD FIDUCIARY TRUST CO 1,202,839 $5,088,008
Mega WELLINGTON MANAGEMENT GROUP LLP 344,778 $1,458,409
Micro VISION FINANCIAL MARKETS LLC 304,400 $1,287,612

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 8,467,400 $31,922,097
Large Clear Street Group Inc. 1,000,000 $3,770,000
Mid XTX Topco Ltd 118,440 $446,518
Large DANSKE BANK A/S 100,000 $377,000
Large TWO SIGMA ADVISERS, LP 76,554 $288,608
Filter: New 65 Increased 55 Reduced 23 Sold out 19 Unchanged 22
Showing 100 of 176
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $51,599,272 17.51% 12,198,410
Mega STATE STREET CORP $35,516,585 12.05% 8,396,356
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $32,249,943 10.94% 7,624,100
Mega VANGUARD CAPITAL MANAGEMENT LLC $31,834,679 10.80% 7,525,929
Mega CITADEL ADVISORS LLC $18,477,486 6.27% 4,368,200
Mega GEODE CAPITAL MANAGEMENT, LLC $16,550,322 5.62% 3,912,606
Large MARSHALL WACE, LLP $8,617,194 2.92% 2,037,162
Large JONES FINANCIAL COMPANIES LLLP $7,085,575 2.40% 1,675,077
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $6,187,669 2.10% 1,462,806
Mega MORGAN STANLEY $5,652,516 1.92% 1,336,293
Mega NORTHERN TRUST CORP Bank $5,397,411 1.83% 1,275,984
Mega VANGUARD FIDUCIARY TRUST CO Bank $5,088,008 1.73% 1,202,839
Micro DAGCO, INC. $4,351,739 1.48% 1,028,780
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $4,062,492 1.38% 960,400
Mega UBS Group AG $3,153,121 1.07% 745,419
Mega Invesco Ltd. $2,952,877 1.00% 698,080
Mega Nuveen, LLC $2,838,219 0.96% 670,974
Mega BANK OF AMERICA CORP /DE/ Bank $2,714,318 0.92% 641,683
Mega MILLENNIUM MANAGEMENT LLC $2,647,980 0.90% 626,000
Mega GOLDMAN SACHS GROUP INC $2,351,511 0.80% 555,913
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $2,032,954 0.69% 480,604
Mega Bank of New York Mellon Corp Bank $2,023,487 0.69% 478,366
Mega CITADEL ADVISORS LLC $1,902,654 0.65% 449,800
Large NOMURA HOLDINGS INC $1,847,241 0.63% 436,700
Mega TWO SIGMA INVESTMENTS, LP $1,705,387 0.58% 403,165
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,679,546 0.57% 397,056
Small Everhart Financial Group, Inc. $1,541,399 0.52% 364,397
Micro Opus Capital Group, LLC $1,465,491 0.50% 346,452
Mega WELLINGTON MANAGEMENT GROUP LLP $1,458,409 0.49% 344,778
Micro VISION FINANCIAL MARKETS LLC $1,287,612 0.44% 304,400
Small DIADEMA PARTNERS LP $1,269,000 0.43% 300,000
Mid SIMPLEX TRADING, LLC $1,248,535 0.42% 295,162
Large Rafferty Asset Management, LLC $1,055,080 0.36% 249,428
Mega JANE STREET GROUP, LLC $1,030,005 0.35% 243,500
Mega WELLS FARGO & COMPANY/MN $954,740 0.32% 225,707
Mid Virtu Financial LLC $938,336 0.32% 221,829
Mega MILLENNIUM MANAGEMENT LLC $914,526 0.31% 216,200
Mega RHUMBLINE ADVISERS $821,457 0.28% 194,198
Large Vontobel Holding Ltd. $736,667 0.25% 174,153
Large Mariner, LLC $734,201 0.25% 173,570
Mega ALLIANCEBERNSTEIN L.P. $693,466 0.24% 163,940
Mid GSA CAPITAL PARTNERS LLP $690,716 0.23% 163,290
Mega MILLENNIUM MANAGEMENT LLC $674,786 0.23% 159,524
Large TUDOR INVESTMENT CORP ET AL $671,724 0.23% 158,800
Large TUDOR INVESTMENT CORP ET AL $658,188 0.22% 155,600
Mega DEUTSCHE BANK AG\ Bank $582,241 0.20% 137,646
Mega LPL Financial LLC $580,389 0.20% 137,208
Mega Vanguard Global Advisers, LLC $541,905 0.18% 128,110
Mega PRICE T ROWE ASSOCIATES INC /MD/ $516,567 0.18% 122,120
Mid PROFUND ADVISORS LLC $472,888 0.16% 111,794
Micro FULCRUM WEALTH ADVISORS, LLC $462,131 0.16% 109,251
Large Verition Fund Management LLC $421,731 0.14% 99,700
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $415,762 0.14% 98,289
Large MetLife Investment Management, LLC $398,698 0.14% 94,255
Large Tidal Investments LLC $380,729 0.13% 90,007
Mid Tema ETFs LLC Mutual Fund $380,729 0.13% 90,007
Mid Engineers Gate Manager LP $350,159 0.12% 82,780
Mega JPMORGAN CHASE & CO $346,115 0.12% 81,824
Large Balyasny Asset Management L.P. $345,569 0.12% 81,695
Large Squarepoint Ops LLC $316,196 0.11% 74,751
Large Quantinno Capital Management LP $314,618 0.11% 74,378
Mega CITADEL ADVISORS LLC $273,431 0.09% 64,641
Small Caitong International Asset Management Co., Ltd $256,811 0.09% 60,712
Large Verition Fund Management LLC $255,069 0.09% 60,300
Large FIFTH THIRD BANCORP Bank $252,983 0.09% 59,807
Mega AQR CAPITAL MANAGEMENT LLC $228,376 0.08% 53,990
Mid INTECH INVESTMENT MANAGEMENT LLC $216,808 0.07% 51,255
Small NORTHSTAR ASSET MANAGEMENT Co $211,500 0.07% 50,000
Small EntryPoint Capital, LLC $203,987 0.07% 48,224
Large OSAIC HOLDINGS, INC. $199,960 0.07% 47,272
Large Police & Firemen's Retirement System of New Jersey Pension $199,186 0.07% 47,089
Mega BNP PARIBAS ARBITRAGE, SA $198,877 0.07% 47,016
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $193,272 0.07% 45,691
Micro INSTRUMENTAL WEALTH, LLC $189,986 0.06% 44,914
Large Creative Planning $171,615 0.06% 40,571
Large FARALLON CAPITAL MANAGEMENT LLC $169,200 0.06% 40,000
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $164,970 0.06% 39,000
Large COMMONWEALTH EQUITY SERVICES, LLC $162,728 0.06% 38,470
Micro Visionary Horizons, LLC $152,280 0.05% 36,000
Small OXFORD ASSET MANAGEMENT LLP $150,169 0.05% 35,501
Mid AXXCESS WEALTH MANAGEMENT, LLC $149,615 0.05% 35,370
Mid Magnetar Financial LLC $148,185 0.05% 35,032
Small Scientech Research LLC $144,226 0.05% 34,096
Small Accurate Wealth Management, LLC $137,944 0.05% 32,611
Mega BARCLAYS PLC $137,102 0.05% 32,412
Mid E Fund Management Co., Ltd. $132,627 0.04% 31,354
Micro Genesee Capital Advisors, LLC $126,900 0.04% 30,000
Large VOYA INVESTMENT MANAGEMENT LLC $123,778 0.04% 29,262
Large Kestra Advisory Services, LLC $123,304 0.04% 29,150
Large PRUDENTIAL FINANCIAL INC $121,358 0.04% 28,690
Small Scissortail Wealth Management, LLC $115,572 0.04% 27,322
Large SEI INVESTMENTS CO $112,437 0.04% 26,581
Mega CITIGROUP INC $108,481 0.04% 25,646
Small SJS Investment Consulting Inc. $105,750 0.04% 25,000
Micro Millington Financial Advisors, LLC $105,750 0.04% 25,000
Large ProShare Advisors LLC $105,390 0.04% 24,915
Mid World Investment Advisors $104,125 0.04% 24,616
Small Jaffetilchin Investment Partners, LLC $102,949 0.03% 24,338
Micro Financial Designs Corp $98,673 0.03% 23,327
Mid INDEPENDENT FINANCIAL GROUP, LLC $98,347 0.03% 23,250

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