SLS · NASDAQ · Biotechnology

SELLAS Life Sciences Group (SLS)

Develops licensed oncology candidates GPS and SLS009 for cancer indications.

$11.88
vs last close−0.14 (−1.16%)

13F · 13D/G · Form 4

Institutions≈ 39.26%73.04M shares
234 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail
Insiders1.95%3.62M shares
8 holders · as of Jun 18, 2026
Other≈ 58.79%109.37M shares
remainder

186.03M company shares as of Sep 18, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

Two share counts disagree (201.95M in the company's Sep 23, 2026 report, 186.03M elsewhere); stakes use the report.

This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.

13F · 13D/G · Form 4

HolderStakeSharesDate
BlackRock, Inc.Institution
8.10%15.07Mas of Jun 30, 2026
State Street CorpInstitution
6.99%13.00Mas of Jun 30, 2026
Vanguard Capital Management LLCInstitution
4.42%8.23Mas of Jun 30, 2026
Geode Capital Management, LLCInstitution
2.63%4.88Mas of Jun 30, 2026
Anson Funds Management LPInstitution
2.42%4.50Mas of Jun 30, 2026
Jones Financial Companies LLLPInstitution
1.24%2.30Mas of Jun 30, 2026
Vanguard Portfolio Management LLCInstitution
1.16%2.16Mas of Jun 30, 2026
Susquehanna International Group, LLPInstitution
1.10%2.05Mas of Jun 30, 2026
Angelos M. StergiouInsiderdirector, officer: President and CEO
1.06%1.76M · 217,421filed Jun 18, 2026
Northern Trust CorpInstitution
0.87%1.62Mas of Jun 30, 2026
Vanguard Fiduciary Trust CoInstitution
0.72%1.34Mas of Jun 30, 2026
UBS Group AGInstitution
0.67%1.25Mas of Jun 30, 2026
Morgan StanleyInstitution
0.66%1.24Mas of Jun 30, 2026
Dagco, Inc.Institution
0.66%1.23Mas of Jun 30, 2026
BNP Paribas Arbitrage, SNCInstitution
0.58%1.07Mas of Jun 30, 2026
Bank of America Corp /DE/Institution
0.42%787,949as of Jun 30, 2026
John Thomas BurnsInsiderofficer: CFO
0.33%554,327 · 54,927filed Jan 9, 2026
Wellington Management Group LLPInstitution
0.32%597,309as of Jun 30, 2026
Goldman Sachs Group IncInstitution
0.31%585,035as of Jun 30, 2026
Charles Schwab Investment Management IncInstitution
0.30%565,008as of Jun 30, 2026
Sixth Street Partners Management Company, L.P.Institution
0.30%565,008as of Jun 30, 2026
Dragan CicicInsiderofficer: SVP, Chief Development Officer
0.30%557,805filed Jan 9, 2026
Bank of New York Mellon CorpInstitution
0.28%530,025as of Jun 30, 2026
Jane Street Group, LLCInstitution
0.27%508,429as of Jun 30, 2026
Nuveen, LLCInstitution
0.23%418,729as of Jun 30, 2026

13F, as of Jun 30, 2026

234 holders · 73.04M shares · 69 new positions · 150 increased · 33 reduced · 25 closed

HolderShares% outstandingChg q/qFiled
BlackRock, Inc.15.07M8.10%+2.87MAug 7, 2026
State Street Corp13.00M6.99%+4.60MAug 7, 2026
Vanguard Capital Management LLC8.23M4.42%+700.2KAug 13, 2026
Geode Capital Management, LLC4.88M2.63%+971.6KAug 12, 2026
Anson Funds Management LP4.50M2.42%+4.50MnewAug 13, 2026
Jones Financial Companies LLLP2.30M1.24%+629.5KAug 14, 2026
Vanguard Portfolio Management LLC2.16M1.16%+698.3KAug 13, 2026
Susquehanna International Group, LLP2.05M1.10%+1.65MAug 14, 2026

13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
State Street Corporation7.00%13.00M13GAug 7, 2026
BlackRock, Inc.6.80%12.14M13GApr 24, 2026
Vanguard Capital Management5.19%9.67M13GJul 31, 2026

Form 4

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Nov 19, 2025
Katherine Bach Kalindirector
Purchase63,400$1.59104,400

House and Senate disclosures

Not reported.