SELLAS Life Sciences Group, Inc. (SLS) Institutional Ownership & Insider Trading

190 institutions reported holding SELLAS Life Sciences Group, Inc. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 1 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason

SLSSELLAS Life Sciences Group, Inc.Follow SLS — free

Biotechnology · Healthcare

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Market cap: 2.3B
P/E TTM: —
Dividend yield: —
52-week: —
Next earnings: 10 Nov, in 17 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

190 institutions held 36.4% of the shares. Across filers that reported both quarters, shares held changed +37.2%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	190	73	+37.2%	73	59	23	21
Mar 26	159	54	+62.2%	52	60	18	14
Dec 25	111	35	+7.3%	49	25	19	9
Sep 25	93	33	+23.1%	27	19	18	5
Jun 25	77	27	+87.3%	19	39	6	6
Mar 25	44	14	+130.7%	16	18	2	3
Dec 24	30	6	+14.8%	10	4	5	8
Sep 24	32	5	+36.5%	10	8	5	4

SELLAS Life Sciences Group, Inc. — questions

Who owns SELLAS Life Sciences Group, Inc. stock?: 190 institutions reported SELLAS Life Sciences Group, Inc. shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (7.5%), STATE STREET CORP (6.4%), VANGUARD CAPITAL MANAGEMENT LLC (4.1%).
Are SELLAS Life Sciences Group, Inc. insiders buying or selling?: 1 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from SELLAS Life Sciences Group, Inc.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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