Company · Ownership research

SELLAS Life Sciences Group, Inc. SLS

CIK 0001390478 · CUSIP 81642T209

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 81642T209 (SLS), not CUSIP 81642T959 (SLS), CUSIP 81642T909 (SLS), and does not merge CUSIPs.

This page lists the top 20 of 112 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	VANGUARD GROUP INC CIK 102909 · View history	$31.92M 8,467,400 shares	0.00%	+1.63M(+23.80%)Added	SEC filing ↗ Jan 29, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$28.43M 7,541,054 shares	0.00%	+1.85M(+32.60%)Added	SEC filing ↗ Feb 12, 2026	▾
03	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$11.60M 3,077,337 shares	0.00%	+812.95K(+35.90%)Added	SEC filing ↗ Feb 9, 2026	▾
04	STATE STREET CORP CIK 93751 · View history	$8.25M 2,188,171 shares	0.00%	+827.26K(+60.80%)Added	SEC filing ↗ Feb 13, 2026	▾
05	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$5.23M 1,387,849 shares	0.00%	+1.07M(+341.00%)Added	SEC filing ↗ Feb 17, 2026	▾
06	MARSHALL WACE, LLP CIK 1318757 · View history	$5.05M 1,340,668 shares	0.00%	-1.02M(-43.10%)Reduced	SEC filing ↗ Feb 13, 2026	▾
07	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$4.08M 1,082,207 shares	0.01%	+936.35K(+642.00%)Added	SEC filing ↗ Feb 17, 2026	▾
08	Nuveen, LLC CIK 1871926 · View history	$3.86M 1,023,961 shares	0.00%	+26.05K(+2.60%)Added	SEC filing ↗ Feb 12, 2026	▾
09	NORTHERN TRUST CORP CIK 73124 · View history	$3.51M 930,750 shares	0.00%	+199.57K(+27.30%)Added	SEC filing ↗ Feb 17, 2026	▾
10	MORGAN STANLEY CIK 895421 · Amended · View history	$3.36M 890,929 shares	0.00%	-163.86K(-15.50%)Reduced	SEC filing ↗ May 27, 2026	▾
11	DAGCO, INC. CIK 1767343 · View history	$2.18M 577,540 shares	0.50%	+577.54KNew	SEC filing ↗ Jan 8, 2026	▾
12	BARCLAYS PLC CIK 312069 · View history	$1.93M 511,034 shares	0.00%	+328.35K(+179.70%)Added	SEC filing ↗ Feb 13, 2026	▾
13	Clear Street Group Inc. CIK 1881567 · View history	$1.89M 500,000 shares	0.01%	+500.00KNew	SEC filing ↗ Feb 13, 2026	▾
14	Everhart Financial Group, Inc. CIK 1852858 · View history	$1.76M 466,216 shares	0.16%	+135.07K(+40.80%)Added	SEC filing ↗ Jan 7, 2026	▾
15	JONES FINANCIAL COMPANIES LLLP CIK 815917 · View history	$1.62M 429,243 shares	0.00%	+428.87K(+114,670.90%)Added	SEC filing ↗ Feb 17, 2026	▾
16	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$1.55M 411,654 shares	0.00%	+392.39K(+2,036.80%)Added	SEC filing ↗ Mar 25, 2026	▾
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$1.54M 408,401 shares	0.00%	+114.30K(+38.90%)Added	SEC filing ↗ Feb 13, 2026	▾
18	SUSQUEHANNA INTERNATIONAL GROUP, LLP CIK 1446194 · View history	$1.32M 349,755 shares	0.00%	-513.82K(-59.50%)Reduced	SEC filing ↗ Feb 17, 2026	▾
19	GSA CAPITAL PARTNERS LLP CIK 1362033 · View history	$1.30M 345,052 shares	0.11%	-173.94K(-33.50%)Reduced	SEC filing ↗ Feb 6, 2026	▾
20	Opus Capital Group, LLC CIK 1330325 · View history	$1.20M 317,100 shares	0.13%	+67.10K(+26.80%)Added	SEC filing ↗ Jan 30, 2026	▾

Showing 20 / 112 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

112

Cancelled or null records excluded

Disclosed shares

35,457,611

Not deduplicated across managers

Disclosed value

$133.73M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

SELLAS Life Sciences Group, Inc. · Q4 2025

Explore all 112 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.