SLS · SELLAS Life Sciences Group, Inc. · Shareholders & Ownership

$11.35 -0.79 (-6.51%) At close · Oct 22

Russell 2000 member Rebalance outlook locked

Market Cap

$2.45B

201.95M

Volume · Oct 22 6.51M Avg daily vol (3M) 6.5M

Every disclosed holder of SLS in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns SLS

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	196	73,899,285	36.59%	Yes
Insiders (Forms 3, 4, 5)	8	3,347,497	1.66%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	124,698,927	61.75%	Rest
Registered funds (N-PORT, not summed)	124	34,811,682	17.24%	No

Shares outstanding: 201,945,709, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of SLS

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	15,070,302	7.46%	+2,871,892	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	4,928,335	2.44%	+747,804	Jun 30, 2026	iShares Trust, not summed
1.2	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	1,742,114	0.86%	+339,877	Jun 30, 2026	iShares Trust, not summed
1.3	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	632,184	0.31%	+198,366	Jun 30, 2026	iShares Trust, not summed
1.4	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	343,271	0.17%	+63,974	Jun 30, 2026	Quantitative Master Series LLC, not summed
1.5	iShares Core S&P Total U.S. Stock Market ETF Fund S000004317 · Registered fund · Jun 30, 2026 iShares Trust, not summed	271,724	0.13%	+6,528	Jun 30, 2026	iShares Trust, not summed
2	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	12,996,558	6.44%	+4,600,202	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	STATE STREET CORP 13G CIK 93751 · Bank · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	12,996,558	6.44%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
2.2	State Street(R) SPDR(R) S&P(R) Biotech ETF Fund S000010018 · Registered fund · Jun 30, 2026 SPDR SERIES TRUST, not summed	8,654,720	4.29%	+3,964,910	Jun 30, 2026	SPDR SERIES TRUST, not summed
2.3	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	64,700	0.03%	+6,000	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
2.4	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	4,764	0.00%	+682	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
2.5	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	1,004	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
3	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	8,226,105	4.07%	+700,176	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	VANGUARD CAPITAL MANAGEMENT LLC 13G CIK 2100119 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	9,666,278	4.79%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
4	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	5,906,922	2.93%	+937,304	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
5	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,884,175	2.42%	+971,569	Jun 30, 2026	carried, not yet filed for the newest quarter
6	Anson Funds Management LP 13F CIK 1491072 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,500,000	2.23%	+4,500,000	Jun 30, 2026	carried, not yet filed for the newest quarter
7	JONES FINANCIAL COMPANIES LLLP 13F CIK 815917 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,304,561	1.14%	+629,484	Jun 30, 2026	carried, not yet filed for the newest quarter
8	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,161,099	1.07%	+698,293	Jun 30, 2026	carried, not yet filed for the newest quarter
9	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	2,134,837	1.06%	+234,610	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
10	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,050,597	1.02%	+1,653,541	Jun 30, 2026	carried, not yet filed for the newest quarter
11	Stergiou Angelos M. Insider CIK 1724253 · Jun 16, 2026 Director, President and CEO, issuer-wide	1,759,183	0.87%	+1,072,217	Jun 16, 2026	Director, President and CEO, issuer-wide
12	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,619,928	0.80%	+343,944	Jun 30, 2026	carried, not yet filed for the newest quarter
12.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	95,363	0.05%	+18,153	Jun 30, 2026	Northern Funds, not summed
12.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	17,526	0.01%	—	Jun 30, 2026	Northern Funds, not summed
13	DAGCO, INC. 13F CIK 1767343 · Registered investment adviser · Sep 30, 2026	1,336,449	0.66%	+104,016	Sep 30, 2026
14	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,335,166	0.66%	+132,327	Jun 30, 2026	carried, not yet filed for the newest quarter
15	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,252,757	0.62%	+507,338	Jun 30, 2026	carried, not yet filed for the newest quarter
16	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,236,261	0.61%	-100,032	Jun 30, 2026	carried, not yet filed for the newest quarter
17	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	1,072,022	0.53%	+1,025,006	Jun 30, 2026	carried, not yet filed for the newest quarter
18	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	883,026	0.44%	+268,819	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
19	BANK OF AMERICA CORP /DE/ 13F CIK 70858 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	787,949	0.39%	+146,266	Jun 30, 2026	carried, not yet filed for the newest quarter
20	VANGUARD U.S. MOMENTUM FACTOR ETF Fund S000061302 · Registered fund · May 31, 2026 VANGUARD WELLINGTON FUND, not summed	604,612	0.30%	+159,282	May 31, 2026	VANGUARD WELLINGTON FUND, not summed
21	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	597,309	0.30%	+252,531	Jun 30, 2026	carried, not yet filed for the newest quarter
22	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	585,035	0.29%	+29,122	Jun 30, 2026	carried, not yet filed for the newest quarter
22.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	51,293	0.03%	—	May 31, 2026	Goldman Sachs ETF Trust, not summed
22.2	Goldman Sachs Small Cap Growth Insights Fund Fund S000014930 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	26,352	0.01%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
22.3	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	20,066	0.01%	+19,465	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
22.4	Goldman Sachs Small Cap Equity Insights Fund Fund S000009329 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	17,883	0.01%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
22.5	Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund Fund S000009355 · Registered fund · Jun 30, 2026 Goldman Sachs Variable Insurance Trust, not summed	2,835	0.00%	—	Jun 30, 2026	Goldman Sachs Variable Insurance Trust, not summed
23	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	565,008	0.28%	+84,404	Jun 30, 2026	carried, not yet filed for the newest quarter
23.1	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	458,889	0.23%	+81,352	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
23.2	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	112,901	0.06%	+10,000	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
24	CICIC DRAGAN Insider CIK 1565795 · Jan 7, 2026 SVP, Chief Development Officer, issuer-wide	557,805	0.28%	+300,000	Jan 7, 2026	SVP, Chief Development Officer, issuer-wide
25	Burns John Thomas Insider CIK 1568734 · Jan 7, 2026 CFO, issuer-wide	554,327	0.27%	+300,000	Jan 7, 2026	CFO, issuer-wide
26	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	530,025	0.26%	+51,659	Jun 30, 2026	carried, not yet filed for the newest quarter
27	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	508,429	0.25%	+508,429	Jun 30, 2026	carried, not yet filed for the newest quarter
28	Nuveen, LLC 13F CIK 1871926 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	418,729	0.21%	-252,245	Jun 30, 2026	carried, not yet filed for the newest quarter
28.1	Nuveen Small Cap Blend Index Fund Fund S000005367 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	239,603	0.12%	+33,792	Jul 31, 2026	TIAA-CREF Funds, not summed
28.2	Nuveen Equity Index Fund Fund S000005360 · Registered fund · Jul 31, 2026 TIAA-CREF Funds, not summed	146,852	0.07%	+69,285	Jul 31, 2026	TIAA-CREF Funds, not summed
28.3	TIAA Separate Account VA-1 - Stock Index Account Fund S000005098 · Registered fund · Jun 30, 2026 TIAA Separate Account VA-1, not summed	3,317	0.00%	0	Jun 30, 2026	TIAA Separate Account VA-1, not summed
28.4	Nuveen Life Stock Index Fund Fund S000005094 · Registered fund · Jun 30, 2026 TIAA-CREF Life Funds, not summed	2,376	0.00%	0	Jun 30, 2026	TIAA-CREF Life Funds, not summed
29	Opus Capital Group, LLC 13F CIK 1330325 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	385,604	0.19%	+39,152	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Invesco Ltd. 13F CIK 914208 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	375,342	0.19%	-322,738	Jun 30, 2026	carried, not yet filed for the newest quarter
30.1	Invesco Dorsey Wright SmallCap Momentum ETF Fund S000037586 · Registered fund · May 31, 2026 Invesco Exchange-Traded Fund Trust II, not summed	274,459	0.14%	—	May 31, 2026	Invesco Exchange-Traded Fund Trust II, not summed
31	Swiss National Bank 13F CIK 1582202 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	360,400	0.18%	+360,400	Jun 30, 2026	carried, not yet filed for the newest quarter
32	XTX Topco Ltd 13F CIK 1828301 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	359,090	0.18%	+359,090	Jun 30, 2026	carried, not yet filed for the newest quarter
33	WELLS FARGO & COMPANY/MN 13F CIK 72971 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	328,819	0.16%	+103,112	Jun 30, 2026	carried, not yet filed for the newest quarter
34	CITIGROUP INC 13F CIK 831001 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	326,591	0.16%	+300,945	Jun 30, 2026	carried, not yet filed for the newest quarter
35	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	310,364	0.15%	+310,364	Jun 30, 2026	carried, not yet filed for the newest quarter
36	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 13F CIK 861177 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	273,403	0.14%	+273,403	Jun 30, 2026	carried, not yet filed for the newest quarter
37	Everhart Financial Group, Inc. 13F CIK 1852858 · Registered investment adviser · Sep 30, 2026	240,213	0.12%	-47,805	Sep 30, 2026
38	Rafferty Asset Management, LLC 13F CIK 1389426 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	239,892	0.12%	-9,536	Jun 30, 2026	carried, not yet filed for the newest quarter
38.1	Direxion Daily S&P Biotech Bull 3X Shares Fund S000049373 · Registered fund · Jul 31, 2026 Direxion Shares ETF Trust, not summed	293,250	0.15%	+24,785	Jul 31, 2026	Direxion Shares ETF Trust, not summed
39	ALLIANCEBERNSTEIN L.P. 13F CIK 1109448 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	236,060	0.12%	+72,120	Jun 30, 2026	carried, not yet filed for the newest quarter
40	RHUMBLINE ADVISERS 13F CIK 1115418 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	230,402	0.11%	+36,204	Jun 30, 2026	carried, not yet filed for the newest quarter
41	EQ/2000 Managed Volatility Portfolio Fund S000025800 · Registered fund · Jun 30, 2026 EQ Advisors Trust, not summed	205,355	0.10%	+26,231	Jun 30, 2026	EQ Advisors Trust, not summed
42	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 13F CIK 1081019 · Pension or benefit plan · Jun 30, 2026 carried, not yet filed for the newest quarter	202,374	0.10%	+193,037	Jun 30, 2026	carried, not yet filed for the newest quarter
43	Jefferies Financial Group Inc. 13F CIK 96223 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	200,459	0.10%	+200,459	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Mariner, LLC 13F CIK 1373442 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	198,212	0.10%	+24,642	Jun 30, 2026	carried, not yet filed for the newest quarter
45	DEUTSCHE BANK AG\ 13F CIK 948046 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	190,128	0.09%	+52,482	Jun 30, 2026	carried, not yet filed for the newest quarter
45.1	DWS Small Cap Index VIP Fund S000006223 · Registered fund · Jun 30, 2026 DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed	29,188	0.01%	+5,100	Jun 30, 2026	DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed
46	ALPS ADVISORS INC 13F CIK 1376113 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	188,107	0.09%	+188,107	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Legal & General Group Plc 13F CIK 764068 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	167,800	0.08%	+152,658	Jun 30, 2026	carried, not yet filed for the newest quarter
48	VANGUARD RUSSELL 2000 GROWTH INDEX FUND Fund S000030005 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	161,491	0.08%	+48,044	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
49	LPL Financial LLC 13F CIK 1403438 · Broker-dealer · Jun 30, 2026 carried, not yet filed for the newest quarter	155,663	0.08%	+18,455	Jun 30, 2026	carried, not yet filed for the newest quarter
50	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	155,066	0.08%	+32,946	Jun 30, 2026	carried, not yet filed for the newest quarter
50.1	T. Rowe Price Small-Cap Index Fund Fund S000051327 · Registered fund · Jun 30, 2026 T. ROWE PRICE INDEX TRUST, INC., not summed	28,462	0.01%	+8,453	Jun 30, 2026	T. ROWE PRICE INDEX TRUST, INC., not summed

8 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 259 holders

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Key facts CIK 1390478 CUSIP 81642T209 13F (30d) 33 filings 33 filers Visit website Investor relations