SELLAS Life Sciences Group, Inc.

SLS

Exchange: Nasdaq
Industry: Pharmaceutical Preparations
SEC CIK: 0001390478

SEC filings (opens in a new tab)

No open-market purchases or sales by SELLAS Life Sciences Group, Inc. insiders were filed in the last 90 days; 193 institutions reported holding it in 13F filings for Q2 2026, worth $1.08B in total; no superinvestor holds it.

Q3 2025 vs. Q2 2025

How the institutions holding SELLAS Life Sciences Group, Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025 All holders in Q2 2025

13F holders of SLS: Q2 2025 compared with Q3 2025
Measure	Q2 2025	Of which not filed for Q3 2025	Q3 2025	Change
Holders	79	1	94	+16
Shares	26.8M	11.8K	32.9M	+6.16M (+23.0%)
Value	$58.7M	$25.8K	$53.1M	−$5.61M (−9.6%)

1 institution that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (21)

Institutions that held SELLAS Life Sciences Group, Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to SLS in Q3 2025
Institution	Shares	Value	% of portfolio
Everhart Financial Group, Inc.	331,150	$533.2K	0.05%
Renaissance Technologies LLC	291,822	$469.8K	0.00%
Stoneridge Investment Partners LLC	53,709	$86.0K	0.06%
Instrumental Wealth, LLC	44,914	$85.8K	0.06%
Northstar Asset Management LLC	40,320	$64.9K	0.01%
Tyche Wealth Partners LLC	37,500	$60.4K	0.01%
Trustmark National Bank Trust Department	36,511	$58.8K	0.00%
Genesee Capital Advisors, LLC	30,000	$48.3K	0.02%
Scissortail Wealth Management, LLC	27,322	$44.0K	0.01%
SEI Investments Co	26,581	$42.8K	0.00%
Kestra Advisory Services, LLC	26,400	$42.5K	0.00%
Cambridge Investment Research Advisors, Inc.	20,000	$32.0K	0.00%
Axxcess Wealth Management, LLC	16,000	$25.8K	0.00%
ELCO Management Co., LLC	14,009	$22.6K	0.01%
CIBC Bancorp USA Inc.	10,736	$17.3K	0.00%
Russell Investments Group, Ltd.	9,189	$14.8K	0.00%
Rockefeller Capital Management L.P.	5,000	$8.05K	0.00%
CWM, LLC	5,244	$8.00K	0.00%
The PNC Financial Services Group, Inc.	1,152	$1.85K	0.00%
FMR LLC	1,028	$1.66K	0.00%
SRS Capital Advisors, Inc.	540	$869	0.00%

Sold out (5)

Institutions that held SELLAS Life Sciences Group, Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of SLS in Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
XTX Topco Ltd	76,900	$168.4K
Atom Investors LP	54,624	$119.6K
Cubist Systematic Strategies, LLC	31,314	$68.6K
Raymond James Financial Inc	2,652	$5.81K
Quantbot Technologies LP	389	$852

Not filed for Q3 2025 yet (1)

Institutions that held SELLAS Life Sciences Group, Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding SLS in Q2 2025 that haven't filed for Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
CIBC World Markets Corp	11,759	$25.8K