SELLAS Life Sciences Group Ownership | Who Owns SELLAS Life Sciences Group?

SELLAS Life Sciences Group Ownership Summary

SELLAS Life Sciences Group is owned by 33.39% institutional investors, 0.23% insiders, and 66.38% retail investors. Vanguard group is the largest institutional shareholder, holding 6.94% of SLS shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 3.74% of its assets in SELLAS Life Sciences Group shares.

SLS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	SELLAS Life Sciences Group	33.39%	0.23%	66.38%
Sector	Healthcare Stocks	42.50%	10.81%	46.69%
Industry	Biotech Stocks	45.24%	10.75%	44.01%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	6.84M	6.94%	$11.01M
Anson funds management lp	6.03M	6.12%	$9.71M
Blackrock funding, inc. /de	5.69M	5.77%	$9.16M
Alyeska investment group	1.48M	3.30%	$1.76M
Marshall wace, llp	2.36M	2.39%	$3.80M
Geode capital management	2.26M	2.30%	$3.65M
State street	1.36M	1.38%	$2.19M
Morgan stanley	1.05M	1.07%	$1.70M
Nuveen	997.91K	1.01%	$1.61M
Blackrock	430.37K	0.96%	$512.14K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Anson funds management lp	6.03M	0.88%	$9.71M
Gsa capital partners llp	519.00K	0.07%	$836.00K
Instrumental wealth	44.91K	0.06%	$85.79K
Stoneridge investment partners	53.71K	0.06%	$86.00K
Everhart financial group	331.15K	0.05%	$533.15K
Opus capital group	250.00K	0.05%	$403.00K
Genesee capital advisors	30.00K	0.02%	$48.30K
Grange capital	13.50K	0.02%	$21.74K
Northstar asset management	40.32K	0.01%	$64.92K
Elco management	14.01K	0.01%	$22.55K

Top Buyers

Holder	Shares	% Assets	Change
Anson funds management lp	6.03M	0.88%	5.76M
Blackrock funding, inc. /de	5.69M	0.00%	1.10M
Alyeska investment group	1.48M	0.01%	479.07K
Everhart financial group	331.15K	0.05%	331.15K
Renaissance	291.82K	0.00%	291.82K

Top Sellers

Holder	Shares	% Assets	Change
Goldman sachs group	19.27K	-	-446.24K
Marshall wace, llp	2.36M	0.00%	-357.49K
Ubs group	84.99K	-	-224.70K
Diametric capital, lp	-	-	-160.19K
Xtx topco	-	-	-76.90K

New Positions

Holder	Shares	% Assets	Change	Value
Everhart financial group	331.15K	0.05%	331.15K	$533.15K
Stoneridge investment partners	53.71K	0.06%	53.71K	$86.00K
Instrumental wealth	44.91K	0.06%	44.91K	$85.79K
Northstar asset management	40.32K	0.01%	40.32K	$64.92K
Tyche wealth partners	37.50K	0.01%	37.50K	$60.38K

Sold Out

Holder	Change
Qube research	-2.00
Allworth financial lp	-150.00
Quantbot technologies lp	-389.00
Avion wealth	-573.00
Raymond james financial	-2.65K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	98	25.64%	32,906,671	31.20%	33	5.16%	53	-13.11%	17	183.33%
Jun 30, 2025	85	77.08%	26,765,779	87.33%	27	10.25%	64	88.24%	8	60.00%
Mar 31, 2025	48	37.14%	14,287,718	110.42%	16	16.45%	34	88.89%	6	20.00%
Dec 31, 2024	35	-	6,790,160	26.08%	9	15.98%	18	-10.00%	5	-
Sep 30, 2024	35	-	5,385,570	32.75%	7	9.63%	20	-16.67%	5	150.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	3.76M	3.74%	-516.15K
iShares Russell 2000 ETF	2.32M	2.20%	-
Vanguard US Total Market Shares ETF	1.69M	1.86%	-
Vanguard Institutional Extnd Mkt Idx Tr	1.09M	1.09%	-544.32K
Fidelity Small Cap Index	957.42K	0.91%	957.42K
Nuveen Equity Index R6	847.46K	0.80%	-
iShares Russell 2000 Growth ETF	840.19K	0.80%	-
CREF Stock R3	805.63K	0.77%	805.63K
Fidelity Extended Market Index	546.34K	0.52%	29.24K
Vanguard Russell 2000 ETF	455.31K	0.45%	-30.52K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 19, 2025	Kalin Katherine Bach	-	Buy	$100.81K
Jun 12, 2025	VAN NOSTRAND ROBERT L	-	Buy	$14.80K
May 30, 2025	Wasman Jane	-	Buy	$33.80K
May 22, 2025	Kalin Katherine Bach	-	Buy	$36.00K
Dec 05, 2022	Stergiou Angelos M.	President and CEO	Sell	$16.94K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	1	-
2025 Q2	3	-
2025 Q1	-	-
2024 Q4	-	-
2023 Q4	-	-

SLS Ownership FAQ

Who Owns SELLAS Life Sciences Group?

SELLAS Life Sciences Group shareholders are primarily institutional investors at 33.39%, followed by 0.23% insiders and 66.38% retail investors. The average institutional ownership in SELLAS Life Sciences Group's industry, Biotech Stocks , is 45.24%, which SELLAS Life Sciences Group falls below.

Who owns the most shares of SELLAS Life Sciences Group?

SELLAS Life Sciences Group’s largest shareholders are Vanguard group (6.84M shares, 6.94%), Anson funds management lp (6.03M shares, 6.12%), and Blackrock funding, inc. /de (5.69M shares, 5.77%). Together, they hold 18.83% of SELLAS Life Sciences Group’s total shares outstanding.

Does Blackrock own SELLAS Life Sciences Group?

Yes, BlackRock owns 0.96% of SELLAS Life Sciences Group, totaling 430.37K shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 512.14K$. In the last quarter, BlackRock increased its holdings by 152.15K shares, a 54.69% change.

Who is SELLAS Life Sciences Group’s biggest shareholder by percentage of total assets invested?

Anson funds management lp is SELLAS Life Sciences Group’s biggest shareholder by percentage of total assets invested, with 0.88% of its assets in 6.03M SELLAS Life Sciences Group shares, valued at 9.71M$.

Who is the top mutual fund holder of SELLAS Life Sciences Group shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of SELLAS Life Sciences Group shares, with 3.74% of its total shares outstanding invested in 3.76M SELLAS Life Sciences Group shares.

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