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

SELLAS Life Sciences Group Ownership Summary

SELLAS Life Sciences Group is owned by 27.50% institutional investors, 0.65% insiders, and 71.85% retail investors. Vanguard group is the largest institutional shareholder, holding 7.81% 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	27.50%	0.65%	71.85%
Sector	Healthcare Stocks	232.51%	10.72%	-143.22%
Industry	Biotech Stocks	384.55%	10.58%	-295.13%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	8.47M	7.81%	$31.92M
Blackrock funding, inc. /de	7.54M	6.96%	$28.43M
Anson funds management lp	6.03M	6.12%	$9.71M
Alyeska investment group	1.48M	3.30%	$1.76M
Geode capital management	3.08M	2.84%	$11.60M
Marshall wace, llp	2.36M	2.39%	$3.80M
State street	1.36M	1.38%	$2.19M
Blackrock	430.37K	0.96%	$512.14K
Nuveen	1.02M	0.94%	$3.86M
Morgan stanley	890.93K	0.82%	$3.36M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Anson funds management lp	6.03M	0.88%	$9.71M
Dagco	577.54K	0.50%	$2.18M
Caitong asset management	19.78K	0.20%	$74.56K
Everhart financial group	466.22K	0.16%	$1.76M
Stoneridge investment partners	61.33K	0.16%	$231.00K
Opus capital group	317.10K	0.13%	$1.20M
Gsa capital partners llp	345.05K	0.11%	$1.30M
Visionary horizons	36.00K	0.07%	$135.72K
Instrumental wealth	44.91K	0.06%	$85.79K
Grange capital	16.00K	0.06%	$60.32K

Top Buyers

Holder	Shares	% Assets	Change
Anson funds management lp	6.03M	0.88%	5.76M
Blackrock funding, inc. /de	7.54M	0.00%	1.85M
Vanguard group	8.47M	0.00%	1.63M
Geode capital management	3.08M	0.00%	812.95K
Dagco	577.54K	0.50%	577.54K

Top Sellers

Holder	Shares	% Assets	Change
Marshall wace, llp	2.36M	0.00%	-357.49K
Renaissance	-	-	-291.82K
Gsa capital partners llp	345.05K	0.11%	-173.94K
Morgan stanley	890.93K	0.00%	-163.86K
Diametric capital, lp	-	-	-160.19K

New Positions

Holder	Shares	% Assets	Change	Value
Dagco	577.54K	0.50%	577.54K	$2.18M
Instrumental wealth	44.91K	0.06%	44.91K	$85.79K
Pensionmark financial group	44.12K	0.00%	44.12K	$166.34K
Trustmark national bank trust department	36.51K	0.00%	36.51K	$58.78K
Visionary horizons	36.00K	0.07%	36.00K	$135.72K

Sold Out

Holder	Change
Qube research	-2.00
Allworth financial lp	-150.00
Quantbot technologies lp	-389.00
Srs capital advisors	-540.00
Raymond james financial	-2.65K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	86	-13.13%	29,809,793	-9.44%	27	2.47%	55	1.85%	14	-17.65%
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	-

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
2026 Q1	-	-
2025 Q4	1	-
2025 Q2	3	-
2025 Q1	-	-
2024 Q4	-	-

SLS Ownership FAQ

Who Owns SELLAS Life Sciences Group?

SELLAS Life Sciences Group shareholders are primarily institutional investors at 27.50%, followed by 0.65% insiders and 71.85% retail investors. The average institutional ownership in SELLAS Life Sciences Group's industry, Biotech Stocks , is 384.55%, 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 (8.47M shares, 7.81%), Blackrock funding, inc. /de (7.54M shares, 6.96%), and Anson funds management lp (6.03M shares, 6.12%). Together, they hold 20.89% 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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