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

SELLAS Life Sciences Group Ownership Summary

SELLAS Life Sciences Group is owned by 16.28% institutional investors, 0.29% insiders, and 83.43% retail investors. Vanguard group is the largest institutional shareholder, holding 3.36% of SLS shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 1.86% of its assets in SELLAS Life Sciences Group shares.

SLS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	SELLAS Life Sciences Group	16.28%	0.29%	83.43%
Sector	Healthcare Stocks	279.18%	10.62%	-189.80%
Industry	Biotech Stocks	63.96%	10.74%	25.30%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	2.29M	3.36%	$2.38M
Alyeska investment group	1.48M	3.30%	$1.76M
Anson funds management lp	1.19M	1.75%	$1.24M
Geode capital management	733.55K	1.07%	$763.17K
Blackrock	430.37K	0.96%	$512.14K
Brooklyn fi	594.92K	0.87%	$677.15K
Blackrock funding, inc. /de	444.21K	0.65%	$461.98K
Opus capital group	238.50K	0.35%	$248.00K
State street	227.73K	0.33%	$236.84K
Northern trust	100.84K	0.23%	$120.00K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Anson funds management lp	1.19M	0.13%	$1.24M
Opus capital group	238.50K	0.03%	$248.00K
Alyeska investment group	1.48M	0.01%	$1.76M
Prosperity financial group	11.50K	0.01%	$11.96K
Brooklyn fi	594.92K	0.00%	$677.15K
Virtu financial	41.16K	0.00%	$43.00K
Nemes rush group	10.00K	0.00%	$10.40K
Geode capital management	733.55K	0.00%	$763.17K
Mariner	50.61K	0.00%	$52.63K
Tower research capital llc (trc)	5.30K	0.00%	$5.52K

Top Buyers

Holder	Shares	% Assets	Change
Brooklyn fi	594.92K	0.00%	594.92K
Alyeska investment group	1.48M	0.01%	479.07K
Anson funds management lp	1.19M	0.13%	398.43K
Blackrock	430.37K	-	152.15K
Geode capital management	733.55K	0.00%	128.35K

Top Sellers

Holder	Shares	% Assets	Change
Diametric capital, lp	-	-	-160.19K
Renaissance	-	-	-92.94K
Prelude capital management	-	-	-58.34K
Xtx topco	-	-	-53.43K
Millennium management	-	-	-46.34K

New Positions

Holder	Shares	% Assets	Change	Value
Brooklyn fi	594.92K	0.00%	594.92K	$677.15K
Ubs group	127.82K	-	127.82K	$132.93K
Belvedere trading	12.70K	-	12.70K	$15.11K
Prosperity financial group	11.50K	0.01%	11.50K	$11.96K
Royal bank of canada	669.00	-	669.00	$1.00K

Sold Out

Holder	Change
Fmr	-1.00
Qube research	-2.00
Allworth financial lp	-150.00
Wells fargo & company/mn	-301.00
Jpmorgan chase	-5.79K

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Jun 30, 2024	35	6.06%	4,057,046	-47.43%	9	1.57%	24	60.00%	2	-66.67%
Mar 31, 2024	33	-	7,717,107	121.72%	24	15.94%	15	-25.00%	6	20.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	1.69M	1.86%	-
Vanguard Total Stock Mkt Idx Inv	1.71M	1.81%	-
Vanguard Institutional Extnd Mkt Idx Tr	1.03M	1.09%	-
Fidelity Extended Market Index	403.81K	0.43%	18.64K
BlackRock Extended Equity Market K	100.56K	0.16%	-43.00
Fidelity Total Market Index	144.65K	0.15%	26.06K
iShares Micro-Cap ETF	129.02K	0.13%	-
Extended Equity Market Fund K	99.50K	0.11%	305.00
NT Ext Equity Mkt Idx Fd - L	94.41K	0.10%	-
Fidelity Series Total Market Index	95.69K	0.10%	4.06K

Recent Insider Transactions

Date	Name	Role	Activity	Value
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
Dec 05, 2022	Burns John Thomas	Senior VP, Finance & CAO	Sell	$3.00K
Dec 05, 2022	WOOD BARBARA A	EVP, Gen. Counsel, Corp. Sec.	Sell	$5.58K

Insider Transactions Trends

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

SLS Ownership FAQ

Who Owns SELLAS Life Sciences Group?

SELLAS Life Sciences Group shareholders are primarily institutional investors at 16.28%, followed by 0.29% insiders and 83.43% retail investors. The average institutional ownership in SELLAS Life Sciences Group's industry, Biotech Stocks , is 63.96%, 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 (2.29M shares, 3.36%), Alyeska investment group (1.48M shares, 3.30%), and Anson funds management lp (1.19M shares, 1.75%). Together, they hold 8.41% 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 0.13% of its assets in 1.19M SELLAS Life Sciences Group shares, valued at 1.24M$.

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

Vanguard US Total Market Shares ETF is the top mutual fund holder of SELLAS Life Sciences Group shares, with 1.86% of its total shares outstanding invested in 1.69M SELLAS Life Sciences Group shares.

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