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

SELLAS Life Sciences Group Ownership Summary

SELLAS Life Sciences Group is owned by 42.94% institutional investors, 0.92% insiders, and 56.14% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 8.74% of SLS shares. Vanguard MStar Total Stk Mkt Idx Invest is the top mutual fund, with 3.19% of its assets in SELLAS Life Sciences Group shares.

SLS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	SELLAS Life Sciences Group	42.94%	0.92%	56.14%
Sector	Healthcare Stocks	246.48%	12.12%	-158.60%
Industry	Biotech Stocks	384.82%	11.76%	-296.58%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	15.07M	8.74%	$222.44M
Vanguard group	8.47M	7.81%	$31.92M
State street	13.00M	7.54%	$191.83M
Vanguard capital management	8.23M	4.77%	$121.42M
Alyeska investment group	1.48M	3.30%	$1.76M
Geode capital management	4.88M	2.83%	$72.11M
Anson funds management lp	4.50M	2.61%	$66.42M
Jones financial companies lllp	2.30M	1.34%	$28.55M
Susquehanna group, llp	2.05M	1.19%	$30.27M
Blackrock	430.37K	0.96%	$512.14K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Anson funds management lp	4.50M	3.94%	$66.42M
Dagco	1.34M	2.85%	$16.45M
Fulcrum wealth advisors	85.45K	0.73%	$1.05M
Vision financial markets	57.00K	0.53%	$701.67K
Opus capital group	403.63K	0.49%	$4.97M
Instrumental wealth	44.91K	0.27%	$552.89K
Harvest investment services	94.48K	0.22%	$1.39M
Everhart financial group	240.21K	0.18%	$2.96M
Visionary horizons	36.00K	0.18%	$443.16K
Martin capital advisors, llp	23.08K	0.15%	$284.14K

Top Buyers

Holder	Shares	% Assets	Change
State street	13.00M	0.01%	4.60M
Anson funds management lp	4.50M	3.94%	4.50M
Blackrock funding, inc. /de	15.07M	0.00%	2.87M
Susquehanna group, llp	2.05M	0.00%	1.65M
Vanguard group	8.47M	0.00%	1.63M

Top Sellers

Holder	Shares	% Assets	Change
Marshall wace, llp	-	-	-2.04M
Clear street group	-	-	-500.00K
Two sigma investments, lp	-	-	-403.17K
Invesco	375.34K	0.00%	-322.74K
Nuveen	418.73K	0.00%	-252.25K

New Positions

Holder	Shares	% Assets	Change	Value
Anson funds management lp	4.50M	3.94%	4.50M	$66.42M
Sixth street partners management company	565.01K	0.00%	565.01K	$8.34M
Swiss national bank	360.40K	0.00%	360.40K	$5.32M
Renaissance	310.36K	0.01%	310.36K	$4.58M
Ubs asset management americas	273.40K	0.00%	273.40K	$4.04M

Sold Out

Holder	Change
Qube research	-2.00
Mai capital management	-2.00
Twin peaks wealth advisors	-40.00
Root financial partners	-60.00
Nvwm	-201.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	230	30.68%	74,066,468	37.26%	42	4.39%	149	24.17%	31	34.78%
Mar 31, 2026	107	-16.41%	30,123,036	-14.99%	27	2.58%	73	-15.12%	12	-29.41%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard MStar Total Stk Mkt Idx Invest	6.45M	3.19%	529.27K
Vanguard Total Stock Mkt Idx Inv	5.91M	3.00%	463.99K
Vanguard Morn Total Stk Mkt Idx Investor	5.91M	3.00%	463.99K
State Street® SPDR® S&P® Biotech ETF	5.92M	2.93%	-47.96K
iShares Russell 2000 ETF	5.11M	2.53%	-20.79K
Vanguard US Total Market Shares ETF	1.69M	1.86%	-
Vanguard Institutional Extnd Mkt Idx Tr	2.15M	1.06%	11.85K
Fidelity Small Cap Index	2.06M	1.02%	17.50K
iShares Russell 2000 Growth ETF	1.89M	0.94%	4.76K
CREF Stock R3	805.63K	0.77%	805.63K

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

SLS Ownership FAQ

Who Owns SELLAS Life Sciences Group?

SELLAS Life Sciences Group shareholders are primarily institutional investors at 42.94%, followed by 0.92% insiders and 56.14% retail investors. The average institutional ownership in SELLAS Life Sciences Group's industry, Biotech Stocks , is 384.82%, 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 Blackrock funding, inc. /de (15.07M shares, 8.74%), Vanguard group (8.47M shares, 7.81%), and State street (13M shares, 7.54%). Together, they hold 24.08% 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 3.94% of its assets in 4.5M SELLAS Life Sciences Group shares, valued at 66.42M$.

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

Vanguard MStar Total Stk Mkt Idx Invest is the top mutual fund holder of SELLAS Life Sciences Group shares, with 3.19% of its total shares outstanding invested in 6.45M SELLAS Life Sciences Group shares.

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