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

SELLAS Life Sciences Group Ownership Summary

SELLAS Life Sciences Group is owned by 27.62% institutional investors, 0.43% insiders, and 71.95% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 11.19% of SLS shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.95% of its assets in SELLAS Life Sciences Group shares.

SLS Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	SELLAS Life Sciences Group	27.62%	0.43%	71.95%
Sector	Healthcare Stocks	35.74%	11.83%	52.43%
Industry	Biotech Stocks	36.05%	11.82%	52.13%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	12.20M	11.19%	$51.60M
Vanguard group	8.47M	7.81%	$31.92M
State street	8.40M	7.70%	$35.52M
Anson funds management lp	6.03M	6.12%	$9.71M
Geode capital management	3.91M	3.59%	$16.55M
Alyeska investment group	1.48M	3.30%	$1.76M
Marshall wace, llp	2.04M	1.87%	$8.62M
Jones financial companies lllp	1.68M	1.54%	$7.31M
Morgan stanley	1.34M	1.23%	$5.65M
Northern trust	1.28M	1.17%	$5.40M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Vision financial markets	304.40K	1.26%	$1.29M
Dagco	1.03M	0.94%	$4.35M
Anson funds management lp	6.03M	0.88%	$9.71M
Opus capital group	346.45K	0.16%	$1.47M
Everhart financial group	364.40K	0.13%	$1.54M
Scientech research	34.10K	0.12%	$144.23K
Instrumental wealth	44.91K	0.12%	$189.99K
Visionary horizons	36.00K	0.07%	$152.28K
Grange capital	17.65K	0.07%	$74.66K
Oxford asset management llp	35.50K	0.06%	$150.17K

Top Buyers

Holder	Shares	% Assets	Change
State street	8.40M	0.00%	6.21M
Anson funds management lp	6.03M	0.88%	5.76M
Blackrock funding, inc. /de	12.20M	0.00%	4.66M
Vanguard group	8.47M	0.00%	1.63M
Jones financial companies lllp	1.68M	0.00%	1.25M

Top Sellers

Holder	Shares	% Assets	Change
Millennium management	159.52K	0.00%	-1.23M
Two sigma investments, lp	403.17K	0.00%	-679.04K
Clear street group	-	-	-500.00K
Barclays	32.41K	-	-478.62K
Nuveen	670.97K	0.00%	-352.99K

New Positions

Holder	Shares	% Assets	Change	Value
Vanguard fiduciary trust	1.20M	0.00%	1.20M	$5.09M
Wellington management group llp	344.78K	0.00%	344.78K	$1.46M
Vision financial markets	304.40K	1.26%	304.40K	$1.29M
Simplex trading	295.16K	0.00%	295.16K	$1.25B
Rafferty asset management	249.43K	0.00%	249.43K	$1.06M

Sold Out

Holder	Change
Qube research	-2.00
Nvwm	-201.00
Strengthening families & communities	-500.00
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 %
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%
Mar 31, 2025	48	37.14%	14,287,718	110.42%	16	16.45%	34	88.89%	6	20.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Total Stock Mkt Idx Inv	5.44M	2.95%	474.95K
State Street® SPDR® S&P® Biotech ETF	5.23M	2.83%	-51.67K
iShares Russell 2000 ETF	4.02M	2.18%	33.89K
Vanguard US Total Market Shares ETF	1.69M	1.86%	-
Vanguard Institutional Extnd Mkt Idx Tr	1.92M	1.04%	21.18K
CREF Stock R3	805.63K	0.77%	805.63K
iShares Russell 2000 Growth ETF	1.40M	0.76%	3.62K
Fidelity Small Cap Index	1.21M	0.66%	11.62K
State St Russell Sm/Mid Cp® Indx SL Cl I	1.02M	0.55%	-
Vanguard Russell 2000 ETF	869.78K	0.47%	23.65K

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 27.62%, followed by 0.43% insiders and 71.95% retail investors. The average institutional ownership in SELLAS Life Sciences Group's industry, Biotech Stocks , is 36.05%, 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 (12.2M shares, 11.19%), Vanguard group (8.47M shares, 7.81%), and State street (8.4M shares, 7.70%). Together, they hold 26.70% of SELLAS Life Sciences Group’s total shares outstanding.

Does Blackrock own SELLAS Life Sciences Group?

BlackRock is not among the top 10 institutional shareholders of SELLAS Life Sciences Group.

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

Vision financial markets is SELLAS Life Sciences Group’s biggest shareholder by percentage of total assets invested, with 1.26% of its assets in 304.4K SELLAS Life Sciences Group shares, valued at 1.29M$.

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 2.95% of its total shares outstanding invested in 5.44M SELLAS Life Sciences Group shares.

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