SELLAS Life Sciences Group Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqCM:SLS Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
19 Nov 25	BuyUS$100,806	Katherine Kalin	Individual	63,400	US$1.59
12 Jun 25	BuyUS$14,800	Robert Van Nostrand	Individual	10,000	US$1.48
30 May 25	BuyUS$33,800	Jane Wasman	Individual	20,000	US$1.69
22 May 25	BuyUS$36,000	Katherine Kalin	Individual	20,000	US$1.80

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of SLS?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	765,430	0.426%
Institutions	35,667,923	19.9%
General Public	143,149,221	79.7%

Dilution of Shares: Shareholders have been substantially diluted in the past year, with total shares outstanding growing by 97.7%.

Top Shareholders

Top 25 shareholders own 18.47% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
4.72%	The Vanguard Group, Inc.	8,467,400	US$40.3m	23.8%	no data
4.2%	BlackRock, Inc.	7,541,054	US$35.9m	32.6%	no data
1.71%	Geode Capital Management, LLC	3,077,337	US$14.6m	35.9%	no data
1.22%	State Street Global Advisors, Inc.	2,188,171	US$10.4m	60.8%	no data
0.77%	Millennium Management LLC	1,387,849	US$6.6m	341%	no data
0.75%	Marshall Wace LLP	1,340,668	US$6.4m	-43.1%	0.01%
0.6%	Two Sigma Investments, LP	1,082,207	US$5.2m	642%	0.01%
0.56%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	997,380	US$4.7m	2.68%	no data
0.52%	Northern Trust Global Investments	930,750	US$4.4m	27.3%	no data
0.48%	Morgan Stanley	859,081	US$4.1m	-12.5%	no data
0.32%	Dagco, Inc.	577,540	US$2.7m	0%	0.63%
0.28%	Clear Street LLC	500,000	US$2.4m	0%	0.01%
0.24%	Edward Jones Trust Company	429,243	US$2.0m	115,000%	no data
0.23%	Charles Schwab Investment Management, Inc.	408,401	US$1.9m	0%	no data
0.22%	The Goldman Sachs Group, Inc.	391,319	US$1.9m	1,930%	no data
0.2%	Everhart Financial Group, Inc.	364,397	US$1.7m	-21.8%	0.14%
0.19%	Susquehanna International Group, LLP	349,755	US$1.7m	-59.5%	no data
0.19%	GSA Capital Partners LLP	345,052	US$1.6m	-33.5%	0.14%
0.18%	Opus Capital Management, LLC	317,100	US$1.5m	26.8%	0.16%
0.17%	Barclays Bank PLC	312,993	US$1.5m	710%	no data
0.17%	Angelos Stergiou	305,216	US$1.5m	180%	no data
0.17%	Wells Fargo & Company	299,305	US$1.4m	295%	no data
0.14%	BNY Asset Management	256,409	US$1.2m	24.7%	no data
0.14%	Rafferty Asset Management, LLC	249,428	US$1.2m	0%	no data
0.11%	Barclays PLC	198,041	US$942.7k	37.5%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/04/13 23:30
End of Day Share Price	2026/04/13 00:00
Earnings	2025/12/31
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

SELLAS Life Sciences Group, Inc. is covered by 4 analysts. 3 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
James Molloy	Alliance Global Partners
Aydin Huseynov	Ladenburg Thalmann & Company
Jason McCarthy	Maxim Group