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: SLS 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	776,012	0.456%
Institutions	35,361,406	20.8%
General Public	134,144,608	78.8%

Dilution of Shares: Shareholders have been substantially diluted in the past year, with total shares outstanding growing by 116.7%.

Top Shareholders

Top 25 shareholders own 19.79% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
4.97%	The Vanguard Group, Inc.	8,467,400	US$31.1m	23.8%	no data
3.54%	Anson Group	6,032,938	US$22.1m	2,090%	2.66%
3.34%	BlackRock, Inc.	5,686,886	US$20.9m	23.9%	no data
1.38%	Marshall Wace LLP	2,357,999	US$8.7m	-13.2%	0.01%
1.33%	Geode Capital Management, LLC	2,264,384	US$8.3m	2.91%	no data
0.8%	State Street Global Advisors, Inc.	1,360,914	US$5.0m	22.3%	no data
0.58%	Morgan Stanley	982,119	US$3.6m	-9.29%	no data
0.57%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	971,329	US$3.6m	0%	no data
0.51%	Susquehanna International Group, LLP	863,575	US$3.2m	-42%	no data
0.43%	Northern Trust Global Investments	731,175	US$2.7m	4.68%	no data
0.34%	Dagco, Inc.	577,540	US$2.1m	0%	0.49%
0.27%	Everhart Financial Group, Inc.	466,216	US$1.7m	40.8%	0.16%
0.2%	GSA Capital Partners LLP	345,052	US$1.3m	-33.5%	0.11%
0.19%	Opus Capital Management, LLC	317,100	US$1.2m	26.8%	0.12%
0.18%	Millennium Management LLC	314,702	US$1.2m	-72.1%	no data
0.18%	Angelos Stergiou	305,216	US$1.1m	180%	no data
0.17%	Charles Schwab Investment Management, Inc.	294,106	US$1.1m	0%	no data
0.17%	Renaissance Technologies LLC	291,822	US$1.1m	0%	no data
0.12%	BNY Asset Management	205,682	US$754.9k	2.1%	no data
0.11%	Citadel Advisors LLC	194,357	US$713.3k	129%	no data
0.086%	Two Sigma Investments, LP	145,856	US$535.3k	-26.2%	no data
0.085%	Barclays PLC	144,052	US$528.7k	-16.6%	no data
0.08%	Rhumbline Advisers Ltd Partnership	136,639	US$501.4k	0.63%	no data
0.071%	Deutsche Asset & Wealth Management	121,025	US$444.1k	5,080%	no data
0.07%	John Burns	118,711	US$435.6k	144%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/02/12 12:29
End of Day Share Price	2026/02/12 00:00
Earnings	2025/09/30
Annual Earnings	2024/12/31

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