How many institutional investors hold SLS?

3 tracked institutional investors disclosed a position in SLS (SELLAS LIFE SCIENCES GROUP I) in their most recent 13F filing.

Who is the largest institutional holder of SLS?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in SLS, valued at $97M.

Did institutional ownership of SLS increase or decrease?

Across recent 13F filings, tracked investors recorded 0 new positions, 0 increased, 0 reduced, and 0 fully exited SLS.

Where does this SLS ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

SLS — SELLAS LIFE SCIENCES GROUP I

Name: SELLAS LIFE SCIENCES GROUP I (SLS) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying SLS?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence

Institutional Conviction

Net distribution · 0 buying vs 0 selling last quarter

Macro Tailwind

Macro conditions are mixed for this sector

Why? — Evidence & Confidence ▾

No tracked investor changed their SLS position last quarter. Macro conditions are mixed for this sector (Macro Tailwind 57/100 in a Contraction regime).

Supporting evidence

+3 tracked investors reported holding SLS at their latest filing
+Macro Health is 57/100 in a Contraction regime — historically acceptable for this sectorsource

Contradicting evidence — always shown

−13F data is disclosed up to 45 days after quarter end — positions may have changed since

Know the limits

· 13F disclosure lag (up to 45 days)
· Tracked investors are a sample, not the whole market
· Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 9/6/2026.

About SELLAS LIFE SCIENCES GROUP I (SLS)

SELLAS LIFE SCIENCES GROUP I (SLS) appears in the most recent 13F filings of 3 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $97M. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in SLS

/100

Mixed Activity

Added / Increased0

Reduced0

Exited0

No recent activity recorded.

Crowded Trade Score™

How many top investors track SLS

/100

Emerging Interest

3investors

A small number of top investors own this.

UndiscoveredCrowded

151015+

SLS Ownership Composition

How SELLAS LIFE SCIENCES GROUP I is held across tracked investor types, based on reported 13F positions.

Dominant Type

Multi-Strategy / Quant

96% of tracked value

Institutions

tracked investors

Total Reported

$118.9M

combined 13F value

Multi-Strategy / Quant95.7%
Macro4.3%

Multi-Strategy / Quant(2)

95.7%

Macro(1)

4.3%

Tracked investors currently reporting SLS

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	6.6M	$97.5M	0.01%	Jun 30, 2026
Izzy Englander	Millennium Management	1.1M	$16.3M	0.01%	Jun 30, 2026
Paul Tudor Jones	Tudor Investment Corp	349.4K	$5.2M	0.01%	Jun 30, 2026

Ken GriffinJun 30, 2026
Citadel Advisors
Shares
6.6M
Value
$97.5M
% Portfolio
0.01%
Izzy EnglanderJun 30, 2026
Millennium Management
Shares
1.1M
Value
$16.3M
% Portfolio
0.01%
Paul Tudor JonesJun 30, 2026
Tudor Investment Corp
Shares
349.4K
Value
$5.2M
% Portfolio
0.01%

Recent activity

Investor	Action	Δ %	Current value	Filing date
No recent activity.

No recent activity.

Frequently asked questions

How many institutional investors hold SLS?: 3 tracked institutional investors disclosed a position in SLS (SELLAS LIFE SCIENCES GROUP I) in their most recent 13F filing.
Who is the largest institutional holder of SLS?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in SLS, valued at $97M.
Did institutional ownership of SLS increase or decrease?: Across recent 13F filings, tracked investors recorded 0 new positions, 0 increased, 0 reduced, and 0 fully exited SLS.
Where does this SLS ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.