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SLS · SELLAS Life Sciences Group, Inc.

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$13.86 +0.16 (+1.17%) At close · Sep 4
Market Cap
$2.80B
Shares
201.95M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 207
Total Value: $1,530,268,910
Total Shares: 103,676,763
Showing 1–100 of 232 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 207 13F filers · Δ vs Mar 31, 2026
Top Holder
14.5%
Sep 2023 → Jun 2026 · range 14.5% – 50.9%
−3.0 pts
Top 5
54.8%
Sep 2023 → Jun 2026 · range 54.8% – 87.7%
−5.4 pts
Top 10
71.8%
Sep 2023 → Jun 2026 · range 71.8% – 96.9%
−3.4 pts
HHI
740
Sep 2023 → Jun 2026 · range 740 – 3,055
Broadly held−118

Quarterly Activity

vs Mar 31, 2026
New
68
Increased
87
Decreased
26
Sold Out
26
Unchanged
26
Holder count: +42
Institutional value: +419.2%
Shares held: +48.8%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 232
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1390478 CUSIP 81642T209 13F (30d) 121 filings 121 filers Visit website Investor relations