SELLAS LIFE SCIENCES GROUP I (SLS) Institutional Ownership Changes & 13F Activity
SELLAS LIFE SCIENCES GROUP I (SLS). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Susquehanna International Group, Llp, Jones Financial Companies Lllp, Jane Street Group, Llc, Invesco Ltd., and Xtx Topco Ltd.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Buy | +3,246 | +7.1% | 48,937 | $722.31K | Q2 2026 | Sep 09, 2026 |
| Integrated Wealth Concepts Llc | Sell | -3 | -0.0% | 10,008 | $147.72K | Q2 2026 | Sep 09, 2026 |
| California State Teachers Retirement System | Buy | +193,037 | +2067.4% | 202,374 | $2.99M | Q2 2026 | Aug 24, 2026 |
| Mercer Global Advisors Inc | Buy | +48,383 | — | 48,383 | $714.12K | Q2 2026 | Aug 19, 2026 |
| Pin Oak Investment Advisors Inc | Buy | +280 | — | 280 | $4.00 | Q2 2026 | Aug 18, 2026 |
| Jefferies Financial Group Inc. | Buy | +200,459 | — | 200,459 | $2.96M | Q2 2026 | Aug 17, 2026 |
| Susquehanna International Group, Llp | Buy | +1,653,541 | +416.5% | 2,050,597 | $30.27M | Q2 2026 | Aug 14, 2026 |
| Jones Financial Companies Lllp | Buy | +629,484 | +37.6% | 2,304,561 | $28.55M | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Buy | +508,429 | — | 508,429 | $7.50M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +375,342 | — | 375,342 | $5.54M | Q2 2026 | Aug 14, 2026 |
| Xtx Topco Ltd | Buy | +359,090 | — | 359,090 | $5.30M | Q2 2026 | Aug 14, 2026 |
| Wellington Management Group Llp | Buy | +252,531 | +73.2% | 597,309 | $8.82M | Q2 2026 | Aug 14, 2026 |
| Legal & General Group Plc | Buy | +152,658 | +1008.2% | 167,800 | $2.48M | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Buy | +146,266 | +22.8% | 787,949 | $11.63M | Q2 2026 | Aug 14, 2026 |
| Wells Fargo & Company/Mn | Buy | +103,112 | +45.7% | 328,819 | $4.85M | Q2 2026 | Aug 14, 2026 |
| Highbridge Capital Management Llc | Buy | +99,400 | — | 99,400 | $1.47M | Q2 2026 | Aug 14, 2026 |
| State Of Wisconsin Investment Board | Buy | +95,210 | — | 95,210 | $1.41M | Q2 2026 | Aug 14, 2026 |
| Harvest Investment Services, Llc | Buy | +94,482 | — | 94,482 | $1.39M | Q2 2026 | Aug 14, 2026 |
| Charles Schwab Investment Management Inc | Buy | +84,404 | +17.6% | 565,008 | $8.34M | Q2 2026 | Aug 14, 2026 |
| Gotham Asset Management, Llc | Buy | +74,344 | — | 74,344 | $1.10M | Q2 2026 | Aug 14, 2026 |
| Alliancebernstein L.P. | Buy | +72,120 | +44.0% | 236,060 | $998.53K | Q2 2026 | Aug 14, 2026 |
| Engineers Gate Manager Lp | Sell | -67,785 | -81.9% | 14,995 | $221.33K | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Sell | -64,239 | -85.9% | 10,512 | $155.16K | Q2 2026 | Aug 14, 2026 |
| Caption Management, Llc | Buy | +49,373 | — | 49,373 | $728.75K | Q2 2026 | Aug 14, 2026 |
| Mangrove Partners Im, Llc | Buy | +34,140 | — | 34,140 | $503.91K | Q2 2026 | Aug 14, 2026 |
| Price T Rowe Associates Inc | Buy | +32,946 | +27.0% | 155,066 | $2.29M | Q2 2026 | Aug 14, 2026 |
| Sculptor Capital Lp | Buy | +30,300 | — | 30,300 | $447.23K | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Buy | +29,122 | +5.2% | 585,035 | $8.64M | Q2 2026 | Aug 14, 2026 |
| Teacher Retirement System Of Texas | Buy | +20,993 | — | 20,993 | $309.86K | Q2 2026 | Aug 14, 2026 |
| Mirae Asset Global Etfs Holdings Ltd. | Buy | +16,486 | +16.8% | 114,775 | $1.71M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about SLS activity
Which institutional owners are buying SLS?
Institutional owners buying SLS include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in SLS activity?
"Buy" means an investor increased their reported position in SLS compared to the prior reporting period. This reflects growing exposure to SELLAS LIFE SCIENCES GROUP I (SLS) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in SLS increasing?
Institutional interest in SLS can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related SLS Institutional Insights
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- Healthcare Sector Institutional Ownership
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- Institutional Portfolio Overlap & Shared Holdings
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- SLS Insider Trading & SEC Form 4 Activity
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