Anson Funds Management LP - 31 Dec 2025 SCHEDULE 13G/A Report for SELLAS Life Sciences Group, Inc. Common Stock, par value $0.0001 per share (SLS)

Filing Manager
Anson Funds Management LP
Reporting Manager
Anson Funds Management LP
Security
SELLAS Life Sciences Group, Inc. Common Stock, par value $0.0001 per share
Symbol
SLS
Shares outstanding
152,677,102 shares
Disclosed Ownership
7,481,178 shares
Ownership
4.9%
Form type
SCHEDULE 13G/A
Filing time
17 Feb 2026, 10:34:33 UTC
Date of event
31 Dec 2025
Previous filing
14 Nov 2025
SEC
View on sec.gov

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Quoteable Key Fact

"Anson Funds Management LP disclosed 4.9% ownership in SELLAS Life Sciences Group, Inc. Common Stock, par value $0.0001 per share (SLS) on 31 Dec 2025."

Quick Takeaways

  • Anson Funds Management LP filed SCHEDULE 13G/A for SELLAS Life Sciences Group, Inc. Common Stock, par value $0.0001 per share (SLS).
  • Disclosed ownership: 4.9%.
  • Date of event: 31 Dec 2025.

What Changed

  • Previous schedule filing date: 14 Nov 2025.
  • Current filing was accepted on 17 Feb 2026, 10:34.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Source Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (6)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Anson Funds Management LP 4.9% 7,481,178 0 7,481,178 /s/ Tony Moore Tony Moore, Manager
Anson Management GP LLC 4.9% 7,481,178 0 7,481,178 /s/ Tony Moore Tony Moore, Manager
Tony Moore 4.9% 7,481,178 0 7,481,178 /s/ Tony Moore Tony Moore, Manager
Anson Advisors Inc. 4.9% 7,481,178 0 7,481,178 /s/ Amin Nathoo Amin Nathoo, Director
Amin Nathoo 4.9% 7,481,178 0 7,481,178 /s/ Amin Nathoo Amin Nathoo, Director
Moez Kassam 4.9% 7,481,178 0 7,481,178 /s/ Moez Kassam Moez Kassam, Director

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