Baselake Partners, LP - 31 Dec 2025 SCHEDULE 13G/A Report for LeonaBio, Inc. f.k.a. Athira Pharma, Inc. Common Stock, $0.0001 par value per share (ATHA)

Filing Manager
Baselake Partners, LP
Reporting Manager
Baselake Partners, LP
Security
LeonaBio, Inc. f.k.a. Athira Pharma, Inc. Common Stock, $0.0001 par value per share
Symbol
ATHA
Shares outstanding
3,988,895 shares
Disclosed Ownership
75,789 shares
Ownership
1.9%
Form type
SCHEDULE 13G/A
Filing time
06 Feb 2026, 16:29:28 UTC
Date of event
31 Dec 2025
Previous filing
14 Nov 2025
SEC
View on sec.gov

Quoteable Key Fact

"Baselake Partners, LP disclosed 1.9% ownership in LeonaBio, Inc. f.k.a. Athira Pharma, Inc. Common Stock, $0.0001 par value per share (ATHA) on 31 Dec 2025."

Quick Takeaways

  • Baselake Partners, LP filed SCHEDULE 13G/A for LeonaBio, Inc. f.k.a. Athira Pharma, Inc. Common Stock, $0.0001 par value per share (ATHA).
  • Disclosed ownership: 1.9%.
  • Date of event: 31 Dec 2025.

What Changed

  • Previous schedule filing date: 14 Nov 2025.
  • Current filing was accepted on 06 Feb 2026, 16:29.

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 (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Baselake Partners, LP 1.9% 75,789 0 75,789 /s/ David Paolella David Paolella, Managing Member of Baselake Management, LLC, its investment manager
Baselake Management, LLC 1.9% 75,789 0 75,789 /s/ David Paolella David Paolella, Managing Member
David Paolella 1.9% 75,789 0 75,789 /s/ David Paolella Individually