SCHEDULE 13G

ATHIRA PHARMA INC

Common Stock, $0.0001 Par Value · CUSIP: 04746L104

Event date: 2025-12-22

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• ACORN BIOVENTURES, L.P.

  Shares: 210,730.00 · Class: 2.2%

• ACORN CAPITAL ADVISORS GP, LLC

  Shares: 210,730.00 · Class: 2.2%

• ACORN BIOVENTURES 2, L.P.

  Shares: 291,009.00 · Class: 3.0%

• Acorn Capital Advisors GP 2, LLC

  Shares: 291,009.00 · Class: 3.0%

• Anders Hove

  Shares: 501,739.00 · Class: 5.2%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.