SCHEDULE 13D/A

Keros Therapeutics Inc

Common Stock, $0.0001 par value per share · CUSIP: 492327101

Event date: 2025-05-08

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

• ADAR1 Capital Management, LLCReported CIK 0001940272

  Shares: 5,390,964.00 · Class: 13.27%

• ADAR1 Capital Management GP, LLC

  Shares: 4,647,406.00 · Class: 11.44%

• Daniel Schneeberger

  Shares: 5,390,964.00 · Class: 13.27%

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