SCHEDULE 13G/A

Keros Therapeutics Inc

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

Event date: 2025-12-31

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

• D. E. Shaw & Co., L.P.

  Shares: 756,156.00 · Class: 3.9%

• D. E. Shaw & Co., L.L.C.

  Shares: 755,473.00 · Class: 3.9%

• David E. Shaw

  Shares: 756,156.00 · Class: 3.9%

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