ADAR1 Sends Open Letter to Keros Board of Directors Urging the Board to Engage Constructively on Strategy, Capital Allocation and Board Refreshment

AUSTIN, Texas, Aug. 21, 2025 /PRNewswire/ -- ADAR1 Capital Management, LLC (together with its affiliates, "ADAR1" or "we"), the largest stockholder of Keros Therapeutics (Nasdaq: KROS) ("Keros" or the "Company") with approximately 13.3% of the Company's outstanding shares, today released an open letter to Keros' Board of Directors (the "Board") expressing its disappointment with the Board's refusal to engage with ADAR1 on the Company's strategy, capital allocation priorities and Board refreshment.

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