Insider Transaction Report for Lynn A. Tetrault

Lynn A. Tetrault, a director at RHYTHM PHARMACEUTICALS, INC., reported several transactions on June 23rd and 24th, 2026. On June 23rd, Tetrault acquired 4,712 shares of Common Stock (transaction code M, acquired code A) with a post-transaction share count of 11,712. Concurrently, 4,712 Restricted Stock Units (RSUs) were disposed of (transaction code M, disposed code D), with these RSUs representing a contingent right to receive one share of common stock and being fully vested with no expiration date. On June 24th, Tetrault acquired 3,691 Stock Options (right to buy) with a strike price of $107.55 and 2,324 RSUs. Both the stock options and RSUs acquired on June 24th are subject to vesting conditions related to continued service and specific dates in 2027, with the RSUs having no expiration date. All transactions were direct holdings.