X0206 3 2020-10-15 0 0001689548 Praxis Precision Medicines, Inc. PRAX 0001826967 Vitorovic Stefan C/O PRAXIS PRECISION MEDICINES, INC. ONE BROADWAY, 16TH FLOOR CAMBRIDGE MA 02142 1 0 0 0 Series B Preferred Stock Common Stock 1939295 I See Footnote Series B-1 Preferred Stock Common Stock 257853 I See Footnote Series C Preferred Stock Common Stock 80100 I See Footnote Series C-1 Preferred Stock Common Stock 412081 I See Footnote All series of Preferred Stock are convertible into common stock on a 1-for-2.14 basis into the number of shares of common stock shown in column 3 at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. All series of Preferred Stock have no expiration date. These shares are held directly by Vida Ventures, LLC, a United States limited liability company. The Reporting Person is a managing director of Vida Ventures, LLC and is also a member of the board of directors of the Issuer. The Reporting Person disclaims beneficial ownership of such shares, except to the extent of his proportionate pecuniary interest therein, if any. Exhibit 24 - Power of Attorney /s/ Alex Nemiroff, as Attorney-in-Fact 2020-10-15