X0206 3 2020-08-18 0 0001802665 Harmony Biosciences Holdings, Inc. HRMY 0001602402 Nielsen Jack C/O HARMONY BIOSCIENCES, INC. 630 W. GERMANTOWN PIKE, SUITE 215 PLYMOUTH MEETING PA 19462 1 0 0 0 Series A Preferred Stock Common Stock 3208764 I By Vivo Capital Fund VIII, L.P. Series A Preferred Stock Common Stock 443091 I By Vivo Capital Surplus Fund VIII, L.P. Series C Preferred Stock Common Stock 183358 I By Vivo Capital Fund VIII, L.P. Series C Preferred Stock Common Stock 25319 I By Vivo Capital Surplus Fund VIII, L.P. The Series A Preferred Stock is convertible into Common Stock on a 8.215-for-1 basis into the number of shares of Common Stock as shown in Column 3 at the holder's election and automatically upon the closing of the Issuer's initial public offering without payment or further consideration. These shares have no expiration date. The management company of the holder is Vivo Capital LLC, of which the Reporting Person is a voting member. The Reporting Person may be deemed to share voting and dispositive power over these shares with four (4) other voting members. The Reporting Person disclaims beneficial ownership over such shares except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purposes. The Series C Preferred Stock is convertible into Common Stock on a 8.215-for-1 basis into the number of shares of Common Stock as shown in Column 3 at the holder's election and automatically upon the closing of the Issuer's initial public offering without payment or further consideration. These shares have no expiration date. Exhibit 24 - Power of Attorney. /s/ Stephanie Wisdo, Attorney-in-fact for Jack Bech Nielsen 2020-08-18