Ordinary Shares, nominal value EUR0.12 per share

NEWAMSTERDAM PHARMA COMPANY N.V.

Gooimeer 2-35, 1411, Naarden, P7, 1411 DC

The entities and persons filing this statement (collectively, the "Reporting Persons") are: Frazier Life Sciences X, L.P. ("FLS X") Frazier Lifesciences Sponsor LLC ("Sponsor") FHMLS X, L.P. FHMLS X, L.L.C. Frazier Life Sciences Public Fund, L.P. ("FLSPF") FHMLSP, L.P. FHMLSP, L.L.C. Frazier Life Sciences XI, L.P. ("FLS XI") FHMLS XI, L.P. FHMLS XI, L.L.C. Frazier Life Sciences XII, L.P. ("FLS XII") FHMLS XII, L.P. FHMLS XII, L.L.C. James N. Topper ("Topper") Patrick J. Heron ("Heron" and together with Topper, the "Members")

The address of the principal place of business for each of the Reporting Persons is: c/o Frazier Life Sciences Management, L.P. 1001 Page Mill Rd, Building 4, Suite 200B Palo Alto, CA 94304

Item 2(c) is hereby amended and restated in its entirety to read as follows: The Sponsor's principal business is to act as the sponsor of Frazier Lifesciences Acquisition Corporation, the Issuer's predecessor ("FLAC"), in connection with the initial public offering ("IPO") of FLAC and the Business Combination (as defined below). FLS X, FLS XI, FLSPF and FLS XII are venture capital funds concentrating in life sciences and related fields. The sole business of FHMLS X, L.P. is to serve as general partner of FLS X. The sole business of FHMLS XI, L.L.C. is to serve as general partner of FHMLS X, L.P. The sole business of FHMLS XI, L.P. is to serve as general partner of FLS XI. The sole business of FHMLS XI, L.L.C. is to serve as general partner of FHMLS XI, L.P. The sole business of FHMLSP, L.P. is to serve as general partner of FLSPF. The sole business of FHMLSP, L.L.C. is to serve as general partner of FHMLSP, L.P. The sole business of FHMLS XII, L.P. is to serve as general partner of FLS XII. The sole business of FHMLS XII, L.L.C. is to serve as general partner FHMLS XII, L.P. The principal business of the Members is to manage FLS X, FLSPF, FLS XI, FLS XII, FHMLS X, L.P., FHMLS X, L.L.C., FHMLSP, L.P., FHMLSP, L.L.C., FHMLS XI, L.P., FHMLS XI, L.L.C., FHMLS XII, L.P., FHMLS XII, L.L.C., and a number of affiliated partnerships with similar businesses. FLS X is also the sole member of the Sponsor and Mr. Topper serves as a manager of the Sponsor.

The information contained in row 6 of each Reporting Person's cover page to this Schedule 13D is incorporated by reference.

The information contained in Rows 7, 8, 9, 10, 11, and 13 of each Reporting Person's cover page to this Schedule 13D (including the footnotes thereto) is incorporated by reference into this Item 5. FLS X directly holds 3,028,524 Ordinary Shares and 333,333 warrants ("Warrants") to acquire an equivalent number of Ordinary Shares (collectively, the "FLS X Shares"). FHMLS X, L.P. is the general partner of FLS X and FHMLS X, L.L.C. is the general partner of FHMLS X, L.P. Heron and Topper are the members of FHMLS X, L.L.C. and therefore share voting and investment power over the FLS X Shares. Sponsor directly holds 3,801,000 Ordinary Shares and 167,000 Warrants (the "Sponsor Shares"). FLS X is the sole member of Sponsor. FHMLS X, L.P. is the general partner of FLS X and FHMLS X, L.L.C. is the general partner of FHMLS X, L.P. Heron and Topper are the members of FHMLS X, L.L.C. and therefore share voting and investment power over the Sponsor Shares. FLSPF directly holds 10,424,224 Ordinary Shares (the "FLSPF Shares"). FHMLSP, L.P. is the general partner of FLSPF and the general partner of FHMLSP, L.P. is FHMLSP, L.L.C., which is managed by an investment committee of four that acts by majority vote. Accordingly, no members of such committee are attributed beneficial ownership of the securities directly held by FLSPF. FLS XI directly holds 1,319,923 Ordinary Shares (the "FLS XI Shares"). FHMLS XI, L.P. is the general partner of FLS XI and the general partner of FHMLS XI, L.P. is FHMLS XI, L.L.C., which is managed by an investment committee of three that acts by majority vote. Accordingly, no members of such committee are attributed beneficial ownership of the securities directly held by FLS XI. FLS XII directly holds 365,231 Ordinary Shares (the "FLS XII Shares"). FHMLS XII, L.P. is the general partner of FLS XII and the general partner of FHMLS XII, L.P. is FHMLS XII, L.L.C., which is managed by an investment committee of three that acts by majority vote. Accordingly, no members of such committee are attributed beneficial ownership of the securities directly held by FLS XII. Except as specifically stated herein, the filing of this Schedule 13D shall not be construed as an admission that any Reporting Person or any of the foregoing is, for the purposes of Section 13(d) and/or Section 13(g).

Except as set forth on Exhibit 10.1 of this Schedule 13D, none of the Reporting Persons has effected any transactions relating to the Ordinary Shares during the past 60 days.