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NewAmsterdam Pharma (NAMS) CEO exercises 306,293 options under 10b5-1 plan with GRAT transfer

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

NewAmsterdam Pharma Co N.V. CEO Michael H. Davidson reported a multi-day option exercise-and-sell transaction from February 24 through February 26, 2026, under a Rule 10b5-1 trading plan. He exercised options for 306,293 ordinary shares at EUR 1.16392 per share and sold 306,293 shares at prices ranging from $33.63 to $36.68 per share.

The filing also reports a February 26 transfer of 285,715 ordinary shares to a grantor retained annuity trust (GRAT). Following the transactions, Davidson held 174,144 ordinary shares directly and 285,715 shares indirectly through the GRAT, with 682,974 options remaining under the reported grant.

Positive

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Negative

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Insider Davidson Michael H.
Role Chief Executive Officer
Sold 306,293 shs ($10.58M)
Type Security Shares Price Value
Exercise Option (right to buy) 183,332 $0.00 --
Exercise Ordinary Shares 183,332 $0.00 --
Sale Ordinary Shares 165,408 $33.63 $5.56M
Sale Ordinary Shares 17,924 $34.44 $617K
Exercise Option (right to buy) 58,253 $0.00 --
Exercise Ordinary Shares 58,253 $0.00 --
Sale Ordinary Shares 46,517 $35.11 $1.63M
Sale Ordinary Shares 10,436 $35.96 $375K
Sale Ordinary Shares 1,300 $36.68 $48K
Exercise Option (right to buy) 64,708 $0.00 --
Exercise Ordinary Shares 64,708 $0.00 --
Sale Ordinary Shares 61,547 $36.13 $2.22M
Sale Ordinary Shares 3,161 $36.46 $115K
holding Ordinary Shares -- -- --
Holdings After Transaction: Option (right to buy) — 682,974 shares (Direct); Ordinary Shares — 643,191 shares (Direct); Ordinary Shares — 285,715 shares (Indirect, By GRAT)
Footnotes (1)
  1. The exercise price of the option is EUR 1.16392. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $35.43 to $36.42 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.43 to $36.50 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.57 to $35.56 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $35.57 to $36.55 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.58 to $36.74 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.34 to $34.33 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.35 to $34.82 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction. The amount reported in Column 5 reflects the transfer of 285,715 ordinary shares from the Reporting Person to the Michael H. Davidson 2026 Grantor Retained Annuity Trust (the "GRAT") on February 26, 2026, which transfer was exempt from Section 16 pursuant to Rule 16a-13 under the Securities Exchange Act of 1934. The Reporting Person is the sole annuitant and trustee of the GRAT. The option was granted on November 22, 2022 to replace options originally granted on July 6, 2021 which was cancelled in connection with the consummation of NewAmsterdam Pharma Company N.V.'s business combination with Frazier Lifesciences Acquisition Corporation. 25% of the shares underlying the options vested on August 1, 2021, the one-year anniversary of vesting start date, with the remaining shares vesting in equal monthly installments thereafter for three years, subject to the Reporting Person's continued service through each such date.
SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Davidson Michael H.

(Last) (First) (Middle)
C/O NEWAMSTERDAM PHARMA COMPANY N.V.
GOOIMEER 2-35

(Street)
NAARDEN P7 1411 DC

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
NewAmsterdam Pharma Co N.V. [ NAMS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
X Officer (give title below) Other (specify below)
Chief Executive Officer
3. Date of Earliest Transaction (Month/Day/Year)
02/24/2026
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Ordinary Shares 02/24/2026 M 64,708 A (1) 524,567 D
Ordinary Shares 02/24/2026 S 61,547 D $36.13(2) 463,020 D
Ordinary Shares 02/24/2026 S 3,161 D $36.46(3) 459,859 D
Ordinary Shares 02/25/2026 M 58,253 A (1) 518,112 D
Ordinary Shares 02/25/2026 S 46,517 D $35.11(4) 471,595 D
Ordinary Shares 02/25/2026 S 10,436 D $35.96(5) 461,159 D
Ordinary Shares 02/25/2026 S 1,300 D $36.68(6) 459,859 D
Ordinary Shares 02/26/2026 M 183,332 A (1) 643,191 D
Ordinary Shares 02/26/2026 S 165,408 D $33.63(7) 477,783 D
Ordinary Shares 02/26/2026 S 17,924 D $34.44(8) 174,144(9) D
Ordinary Shares 285,715(9) I By GRAT
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Option (right to buy) (1) 02/24/2026 M 64,708 (10) 07/06/2031 Ordinary Shares 64,708 $0.00 924,559 D
Option (right to buy) (1) 02/25/2026 M 58,253 (10) 07/06/2031 Ordinary Shares 58,253 $0.00 866,306 D
Option (right to buy) (1) 02/26/2026 M 183,332 (10) 07/06/2031 Ordinary Shares 183,332 $0.00 682,974 D
Explanation of Responses:
1. The exercise price of the option is EUR 1.16392.
2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $35.43 to $36.42 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.
3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.43 to $36.50 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.
4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.57 to $35.56 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.
5. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $35.57 to $36.55 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.
6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.58 to $36.74 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.
7. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.34 to $34.33 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.
8. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.35 to $34.82 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold in each transaction.
9. The amount reported in Column 5 reflects the transfer of 285,715 ordinary shares from the Reporting Person to the Michael H. Davidson 2026 Grantor Retained Annuity Trust (the "GRAT") on February 26, 2026, which transfer was exempt from Section 16 pursuant to Rule 16a-13 under the Securities Exchange Act of 1934. The Reporting Person is the sole annuitant and trustee of the GRAT.
10. The option was granted on November 22, 2022 to replace options originally granted on July 6, 2021 which was cancelled in connection with the consummation of NewAmsterdam Pharma Company N.V.'s business combination with Frazier Lifesciences Acquisition Corporation. 25% of the shares underlying the options vested on August 1, 2021, the one-year anniversary of vesting start date, with the remaining shares vesting in equal monthly installments thereafter for three years, subject to the Reporting Person's continued service through each such date.
/s/ Michael H. Davidson 02/26/2026
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transactions did NewAmsterdam Pharma (NAMS) CEO report in this Form 4?

CEO Michael H. Davidson exercised options for 306,293 ordinary shares and sold them in open-market transactions from February 24 through February 26, 2026. These were exercises of options originally granted at EUR 1.16392 per share, carried out under a pre-arranged Rule 10b5-1 trading plan.

How many NewAmsterdam Pharma (NAMS) shares does the CEO hold after these transactions?

After the reported transactions, Davidson directly holds 174,144 ordinary shares. An additional 285,715 shares are held indirectly through the Michael H. Davidson 2026 Grantor Retained Annuity Trust, where he is sole annuitant and trustee.

How many options does the NAMS CEO have remaining?

After exercising 306,293 options, Davidson retains 682,974 options from this specific grant, expiring July 6, 2031. The options were originally granted at EUR 1.16392 per share.

Were the NAMS CEO share transactions pre-planned?

Yes. The Form 4 indicates the transactions were made pursuant to a Rule 10b5-1 trading plan, which is a pre-arranged plan that allows insiders to trade at predetermined times. This indicates the trades were not based on material non-public information.

What is the grantor retained annuity trust mentioned in the NAMS filing?

On February 26, 2026, Davidson transferred 285,715 ordinary shares to the Michael H. Davidson 2026 Grantor Retained Annuity Trust. He serves as sole annuitant and trustee. This is an estate planning vehicle and the shares are reported as indirectly owned.

What type of transaction was this?

This was a multi-day option exercise-and-sell series. Davidson exercised vested stock options (transaction code M) to acquire shares and sold them (transaction code S) over three days, at prices ranging from $33.63 to $36.68 per share. The exercise and sale quantities match, indicating the shares sold were acquired through the option exercises.