STOCK TITAN

NewAmsterdam Pharma (NAMS) CAO trades 105000 shares under 10b5-1 plan

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Form Type
4

Rhea-AI Filing Summary

NewAmsterdam Pharma Co N.V. reports that Chief Accounting Officer Louise Frederika Kooij exercised stock options for 105000 ordinary shares on July 20, 2026, then sold 105000 shares in multiple transactions at weighted average prices of $29.9600, $31.0500 and $31.7100 per share, all under a Rule 10b5-1 trading plan adopted on February 23, 2026. Reported holdings include 22000 ordinary shares subject to restricted stock unit awards that remain subject to vesting.

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Insider Kooij Louise Frederika
Role Chief Accounting Officer
Sold 105,000 shs ($3.19M)
Approx. gross sale proceeds $3.19M
Approx. exercise cost $1.19M
Approx. pre-tax spread $1.99M
Type Security Shares Price Value
Exercise Option (right to buy) F5 25,000 $0.00 $0.00
Exercise Option (right to buy) F6 80,000 $0.00 $0.00
Exercise Ordinary Shares F1 25,000 $11.90 $298K
Exercise Ordinary Shares F1 80,000 $11.17 $894K
Sale Ordinary Shares F2, F1 70,200 $29.96 $2.10M
Sale Ordinary Shares F3, F1 31,885 $31.05 $990K
Sale Ordinary Shares F4, F1 2,915 $31.71 $92K
Holdings After Transaction: Option (right to buy) — 80,494 shares (Direct); Ordinary Shares — 24,353 shares (Direct)
Footnotes (6)
  1. F1. Includes 22,000 ordinary shares subject to restricted stock unit awards that remain subject to vesting.
  2. F2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.57 to $30.56 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.
  3. F3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $30.58 to $31.57 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. F4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.58 to $31.85 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. F5. The option was granted on May 18, 2023. 25% of the shares underlying the option vested on 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.
  6. F6. The option was granted on January 1, 2024. 25% of the shares underlying the option vested on 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.
Shares sold 105000 shares Total ordinary shares sold on 2026-07-20 across three transactions
First option exercise 25000 shares Options exercised at $11.9000 per share; option expiration 2033-05-18
Second option exercise 80000 shares Options exercised at $11.1700 per share; option expiration 2034-01-01
Weighted average sale price 1 $29.9600 per share Weighted average price; individual trades from $29.57 to $30.56
Weighted average sale price 2 $31.0500 per share Weighted average price; individual trades from $30.58 to $31.57
Weighted average sale price 3 $31.7100 per share Weighted average price; individual trades from $31.58 to $31.85
Unvested RSU shares 22000 shares Ordinary shares underlying restricted stock unit awards that remain subject to vesting
Rule 10b5-1 trading plan regulatory
"Reported transactions executed pursuant to a Rule 10b5-1 trading plan adopted"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The price reported in Column 4 is a weighted average price"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
restricted stock unit awards financial
"Includes 22000 ordinary shares subject to restricted stock unit awards"
Restricted stock unit awards are company promises to deliver a specific number of shares to employees or service providers in the future once conditions—such as staying with the company for a set time or meeting performance targets—are met. They matter to investors because when the promises convert into actual shares they increase the total share count and can reduce earnings per share, while also aligning recipients’ interests with stock performance much like deferred pay that turns into ownership if goals are met.
derivative security financial
"transaction_code_description: Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
vesting financial
"shares underlying the option vested with the remaining shares vesting in equal"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What insider stock transactions did NewAmsterdam Pharma (NAMS) report on July 20, 2026?

NewAmsterdam Pharma reported that Chief Accounting Officer Louise Frederika Kooij exercised options for 105000 ordinary shares and sold 105000 shares on July 20, 2026 in multiple transactions at weighted average prices between $29.9600 and $31.7100 per share under a Rule 10b5-1 trading plan.

How many NewAmsterdam Pharma (NAMS) shares did Louise Frederika Kooij sell, and at what prices?

Louise Frederika Kooij sold 105000 ordinary shares in three blocks at weighted average prices of $29.9600, $31.0500 and $31.7100 per share, with individual trade prices ranging from $29.57 to $31.85, as detailed in the footnotes.

What stock options did NewAmsterdam Pharma (NAMS)'s chief accounting officer exercise?

She exercised options covering 25000 shares at an exercise price of $11.9000 per share, expiring May 18, 2033, and 80000 shares at $11.1700 per share, expiring January 1, 2034. The options were originally granted in 2023 and 2024 with four-year vesting schedules.

Were the NAMS insider transactions made under a Rule 10b5-1 trading plan?

Yes. The company states the reported transactions were executed pursuant to a Rule 10b5-1 trading plan adopted by Louise Frederika Kooij on February 23, 2026. Such plans pre-arrange trade timing and size, reducing the significance of day-to-day market timing.

How many restricted stock unit shares does the NewAmsterdam Pharma (NAMS) officer still have?

Reported holdings include 22000 ordinary shares subject to restricted stock unit awards that remain subject to vesting. These shares are part of her equity compensation and will only fully belong to her as the specified vesting conditions are satisfied over time.

What is Louise Frederika Kooij's role at NewAmsterdam Pharma (NAMS)?

The reporting person, Louise Frederika Kooij, serves as NewAmsterdam Pharma's Chief Accounting Officer. Her Form 4 filing details personal equity transactions in the company’s ordinary shares and related stock options connected to her executive compensation package.
SEC Form 4
FORM 4UNITED 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*
Kooij Louise Frederika

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

(Street)
NAARDEN1411 DC

(City)(State)(Zip)

NETHERLANDS

(Country)
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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Accounting Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/20/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Ordinary Shares07/20/2026M25,000A$11.949,353(1)D
Ordinary Shares07/20/2026M80,000A$11.17129,353(1)D
Ordinary Shares07/20/2026S70,200D$29.96(2)59,153(1)D
Ordinary Shares07/20/2026S31,885D$31.05(3)27,268(1)D
Ordinary Shares07/20/2026S2,915D$31.71(4)24,353(1)D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Option (right to buy)$11.907/20/2026M25,000 (5)05/18/2033Ordinary Shares25,000$0.0010,000D
Option (right to buy)$11.1707/20/2026M80,000 (6)01/01/2034Ordinary Shares80,000$0.0070,494D
Explanation of Responses:
1. Includes 22,000 ordinary shares subject to restricted stock unit awards that remain subject to vesting.
2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.57 to $30.56 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.
3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $30.58 to $31.57 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 $31.58 to $31.85 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 option was granted on May 18, 2023. 25% of the shares underlying the option vested on 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.
6. The option was granted on January 1, 2024. 25% of the shares underlying the option vested on 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.
Remarks:
Reported transactions executed pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 23, 2026.
/s/ Louise Kooij07/22/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)