[Form 4] Amrize Ltd Insider Trading Activity

Rhea-AI Filing Summary

Amrize Ltd (AMRZ) insider purchase: On 08/27/2025 Amrize CTO Roald Brouwer acquired 2,000 ordinary shares at $51.88 per share, increasing his beneficial holdings to 5,000 shares. The Form 4 shows the purchase was executed in Swiss francs at CHF 41.835 per share and converted to U.S. dollars using the transaction date exchange rate (USD 1.00 = CHF 0.8064). The filing was signed by Hans Weinburger as attorney-in-fact. The report indicates this was a direct purchase and the filer remains an officer of the company.

Positive

• Officer purchase disclosed: CTO Roald Brouwer directly acquired 2,000 shares, increasing insider ownership to 5,000 shares, which is a transparent insider purchase.

Negative

• None.

Insights

Financial Analyst

TL;DR: Insider purchase by the CTO signals modest insider conviction but size is small relative to typical material transactions.

The 2,000-share purchase at an effective price of $51.88 increases the reporting person's stake to 5,000 shares, reflecting a direct buy rather than an endorsement via options or a plan. For investors, the trade is a data point showing an officer acquiring stock, but without additional context on the company’s market capitalization or recent trading volumes the market impact is likely limited. The CHF-to-USD conversion is documented, confirming the transaction currency and settlement mechanics.

Corporate Governance Expert

TL;DR: Filing is properly completed and transparent; no governance red flags are evident from this single disclosure.

The Form 4 discloses relationship (Officer, CTO), transaction date, number of shares acquired, resulting beneficial ownership and a clear currency conversion note. The filing was executed by an attorney-in-fact and signed, consistent with practice. There is no indication of Rule 10b5-1 plan usage and no amendment noted. As a standalone disclosure it complies with Section 16 reporting requirements and raises no immediate governance concerns.

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).

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^*

Brouwer Roald

(Last) (First) (Middle)

GRAFENAUWEG 8

(Street)

ZUG V8 6300

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Amrize Ltd [ AMRZ ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Technology Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/27/2025

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	08/27/2025		P		2,000	A	$51.88(1)	5,000	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The purchase was made in Swiss Francs at a price of CHF 41.835 per share, and converted into US Dollars using the transaction date exchange rate of (USD 1.00 = CHF 0.8064).

	Hans Weinburger, Attorney-in-Fact	08/27/2025
	** 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 did Amrize Ltd (AMRZ) insider Roald Brouwer purchase?

He acquired 2,000 ordinary shares on 08/27/2025 at an effective price of $51.88 per share.

How many Amrize shares does the reporting person own after the transaction?

The filing reports 5,000 shares beneficially owned following the reported purchase.

Was the transaction in a foreign currency and how was it converted?

Yes; the purchase was made in Swiss francs at CHF 41.835 per share and converted using the transaction date rate (USD 1.00 = CHF 0.8064).

What is the reporting person's role at AMRZ?

The reporting person is listed as Chief Technology Officer and a director/officer of the issuer.

Who signed the Form 4 and when?

The form was signed by Hans Weinburger, Attorney-in-Fact on 08/27/2025.