[Form 4] Amrize Ltd Insider Trading Activity

Rhea-AI Filing Summary

Amrize Ltd (AMRZ) disclosed a Form 4 showing its Chief Technology Officer purchased a total of 4,000 ordinary shares on 10/31/2025 across two open‑market trades at $51.78 (3,000 shares) and $51.76 (1,000 shares). Following these transactions, the officer directly holds 9,000 shares.

The filing notes the trades were executed in Swiss Francs at CHF 41.51 and CHF 41.50 per share, converted using the transaction‑date exchange rate of USD 1.00 = CHF 0.8017.

Insights

Insider transactions analyst

Officer bought 4,000 AMRZ shares; holdings now 9,000.

The CTO of Amrize Ltd reported buying 3,000 shares at $51.78 and 1,000 shares at $51.76 on 10/31/2025. These were open‑market purchases, increasing direct ownership to 9,000 shares.

The explanation specifies execution in CHF at CHF 41.51 and CHF 41.50, with a conversion rate of USD 1.00 = CHF 0.8017. This clarifies the USD prices shown. Actual impact depends on future disclosures and broader trading activity.

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)
10/31/2025

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	10/31/2025		P		3,000	A	$51.78(1)	8,000	D
Ordinary Shares	10/31/2025		P		1,000	A	$51.76(2)	9,000	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 41.51 per share, and converted into US Dollars using the transaction date exchange rate of (USD 1.00 = CHF 0.8017).

2. The purchase was made in Swiss Francs at a price of CHF 41.50 per share, and converted into US Dollars using the transaction date exchange rate of (USD 1.00 = CHF 0.8017).

	Hans Weinburger, Attorney-in-Fact	11/04/2025
	** 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 insider activity did AMRZ report?

A Form 4 reports the CTO purchased 4,000 ordinary shares on 10/31/2025 in open‑market trades.

At what prices were the AMRZ shares bought?

Two purchases: $51.78 for 3,000 shares and $51.76 for 1,000 shares.

How many AMRZ shares does the officer own after these trades?

Direct beneficial ownership is 9,000 shares following the reported transactions.

What is the relationship of the reporting person to AMRZ?

The reporting person is an Officer, serving as Chief Technology Officer.

Were the trades executed in a foreign currency?

Yes. Trades were at CHF 41.51 and CHF 41.50 per share, converted using USD 1.00 = CHF 0.8017.

Was this a single purchase or multiple trades for AMRZ?

Multiple trades: 3,000 shares and 1,000 shares on the same date.