Amrize officer buys 4,000 shares in open market

Amrize Ltd Chief Supply Chain Officer Mario Gross increased his direct stake through open-market purchases of Ordinary Shares.

Rhea-AI Filing Summary

Amrize Ltd Chief Supply Chain Officer Mario Gross increased his direct stake through open-market purchases of Ordinary Shares. On May 19–20, 2026, he bought a total of 4,000 shares in three transactions at prices between $48.63 and $49.47 per share.

After these trades, Gross directly owned 34,747 Ordinary Shares. A footnote explains the purchases were executed in Swiss Francs at CHF 38.4285 per share and converted using an exchange rate of USD 1.00 = CHF 0.7902.

Insider Trade Summary

Net Buyer: 4,000 shares

Net Buy 3 txns

Insider Gross Mario

Role Chief Supply Chain Officer

Bought 4,000 shs ($196K)

Type	Security	Shares	Price	Value
Purchase	Ordinary Shares	1,200	$48.63	$58K
Purchase	Ordinary Shares	1,800	$49.47	$89K
Purchase	Ordinary Shares	1,000	$48.63	$49K

Holdings After Transaction: Ordinary Shares — 34,747 shares (Direct)

Footnotes (1)

1. F1. The purchase was made in Swiss Francs at a price of CHF 38.4285 per share, and such price was converted into US Dollars using the transaction date exchange rate (USD 1.00 = CHF 0.7902).

Key Figures

Total shares purchased: 4,000 shares Post-transaction holdings: 34,747 shares Trade price (lower): $48.63 per share +5 more

8 metrics

Total shares purchased 4,000 shares Net open-market purchases reported in Form 4

Post-transaction holdings 34,747 shares Directly owned after May 20, 2026 trade

Trade price (lower) $48.63 per share Prices for 1,000- and 1,200-share purchases

Trade price (higher) $49.47 per share Price for 1,800-share purchase

CHF trade price CHF 38.4285 per share Original currency execution price per footnote

FX rate used USD 1.00 = CHF 0.7902 Exchange rate applied for USD conversion

Shares in May 20 trade 1,200 shares Open-market purchase on May 20, 2026

Shares in largest single trade 1,800 shares Open-market purchase on May 19, 2026

Key Terms

open-market purchase, Ordinary Shares, exchange rate, Form 4

4 terms

open-market purchase financial

"he bought a total of 4,000 shares in three transactions at prices between $48.63 and $49.47 per share."

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

Ordinary Shares financial

"made three open-market purchases of Ordinary Shares, totaling 4,000 shares."

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

exchange rate financial

"converted using an exchange rate of USD 1.00 = CHF 0.7902."

Exchange rate is the price of one currency expressed in another—for example, how many euros you receive for one US dollar. It matters to investors because changes in that price alter the reported profits, costs and value of assets for companies and portfolios that operate or hold money across borders; think of it like switching measurement units, where the same item can look bigger or smaller depending on the unit used.

Form 4 regulatory

"all reported on the Form 4."

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Amrize (AMRZ) report for Mario Gross?

Amrize reported that Chief Supply Chain Officer Mario Gross made three open-market purchases of Ordinary Shares, totaling 4,000 shares. The trades occurred on May 19–20, 2026 at prices between $48.63 and $49.47 per share.

How many Amrize (AMRZ) shares does Mario Gross hold after these trades?

After the reported transactions, Mario Gross directly holds 34,747 Amrize Ordinary Shares. This figure reflects his position following the final May 20, 2026 open-market purchase disclosed in the Form 4 filing.

At what prices did Mario Gross buy Amrize (AMRZ) shares?

Mario Gross purchased Amrize Ordinary Shares at prices of $49.47 and $48.63 per share. One 1,800-share trade was at $49.47, while 1,000-share and 1,200-share trades were executed at $48.63 per share.

On what dates did the Amrize (AMRZ) insider purchases take place?

The insider purchases by Mario Gross took place on May 19 and May 20, 2026. Two trades totaling 2,800 shares occurred on May 19, followed by a 1,200-share trade on May 20, all reported on the Form 4.

How many Amrize (AMRZ) shares did Mario Gross buy in total?

Across three open-market transactions, Mario Gross bought a total of 4,000 Amrize Ordinary Shares. The Form 4 transaction summary lists 4,000 net-buy shares, with no reported sales or derivative exercises.

In what currency were the Amrize (AMRZ) insider trades executed?

A footnote states the purchases were executed in Swiss Francs at CHF 38.4285 per share. The reported U.S. dollar prices used a conversion rate of USD 1.00 = CHF 0.7902 on the transaction date.

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

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Accepted by SEC EDGAR 05/21/2026 - 12:31 PM EDT Learn about SEC filing dates

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^*

Gross Mario

(Last) (First) (Middle)

GRAFENAUWEG 8

(Street)

ZUG 6300

(City) (State) (Zip)

SWITZERLAND

(Country)

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 Supply Chain Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	05/19/2026		P		1,800	A	$49.47	32,747	D
Ordinary Shares	05/19/2026		P		1,000	A	$48.63	33,747	D
Ordinary Shares	05/20/2026		P		1,200	A	$48.63(1)	34,747	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 38.4285 per share, and such price was converted into US Dollars using the transaction date exchange rate (USD 1.00 = CHF 0.7902).

	Hans Weinburger, Attorney-in-Fact	05/21/2026
	** 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.
* Form 4: SEC 1474 (03-26)