Amrize Ltd President Resigns; Mario Gross Appointed

What Happened Amrize Ltd (AMRZ) announced that Jake Gosa, its President, Building Envelope, submitted a notice of resignation on September 6, 2026. That notice triggers a 12‑month termination notice period under his employment agreement, so Mr. Gosa will remain an employee through September 6, 2027. On September 11, 2026 the Board appointed Mario Gross to replace Mr. Gosa as President, Building Envelope, effective September 11, 2026. The company disclosed the changes in a press release issued the same day under Regulation FD.

Key Details

• Resignation notice date: September 6, 2026.
• Notice period length: 12 months; employment continues through September 6, 2027.
• Successor appointed: Mario Gross, effective September 11, 2026.
• Disclosure: Company issued a press release on September 11, 2026 (Exhibit 99.1).

Why It Matters This 8‑K reports an executive change at the leadership level for Amrize's Building Envelope business. The 12‑month notice period means the departing executive remains on staff for a year, which can provide continuity and an orderly transition. Investors should note the change in management for the business unit and the company’s timely public disclosure via press release.