secwatch.observer — SEC 8-K summary
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Issuer:     Amrize Ltd (AMRZ)
CIK:        0002035989
Form:       8-K
Filed at:   2026-09-11T20:15:50+00:00
Accession:  0001140361-26-036349
Event type: leadership
Sentiment:  neutral
Materiality: 0.60
Item codes: 5.02, 7.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Amrize names Mario Gross President of Building Envelope; Gosa resigns
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- Jake Gosa resigns as President, Building Envelope; 12-month notice period runs to Sept 6, 2027.
- Mario Gross appointed President, Building Envelope effective Sept 11, 2026, succeeding Gosa.
- Gross had been Chief Supply Chain Officer since NYSE listing in June 2025; earlier COO of Building Envelope 2024–2025.
- Gosa remains employed during transition; company cites smooth handover and thanks his contributions.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/2035989/000114036126036349/0001140361-26-036349-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/2035989/000114036126036349/ef20081881_8k.htm
  HTML page:      https://secwatch.observer/filing/0001140361-26-036349

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer