Mario Gross, Chief Supply Chain Officer at Amrize, bought AMRZ on Aug 11, 2026

Data as of Oct 16

▲ BUY$149K3,200 shares at $46.62Mario Gross Chief Supply Chain OfficerAMRZ Amrize Ltd

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Traded: Aug 11, 2026
Disclosed: Aug 13, 2026
Filed: 2 days after the trade

Form 4s are due within two business days.

Official filing (SEC Form 4) ↗

The price around the disclosure

AMRZSimilar stocks (XLB — its sector index fund), rebased to AMRZ's price on the disclosure day

AMRZ since disclosure

−19.1%

Similar stocks (XLB) since disclosure

−2.7%

XLB — its sector index fund

Change in closing price from Aug 13, 2026 (the first trading day on or after disclosure) to Oct 16, 2026. Dividends excluded. Not a return anyone earned.

Our take

⚪ CFO buys $25K+ of own stock — fired on this disclosure day
Not enough evidence · In past tests: 3.6 percentage points better than similar stocks over 3 months · 2,178 tries
⚪ CFO buys $25K+ of own liquid stock — fired on this disclosure day
Not enough evidence · In past tests: 2.0 percentage points better than similar stocks over 3 months · 1,426 tries

What this rule is doing with AMRZ right now

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Other trades in the same filing

▲ BUYMario Gross Chief Supply Chain OfficerAMRZ Amrize Ltd$17.1Kdisclosed Aug 13 · filed 2 days after the trade

See every trade on AMRZ →