Gross Mario — SEC Form 4 Insider Trading Activity

Summary

Updated Jul 16, 2026

Gross Mario has filed 1 SEC Form 4 filing across 1 company in the last 90 days — buying. Lifetime open-market purchases: $880K. Historical track record: 5/5 stars across 5 tracked purchases.

Track Record

InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.

InsiderAlpha rating★★★★★ (5/5)
Total purchases tracked5
Purchases with forward-return data5
30-day win rate10000%
90-day win rate4000%
Avg 5-day return+189.07%
Avg 30-day return+987.70%
Avg 90-day return-158.95%
Best 30-day return+1552.34%

Recent Transactions

DateTickerCompanyCodeSharesPriceValue
2026-05-21AMRZAmrize LtdP — Open-market purchase1.2K$48.63$58K
2026-05-21AMRZAmrize LtdP — Open-market purchase1.0K$48.63$49K
2026-05-21AMRZAmrize LtdP — Open-market purchase1.8K$49.47$89K
2026-03-16AMRZAmrize LtdP — Open-market purchase1.2K$55.13$66K
2026-03-16AMRZAmrize LtdP — Open-market purchase2.0K$55.39$111K
2026-03-03AMRZAmrize LtdA — Grant or award4.3K$0.00
2025-08-13AMRZAmrize LtdP — Open-market purchase3.0K$49.63$149K
2025-08-08AMRZAmrize LtdP — Open-market purchase2.6K$47.75$124K
2025-08-08AMRZAmrize LtdP — Open-market purchase5.0K$46.78$234K

Companies — Last 90 Days

Frequently Asked Questions

Who is Gross Mario?

Gross Mario is a corporate insider — currently tracked as Chief Supply Chain Officer of Amrize Ltd (AMRZ). InsiderAlpha tracks every SEC Form 4 filing in real time.

How many SEC Form 4 filings has Gross Mario submitted recently?

1 primary Form 4 filings in the last 90 days, covering 1 company.

Has Gross Mario been buying or selling stock?

Recorded transactions: 8 open-market purchases ($880K) and 0 open-market sales () across all tracked filings.

How accurate is Gross Mario's historical track record?

Across 5 tracked purchases, Gross Mario averaged +987.7% avg 30-day return with a 10000% 30-day win rate. InsiderAlpha rates the track record at 5/5 stars.

Where can I see all of Gross Mario's SEC filings?

All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.

Learn More

Open the live Gross Mario profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.