Biggest Insider Buys: August 2025

The largest open-market insider purchases disclosed in SEC Form 4 filings, ranked by dollar value.

In August 2025, 6 open-market insider purchases of $50K or more were disclosed across 3 companies in SEC Form 4 filings, totaling $1.2M. The largest single purchase was $501K by Johnston Ian A at Amrize Ltd (AMRZ).

← All monthly rankings

Largest purchases · August 2025

Source
AMRZPurchase$501KAug 11SEC ↗
AMRZPurchase$259KAug 18SEC ↗
LUMNPurchase$129KAug 15SEC ↗
LUMNPurchase$127KAug 15SEC ↗
PKOHPurchase$84KAug 14SEC ↗
PKOHPurchase$82KAug 14SEC ↗