Biggest Insider Buys: September 2025

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

In September 2025, 6 open-market insider purchases of $50K or more were disclosed across 4 companies in SEC Form 4 filings, totaling $24.8M. The largest single purchase was $12.0M by Heron Patrick J at MBX Biosciences, Inc. (MBX).

← All monthly rankings

Largest purchases · September 2025

Source
MBXPurchase$12.0MSep 30SEC ↗
GGZ.EPurchase$10.5MSep 30SEC ↗
OPENPurchase$2.0MSep 30SEC ↗
STRRPurchase$131KSep 17SEC ↗
STRRPurchase$113KSep 17SEC ↗
STRRPurchase$100KSep 17SEC ↗