Insiders who reported open-market trades in the last 12 months at the companies John Smollen files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Thomas P. Gallagher - $32.30M in MIAX purchases and sales in the last 12 months
John Smollen is a corporate insider, tracked as EVP, New Product Development of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did John Smollen last file a Form 4?
The most recent primary Form 4 on record is dated 18 June 2026, one of 5 filings going back to 2025.
Has John Smollen been buying or selling stock?
Recorded transactions: 1 open-market purchase ($115K) and 0 open-market sales across all tracked filings.
John Smollen is EVP, New Product Development of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX). 5 SEC Form 4 filings on record going back to 2025, most recently on 18 June 2026. Most recent open-market trade: bought $115K of MIAX on 15 August 2025. Lifetime open-market purchases: $115K.
Recent transactions
8
The latest 8 SEC Form 4 transactions reported by John Smollen.
InsiderAlpha's records for John Smollen go back to 2025: 5 primary Form 4 filings, an average of 2.5 per year. The typical open-market purchase is $115K (1 buy totaling $115K). The largest single buy on record is $115K of MIAX in 2025. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
