Insiders who reported open-market trades in the last 12 months at the companies Thomas R. Stanton 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.
Christoph Glingener - $2.22M in ADTN purchases and sales in the last 12 months
Thomas R. Stanton is a corporate insider, tracked as Chairman & CEO of ADTRAN Holdings, Inc. (ADTN). InsiderAlpha holds 11 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Thomas R. Stanton last file a Form 4?
The most recent primary Form 4 on record is dated 3 April 2026, one of 11 filings going back to 2024.
Has Thomas R. Stanton been buying or selling stock?
Recorded transactions: 1 open-market purchase ($300K) and 0 open-market sales across all tracked filings.
Thomas R. Stanton is Chairman & CEO of ADTRAN Holdings, Inc. (ADTN). 11 SEC Form 4 filings on record going back to 2024, most recently on 3 April 2026. Most recent open-market trade: bought $300K of ADTN on 25 November 2025. Lifetime open-market purchases: $300K.
Recent transactions
14
The latest 14 SEC Form 4 transactions reported by Thomas R. Stanton.
InsiderAlpha's records for Thomas R. Stanton go back to 2024: 11 primary Form 4 filings, an average of 3.7 per year. The typical open-market purchase is $300K (1 buy totaling $300K). The largest single buy on record is $300K of ADTN 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.
