Summary
Updated Aug 31, 2026
Timothy P. Santo is SVP of Finance; CFO of ADTRAN Holdings, Inc. (ADTN). 4 SEC Form 4 filings on record going back to 2025, most recently on 7 August 2026. Most recent open-market trade: bought $50K of ADTN on 7 August 2026. Lifetime open-market purchases: $99K.
Recent Transactions
4Every recent SEC Form 4 transaction Timothy P. Santo has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Timothy P. Santo go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $50K (2 buys totaling $99K). The largest single buy on record is $50K of ADTN in 2026. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Timothy P. Santo 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 of ADTN open-market activity in the last 12 months
- Thomas R. Stanton - $300K of ADTN open-market activity in the last 12 months
- Hourigan Rice Jacqueline - $148K of ADTN open-market activity in the last 12 months
- James Denson Wilson Jr. - $137K of ADTN open-market activity in the last 12 months
- Nikos Theodosopoulos - $100K of ADTN open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Timothy P. Santo?
Timothy P. Santo is a corporate insider, tracked as SVP of Finance; CFO of ADTRAN Holdings, Inc. (ADTN). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Timothy P. Santo submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Timothy P. Santo been buying or selling stock?
Recorded transactions: 2 open-market purchases ($99K) and 0 open-market sales across all tracked filings.
Where can I see all of Timothy P. Santo'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.
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