Summary
Updated Aug 30, 2026
Mark W. Drennan is Regional President, NTX of SOUTHSIDE BANCSHARES INC (SBSI). 4 SEC Form 4 filings on record, most recently on 10 December 2024.
Recent Transactions
6Every recent SEC Form 4 transaction Mark W. Drennan has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Mark W. Drennan go back to 2024: 4 primary Form 4 filings, an average of 1.3 per year. 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 Mark W. Drennan 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.
- John Mitchell Craddock Jr. - $16K of SBSI open-market activity in the last 12 months
- Kirk A. Calhoun - $10K of SBSI 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 Mark W. Drennan?
Mark W. Drennan is a corporate insider, tracked as Regional President, NTX of SOUTHSIDE BANCSHARES INC (SBSI). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Mark W. Drennan last file a Form 4?
The most recent primary Form 4 on record is dated 10 December 2024, one of 4 filings going back to 2024.
Where can I see all of Mark W. Drennan'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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