Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Mark Griffith 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.
- Ernst W. Bruderer - $165K in COSO purchases and sales in the last 12 months
- Anthony P. Valduga - $118K in COSO purchases and sales in the last 12 months
- Michael B. High - $38K in COSO purchases and sales in the last 12 months
- James S. Macleod - $9K in COSO purchases and sales in the last 12 months
- Stephen R. Stone - $5K in COSO purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is Mark Griffith?
Mark Griffith is a corporate insider of CoastalSouth Bancshares, Inc. (COSO). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Mark Griffith last file a Form 4?
The only primary Form 4 on record is dated 13 February 2026.