COSO insider buying and SEC filings, explained
CoastalSouth Bancshares, Inc. · CIK 1297107
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$38K
Insiders who bought
1
Sold (not marked 10b5-1)
$423K
Planned sales (10b5-1)
$28K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 23, 2026 | Sale | Ernst W. Bruderer (Director) sold 6,000 shares at $27.92 ($167K). Holdings down 15% to 35,131 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Oct 26, 2026, 9:16 AM ET |
| Aug 6–7, 2026 | Purchase (code P) | James S. Macleod (Director) bought 334 shares between Aug 6 and Aug 7 at about $27.99 ($9K), reported as a purchase (code P). Holdings up <1% to 201,585 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 14, 2026 |
| Aug 31, 2026 | Sale | Ernst W. Bruderer (Director) sold 2,000 shares at $27.43 ($55K). Holdings down 5% to 41,131 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 31, 2026 |
| Aug 26, 2026 | Sale | Ernst W. Bruderer (Director) sold 2,000 shares at $27.50 ($55K). Holdings down 4% to 43,131 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 26, 2026 |
| Aug 18, 2026 | Sale | Ernst W. Bruderer (Director) sold 1,000 shares at $27.89 ($28K). Holdings down 2% to 45,131 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 18, 2026 |
| Aug 12, 2026 | Planned (10b5-1) | Ernst W. Bruderer (Director) sold 1,000 shares at $27.56 ($28K), marked as a 10b5-1 plan trade. Holdings down 2% to 46,131 shares. | SEC filing Filed Aug 13, 2026 |
| May 6, 2026 | Sale | Anthony P. Valduga (CFO) sold 4,558 shares at $25.84 ($118K). Holdings down 5% to 86,115 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 6, 2026 |
| Mar 9, 2026 | Purchase (code P) | Stephen R. Stone (CEO and Director) bought 200 shares at $24.15 ($5K), reported as a purchase (code P). Holdings up <1% to 120,385 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 9, 2026 |
| Feb 10, 2026 | Purchase (code P) | Michael B. High (Director) bought 1,500 shares indirectly (by retirement or benefit plan) at $25.14 ($38K), reported as a purchase (code P). New position of 1,500 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 12, 2026 |
18 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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