COSO's three largest insider shareholders as of September 29, 2026 are James S Macleod (Director, 201.59K shares), Stephen R. Stone (President And Ceo, 132.36K shares), James N. Jr. Richardson (Director, 128.89K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | James S Macleod | Director | 201,585 | 0 | 201,585 | 23.6% | 14 Sep, 2026 |
| 2 | Stephen R. Stone | President And Ceo | 132,363 | 0 | 132,363 | 15.5% | 29 Apr, 2026 |
| 3 | James N. Jr. Richardson | Director | 128,891 | 0 | 128,891 | 15.1% | 07 Jul, 2025 |
| 4 | Joseph V. Jr. Topper | Director | 107,900 | 0 | 107,900 | 12.6% | 07 Jul, 2025 |
| 5 | Anthony P. Valduga | Cfo And Coo | 84,115 | 0 | 84,115 | 9.9% | 06 May, 2026 |
| 6 | Patrick M Frawley | Director | 83,549 | 0 | 83,549 | 9.8% | 07 Jul, 2025 |
| 7 | Ernst W. Bruderer | Director | 41,131 | 0 | 41,131 | 4.8% | 31 Aug, 2026 |
| 8 | Boris Gutin | Director | 18,284 | 0 | 18,284 | 2.1% | 07 Jul, 2025 |
| 9 | John G Jr Aldridge | Director | 18,129 | 0 | 18,129 | 2.1% | 07 Jul, 2025 |
| 10 | L. Scott Askins | Director | 13,990 | 0 | 13,990 | 1.6% | 07 Jul, 2025 |
| 11 | Lauren M. Hemby | Chief Accounting Officer | 13,069 | 0 | 13,069 | 1.5% | 29 Apr, 2026 |
| 12 | Cameron Bradley Turner | Chief Credit Officer | 8,831 | 0 | 8,831 | 1.0% | 29 Apr, 2026 |
| 13 | Michael B High | Director | 0 | 1,500 | 1,500 | 0.2% | 12 Feb, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 31 Aug, 2026 | Ernst W. Bruderer | Director | Disposed S | 2,000 | $27.43 | $54.86K | 41,131 | Direct |
| 26 Aug, 2026 | Ernst W. Bruderer | Director | Disposed S | 2,000 | $27.50 | $55.00K | 43,131 | Direct |
| 18 Aug, 2026 | Ernst W. Bruderer | Director | Disposed S | 1,000 | $27.89 | $27.89K | 45,131 | Direct |
| 12 Aug, 2026 | Ernst W. Bruderer | Director | Disposed S | 1,000 | $27.56 | $27.56K | 46,131 | Direct |
| 06 May, 2026 | Anthony P. Valduga | Cfo And Coo | Disposed S | 4,558 | $25.84 | $117.78K | 86,115 | Direct |
| 06 May, 2026 | Anthony P. Valduga | Cfo And Coo | Disposed G | 2,000 | $0.00 | $0 | 84,115 | Direct |
| 27 Apr, 2026 | Lauren M. Hemby | Chief Accounting Officer | Acquired M | 4,000 | $0.00 | $0 | 14,250 | Direct |
| 27 Apr, 2026 | Anthony P. Valduga | Cfo And Coo | Acquired M | 13,000 | $0.00 | $0 | 94,514 | Direct |
| 27 Apr, 2026 | Stephen R. Stone | President And Ceo | Acquired M | 17,000 | $0.00 | $0 | 137,385 | Direct |
| 27 Apr, 2026 | Cameron Bradley Turner | Chief Credit Officer | Acquired M | 4,000 | $0.00 | $0 | 10,000 | Direct |
| 27 Apr, 2026 | Stephen R. Stone | President And Ceo | Disposed F | 5,022 | $25.59 | $128.51K | 132,363 | Direct |
| 27 Apr, 2026 | Anthony P. Valduga | Cfo And Coo | Disposed F | 3,841 | $25.59 | $98.29K | 90,673 | Direct |
| 27 Apr, 2026 | Lauren M. Hemby | Chief Accounting Officer | Disposed F | 1,181 | $25.59 | $30.22K | 13,069 | Direct |
| 27 Apr, 2026 | Cameron Bradley Turner | Chief Credit Officer | Disposed F | 1,169 | $25.59 | $29.91K | 8,831 | Direct |
| 27 Apr, 2026 | Lauren M. Hemby | Chief Accounting Officer | Disposed M | 4,000 | — | — | 0 | Direct |
| 27 Apr, 2026 | Stephen R. Stone | President And Ceo | Disposed M | 17,000 | — | — | 0 | Direct |
| 27 Apr, 2026 | Cameron Bradley Turner | Chief Credit Officer | Disposed M | 4,000 | — | — | 0 | Direct |
| 27 Apr, 2026 | Anthony P. Valduga | Cfo And Coo | Disposed M | 13,000 | — | — | 0 | Direct |
| 09 Mar, 2026 | Stephen R. Stone | President And Ceo | Acquired P | 200 | $24.15 | $4.83K | 120,385 | Direct |
| 11 Feb, 2026 | Anthony P. Valduga | Cfo And Coo | Acquired A | 10,000 | — | — | 10,000 | Direct |