Simpson Manufacturing's three largest insider shareholders as of September 09, 2026 are Michael Olosky (President And Ceo, 54.90K shares), Karen Winifred Colonias (President Ceo, 33.92K shares), Brian J Magstadt (Chief Financial Officer, 31.03K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michael Olosky | President And Ceo | 54,896 | 0 | 54,896 | 20.8% | 18 Feb, 2026 |
| 2 | Brian J Magstadt | Chief Financial Officer | 31,034 | 0 | 31,034 | 11.8% | 20 Feb, 2024 |
| 3 | Roger Dankel | Evp, Na Sales | 22,192 | 0 | 22,192 | 8.4% | 12 Dec, 2024 |
| 4 | Gary M Cusumano | Director | 18,714 | 0 | 18,714 | 7.1% | 02 May, 2024 |
| 5 | Jennifer Chatman | Director | 14,638 | 0 | 14,638 | 5.6% | 13 Feb, 2024 |
| 6 | Karen Winifred Colonias | Chief Executive Officer | 14,623 | 0 | 14,623 | 5.5% | 27 Apr, 2023 |
| 7 | Celeste Volz Ford | Director | 14,112 | 0 | 14,112 | 5.4% | 08 May, 2026 |
| 8 | Greenway Robin Macgillivray | Director | 14,097 | 0 | 14,097 | 5.4% | 27 Apr, 2023 |
| 9 | Michael Andersen | Evp, Europe | 12,417 | 0 | 12,417 | 4.7% | 18 Feb, 2026 |
| 10 | Jeremy Gilstrap | Evp, Innovation | 10,900 | 0 | 10,900 | 4.1% | 18 Feb, 2026 |
| 11 | Phillip Burton | Evp, North America | 9,907 | 0 | 9,907 | 3.8% | 18 Feb, 2026 |
| 12 | Kevin Lee Swartzendruber | Senior Vp Of Finance | 7,192 | 0 | 7,192 | 2.7% | 20 Feb, 2024 |
| 13 | Philip E Donaldson | Director | 7,015 | 0 | 7,015 | 2.7% | 08 May, 2026 |
| 14 | Udit Mehta | Chief Technology Officer | 4,990 | 0 | 4,990 | 1.9% | 18 Feb, 2026 |
| 15 | Kenneth D. Knight | Director | 4,775 | 0 | 4,775 | 1.8% | 08 May, 2026 |
| 16 | Cassandra Payton | Evp, General Counsel | 4,688 | 0 | 4,688 | 1.8% | 18 Feb, 2026 |
| 17 | Matt Dunn | Chief Financial Officer | 4,687 | 0 | 4,687 | 1.8% | 18 Feb, 2026 |
| 18 | Jennifer Lutz | Evp, Human Resources | 4,047 | 0 | 4,047 | 1.5% | 05 May, 2025 |
| 19 | Chau Banks | Director | 3,019 | 0 | 3,019 | 1.1% | 08 May, 2026 |
| 20 | Felica Coney | Director | 3,019 | 0 | 3,019 | 1.1% | 08 May, 2026 |
| 21 | Angela C Drake | Director | 1,691 | 0 | 1,691 | 0.6% | 08 May, 2026 |
| 22 | Nozomi Bullock | Evp, Human Resources | 773 | 0 | 773 | 0.3% | 29 Jan, 2026 |
| 23 | James S Andrasick | Director | 61 | 0 | 61 | 0.0% | 05 Aug, 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Aug, 2026 | Nozomi Bullock | Evp, Human Resources | Disposed I | 22 | $189.84 | $4.14K | 0 | Indirect |
| 04 Aug, 2026 | James S Andrasick | Director | Disposed S | 800 | $195.62 | $156.50K | 61 | Direct |
| 06 May, 2026 | Chau Banks | Director | Acquired A | 678 | $0.00 | $0 | 3,019 | Direct |
| 06 May, 2026 | Felica Coney | Director | Acquired A | 678 | $0.00 | $0 | 3,019 | Direct |
| 06 May, 2026 | Celeste Volz Ford | Director | Acquired A | 678 | $0.00 | $0 | 14,112 | Direct |
| 06 May, 2026 | James S Andrasick | Director | Acquired A | 678 | $0.00 | $0 | 861 | Direct |
| 06 May, 2026 | Angela C Drake | Director | Acquired A | 678 | $0.00 | $0 | 1,691 | Direct |
| 06 May, 2026 | Philip E Donaldson | Director | Acquired A | 929 | $0.00 | $0 | 7,015 | Direct |
| 06 May, 2026 | Kenneth D. Knight | Director | Acquired A | 678 | $0.00 | $0 | 4,775 | Direct |
| 17 Feb, 2026 | Cassandra Payton | Evp, General Counsel | Acquired A | 963 | $0.00 | $0 | 5,437 | Direct |
| 17 Feb, 2026 | Michael Andersen | Evp, Europe | Acquired A | 3,624 | $0.00 | $0 | 12,417 | Direct |
| 17 Feb, 2026 | Michael Olosky | President And Ceo | Acquired A | 17,140 | $0.00 | $0 | 56,478 | Direct |
| 17 Feb, 2026 | Jeremy Gilstrap | Evp, Innovation | Acquired A | 2,449 | $0.00 | $0 | 11,318 | Direct |
| 17 Feb, 2026 | Matt Dunn | Chief Financial Officer | Disposed F | 185 | $209.01 | $38.67K | 4,687 | Direct |
| 17 Feb, 2026 | Phillip Burton | Evp, North America | Acquired A | 3,248 | $0.00 | $0 | 10,251 | Direct |
| 17 Feb, 2026 | Udit Mehta | Chief Technology Officer | Disposed F | 386 | $209.01 | $80.68K | 4,990 | Direct |
| 17 Feb, 2026 | Cassandra Payton | Evp, General Counsel | Disposed F | 749 | $209.01 | $156.55K | 4,688 | Direct |
| 17 Feb, 2026 | Jeremy Gilstrap | Evp, Innovation | Disposed F | 418 | $209.01 | $87.37K | 10,900 | Direct |
| 17 Feb, 2026 | Michael Olosky | President And Ceo | Disposed F | 1,582 | $209.01 | $330.65K | 54,896 | Direct |
| 17 Feb, 2026 | Phillip Burton | Evp, North America | Disposed F | 344 | $209.01 | $71.90K | 9,907 | Direct |