As of September 17, 2026, Mister Car Wash's top three insider holders are John Lo-Minn Lai (Chief Executive Officer, 1.87Mn shares), John Lo-Minn Lai (Chief Executive Officer, 960.00K shares), Mayra Idali Chimienti (Chief Operating Officer, 340.00K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | John Lo-Minn Lai | Chief Executive Officer | 0 | 1,868,191 | 1,868,191 | 82.8% | 13 May, 2024 |
| 2 | Mayra Idali Chimienti | Chief Operating Officer | 339,999 | 0 | 339,999 | 15.1% | 27 Jun, 2024 |
| 3 | Lisa Bossard Funk | General Counsel | 23,198 | 0 | 23,198 | 1.0% | 30 Jun, 2022 |
| 4 | Markus Hartmann | General Counsel | 15,098 | 0 | 15,098 | 0.7% | 10 Feb, 2025 |
| 5 | Susan E Docherty | Director | 8,591 | 0 | 8,591 | 0.4% | 27 May, 2022 |
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 |
|---|---|---|---|---|---|---|---|---|
| 19 May, 2026 | John G Danhakl | Director, TenPercentOwner | Disposed J | 219,213,079 | $7.00 | $1.53Bn | 0 | Indirect |
| 19 May, 2026 | Jedidiah Marc Gold | Chief Financial Officer | Acquired M | 133,485 | — | — | 219,564 | Direct |
| 19 May, 2026 | Veronica Rogers | Director | Acquired M | 14,144 | — | — | 42,024 | Direct |
| 19 May, 2026 | Jodi Taylor | Director | Acquired M | 14,144 | — | — | 51,076 | Direct |
| 19 May, 2026 | Jonathan A Seiffer | Director, TenPercentOwner | Disposed J | 219,213,079 | $7.00 | $1.53Bn | 0 | Indirect |
| 19 May, 2026 | Jeffrey Suer | Director, TenPercentOwner | Disposed J | 219,213,079 | $7.00 | $1.53Bn | 0 | Indirect |
| 19 May, 2026 | Atif Rafiq | Director | Acquired M | 14,144 | — | — | 32,031 | Direct |
| 19 May, 2026 | Chavez Carlos | Chief Technology Officer | Acquired M | 17,655 | — | — | 17,655 | Direct |
| 19 May, 2026 | Ronald Kirk | Director | Acquired M | 14,144 | — | — | 53,479 | Direct |
| 19 May, 2026 | Equity Investors Vi, L.P. Green | Director, TenPercentOwner | Disposed J | 134,812,845 | $7.00 | $943.69Mn | 0 | Direct |
| 19 May, 2026 | John G Danhakl | Director, TenPercentOwner | Disposed J | 219,213,079 | $7.00 | $1.53Bn | 0 | Indirect |
| 19 May, 2026 | John Kristofer Galashan | Director, TenPercentOwner | Disposed J | 219,213,079 | $7.00 | $1.53Bn | 0 | Indirect |
| 19 May, 2026 | John Kristofer Galashan | Director, TenPercentOwner | Disposed J | 219,213,079 | $7.00 | $1.53Bn | 0 | Indirect |
| 19 May, 2026 | Jeffrey Suer | Director, TenPercentOwner | Disposed J | 219,213,079 | $7.00 | $1.53Bn | 0 | Indirect |
| 19 May, 2026 | Jonathan A Seiffer | Director, TenPercentOwner | Disposed J | 219,213,079 | $7.00 | $1.53Bn | 0 | Indirect |
| 19 May, 2026 | Dorvin D Lively | Director | Acquired M | 14,144 | — | — | 156,281 | Direct |
| 19 May, 2026 | Equity Investors Vi, L.P. Green | Director, TenPercentOwner | Disposed J | 134,812,845 | $7.00 | $943.69Mn | 0 | Direct |
| 19 May, 2026 | John Lo-Minn Lai | Chief Executive Officer | Acquired M | 633,230 | — | — | 5,270,624 | Direct |
| 19 May, 2026 | Mary Lyn Porter | Chief People Officer | Acquired M | 39,747 | — | — | 66,828 | Direct |
| 19 May, 2026 | Joseph Duane Matheny | Chief Innovation Officer | Acquired M | 39,577 | — | — | 133,404 | Direct |