Mesa Laboratories's top three insider shareholders as of June 06, 2026 are Gary M Owens (President And Ceo, 64.14K shares), John Bradley Schmieder (Director, 62.76K shares), John James Sullivan (Director, 44.78K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Laboratories Inc /Co/ Mesa | - | 29,788 | 0 | 16 Jun, 2022 |
| David M Kelly | - | 2,600 | 0 | 09 Nov, 2021 |
| John Sakys | Cfo | 15,044 | 0 | 25 Jun, 2025 |
| Evan Guillemin | - | 29,207 | 0 | 02 Sep, 2022 |
| Gregory Dinoia | Svp Commercial | 3,634 | 0 | 22 Jun, 2022 |
| John James Sullivan | - | 0 | 44,780 | 14 Nov, 2023 |
| R Tony Tripeny | - | 5,398 | 0 | 10 Mar, 2026 |
| Mark Christopher Capone | - | 3,429 | 0 | 10 Mar, 2026 |
| Shannon Hall | - | 4,189 | 0 | 18 Aug, 2025 |
| John Bradley Schmieder | - | 62,760 | 0 | 19 Sep, 2023 |
| Gary M Owens | President And Ceo | 64,135 | 0 | 28 Oct, 2025 |
| Shiraz Shabanali Ladiwala | - | 8,523 | 0 | 10 Mar, 2026 |
| Jennifer Sadie Alltoft | - | 4,878 | 0 | 18 Aug, 2025 |
| Brian David Archbold | Svp Operations | 2,407 | 0 | 25 Jun, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 14 Apr, 2026 | Siddhartha Kadia | Restricted Stock Units - 1 | A | 34,807 | $0.00 | 34,807 | D | A |
| 31 Mar, 2026 | Gary M Owens | Restricted Stock Unit - 10 | D | 8,211 | $0.00 | 16,448 | D | D |
| 31 Mar, 2026 | Gary M Owens | Restricted Stock Unit - 10 | D | 8,211 | $0.00 | 16,448 | D | D |
| 31 Mar, 2026 | Gary M Owens | Restricted Stock Unit - 10 | D | 8,211 | $0.00 | 16,448 | D | D |
| 10 Mar, 2026 | R Tony Tripeny | Common Stock | A | 1,315 | $76.00 | 5,398 | D | P |
| 10 Mar, 2026 | Shiraz Shabanali Ladiwala | Common Stock | A | 3,500 | $72.23 | 8,523 | D | P |
| 10 Mar, 2026 | R Tony Tripeny | Common Stock | A | 1,315 | $76.00 | 5,398 | D | P |
| 10 Mar, 2026 | R Tony Tripeny | Common Stock | A | 1,315 | $76.00 | 5,398 | D | P |
| 10 Mar, 2026 | Mark Christopher Capone | Common Stock | A | 1,301 | $76.35 | 3,429 | D | P |
| 02 Dec, 2025 | John James Sullivan | Common Stock | D | 2,000 | $0.00 | 25,282 | D | G |
| 02 Dec, 2025 | John James Sullivan | Common Stock | D | 2,000 | $0.00 | 25,282 | D | G |
| 02 Dec, 2025 | John James Sullivan | Common Stock | D | 2,000 | $0.00 | 25,282 | D | G |
| 27 Oct, 2025 | Gary M Owens | Common Stock | A | 11,558 | $0.00 | 64,135 | D | M |
| 27 Oct, 2025 | Gary M Owens | Common Stock | A | 11,558 | $0.00 | 64,135 | D | M |
| 27 Oct, 2025 | Gary M Owens | Common Stock | A | 11,558 | $0.00 | 64,135 | D | M |
| 15 Aug, 2025 | Mark Christopher Capone | Common Stock | A | 1,404 | $0.00 | 2,128 | D | M |
| 15 Aug, 2025 | R Tony Tripeny | Common Stock | A | 1,404 | $0.00 | 4,083 | D | M |
| 15 Aug, 2025 | R Tony Tripeny | Common Stock | A | 1,404 | $0.00 | 4,083 | D | M |
| 15 Aug, 2025 | Shannon Hall | Common Stock | A | 1,404 | $0.00 | 4,189 | D | M |
| 15 Aug, 2025 | Jennifer Sadie Alltoft | Common Stock | A | 1,404 | $0.00 | 4,878 | D | M |