Based on data from the past 90 days ending February 19, 2026, Mesa Laboratories's three largest insider shareholders are Director John Bradley Schmieder (82.12K shares), Director John James Sullivan (70.06K shares), President And Ceo Gary M Owens (64.14K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| John Bradley Schmieder | 82,120 | 19 Sep, 2023 | |
| John James Sullivan | 70,062 | 05 Dec, 2025 | |
| Gary M Owens | President And Ceo | 64,135 | 28 Oct, 2025 |
| Laboratories Inc /Co/ Mesa | 29,788 | 16 Jun, 2022 | |
| Evan Guillemin | 29,207 | 02 Sep, 2022 | |
| John Sakys | Cfo | 15,044 | 25 Jun, 2025 |
| Shiraz Shabanali Ladiwala | 5,023 | 18 Aug, 2025 | |
| Jennifer Sadie Alltoft | 4,878 | 18 Aug, 2025 | |
| Shannon Hall | 4,189 | 18 Aug, 2025 | |
| R Tony Tripeny | 4,083 | 18 Aug, 2025 | |
| Gregory Dinoia | Svp Commercial | 3,634 | 22 Jun, 2022 |
| David M Kelly | 2,600 | 09 Nov, 2021 | |
| Brian David Archbold | Svp Operations | 2,407 | 25 Jun, 2025 |
| Mark Christopher Capone | 2,128 | 18 Aug, 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 |
|---|---|---|---|---|---|---|---|---|
| 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 |
| 15 Aug, 2025 | John James Sullivan | Common Stock | A | 1,404 | $0.00 | 27,282 | D | M |
| 15 Aug, 2025 | R Tony Tripeny | Common Stock | A | 1,404 | $0.00 | 4,083 | D | M |
| 15 Aug, 2025 | Mark Christopher Capone | Common Stock | A | 1,404 | $0.00 | 2,128 | D | M |
| 15 Aug, 2025 | Shannon Hall | Common Stock | A | 1,404 | $0.00 | 4,189 | D | M |
| 15 Aug, 2025 | Shiraz Shabanali Ladiwala | - | - | 5,023 | D | |||
| 15 Aug, 2025 | Shiraz Shabanali Ladiwala | Common Stock | A | 1,949 | $0.00 | 5,023 | D | M |
| 15 Aug, 2025 | Jennifer Sadie Alltoft | Common Stock | A | 1,404 | $0.00 | 4,878 | D | M |
| 21 Jun, 2025 | John Sakys | Common Stock | D | 454 | $95.82 | 15,044 | D | F |
| 21 Jun, 2025 | John Sakys | Common Stock | A | 1,036 | $95.82 | 15,498 | D | M |
| 21 Jun, 2025 | Gary M Owens | Common Stock | A | 3,301 | $95.82 | 54,022 | D | M |
| 21 Jun, 2025 | Gary M Owens | Common Stock | D | 1,445 | $95.82 | 52,577 | D | F |
| 21 Jun, 2025 | Brian David Archbold | Common Stock | A | 844 | $95.82 | 2,792 | D | M |
| 21 Jun, 2025 | Brian David Archbold | Common Stock | D | 385 | $95.82 | 2,407 | D | F |
| 21 Jun, 2025 | Brian David Archbold | - | - | 2,407 | D | |||
| 18 Jun, 2025 | John Sakys | Common Stock | A | 2,840 | $92.99 | 15,705 | D | M |
| 18 Jun, 2025 | John Sakys | Common Stock | D | 1,243 | $92.99 | 14,462 | D | F |
| 18 Jun, 2025 | Gary M Owens | Common Stock | D | 3,810 | $92.99 | 50,721 | D | F |
| 18 Jun, 2025 | Gary M Owens | - | - | 54,531 | D |