John Sakys is CFO at MESA LABORATORIES INC /CO/ (MLAB). They have made 25 open-market trades across 1 company since 2016, most recently 2026-06-22.
CIK 0001197710
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 25 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MLAB | 19,785 | $2.5M |
| ISON | 4,024 | — |
| Total | $2.5M |
Shares reported on the most recent Form 4, priced at the 2026-06-23 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MLAB | SELL · 10b5-1 | 2026-06-22 | 2026-06-23 | $89.50 | $253K | +9.1% | +7.2% | +39.2% |
| MLAB | SELL | 2026-06-16 | 2026-06-17 | $101.27 | $124K | +3.4% | +0.9% | +32.1% |
| MLAB | SELL | 2025-06-16 | 2025-06-18 | $97.12 | $125K | +3.6% | -25.7% | -31.1% |
| MLAB | SELL | 2023-03-22 | 2023-03-27 | $169.01 | $973K | +2.5% | -6.0% | -25.6% |
| MLAB | SELL | 2023-03-15 | 2023-03-16 | $165.71 | $166K | +0.2% | +1.0% | -19.1% |
| MLAB | SELL | 2023-03-09 | 2023-03-09 | $169.97 | $68K | +1.7% | +4.3% | -19.8% |
| MLAB | SELL | 2023-02-09 | 2023-02-09 | $184.27 | $184K | -3.3% | -6.2% | -10.0% |
| MLAB | SELL | 2023-01-23 | 2023-01-25 | $210.19 | $441K | -4.5% | -9.3% | -12.3% |
| MLAB | SELL | 2022-08-15 | 2022-08-17 | $200.57 | $802K | -11.8% | -22.4% | -4.6% |
| MLAB | SELL | 2022-06-21 | 2022-06-22 | $188.22 | $272K | +7.0% | +6.7% | -23.1% |
| MLAB | SELL · 10b5-1 | 2022-04-20 | 2022-04-22 | $250.44 | $18K | -0.0% | -8.8% | -10.3% |
| MLAB | SELL | 2022-03-23 | 2022-03-25 | $251.23 | $804K | -0.1% | -7.4% | -21.1% |
| MLAB | SELL | 2021-12-10 | 2021-12-10 | $324.74 | $1.1M | +1.7% | -5.4% | -21.8% |
| MLAB | SELL | 2021-11-11 | 2021-11-12 | $317.12 | $317K | +0.7% | +4.7% | -15.7% |
| MLAB | SELL | 2021-10-20 | 2021-10-25 | $309.86 | $620K | +3.3% | +4.2% | -0.5% |
| MLAB | SELL | 2021-09-10 | 2021-09-10 | $270.21 | $378K | +17.1% | +12.5% | +20.5% |
| MLAB | SELL | 2021-08-12 | 2021-08-13 | $275.16 | $275K | -2.1% | +2.0% | +14.5% |
| MLAB | SELL | 2021-07-12 | 2021-07-13 | $278.77 | $279K | -1.6% | -3.7% | +5.4% |
| MLAB | SELL | 2021-07-01 | 2021-07-06 | $267.04 | $267K | +2.9% | +5.7% | +9.1% |
| MLAB | SELL | 2021-06-16 | 2021-06-17 | $255.67 | $1.1M | +2.8% | +7.4% | +13.8% |
| MLAB | SELL | 2021-03-12 | 2021-03-15 | $263.84 | $1.3M | -8.7% | -3.9% | -1.2% |
| MLAB | SELL · 10b5-1 | 2021-01-06 | 2021-01-07 | $290.00 | $5K | +1.0% | -2.5% | -17.9% |
| MLAB | SELL | 2020-11-17 | 2020-11-18 | $290.00 | $285K | -2.1% | +0.6% | -1.9% |
| MLAB | SELL | 2020-10-08 | 2020-10-09 | $276.90 | $522K | -4.7% | -6.3% | +2.3% |
| MLAB | SELL | 2020-09-01 | 2020-09-04 | $251.17 | $427K | +3.2% | +8.4% | +11.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.