Form 4 for MLAB MESA LABORATORIES INC /CO/
Accepted 2026-06-23 12:23:10 ET · period of report 2026-06-18 · accession 0000724004-26-000063 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-06-23 12:23 | 2026-06-18 | MLAB | Sakys John | CFO | M - OptEx | $95.10 | +3,792 | 20.3K | +23% | +$360.6K |
| D | 2026-06-23 12:23 | 2026-06-18 | MLAB | Sakys John | CFO | A - Grant | $95.10 | +2,282 | 22.6K | +11% | +$217.0K |
| D | 2026-06-23 12:23 | 2026-06-22 | MLAB | Sakys John | CFO | S - Sale+OE | $89.50 | -2,827 | 19.8K | -13% | -$253.0K |
| DM | 2026-06-23 12:23 | 2026-06-18 | MLAB | Sakys John | CFO | M - OptEx | $0.00 | -3,792 | 2,755 | -58% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-06-18 | M | A | 1,036 | $95.10 | 17,574 | D | — | — | |
| 2 | Common | Common Stock | 2026-06-18 | M | A | 2,756 | $95.10 | 20,330 | D | — | — | |
| 3 | Common | Common Stock | 2026-06-18 | A | A | 2,282 | $95.10 | 22,612 | D | — | — | (F5) Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program |
| 4 | Common | Common Stock | 2026-06-22 | S | D | 2,827 | $89.50 | 19,785 | D | — | — | (F6) Shares sold to cover taxes related to the vesting of RSUs and PSUs on June 18, 2026. Transaction was executed under a 10b5-1 plan. |
| 5 | Derivative | Restricted Stock Units - 6 | 2026-06-18 | M | D | 1,036 | $0.00 | 0 | D | — · 2024-06-21 to — | 1,036 Common Stock | (F1) Each RSU represents a contingent right to receive one share of the Issuer's common stock. (F2) RSUs that vested June 21, 2024 and each of the next two anniversary dates (F3) Not Applicable |
| 6 | Derivative | Restricted Stock Units - 7 | 2026-06-18 | M | D | 2,756 | $0.00 | 2,755 | D | — · 2025-06-18 to — | 2,756 Common Stock | (F1) Each RSU represents a contingent right to receive one share of the Issuer's common stock. (F4) RSUs that vest 1/3 on June 15, 2026 and each of the next 2 anniversary dates (F3) Not Applicable |