Form 4 for MLAB MESA LABORATORIES INC /CO/
Accepted 2026-06-23 13:34:00 ET · period of report 2026-06-18 · accession 0000724004-26-000065 · 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 13:34 | 2026-06-18 | MLAB | Crennen Lyndsey Elizabeth | CAO | M - OptEx | $95.10 | +726 | 2,199 | +49% | +$69.0K |
| D | 2026-06-23 13:34 | 2026-06-18 | MLAB | Crennen Lyndsey Elizabeth | CAO | A - Grant | $95.10 | +263 | 2,462 | +12% | +$25.0K |
| D | 2026-06-23 13:34 | 2026-06-22 | MLAB | Crennen Lyndsey Elizabeth | CAO | S - Sale+OE | $89.50 | -442 | 2,020 | -18% | -$39.6K |
| DM | 2026-06-23 13:34 | 2026-06-18 | MLAB | Crennen Lyndsey Elizabeth | CAO | M - OptEx | $0.00 | -726 | 367 | -66% | $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 | 125 | $95.10 | 1,598 | D | — | — | |
| 2 | Common | Common Stock | 2026-06-18 | M | A | 233 | $95.10 | 1,831 | D | — | — | |
| 3 | Common | Common Stock | 2026-06-18 | M | A | 368 | $95.10 | 2,199 | D | — | — | |
| 4 | Common | Common Stock | 2026-06-18 | A | A | 263 | $95.10 | 2,462 | D | — | — | (F6) Shares represent common stock of Mesa Labs issued upon release of performance share units issued under the FY24-FY26 performance share unit program |
| 5 | Common | Common Stock | 2026-06-22 | S | D | 442 | $89.50 | 2,020 | D | — | — | (F7) Shares sold to cover taxes related to the vesting of RSUs and PSUs on June 18, 2026. Transaction was executed under a 10b-1 plan. |
| 6 | Derivative | Restricted Stock Unit - 1 | 2026-06-18 | M | D | 125 | $0.00 | 0 | D | — · 2024-06-21 to — | 125 Common Stock | (F1) Each RSU represents a contingent right to receive one share of the Issuer's common stock (F2) RSUs that vested 1/3 on June 21, 2024 and each of the next two anniversary dates (F3) Not Applicable |
| 7 | Derivative | Restricted Stock Units - 2 | 2026-06-18 | M | D | 233 | $0.00 | 232 | D | — · 2025-06-18 to — | 233 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 18, 2025 and each of the next two anniversary dates (F3) Not Applicable |
| 8 | Derivative | Restricted Stock Units - 3 | 2026-06-18 | M | D | 368 | $0.00 | 367 | D | — · 2025-06-19 to — | 368 Common Stock | (F1) Each RSU represents a contingent right to receive one share of the Issuer's common stock (F5) RSUs that vest 1/3 on June 19, 2025 and each of the next 2 anniversary dates (F3) Not Applicable |