Form 4 for MLAB MESA LABORATORIES INC /CO/
Accepted 2026-06-23 13:02:33 ET · period of report 2026-06-18 · accession 0000724004-26-000064 · 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 13:02 | 2026-06-18 | MLAB | Archbold Brian David | SVP Ops | M - OptEx | $95.10 | +3,324 | 7,034 | +90% | +$316.1K |
| D | 2026-06-23 13:02 | 2026-06-18 | MLAB | Archbold Brian David | SVP Ops | A - Grant | $95.10 | +1,859 | 8,893 | +26% | +$176.8K |
| D | 2026-06-23 13:02 | 2026-06-22 | MLAB | Archbold Brian David | SVP Ops | S - Sale+OE | $89.50 | -2,516 | 6,377 | -28% | -$225.2K |
| DM | 2026-06-23 13:02 | 2026-06-18 | MLAB | Archbold Brian David | SVP Ops | M - OptEx | $0.00 | -3,324 | 2,480 | -57% | $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 | 844 | $95.10 | 4,554 | D | — | — | |
| 2 | Common | Common Stock | 2026-06-18 | M | A | 2,480 | $95.10 | 7,034 | D | — | — | |
| 3 | Common | Common Stock | 2026-06-18 | A | A | 1,859 | $95.10 | 8,893 | 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 | 2,516 | $89.50 | 6,377 | D | — | — | |
| 5 | Derivative | Restricted Stock Units - 7 | 2026-06-18 | M | D | 844 | $0.00 | 0 | D | — · 2024-06-21 to — | 844 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 - 8 | 2026-06-18 | M | D | 2,480 | $0.00 | 2,480 | D | — · — to 2025-06-18 | 2,480 Common Stock | (F1) Each RSU represents a contingent right to receive one share of the Issuer's common stock (F3) Not Applicable (F4) RSUs that vest 1/3 on June 15, 2026 and each of the next 2 anniversary dates |