Latest filingSep 11, 2026Most recent Form 4
MLAB
MESA LABORATORIES INC /CO/
NasdaqIndustrialsIndustrial Instruments For Measurement, Display, and Control
Insider activity for last month from 08/11 to 09/11. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$90.2M2 buys
Total selling$80.0M1 sells
Net open-market+$10.2M7 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period20transactions
- M · Option exercise · dominant12 · 60%
- A · Grants / awards5 · 25%
- P · Open-market buys2 · 10%
- S · Open-market sells1 · 5%
Activity by reported role
A joint filing can contribute to multiple roles20transactions
- Director · dominant19 · 95%
- PRES1 · 5%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (7)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeTripeny R TonyCommon Stock · Direct
9,082Aug 15, 2026
Sullivan John JamesCommon Stock · Direct
20,618Aug 15, 2026
Kadia SiddharthaCommon Stock · Indirect · By Trust
7,093Aug 13, 2026
Sullivan John JamesRestricted Stock Units - 10 · Direct
0Aug 15, 2026
Tripeny R TonyRestricted Stock Units - 4 · Direct
0Aug 15, 2026
Hall ShannonRestricted Stock Units - 8 · Direct
0Aug 15, 2026
Hall ShannonCommon Stock · Direct
6,973Aug 15, 2026
Ladiwala Shiraz ShabanaliRestricted Stock Units - 6 · Direct
0Aug 15, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 11 → Sep 11
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Top insiders
By absolute net value across the selected period- KS+$800.1k
- TT+$102.3k
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
MLAB transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| MLAB | Kadia Siddhartha | PRES | buy | 7.09k | $80.0M | P | +16.6% | 08/17 | 08/13 | |
| MLAB | Tripeny R Tony | DIR | buy | 900 | $10.2M | P | +16.6% | 08/17 | 08/13 |
MESA LABORATORIES INC /CO/ Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at MESA LABORATORIES INC /CO/?
Capone Mark Christopher, Ladiwala Shiraz Shabanali, Hall Shannon, Sullivan John James, Tripeny R Tony, Alltoft Jennifer Sadie, Kadia Siddhartha.
When was the latest reported open-market purchase?
Kadia Siddhartha reported a buy on Aug 13, 2026 valued at $80.0M. Read the SEC filing.
When was the latest reported open-market sale?
Sullivan John James reported a sale on Aug 13, 2026 valued at $80.0M. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market buying in the selected period was $102,321.00. This describes filed transactions, not a bullish rating.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.