MESA LABORATORIES INC /CO/ (MLAB)
$128.88+$0.44 (+0.34%) Today
Siddhartha Kadia - Officer
Lyndsey Elizabeth Crennen - OfficerLyndsey Elizabeth Crennen - OfficerMesa Laboratories Inc manufactures life sciences tools and critical quality control solutions. It operates in four divisions: i) Sterilization and Disinfection Control, which manufactures and sells biological, chemical, and cleaning indicators used to assess the effectiveness of sterilization, decontamination, disinfection, and cleaning processes. ii) Clinical Genomics division develops, manufactures, and sells sensitive, low-cost, high-throughput genetic analysis tools and related consumables. iii) The Biopharmaceutical Development division develops, manufactures, and sells automated systems for protein analysis (immunoassays) and peptide synthesis solutions. iv) The Calibration Solutions division develops, manufactures, sells, and services quality control products.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 2 | 7,993 | $902K |
| Open-market sale | 7 | 15,370 | $1.57M |
| Grant or award | 5 | 17,148 | |
| Option exercise | 26 | 50,350 | |
| Other acquisition / disposition | 2 | 5,731 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
35 Form 4 filings on record, the earliest from Oct 29, 2024, newest first. Filing history page 1 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Mark Christopher Capone - Director | Option exercise | Common Stock | 2,784 | $0.00 | - | |
| Mark Christopher Capone - Director | Option exercise | Restricted Stock Units - 3 | 2,784 | $0.00 | - | |
| Jennifer Sadie Alltoft - Director | Option exercise | Common Stock | 2,784 | $0.00 | - | |
| Jennifer Sadie Alltoft - Director | Option exercise | Restricted Stock Units - 9 | 2,784 | $0.00 | - | |
| Shiraz Shabanali Ladiwala - Director | Option exercise | Common Stock | 3,810 | $0.00 | - | |
| Shiraz Shabanali Ladiwala - Director | Option exercise | Restricted Stock Units - 6 | 3,810 | $0.00 | - | |
| Shannon Hall - Director | Option exercise | Common Stock | 2,784 | $0.00 | - | |
| Shannon Hall - Director | Option exercise | Restricted Stock Units - 8 | 2,784 | $0.00 | - | |
| John James Sullivan - Director | Open-market sale | Common Stock | 7,093 | $112.80 | $800K | |
| Siddhartha Kadia - Officer | Open-market purchase | Common Stock | 7,093 | $112.80 | $800K | |
| R. Tony Tripeny - Director | Open-market purchase | Common Stock | 900 | $113.69 | $102K | |
| Lyndsey Elizabeth Crennen - Officer | Option exercise | Restricted Stock Units - 3 | 368 | $0.00 | - | |
| Lyndsey Elizabeth Crennen - Officer | Option exercise | Common Stock | 125 | $95.10 | $12K | |
| Lyndsey Elizabeth Crennen - Officer | Option exercise | Common Stock | 233 | $95.10 | $22K | |
| Lyndsey Elizabeth Crennen - Officer | Option exercise | Common Stock | 368 | $95.10 | $35K | |
| Lyndsey Elizabeth Crennen - Officer | Grant or award | Common Stock | 263 | $95.10 | $25K | |
| Lyndsey Elizabeth Crennen - Officer | Open-market sale | Common Stock | 442 | $89.50 | $40K | |
| Lyndsey Elizabeth Crennen - Officer | Option exercise | Restricted Stock Unit - 1 | 125 | $0.00 | - | |
| Lyndsey Elizabeth Crennen - Officer | Option exercise | Restricted Stock Units - 2 | 233 | $0.00 | - | |
| Brian David Archbold - Officer | Option exercise | Restricted Stock Units - 7 | 844 | $0.00 | - | |
| Brian David Archbold - Officer | Option exercise | Restricted Stock Units - 8 | 2,480 | $0.00 | - | |
| Brian David Archbold - Officer | Option exercise | Common Stock | 844 | $95.10 | $80K | |
| Brian David Archbold - Officer | Option exercise | Common Stock | 2,480 | $95.10 | $236K | |
| Brian David Archbold - Officer | Open-market sale | Common Stock | 2,516 | $89.50 | $225K | |
| Brian David Archbold - Officer | Grant or award | Common Stock | 1,859 | $95.10 | $177K | |
| John Sakys - Officer | Option exercise | Restricted Stock Units - 6 | 1,036 | $0.00 | - | |
| John Sakys - Officer | Option exercise | Restricted Stock Units - 7 | 2,756 | $0.00 | - | |
| John Sakys - Officer | Option exercise | Common Stock | 1,036 | $95.10 | $99K | |
| John Sakys - Officer | Option exercise | Common Stock | 2,756 | $95.10 | $262K | |
| John Sakys - Officer | Grant or award | Common Stock | 2,282 | $95.10 | $217K | |
| John Sakys - Officer | Open-market sale | Common Stock | 2,827 | $89.50 | $253K | |
| Brian David Archbold - Officer | Open-market sale | Common Stock | 1,151 | $101.27 | $117K | |
| Lyndsey Elizabeth Crennen - Officer | Open-market sale | Common Stock | 118 | $101.27 | $12K | |
| John Sakys - Officer | Open-market sale | Common Stock | 1,223 | $101.27 | $124K | |
| Brian David Archbold - Officer | Option exercise | Restricted Stock Units - 9 | 2,454 | $0.00 | - | |
| Brian David Archbold - Officer | Grant or award | Restricted Stock Units - 10 | 4,328 | $0.00 | - | |
| Brian David Archbold - Officer | Option exercise | Common Stock | 2,454 | $104.08 | $255K | |
| Brian David Archbold - Officer | Other | Non Qualified Stock Options | 1,780 | $0.00 | - | |
| John Sakys - Officer | Option exercise | Restricted Stock Units 8 | 2,717 | $0.00 | - | |
| John Sakys - Officer | Grant or award | Restricted Stock Units - 9 | 8,416 | $0.00 | - | |
| John Sakys - Officer | Option exercise | Common Stock | 2,717 | $104.08 | $283K | |
| John Sakys - Officer | Other | Non Qualified Stock Option | 3,951 | $0.00 | - | |
| Siddhartha Kadia - Officer | Grant or award | Restricted Stock Units - 1 | 35,236 | $0.00 | - | |
| Siddhartha Kadia - Officer | Grant or award | Restricted Stock Units - 1 | 34,807 | $0.00 | - | |
| Gary M. Owens - Officer | Derivative | Restricted Stock Unit - 10 | 8,211 | $0.00 | - | |
| Shiraz Shabanali Ladiwala - Director | Open-market purchase | Common Stock | 3,500 | $72.23 | $253K | |
| Mark Christopher Capone - Director | Open-market purchase | Common Stock | 1,301 | $76.35 | $99K | |
| R. Tony Tripeny - Director | Open-market purchase | Common Stock | 1,315 | $76.00 | $100K | |
| John James Sullivan - Director | Gift | Common Stock | 2,000 | $0.00 | - | |
| Gary M. Owens - Officer | Option exercise | Common Stock | 11,558 | $0.00 | - | |
| Shiraz Shabanali Ladiwala - Director | Option exercise | Common Stock | 1,949 | $0.00 | - | |
| Shiraz Shabanali Ladiwala - Director | Option exercise | Restricted Stock Units - 5 | 1,949 | $0.00 | - | |
| Shiraz Shabanali Ladiwala - Director | Grant or award | Restricted Stock Units - 6 | 3,810 | $0.00 | - | |
| John James Sullivan - Director | Option exercise | Common Stock | 1,404 | $0.00 | - | |
| John James Sullivan - Director | Option exercise | Restricted Stock Units - 9 | 1,404 | $0.00 | - | |
| John James Sullivan - Director | Grant or award | Restricted Stock Units - 10 | 2,784 | $0.00 | - | |
| Jennifer Sadie Alltoft - Director | Option exercise | Common Stock | 1,404 | $0.00 | - | |
| Jennifer Sadie Alltoft - Director | Option exercise | Restricted Stock Units - 8 | 1,404 | $0.00 | - | |
| Jennifer Sadie Alltoft - Director | Grant or award | Restricted Stock Units - 9 | 2,784 | $0.00 | - | |
| Shannon Hall - Director | Option exercise | Common Stock | 1,404 | $0.00 | - | |
| Shannon Hall - Director | Option exercise | Restricted Stock Units - 7 | 1,404 | $0.00 | - | |
| Shannon Hall - Director | Grant or award | Restricted Stock Units - 8 | 2,784 | $0.00 | - | |
| Mark Christopher Capone - Director | Option exercise | Common Stock | 1,404 | $0.00 | - | |
| Mark Christopher Capone - Director | Option exercise | Restricted Stock Units - 2 | 1,404 | $0.00 | - | |
| Mark Christopher Capone - Director | Grant or award | Restricted Stock Units - 3 | 2,784 | $0.00 | - | |
| R. Tony Tripeny - Director | Option exercise | Common Stock | 1,404 | $0.00 | - | |
| R. Tony Tripeny - Director | Option exercise | Restricted Stock Units - 3 | 1,404 | $0.00 | - | |
| R. Tony Tripeny - Director | Grant or award | Restricted Stock Units - 4 | 2,784 | $0.00 | - | |
| John Sakys - Officer | Option exercise | Common Stock | 1,036 | $95.82 | $99K | |
| John Sakys - Officer | Tax withholding / forfeiture | Common Stock | 454 | $95.82 | $44K | |
| John Sakys - Officer | Option exercise | Restricted Stock Units - 6 | 1,036 | $0.00 | - |
A Form 144 is notice of an INTENDED sale, not a completed one. It often precedes the Form 4 that reports the trade actually happening.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Owens Gary M | Former Officer | 20,358 | $2.60M | View on EDGAR | |
| Owens Gary M | Former Officer | 20,000 | $2.45M | View on EDGAR | |
| - | - | - | - | View on EDGAR |
MESA LABORATORIES INC /CO/ (MLAB) had 15 insider filings in the last 90 days, with the most recent on 2026-08-17. The full record for MLAB runs to 35 Form 4 filings, the earliest from 2024-10-29. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
2 insider purchases of MLAB were filed in the last 90 days, totaling $902K.
7 insider sales of MLAB were filed in the last 90 days, totaling $1.57M.
This page tracks MLAB Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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