What SEC filings does Mesa Laboratories, Inc. submit to the SEC?

Mesa Laboratories, Inc. (MLAB) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about MLAB?

A Form 4 for MLAB discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Mesa Laboratories, Inc.?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for MLAB?

The 10-K is Mesa Laboratories, Inc.'s annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all MLAB SEC filings directly on EDGAR?

You can view all historical Mesa Laboratories, Inc. filings on the SEC EDGAR company page for MLAB. Each filing card on this page links directly to the original SEC document.

How often does Mesa Laboratories, Inc. file with the SEC?

Mesa Laboratories, Inc. files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling MLAB shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

MLAB SEC Filing News — Mesa Laboratories, Inc.

Latest SEC filings for Mesa Laboratories, Inc. (MLAB) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-09-11.

Mesa Laboratories, Inc. develops, designs, manufactures, sells, and services life sciences tools and quality control products and services in North America, Europe, the Asia Pacific, and internationally. The Sterilization and Disinfection Control segment offers biological, chemical, and cleaning indicators, used to assess the effectiveness of sterilization, decontamination, disinfection, and cleaning processes in the pharmaceutical, medical device, and healthcare industries. This segment also pr…

Sector: Technology Industry: Scientific & Technical Instruments Market Cap: $695.3M CIK: 724004

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

What you're looking at: Each item below is parsed from an actual SEC filing submitted by Mesa Laboratories, Inc.. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.

MLAB Filing Activity Snapshot 2026-08-17 — 2026-09-11

Insider Transactions (Form 4)

0 buys vs 0 sells

Insider buying and selling activity is balanced in this period.

Largest Form 144 Filing

$2.60M

Owens Gary M · 2026-08-27

20,358 shares · Form 144

Form 144 Notices

Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 9 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 9 filings in this group are Form 4s for Mesa Laboratories, Inc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 9 insider filings shown, the breakdown is 6 compensation award and 3 option exercise. None of the classified filings involved a discretionary open-market trade, so this period says nothing about what insiders think of the price.

What each transaction type means

Compensation award ×6: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Option exercise ×3: The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.

Form 4 Compensation award Tax / Compensation Filing 2026-09-11

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Capone Mark Christopher (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units - 4	2,423	—	—

Filing: Form 4 (Insider Transaction) Insider: Capone Mark Christopher (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-11

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Ladiwala Shiraz Shabanali (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units - 7	2,510	—	—

Filing: Form 4 (Insider Transaction) Insider: Ladiwala Shiraz Shabanali (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-11

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Alltoft Jennifer Sadie (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units - 10	1,774	—	—

Filing: Form 4 (Insider Transaction) Insider: Alltoft Jennifer Sadie (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-11

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Hall Shannon (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units - 9	1,774	—	—

Filing: Form 4 (Insider Transaction) Insider: Hall Shannon (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-11

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Sullivan John James (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units - 11	1,774	—	—

Filing: Form 4 (Insider Transaction) Insider: Sullivan John James (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-11

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Tripeny R Tony (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units - 5	1,774	—	—

Filing: Form 4 (Insider Transaction) Insider: Tripeny R Tony (Director)

View on SEC EDGAR → Open Filing Document →

Form 4 Option exercise Tax / Compensation Filing 2026-08-17

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Capone Mark Christopher (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	2,784	—	—
`M`	Option exercise derivative · Restricted Stock Units - 3	2,784	—	—

Filing: Form 4 (Insider Transaction) Insider: Capone Mark Christopher (Director) Shares: 2,784

View on SEC EDGAR → Open Filing Document →

Form 4 Option exercise Tax / Compensation Filing 2026-08-17

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Alltoft Jennifer Sadie (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	2,784	—	—
`M`	Option exercise derivative · Restricted Stock Units - 9	2,784	—	—

Filing: Form 4 (Insider Transaction) Insider: Alltoft Jennifer Sadie (Director) Shares: 2,784

View on SEC EDGAR → Open Filing Document →

Form 4 Option exercise Tax / Compensation Filing 2026-08-17

MLAB insider Form 4 filed for equity award, exercise, or tax withholding

Ladiwala Shiraz Shabanali (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	3,810	—	—
`M`	Option exercise derivative · Restricted Stock Units - 6	3,810	—	—

Filing: Form 4 (Insider Transaction) Insider: Ladiwala Shiraz Shabanali (Director) Shares: 3,810

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 2 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Mesa Laboratories, Inc. has 2 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-08-27

MLAB Form 144 filed for proposed insider sale by Owens Gary M (20,358 shares) ~$2.60M

Owens Gary M filed a Form 144 with the SEC indicating intent to sell MLAB (MESA LABORATORIES INC /CO/) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Owens Gary M Shares: 20,358 Est. Value: $2.60M

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-21

MLAB Form 144 filed for proposed insider sale by Owens Gary M (20,000 shares) ~$2.45M

Filing: Form 144 (Proposed Sale Notice) Insider: Owens Gary M Shares: 20,000 Est. Value: $2.45M

View on SEC EDGAR → Open Filing Document →

Material Events 1 · Form 8-K

An 8-K reports a material event in the window between scheduled reports. There is 1 in this period for Mesa Laboratories, Inc. Each 8-K names the item number it is filed under, and that number is the fastest way to tell a routine disclosure from a consequential one.

Item 2.02 is an earnings release, Item 5.02 is a change of directors or officers, and Item 1.01 or 2.01 covers a material agreement or a completed acquisition. Item 7.01 and Item 8.01 are the general-purpose disclosure items and carry no fixed meaning on their own.

Form 8-K Material Company Update 2026-09-08

MLAB filed 8-K — material company event

MESA LABORATORIES INC /CO/ filed an 8-K with the SEC reporting a material event. Summary unavailable — view the original SEC filing for the full text.

Filing: 8-K (Material Event)

View on SEC EDGAR → Open Filing Document →

How we classify Mesa Laboratories, Inc.'s filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on MLAB. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — MLAB SEC Filings

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MLAB Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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