M-tron Industries, Inc. (MPTI) insider trading: who bought and sold

MPTI insider activity

35 transactions on file (0 open-market purchases and 5 open-market sales).

Scheduled or decided

5 open-market sales by MPTI insiders, between Apr 14, 2026 and Aug 11, 2026.

A sale made under a trading plan agreed months earlier is not the same event as one decided that week, and the filing itself says which.

Discretionary. The box was on the form and was not ticked. The sale was made at the prevailing price without a pre-arranged plan behind it.: $204K; 5 filings · 3 people
Planned (10b5-1). The filer ticked the Form 4's 10b5-1 box. The sale ran under a trading plan adopted before the trade, so it is a schedule executing rather than a view taken this week.: None; no sales on file
Not stated. The filing does not say. Either it predates the April 2023 checkbox, or nothing has re-read it since. This tab will not guess which of the other two it was.: None; no sales on file

Recent transactions 35 filed

Date	Insider	Type	Shares	Price	Value	Owned after
2026-08-11	Biles Linda M Executive VP - Finance Open-market sale Discretionary	Open-market sale Discretionary	+1,218	$85.05	+103.59K	28,723
2026-05-04	Drafts William Arnold President Open-market sale Discretionary	Open-market sale Discretionary	−361	$66.78	−24.11K	13,816
2026-05-04	Pforr Cameron CEO and CFO Open-market sale Discretionary	Open-market sale Discretionary	−840	$66.78	−56.1K	26,806
2026-05-04	Biles Linda M Executive VP - Finance Open-market sale Discretionary	Open-market sale Discretionary	−306	$66.78	−20.43K	28,376
2026-04-29	Pforr Cameron CEO and CFO Option exercise	Option exercise	+220	$40.32	+8.87K	28,186

30 more transactions are on Measure

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Each insider's stake 3 people

Insider	Role	On Sep 23, 2025	Now	Change	Sold
Pforr CameronCEO and CFO	CEO and CFO	27,646	26,806	−3.04%	$56.1K$56.1K no plan
Drafts William ArnoldPresident	President	14,177	13,816	−2.55%	$24.11K$24.11K no plan
Biles Linda MExecutive VP - Finance	Executive VP - Finance	29,402	28,723	−2.31%	$124K$124K no plan

What each insider held after every open-market trade, over the last twelve months.

The figure is each person’s holding as they reported it. It counts one class of stock and excludes grants, option exercises and shares withheld for tax, so a stake can fall here while somebody’s total holding does not. Since April 2023 a Form 4 states whether a trade ran under a pre-arranged 10b5-1 plan; an older one does not, and those dollars read “not stated” rather than being counted either way.

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The assistant answers from what MPTI has actually filed: 5 annual reports filed with the SEC, 34 Form 4 filings from the last year and 2 funds that hold it. Every figure in a reply links to the filing it came from, so an answer can be checked rather than believed.

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What an account lets you do with MPTI's filings

Source

From SEC Form 4 filings, filed within two business days of a transaction.

They are filed by officers, directors and 10%-owners. “Indirect” holdings (a trust, an LLC, a family member) are included and not distinguished from direct ones in this table.

Past transactions say nothing about future ones, and none of this is investment advice.

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What an account lets you do with MPTI's filings

After each open-market trade