As of the latest Form 4 filed May 6, 2026.
What M-tron Industries, Inc. insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 31 most recent filings for MPTI.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-05-06 | 2026-05-04 | Drafts William Arnold President | SSale | −361.00 | $66.78 | $24.1K | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Pforr Cameron CEO and CFO | SSale | −840.00 | $66.78 | $56.1K | No | Form 4 ↗ |
| 2026-05-06 | 2026-05-04 | Biles Linda M Executive VP - Finance | SSale | −306.00 | $66.78 | $20.4K | No | Form 4 ↗ |
| 2026-05-04 | 2026-04-29 | Pforr Cameron CEO and CFO | MExercise | +220.00 | $40.32 | $8.87K | No | Form 4 ↗ |
| 2026-05-04 | 2026-04-28 | Pforr Cameron, CEO and CFO | MExercise | +220.00 | $40.32 | $8.87K | No | Form 4 ↗ |
| 2026-04-29 | 2026-04-27 | Arteaga Ivan Director | XX | +24.00 | $59.00 | $1.42K | No | Form 4 ↗ |
| 2026-04-29 | 2026-04-10 | Arteaga Ivan, Director | XX | +174.00 | $59.00 | $10.3K | No | Form 4 ↗ |
| 2026-04-28 | 2026-04-20 | GABELLI MARC Director | XX | +3.28K | $59.00 | $193K | No | Form 4 ↗ |
| 2026-04-24 | 2026-04-07 | Pforr Cameron CEO and CFO | XX | +100.00 | $59.00 | $5.90K | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-20 | Susanto Hendi Director | XX | +1.07K | $59.00 | $63.2K | No | Form 4 ↗ |
| 2026-04-23 | 2026-04-14 | Susanto Hendi, Director | XX | +454.00 | $59.00 | $26.8K | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-14 | Biles Linda M Executive VP - Finance | SSale | −720.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-07 | 2026-04-02 | Pforr Cameron CEO and CFO | AAward | +5.65K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-07 | 2026-04-02 | Biles Linda M Executive VP - Finance | AAward | +2.06K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-07 | 2026-04-02 | Drafts William Arnold President | AAward | +2.43K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-07 | 2025-08-11 | Biles Linda M Executive VP - Finance | FTax | −617.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-23 | 2026-03-19 | Susanto Hendi Director | AAward | +242.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-23 | 2026-03-19 | Mega John S Director | AAward | +242.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-23 | 2026-03-19 | LAZAR BEL Director | AAward | +242.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-23 | 2026-03-19 | LaPenta Robert V Jr Director | AAward | +242.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-23 | 2026-03-19 | Goldman David M Director | AAward | +242.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-23 | 2026-03-19 | Arteaga Ivan Director | AAward | +242.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-23 | 2026-03-19 | GABELLI MARC Director | AAward | +242.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-08 | 2026-01-06 | Arteaga Ivan Director | XX | +35.00 | $47.50 | $1.66K | No | Form 4 ↗ |
| 2026-01-07 | 2025-12-23 | Goldman David M Director | XX | +325.00 | $47.50 | $15.4K | No | Form 4 ↗ |
| 2025-12-31 | 2025-12-23 | Susanto Hendi Director | XX | +892.00 | $47.50 | $42.4K | No | Form 4 ↗ |
| 2025-12-30 | 2025-12-22 | Pforr Cameron CEO and CFO | XX | +2.00K | $47.50 | $95.0K | No | Form 4 ↗ |
| 2025-12-30 | 2025-12-19 | Arteaga Ivan Director | XX | +72.00 | $47.50 | $3.42K | No | Form 4 ↗ |
| 2025-12-23 | 2025-12-19 | Drafts William Arnold President | XX | +201.00 | $47.50 | $9.55K | No | Form 4 ↗ |
| 2025-12-23 | 2025-12-18 | LAZAR BEL Director | XX | +1.00K | $47.50 | $47.5K | No | Form 4 ↗ |
| 2025-12-23 | 2025-12-04 | LaPenta Robert V Jr Director | XX | +306.00 | $47.50 | $14.5K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also MPTI’s full analysis or the market-wide insider trading feed. The tabs above jump to MPTI’s other SEC data.
Source: SEC Form 4 filings for MPTI, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.