M-tron Industries, Inc.
MPTI · Electronic Components, NEC · 4.3M shares · +1%/yr ↑ shares · EDGAR filings ↗
Reference price $66.78 · est. market cap ~$289M — last insider sale, 2026-05-04 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
B72RF/microwave-electronics company (defense/aerospace) — profitable and rapidly growing with strong returns.
Strengths
- Profitable and rapidly growing — operating margin 19% (89th), ROA 12% (87th), revenue +284% (100th)
- Strong liquidity — current ratio 12.5 (89th)
Risks
- Defense-program/customer concentration — per 10-K
- Lumpy backlog/order timing — per 10-K
- Supply-chain risk — per 10-K
Notable findings
- Customer concentration~15% of revenue from one customer/distributor — 4%, from $39,618 in 2024 to $44,126 in 2025 primarily due to: • a $3,897, or 14
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC
- Notable holderHeld by 5 notable fund(s): RENAISSANCE TECHNOLOGIES LLC, STATE STREET CORP, CITADEL ADVISORS LLC +2 more (as of 2026-03-31)
- Insider sellingInsider selling — 4 open-market sale(s) by 3 insider(s) (cluster of 3 insiders, last 6mo) Form 4 ↗
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Operating margin
18.9%
Net margin
15.5%
Return on equity
13.4%
Return on assets
12.4%
Revenue growth (QoQ)
3.2%
Net-income growth
10.6%
Current ratio
12.5×
Free cash flow
$8M
Tangible book value
$63M
Cash & investments
$21M
Stock comp / revenue
2.0%
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-05-04 | Pforr Cameron | Sell | 840 | $66.78 |
| 2026-05-04 | Drafts William Arnold | Sell | 361 | $66.78 |
| 2026-05-04 | Biles Linda M | Sell | 306 | $66.78 |
| 2026-04-29 | Pforr Cameron | Option exercise | 220 | $40.32 |
| 2026-04-28 | Pforr Cameron | Option exercise | 220 | $40.32 |
| 2026-04-27 | Arteaga Ivan | Option exercise | 24 | $59.00 |
| 2026-04-20 | GABELLI MARC | Option exercise | 3.3K | $59.00 |
| 2026-04-20 | Susanto Hendi | Option exercise | 1.1K | $59.00 |
| 2026-04-14 | Susanto Hendi | Option exercise | 454 | $59.00 |
| 2026-04-14 | Biles Linda M | Sell | 720 | — |
| 2026-04-10 | Arteaga Ivan | Option exercise | 174 | $59.00 |
| 2026-04-07 | Pforr Cameron | Option exercise | 100 | $59.00 |
| 2026-04-02 | Biles Linda M | Grant | 2.1K | — |
| 2026-04-02 | Pforr Cameron | Grant | 5.6K | — |
| 2026-04-02 | Drafts William Arnold | Grant | 2.4K | — |
| 2026-03-19 | Goldman David M | Grant | 242 | — |
| 2026-03-19 | GABELLI MARC | Grant | 242 | — |
| 2026-03-19 | Arteaga Ivan | Grant | 242 | — |
| 2026-03-19 | Susanto Hendi | Grant | 242 | — |
| 2026-03-19 | Mega John S | Grant | 242 | — |
| 2026-03-19 | LAZAR BEL | Grant | 242 | — |
| 2026-03-19 | LaPenta Robert V Jr | Grant | 242 | — |
| 2026-01-06 | Arteaga Ivan | Option exercise | 35 | $47.50 |
| 2025-12-23 | Goldman David M | Option exercise | 325 | $47.50 |
| 2025-12-23 | Drafts William Arnold | Option exercise | 540 | $47.50 |
| 2025-12-23 | Susanto Hendi | Option exercise | 892 | $47.50 |
| 2025-12-22 | Pforr Cameron | Option exercise | 2.0K | $47.50 |
| 2025-12-19 | Drafts William Arnold | Option exercise | 201 | $47.50 |
| 2025-12-19 | Drafts William Arnold | Option exercise | 201 | $47.50 |
| 2025-12-19 | Arteaga Ivan | Option exercise | 72 | $47.50 |
| 2025-12-18 | LAZAR BEL | Option exercise | 1.0K | $47.50 |
| 2025-12-04 | LaPenta Robert V Jr | Option exercise | 306 | $47.50 |
| 2025-08-11 | Biles Linda M | Tax withheld | 617 | — |
| 2025-06-27 | Drafts William Arnold | Buy | 1.0K | $40.50 |
| 2025-05-28 | LaPenta Robert V Jr | Gift | 750 | — |
| 2025-03-21 | GABELLI MARC | Grant | 402 | — |
| 2025-03-21 | Goldman David M | Grant | 402 | — |
| 2025-03-21 | Susanto Hendi | Grant | 402 | — |
| 2025-03-21 | Mega John S | Grant | 402 | — |
| 2025-03-21 | LAZAR BEL | Grant | 402 | — |
| 2025-03-21 | LaPenta Robert V Jr | Grant | 402 | — |
| 2025-03-21 | Arteaga Ivan | Grant | 402 | — |
All non-derivative Form 4 activity (SEC), newest first.
Notable events (8-K)
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-06-18 | 2026-06-16 | 0001437749-26-021183 ↗ |
| 8-K | 2026-05-14 | 2026-05-12 | 0001437749-26-016895 ↗ |
| 10-Q | 2026-05-13 | 2026-03-31 | 0001437749-26-016784 ↗ |
| 8-K | 2026-05-08 | 2026-05-07 | 0001437749-26-015954 ↗ |
| 8-K | 2026-04-27 | 2026-04-27 | 0001437749-26-013378 ↗ |
| 8-K | 2026-04-21 | 2026-04-21 | 0001437749-26-012887 ↗ |
| 8-K | 2026-04-09 | 2026-04-09 | 0001437749-26-011924 ↗ |
| 8-K/A | 2026-03-31 | 2026-03-30 | 0001437749-26-010738 ↗ |
| 8-K | 2026-03-30 | 2026-03-30 | 0001437749-26-010186 ↗ |
| 10-K | 2026-03-26 | 2025-12-31 | 0001437749-26-009844 ↗ |
| 8-K | 2026-03-24 | 2026-03-24 | 0001437749-26-009642 ↗ |
| 8-K | 2026-03-18 | 2026-03-18 | 0001437749-26-008752 ↗ |