← United States · Coverage record
US · SEC FORM 4
MARTEN TRANSPORT LTD
MRTN · Nasdaq · CIK 0000799167 · Industrials · Trucking
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
12 Form 4 transaction lines observed in the same window
0 sales · 12 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 5 additional owner(s) remain in Form 4 evidence.
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-04-28 · BAUER JERRY M.
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 3,153,388
- Previous report
- 3,565,604
- Avg daily volume
- 970,690
- Days to cover
- 3.2
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2025-04-28 | BAUER JERRY M | Purchase (P) | Common Stock | 20,000 | USD 12.88 | USD 257,600 | SEC filing ↗ |
| 2024-10-30 | BAUER JERRY M | Purchase (P) | Common Stock | 10,000 | USD 15.81 | USD 158,100 | SEC filing ↗ |
| 2021-09-20 | BAUER JERRY M | Purchase (P) | Common Stock | 15,000 | USD 15.07 | USD 226,050 | SEC filing ↗ |
| 2020-10-30 | BAUER JERRY M | Purchase (P) | Common Stock | 7,070 | USD 15.25 | USD 107,818 | SEC filing ↗ |
Form 4 evidence
18 transaction lines in the latest 365-day window; 248 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-07-30 | MARTEN RANDOLPH L | Gift (G) | Common Stock | 1,200 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | Phillips Adam Daniel | Award / grant (A) | Common Stock | 4,661 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | Petit Douglas Paul | Award / grant (A) | Common Stock | 6,423 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (18 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-07-30 | MARTEN RANDOLPH L | Gift (G) | Common Stock | 1,200 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | Phillips Adam Daniel | Award / grant (A) | Common Stock | 4,661 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | Petit Douglas Paul | Award / grant (A) | Common Stock | 6,423 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | MARTEN RANDOLPH L | Award / grant (A) | Common Stock | 12,300 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | Jones Patricia L | Award / grant (A) | Common Stock | 4,100 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | IVERSON KATHLEEN P | Award / grant (A) | Common Stock | 4,100 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | Hinnendael James J | Award / grant (A) | Common Stock | 6,766 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | HAGNESS LARRY B | Award / grant (A) | Common Stock | 4,100 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | DEMOREST ROBERT L | Award / grant (A) | Common Stock | 4,100 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | Booth Ronald Richard | Award / grant (A) | Common Stock | 4,100 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | Baier Randall John | Award / grant (A) | Common Stock | 4,817 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-05 | BAUER JERRY M | Award / grant (A) | Common Stock | 4,100 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-02-20 | Phillips Adam Daniel | Tax withholding (F) | Common Stock | 1,131 | USD 13.90 | USD 15,721 | SEC filing ↗ |
| 2026-02-20 | Petit Douglas Paul | Tax withholding (F) | Common Stock | 2,299 | USD 13.90 | USD 31,956 | SEC filing ↗ |
| 2026-02-20 | MARTEN RANDOLPH L | Tax withholding (F) | Common Stock | 4,657 | USD 13.90 | USD 64,732 | SEC filing ↗ |
| 2026-02-20 | Hinnendael James J | Tax withholding (F) | Common Stock | 2,885 | USD 13.90 | USD 40,102 | SEC filing ↗ |
| 2026-02-20 | Baier Randall John | Tax withholding (F) | Common Stock | 1,273 | USD 13.90 | USD 17,695 | SEC filing ↗ |
| 2025-12-24 | DEMOREST ROBERT L | Gift (G) | Common Stock | 6,580 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | MRTN |
| CIK | 0000799167 |
| Sector | Industrials |
| Industry | Trucking Yahoo Finance |
| SEC SIC | 4213 Trucking (No Local) |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 248 transaction lines from 2020-01-28 to 2026-07-30 4 P purchase lines · 28 S sale lines · 216 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.