Marten Transport, Ltd. (MRTN) ownership: Randolph L. Marten 44% · institutions 64% · index and ETF funds 11% (13F 2026-03-31). Insider activity, 90 days: 0 sales, 0 open-market buys. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| BlackRock | 9760018.00 | $128.15M | 12.0% | 2026-03-31 |
| Dimensional Fund Advisors | 4893498.00 | $64.25M | 6.0% | 2026-03-31 |
| Nuance Investments, LLC | 4810420.00 | $63.16M | 5.9% | 2026-03-31 |
| Vanguard | 4120046.00 | $54.10M | 5.0% | 2026-03-31 |
| American Century | 2619968.00 | $34.40M | 3.2% | 2026-03-31 |
| State Street | 2597547.00 | $34.11M | 3.2% | 2026-03-31 |
| FMR (Fidelity) | 1769146.00 | $23.23M | 2.2% | 2026-03-31 |
| Boston Partners | 1699815.00 | $22.32M | 2.1% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-07-30 | |
| Sell | null | 2026-05-05 | |
| Sell | null | 2026-05-05 | |
| Sell | null | 2026-05-05 | |
| Sell | null | 2026-05-05 | |
| Sell | null | 2026-05-05 | |
| Sell | null | 2026-05-05 | |
| Sell | null | 2026-05-05 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.