Marten Transport, Ltd. (MRTN) ownership: Top institutional holder: BlackRock, Inc. ($128.15M). Insider activity: Net Seller (5 buys, 11 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 9760018.00 | $128.15M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 4893498.00 | $64.25M | 2026-03-31 |
| NUANCE INVESTMENTS, LLC | 4810420.00 | $63.16M | 2026-03-31 |
| VANGUARD GROUP INC | 4013753.00 | $45.68M | 2025-12-31 |
| BlackRock Fund Advisors | 1808621.00 | $42.14M | 2016-12-31 |
| AMERICAN CENTURY COMPANIES INC | 2619968.00 | $34.40M | 2026-03-31 |
| STATE STREET CORP | 2597547.00 | $34.11M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2496685.00 | $32.78M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| 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 | |
| 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.