Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MRTN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 9.8M | $128.1M | +0.9% | 11.962% | 0.00% |
| 2 | DIMENSIONAL FUND ADVISORS LP | 4.9M | $64.3M | +0.8% | 5.998% | 0.01% |
| 3 | NUANCE INVESTMENTS, LLC | 4.8M | $63.2M | -23.3% | 5.896% | 8.81% |
| 4 | AMERICAN CENTURY COMPANIES INC | 2.6M | $34.4M | +10.6% | 3.211% | 0.02% |
| 5 | STATE STREET CORP | 2.6M | $34.1M | +6.4% | 3.184% | 0.00% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 2.5M | $32.8M | — | 3.060% | 0.00% |
| 7 | FMR LLC | 1.8M | $23.2M | +167.7% | 2.168% | 0.00% |
| 8 | Boston Partners | 1.7M | $22.3M | +84.9% | 2.083% | 0.02% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 1.5M | $19.3M | +2.4% | 1.799% | 0.00% |
| 10 | TWO SIGMA INVESTMENTS, LP | 1.4M | $18.8M | +65.8% | 1.752% | 0.02% |
| 11 | MORGAN STANLEY | 1.3M | $17.0M | -3.7% | 1.586% | 0.00% |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3M | $16.7M | +3.4% | 1.562% | 0.00% |
| 13 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.1M | $14.6M | — | 1.365% | 0.00% |
| 14 | Russell Investments Group, Ltd. | 1.1M | $14.4M | +18.7% | 1.345% | 0.02% |
| 15 | ROYCE & ASSOCIATES LP | 980K | $12.9M | +250.1% | 1.201% | 0.13% |
| 16 | AMERIPRISE FINANCIAL INC | 970K | $12.7M | -2.8% | 1.189% | 0.00% |
| 17 | LONDON CO OF VIRGINIA | 889K | $11.7M | +5.8% | 1.090% | 0.07% |
| 18 | CITADEL ADVISORS LLC | 775K | $10.2M | +10.5% | 0.949% | 0.00% |
| 19 | DEPRINCE RACE & ZOLLO INC | 768K | $10.1M | +10.7% | 0.941% | 0.19% |
| 20 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 677K | $8.9M | +8.0% | 0.829% | 0.00% |
| 21 | Nuveen, LLC | 652K | $8.6M | -4.5% | 0.799% | 0.00% |
| 22 | NORTHERN TRUST CORP | 626K | $8.2M | +3.8% | 0.768% | 0.00% |
| 23 | GOLDMAN SACHS GROUP INC | 620K | $8.1M | +53.9% | 0.760% | 0.00% |
| 24 | BANK OF AMERICA CORP /DE/ | 557K | $7.3M | +49.1% | 0.683% | 0.00% |
| 25 | TEACHER RETIREMENT SYSTEM OF TEXAS | 547K | $7.2M | +12.1% | 0.670% | 0.03% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in MRTN — a direct measure of their conviction.
Filings activity in MRTN during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 220 | +8.9% | 50.19% | +6.95 pp | $744M | +16% |
| Q4 2025 | 202 | 4.7% | 43.24% | +3.47 pp | $641M | +8.7% |
| Q3 2025 | 212 | +1.0% | 39.77% | 10.52 pp | $589M | 21% |
| Q2 2025 | 210 | +9.4% | 50.29% | 2.70 pp | $745M | 5.1% |
| Q1 2025 | 192 | 0.5% | 52.99% | 6.43 pp | $785M | 11% |
| Q4 2024 | 193 | 1.5% | 59.42% | 6.18 pp | $880M | 9.4% |
| Q3 2024 | 196 | +3.7% | 65.60% | 2.59 pp | $972M | 3.8% |
| Q2 2024 | 189 | — | 68.19% | — | $1.01B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MRTN stock.
Based on Q1 2026 13F filings, institutional ownership of Marten Transport, Ltd. stands at 50.2%, held across 220 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of MRTN, with approximately 9,760,018 shares worth $0.13B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of MRTN, including TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for MRTN is 68 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
50 institutions opened new positions in MRTN during Q1 2026, while 32 fully exited. 134 added to existing positions and 32 trimmed.
MRTN institutional ownership rose by 6.95 percentage points quarter-over-quarter, with a net change of +18 holders.
The top 10 institutions account for 59.2% of all reported 13F value in MRTN, and the top 25 account for 81.9%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Marten Transport, Ltd. (MRTN) Institutional Ownership