208 tracked 13F filers disclose a position in MRTN as of the latest SEC 13F filings, a combined $721.1M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $128.1M | 9.8M | ▲+0.9% Added · +91K sh | Q1 2026 | |
| 2 | DIMENSIONAL FUND ADVISORS LP | $64.3M | 4.9M | ▲+0.8% Added · +38K sh | Q1 2026 | |
| 3 | STATE STREET CORP | $47.3M | 2.7M | ▲+4.8% Added · +126K sh | Q2 2026 | |
| 4 | AMERICAN CENTURY COMPANIES INC | $34.4M | 2.6M | ▲+11% Added · +250K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $32.8M | 2.5M | →First observed position No prior filed position | Q1 2026 | |
| 6 | FMR LLC | $23.2M | 1.8M | ▲+168% Added · +1.1M sh | Q1 2026 | |
| 7 | Boston Partners | $22.3M | 1.7M | ▲+85% Added · +780K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $27.0M | 1.6M | ▲+5.8% Added · +86K sh | Q2 2026 | |
| 9 | TWO SIGMA INVESTMENTS, LP | $18.8M | 1.4M | ▲+66% Added · +567K sh | Q1 2026 | |
| 10 | MORGAN STANLEY | $17.0M | 1.3M | ▼−3.7% Reduced · −50K sh | Q1 2026 | |
| 11 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $16.7M | 1.3M | ▲+3.4% Added · +42K sh | Q1 2026 | |
| 12 | VANGUARD PORTFOLIO MANAGEMENT LLC | $14.6M | 1.1M | →First observed position No prior filed position | Q1 2026 | |
| 13 | Russell Investments Group, Ltd. | $14.4M | 1.1M | ▲+19% Added · +173K sh | Q1 2026 | |
| 14 | AMERIPRISE FINANCIAL INC | $12.7M | 970K | ▼−2.7% Reduced · −27K sh | Q1 2026 | |
| 15 | LONDON CO OF VIRGINIA | $11.7M | 889K | ▲+5.8% Added · +49K sh | Q1 2026 | |
| 16 | JPMORGAN CHASE & CO | $9.9M | 769K | ▲+43% Added · +231K sh | Q1 2026 | |
| 17 | 12th Street Asset Management Company, LLC | $13.2M | 759K | ▲New +759K sh | Q3 2026 | |
| 18 | DEPRINCE RACE & ZOLLO INC | $12.9M | 742K | ▼−3.3% Reduced · −25K sh | Q2 2026 | |
| 19 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $8.9M | 677K | ▲+8.0% Added · +50K sh | Q1 2026 | |
| 20 | CITADEL ADVISORS LLC | $8.8M | 669K | ▼−4.5% Reduced · −32K sh | Q1 2026 | |
| 21 | Nuveen, LLC | $8.6M | 652K | ▼−4.5% Reduced · −31K sh | Q1 2026 | |
| 22 | NORTHERN TRUST CORP | $8.2M | 626K | ▲+3.8% Added · +23K sh | Q1 2026 | |
| 23 | GOLDMAN SACHS GROUP INC | $8.1M | 620K | ▲+54% Added · +217K sh | Q1 2026 | |
| 24 | BANK OF AMERICA CORP /DE/ | $7.3M | 557K | ▲+49% Added · +183K sh | Q1 2026 | |
| 25 | NUANCE INVESTMENTS, LLC | $9.5M | 547K | ▼−89% Reduced · −4.3M sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 9 funds opened a new position in MRTN and 20 added to an existing one, while 15 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 99 funds | $197.9B |
| JPMORGAN CHASE & COJPM | 98 funds | $44.4B |
| NVIDIA CORPNVDA | 96 funds | $283.1B |
| APPLE INCAAPL | 96 funds | $212.3B |
| UNITEDHEALTH GROUP INCUNH | 96 funds | $21.6B |
| AMAZON.COM INCAMZN | 95 funds | $146.2B |
| ALPHABET INC-CL AGOOGL | 95 funds | $110.5B |
| META PLATFORMS INC-CLASS AMETA | 94 funds | $80.3B |
| VISA INC-CLASS A SHARESV | 94 funds | $42.9B |
| CHEVRON CORPCVX | 94 funds | $22.0B |
| UNION PACIFIC CORPUNP | 94 funds | $9.4B |
| BROADCOM INCAVGO | 93 funds | $114.0B |
Ranked by how many of MRTN's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Apr 28, 2025 | BAUER JERRY M | Director | Buy (P) | 20K | $258K |
| Oct 30, 2024 | BAUER JERRY M | Director | Buy (P) | 10K | $158K |
| Jul 25, 2024 | Phillips Adam Daniel | EVP & Chief Operating Officer | Sell (S) | 5K | $83K |
| Jun 12, 2024 | Petit Douglas Paul | President | Sell (S) | 5K | $82K |
| Mar 20, 2023 | WINKEL THOMAS J | Director | Sell (S) | 5K | $107K |
| Aug 15, 2022 | HAGNESS LARRY B | Director | Sell (S) | 10K | $236K |
| Mar 17, 2022 | WINKEL THOMAS J | Director | Sell (S) | 3K | $60K |
| Mar 10, 2022 | Hinnendael James J | Exec. VP and CFO | Sell (S) | 6K | $117K |
| Mar 3, 2022 | TURNER JOHN H | EVP Sales & Marketing | Sell (S) | 10K | $175K |
| Feb 23, 2022 | DEMOREST ROBERT L | Director | Sell (S) | 10K | $175K |
| Feb 3, 2022 | WINKEL THOMAS J | Director | Sell (S) | 5K | $88K |
| Dec 3, 2021 | DEMOREST ROBERT L | Director | Sell (S) | 5K | $88K |
Connected entities for MRTN
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MRTN/capital-change-brief"
Use Arkolith's capital_change_brief for MRTN. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MRTN. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.