16 tracked 13F filers disclose a position in MRT as of the latest SEC 13F filings, a combined $12.5M 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 | DLD Asset Management, LP | $9.3M | 7.1M | ▲+7.6% Added · +497K sh | Q2 2026 | |
| 2 | WELLS FARGO & COMPANY/MN | $2.0M | 1.0M | —Held | Q1 2026 | |
| 3 | Luxor Capital Group, LP | $466K | 356K | —Held | Q2 2026 | |
| 4 | Weiss Asset Management LP | $405K | 309K | ▲+142% Added · +181K sh | Q2 2026 | |
| 5 | RENAISSANCE TECHNOLOGIES LLC | $80K | 40K | ▼−45% Reduced · −33K sh | Q1 2026 | |
| 6 | BBR PARTNERS, LLC | $70K | 35K | —Held | Q1 2026 | |
| 7 | Curi Capital, LLC | $46K | 35K | —Held | Q2 2026 | |
| 8 | CJM Wealth Advisers, Ltd. | $46K | 35K | —Held | Q2 2026 | |
| 9 | STATE STREET CORP | $41K | 31K | ▼−6.8% Reduced · −2K sh | Q2 2026 | |
| 10 | CITADEL ADVISORS LLC | $23K | 11K | ▼−35% Reduced · −6K sh | Q1 2026 | |
| 11 | State of Wyoming | $21K | 7K | ▲New +7K sh | Q1 2025 | |
| 12 | UBS Group AG | $988 | 494 | ▼−82% Reduced · −2K sh | Q1 2026 | |
| 13 | SBI Securities Co., Ltd. | $131 | 100 | ▲New +100 sh | Q2 2026 | |
| 14 | CITIGROUP INC | $2 | 1 | ▲New +1 sh | Q1 2026 | |
| 15 | Farther Finance Advisors, LLC | $2 | 1 | —Held | Q1 2026 | |
| 16 | Caitong International Asset Management Co., Ltd | $1 | 1 | ▲New +1 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, 3 funds opened a new position in MRT and 2 added to an existing one, while 2 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 |
|---|---|---|
| NVIDIA CORPNVDA | 10 funds | $5.6B |
| TESLA INCTSLA | 9 funds | $1.2B |
| ALPHABET INC-CL CGOOG | 9 funds | $1.0B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 9 funds | $752.7M |
| MASTERCARD INC - AMA | 9 funds | $717.8M |
| ROBINHOOD MARKETS INC - AHOOD | 9 funds | $549.0M |
| ELI LILLY & COLLY | 9 funds | $440.6M |
| UBER TECHNOLOGIES INCUBER | 9 funds | $298.0M |
| NETFLIX INCNFLX | 9 funds | $204.5M |
| BROWN & BROWN INCBRO | 9 funds | $179.2M |
| KIMBERLY-CLARK CORPKMB | 9 funds | $153.1M |
| CHENIERE ENERGY INCLNG | 9 funds | $139.5M |
Ranked by how many of MRT's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jan 31, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 20K | $231K |
| Jan 31, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 25K | $289K |
| Jan 31, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 30K | $346K |
| Jan 30, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 15K | $172K |
| Jan 30, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 25K | $285K |
| Jan 30, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 25K | $284K |
| Jan 30, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 25K | $283K |
| Jan 29, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 25K | $281K |
| Jan 29, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 25K | $282K |
| Jan 29, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 25K | $282K |
| Jan 29, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 2K | $22K |
| Jan 29, 2019 | BlueMountain Capital Management, LLC | Director | Sell (S) | 50K | $565K |
Connected entities for MRT
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/MRT/capital-change-brief"
Use Arkolith's capital_change_brief for MRT. 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 MRT. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.