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/MPLX/capital-change-brief"
Use Arkolith's capital_change_brief for MPLX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | ALPS ADVISORS INC | $1.5B | 27.1M | ▲63× Added · +26.6M sh | Q1 2026 | |
| 2 | Blackstone Inc. | $876.1M | 15.4M | ▼−2.3% Reduced · −355K sh | Q1 2026 | |
| 3 | TORTOISE CAPITAL ADVISORS, L.L.C. | $756.8M | 13.3M | ▼−0.4% Reduced · −59K sh | Q1 2026 | |
| 4 | GOLDMAN SACHS GROUP INC | $713.8M | 12.5M | ▲+0.3% Added · +41K sh | Q1 2026 | |
| 5 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $417.7M | 7.3M | ▲+5.9% Added · +411K sh | Q1 2026 | |
| 6 | KAYNE ANDERSON CAPITAL ADVISORS LP | $389.6M | 6.8M | ▼−5.5% Reduced · −401K sh | Q1 2026 | |
| 7 | UBS Group AG | $298.7M | 5.2M | ▼−1.3% Reduced · −71K sh | Q1 2026 | |
| 8 | Energy Income Partners, LLC | $294.3M | 5.2M | ▼−2.7% Reduced · −142K sh | Q1 2026 | |
| 9 | MORGAN STANLEY | $283.3M | 5.0M | ▼−14% Reduced · −799K sh | Q1 2026 | |
| 10 | JPMORGAN CHASE & CO | $238.4M | 4.1M | ▲+26% Added · +848K sh | Q1 2026 | |
| 11 | BANK OF MONTREAL /CAN/ | $229.8M | 4.0M | ▲714× Added · +4.0M sh | Q1 2026 | |
| 12 | FMR LLC | $191.8M | 3.4M | ▲+101% Added · +1.7M sh | Q1 2026 | |
| 13 | Brave Warrior Advisors, LLC | $185.7M | 3.3M | ▼−27% Reduced · −1.2M sh | Q1 2026 | |
| 14 | CIBC Bancorp USA Inc. | $148.3M | 2.6M | ▲New +2.6M sh | Q1 2026 | |
| 15 | BANK OF AMERICA CORP /DE/ | $146.9M | 2.6M | ▼−70% Reduced · −6.0M sh | Q1 2026 | |
| 16 | Clearbridge Investments, LLC | $133.8M | 2.3M | —Held | Q1 2026 | |
| 17 | MILLER HOWARD INVESTMENTS INC /NY | $127.8M | 2.2M | ▼−3.3% Reduced · −76K sh | Q1 2026 | |
| 18 | WESTWOOD HOLDINGS GROUP INC | $127.7M | 2.2M | ▲53× Added · +2.2M sh | Q1 2026 | |
| 19 | BROOKFIELD Corp /ON/ | $124.1M | 2.2M | ▼−27% Reduced · −786K sh | Q1 2026 | |
| 20 | CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT | $106.1M | 1.9M | ▼−1.3% Reduced · −25K sh | Q1 2026 | |
| 21 | EAGLE GLOBAL ADVISORS LLC | $103.0M | 1.8M | ▼−4.2% Reduced · −79K sh | Q1 2026 | |
| 22 | ING GROEP NV | $100.9M | 1.8M | ▼−39% Reduced · −1.1M sh | Q1 2026 | |
| 23 | DUFF & PHELPS INVESTMENT MANAGEMENT CO | $95.2M | 1.7M | ▼−8.9% Reduced · −164K sh | Q1 2026 | |
| 24 | AlphaCore Capital LLC | $92.2M | 1.6M | ▲+0.6% Added · +9K sh | Q1 2026 | |
| 25 | STIFEL FINANCIAL CORP | $75.9M | 1.3M | ▲+0.2% Added · +2K sh | Q1 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 15, 2026 | Walker Ray N JR | Director | Grant (A) | 78 | $0 |
| May 15, 2026 | SURMA JOHN P | Director | Grant (A) | 2K | $0 |
| May 15, 2026 | STICE J MICHAEL | Director | Grant (A) | 1K | $0 |
| May 15, 2026 | SEMPLE FRANK M | Director | Grant (A) | 1K | $0 |
| May 15, 2026 | Peiffer Garry L. | Director | Grant (A) | 1K | $0 |
| May 15, 2026 | HELMS CHRISTOPHER A | Director | Grant (A) | 1K | $0 |
| May 15, 2026 | Breves Christine S | Director | Grant (A) | 277 | $0 |
| Apr 30, 2026 | Walker Ray N JR | Director | Grant (A) | 2K | $0 |
| Apr 30, 2026 | SURMA JOHN P | Director | Grant (A) | 3K | $0 |
| Apr 30, 2026 | STICE J MICHAEL | Director | Grant (A) | 3K | $0 |
| Apr 30, 2026 | SEMPLE FRANK M | Director | Grant (A) | 3K | $0 |
| Apr 30, 2026 | Peiffer Garry L. | Director | Grant (A) | 2K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 182 funds | $38.2B |
| EXXON MOBIL CORPXOM | 182 funds | $9.3B |
| CHEVRON CORPCVX | 182 funds | $7.2B |
| NVIDIA CORPNVDA | 181 funds | $49.8B |
| ALPHABET INC-CL AGOOGL | 181 funds | $26.7B |
| ALPHABET INC-CL CGOOG | 181 funds | $18.2B |
| JPMORGAN CHASE & COJPM | 181 funds | $16.7B |
| META PLATFORMS INC-CLASS AMETA | 181 funds | $16.4B |
| JOHNSON & JOHNSONJNJ | 181 funds | $9.9B |
| APPLE INCAAPL | 180 funds | $49.7B |
| AMAZON.COM INCAMZN | 180 funds | $29.1B |
| BROADCOM INCAVGO | 180 funds | $18.8B |
Ranked by how many of MPLX's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MPLX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.