1736 tracked 13F filers disclose a position in MPC as of the latest SEC 13F filings, a combined $51.1B 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. | $6.0B | 24.4M | ▲+8.8% Added · +2.0M sh | Q1 2026 | |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | $4.7B | 19.2M | →First observed position No prior filed position | Q1 2026 | |
| 3 | STATE STREET CORP | $4.7B | 18.5M | ▼−2.9% Reduced · −553K sh | Q2 2026 | |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | $3.8B | 15.7M | →First observed position No prior filed position | Q1 2026 | |
| 5 | ELLIOTT MANAGEMENT CORP | $581.3M | 9.6M | ▲+12% Added · +1.1M sh | Q4 2019 | |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | $2.1B | 8.4M | ▲+6.8% Added · +530K sh | Q2 2026 | |
| 7 | MORGAN STANLEY | $1.5B | 6.1M | ▼−0.2% Reduced · −10K sh | Q1 2026 | |
| 8 | RAYMOND JAMES FINANCIAL INC | $1.4B | 5.8M | ▼−0.7% Reduced · −41K sh | Q1 2026 | |
| 9 | Boston Partners | $1.4B | 5.6M | ▼−7.7% Reduced · −471K sh | Q1 2026 | |
| 10 | FMR LLC | $1.2B | 4.9M | ▲+41% Added · +1.4M sh | Q1 2026 | |
| 11 | Bank of New York Mellon Corp | $965.3M | 4.0M | ▼−10% Reduced · −458K sh | Q1 2026 | |
| 12 | JPMORGAN CHASE & CO | $842.3M | 3.4M | ▲+7.4% Added · +238K sh | Q1 2026 | |
| 13 | NORTHERN TRUST CORP | $775.7M | 3.2M | ▼−3.4% Reduced · −113K sh | Q1 2026 | |
| 14 | DIMENSIONAL FUND ADVISORS LP | $754.1M | 3.1M | ▼−7.8% Reduced · −260K sh | Q1 2026 | |
| 15 | NORGES BANK | $472.3M | 2.9M | ▼−8.5% Reduced · −270K sh | Q4 2025 | |
| 16 | HARRIS ASSOCIATES L P | $685.2M | 2.8M | ▼−30% Reduced · −1.2M sh | Q1 2026 | |
| 17 | GOLDMAN SACHS GROUP INC | $672.7M | 2.8M | ▲+18% Added · +415K sh | Q1 2026 | |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $666.5M | 2.7M | ▼−3.1% Reduced · −89K sh | Q1 2026 | |
| 19 | BANK OF AMERICA CORP /DE/ | $633.7M | 2.6M | ▲+1.6% Added · +40K sh | Q1 2026 | |
| 20 | AMERIPRISE FINANCIAL INC | $543.1M | 2.2M | ▼−1.1% Reduced · −25K sh | Q1 2026 | |
| 21 | Amundi | $465.3M | 1.9M | ▲+2.6% Added · +49K sh | Q1 2026 | |
| 22 | Allianz Asset Management GmbH | $415.0M | 1.7M | ▲+9.6% Added · +148K sh | Q1 2026 | |
| 23 | UBS Group AG | $408.9M | 1.7M | ▲+32% Added · +406K sh | Q1 2026 | |
| 24 | Legal & General Group Plc | $405.6M | 1.7M | ▼−3.1% Reduced · −53K sh | Q1 2026 | |
| 25 | VANGUARD FIDUCIARY TRUST CO | $405.6M | 1.7M | →First observed position No prior filed position | 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.
Last quarter, 2 funds opened a new position in MPC and 23 added to an existing one, while 18 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 | 1104 funds | $341.8B |
| APPLE INCAAPL | 1099 funds | $387.7B |
| NVIDIA CORPNVDA | 1096 funds | $478.9B |
| AMAZON.COM INCAMZN | 1093 funds | $253.0B |
| ALPHABET INC-CL AGOOGL | 1080 funds | $225.9B |
| META PLATFORMS INC-CLASS AMETA | 1062 funds | $137.8B |
| JPMORGAN CHASE & COJPM | 1062 funds | $95.6B |
| ELI LILLY & COLLY | 1049 funds | $101.1B |
| BROADCOM INCAVGO | 1047 funds | $191.8B |
| ALPHABET INC-CL CGOOG | 1044 funds | $153.0B |
| JOHNSON & JOHNSONJNJ | 1027 funds | $66.4B |
| VISA INC-CLASS A SHARESV | 1025 funds | $78.8B |
Ranked by how many of MPC's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 31, 2026 | Lyon Shawn M | SVP Log & Storage, MPLX GP LLC | Sell (S) | 1K | $376K |
| Aug 28, 2026 | Lyon Shawn M | SVP Log & Storage, MPLX GP LLC | Sell (S) | 425 | $157K |
| Aug 27, 2026 | Brzezinski Erin M | VP and Controller | Sell (S) | 570 | $207K |
| Aug 17, 2026 | Benson Molly R | Chief Legal Ofc & Corp Sec | Sell (S) | 5K | $1.8M |
| Aug 17, 2026 | Benson Molly R | Chief Legal Ofc & Corp Sec | Sell (S) | 5K | $1.8M |
| Aug 17, 2026 | Benson Molly R | Chief Legal Ofc & Corp Sec | Sell (S) | 7K | $2.6M |
| Aug 13, 2026 | Lyon Shawn M | SVP Log & Storage, MPLX GP LLC | Sell (S) | 3K | $875K |
| Aug 12, 2026 | Henschen Michael A II | Ex VP, Refining | Sell (S) | 6K | $2.1M |
| Jun 4, 2026 | Henschen Michael A II | Ex VP, Refining | Sell (S) | 1K | $369K |
| Jun 4, 2026 | Henschen Michael A II | Ex VP, Refining | Sell (S) | 5K | $1.3M |
| May 13, 2026 | Hessling Ricky D. | Chief Commercial Officer | Sell (S) | 1K | $250K |
| Mar 13, 2026 | Hessling Ricky D. | Chief Commercial Officer | Sell (S) | 2K | $371K |
Connected entities for MPC
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/MPC/capital-change-brief"
Use Arkolith's capital_change_brief for MPC. 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 MPC. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.