The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query MPX owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MPX"
Use Arkolith to show who owns MPX, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | DIMENSIONAL FUND ADVISORS LP | $5.6M | 768K | ▲+2.8% Added · +21K sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $5.1M | 584K | ▲+1.3% Added · +8K sh | Q4 2025 | |
| 3 | BlackRock, Inc. | $4.5M | 626K | ▼−0.9% Reduced · −6K sh | Q1 2026 | |
| 4 | GAMCO INVESTORS, INC. ET AL | $3.7M | 509K | ▲+1.8% Added · +9K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $3.3M | 450K | ▲New +450K sh | Q1 2026 | |
| 6 | DEPRINCE RACE & ZOLLO INC | $3.2M | 446K | ▲+7.2% Added · +30K sh | Q1 2026 | |
| 7 | Russell Investments Group, Ltd. | $2.8M | 388K | ▲+25% Added · +78K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $1.9M | 261K | ▲+4.3% Added · +11K sh | Q1 2026 | |
| 9 | GABELLI FUNDS LLC | $1.7M | 233K | —Held | Q1 2026 | |
| 10 | STATE STREET CORP | $1.3M | 181K | ▼−1.0% Reduced · −2K sh | Q1 2026 | |
| 11 | Bank of New York Mellon Corp | $1.2M | 159K | ▲+9.8% Added · +14K sh | Q1 2026 | |
| 12 | NORTHERN TRUST CORP | $624K | 86K | ▼−5.4% Reduced · −5K sh | Q1 2026 | |
| 13 | VANGUARD FIDUCIARY TRUST CO | $523K | 72K | ▲New +72K sh | Q1 2026 | |
| 14 | RENAISSANCE TECHNOLOGIES LLC | $480K | 66K | ▼−2.6% Reduced · −2K sh | Q1 2026 | |
| 15 | AMERICAN CENTURY COMPANIES INC | $396K | 54K | ▼−28% Reduced · −21K sh | Q1 2026 | |
| 16 | TRUIST FINANCIAL CORP | $393K | 54K | —Held | Q1 2026 | |
| 17 | VANGUARD PORTFOLIO MANAGEMENT LLC | $377K | 52K | ▲New +52K sh | Q1 2026 | |
| 18 | GOLDMAN SACHS GROUP INC | $315K | 43K | ▼−1.7% Reduced · −735 sh | Q1 2026 | |
| 19 | MORGAN STANLEY | $223K | 31K | ▼−68% Reduced · −66K sh | Q1 2026 | |
| 20 | Pinnacle Financial Partners, Inc. | $222K | 31K | —Held | Q1 2026 | |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $187K | 26K | ▼−0.1% Reduced · −25 sh | Q1 2026 | |
| 22 | Ancora Advisors LLC | $183K | 25K | ▲New +25K sh | Q1 2026 | |
| 23 | Nuveen, LLC | $142K | 20K | ▲+0.6% Added · +117 sh | Q1 2026 | |
| 24 | UBS Group AG | $113K | 16K | ▲+281% Added · +12K sh | Q1 2026 | |
| 25 | WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $104K | 14K | ▲+0.3% Added · +47 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 |
|---|---|---|---|---|---|
| Jan 28, 2026 | Palmer Ben M | President and CEO, Director | Tax withholding (F) | 9K | $85K |
| Jan 28, 2026 | Schmit Michael | CFO and Corporate Secretary | Tax withholding (F) | 3K | $25K |
| Jan 28, 2026 | HUBBELL RICHARD A | Executive Chairman of Board, Director | Tax withholding (F) | 5K | $49K |
| Jan 27, 2026 | Palmer Ben M | President and CEO, Director | Grant (A) | 85K | — |
| Jan 27, 2026 | HUBBELL RICHARD A | Executive Chairman of Board, Director | Grant (A) | 44K | — |
| Jan 27, 2026 | Schmit Michael | CFO and Corporate Secretary | Grant (A) | 25K | — |
| Jan 26, 2026 | Schmit Michael | CFO and Corporate Secretary | Tax withholding (F) | 1K | $10K |
| Jan 26, 2026 | Palmer Ben M | President and CEO, Director | Tax withholding (F) | 3K | $29K |
| Jan 26, 2026 | HUBBELL RICHARD A | Executive Chairman of Board, Director | Tax withholding (F) | 3K | $24K |
| Jan 23, 2026 | Schmit Michael | CFO and Corporate Secretary | Tax withholding (F) | 3K | $30K |
| Jan 23, 2026 | HUBBELL RICHARD A | Executive Chairman of Board, Director | Tax withholding (F) | 5K | $52K |
| Jan 23, 2026 | Palmer Ben M | President and CEO, Director | Tax withholding (F) | 9K | $83K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 18 funds | $3.9B |
| JPMORGAN CHASE & COJPM | 18 funds | $1.6B |
| JOHNSON & JOHNSONJNJ | 18 funds | $1.3B |
| EXXON MOBIL CORPXOM | 18 funds | $1.2B |
| CHEVRON CORPCVX | 18 funds | $774.2M |
| RTX CORPRTX | 18 funds | $518.7M |
| HONEYWELL INTERNATIONAL INCHON | 18 funds | $409.2M |
| GOLDMAN SACHS GROUP INCGS | 18 funds | $386.7M |
| ABBOTT LABORATORIESABT | 18 funds | $382.2M |
| WELLS FARGO & COWFC | 18 funds | $349.8M |
| UNION PACIFIC CORPUNP | 18 funds | $315.9M |
| CITIGROUP INCC | 18 funds | $290.9M |
Ranked by how many of MPX'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 MPX. 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.