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 MCB 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/MCB"
Use Arkolith to show who owns MCB, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $85.0M | 1.0M | ▲+4.7% Added · +46K sh | Q1 2026 | |
| 2 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $48.7M | 585K | ▲+4.5% Added · +25K sh | Q1 2026 | |
| 3 | VANGUARD GROUP INC | $46.5M | 609K | ▼−1.8% Reduced · −11K sh | Q4 2025 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $41.8M | 502K | ▲New +502K sh | Q1 2026 | |
| 5 | DIMENSIONAL FUND ADVISORS LP | $38.3M | 460K | ▲+7.6% Added · +33K sh | Q1 2026 | |
| 6 | STATE STREET CORP | $31.9M | 384K | ▲+11% Added · +37K sh | Q1 2026 | |
| 7 | CITADEL ADVISORS LLC | $31.4M | 377K | ▲+358% Added · +295K sh | Q1 2026 | |
| 8 | UBS Group AG | $28.2M | 339K | ▲+423% Added · +274K sh | Q1 2026 | |
| 9 | AMERICAN CENTURY COMPANIES INC | $27.6M | 331K | ▲+1.4% Added · +4K sh | Q1 2026 | |
| 10 | MILLENNIUM MANAGEMENT LLC | $27.0M | 324K | ▲+441% Added · +264K sh | Q1 2026 | |
| 11 | GEODE CAPITAL MANAGEMENT, LLC | $21.9M | 262K | ▲+8.2% Added · +20K sh | Q1 2026 | |
| 12 | KENNEDY CAPITAL MANAGEMENT LLC | $18.1M | 218K | ▲New +218K sh | Q1 2026 | |
| 13 | BASSWOOD CAPITAL MANAGEMENT, L.L.C. | $17.5M | 210K | ▼−5.0% Reduced · −11K sh | Q1 2026 | |
| 14 | Bank of New York Mellon Corp | $16.1M | 194K | ▼−4.2% Reduced · −9K sh | Q1 2026 | |
| 15 | ALLIANCEBERNSTEIN L.P. | $13.5M | 177K | ▲16× Added · +166K sh | Q1 2026 | |
| 16 | MORGAN STANLEY | $12.5M | 151K | ▲+14% Added · +18K sh | Q1 2026 | |
| 17 | Nuveen, LLC | $12.5M | 150K | ▲+18% Added · +23K sh | Q1 2026 | |
| 18 | BANK OF AMERICA CORP /DE/ | $11.8M | 142K | ▲+612% Added · +122K sh | Q1 2026 | |
| 19 | Russell Investments Group, Ltd. | $10.3M | 124K | ▲+0.1% Added · +65 sh | Q1 2026 | |
| 20 | JPMORGAN CHASE & CO | $10.2M | 125K | ▼−22% Reduced · −34K sh | Q1 2026 | |
| 21 | D. E. Shaw & Co., Inc. | $9.8M | 117K | ▲+1.9% Added · +2K sh | Q1 2026 | |
| 22 | PRUDENTIAL FINANCIAL INC | $8.5M | 102K | ▲+47% Added · +33K sh | Q1 2026 | |
| 23 | VANGUARD PORTFOLIO MANAGEMENT LLC | $8.5M | 102K | ▲New +102K sh | Q1 2026 | |
| 24 | TWO SIGMA INVESTMENTS, LP | $8.0M | 97K | ▲+142% Added · +57K sh | Q1 2026 | |
| 25 | NORTHERN TRUST CORP | $8.0M | 96K | ▲+6.5% Added · +6K 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 |
|---|---|---|---|---|---|
| Jun 12, 2026 | PATENT ROBERT C | Director | Sell (S) | 10K | $964K |
| Mar 28, 2026 | DeFazio Mark R | President and CEO, Director | Tax withholding (F) | 6K | $488K |
| Mar 28, 2026 | Lublin Scott | EVP and Chief Lending Officer | Tax withholding (F) | 3K | $244K |
| Mar 10, 2026 | Dougherty Daniel F | EVP & Chief Financial Officer | Buy (P) | 1K | $80K |
| Mar 2, 2026 | DeFazio Mark R | President and CEO, Director | Tax withholding (F) | 9K | $795K |
| Mar 2, 2026 | Scott Norman | SVP and Chief Credit Officer | Grant (A) | 2K | $0 |
| Mar 2, 2026 | Scott Norman | SVP and Chief Credit Officer | Tax withholding (F) | 2K | $194K |
| Mar 2, 2026 | Erikson Frederik F | EVP & General Counsel | Grant (A) | 5K | $0 |
| Mar 2, 2026 | Erikson Frederik F | EVP & General Counsel | Tax withholding (F) | 661 | $56K |
| Mar 2, 2026 | Bonnar Gerald David | SVP, Controller, CAO & PAO | Tax withholding (F) | 1K | $92K |
| Mar 2, 2026 | Bonnar Gerald David | SVP, Controller, CAO & PAO | Grant (A) | 2K | $0 |
| Mar 2, 2026 | Dougherty Daniel F | EVP & Chief Financial Officer | Grant (A) | 5K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 58 funds | $22.4B |
| AMAZON.COM INCAMZN | 58 funds | $16.5B |
| BROADCOM INCAVGO | 58 funds | $13.6B |
| NVIDIA CORPNVDA | 57 funds | $35.1B |
| APPLE INCAAPL | 57 funds | $26.1B |
| ALPHABET INC-CL AGOOGL | 57 funds | $14.5B |
| META PLATFORMS INC-CLASS AMETA | 57 funds | $10.1B |
| ELI LILLY & COLLY | 57 funds | $6.2B |
| NETFLIX INCNFLX | 57 funds | $2.9B |
| JPMORGAN CHASE & COJPM | 56 funds | $7.1B |
| VISA INC-CLASS A SHARESV | 56 funds | $4.3B |
| MASTERCARD INC - AMA | 56 funds | $3.5B |
Ranked by how many of MCB'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 MCB. 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.