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/MTN/capital-change-brief"
Use Arkolith's capital_change_brief for MTN. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $433.3M | 3.4M | ▲+1.5% Added · +50K sh | Q1 2026 | |
| 2 | Oasis Management Co Ltd. | $268.0M | 2.1M | ▲+13% Added · +237K sh | Q1 2026 | |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | $217.0M | 1.7M | ▲New +1.7M sh | Q1 2026 | |
| 4 | GEODE CAPITAL MANAGEMENT, LLC | $216.8M | 1.7M | ▲+141% Added · +986K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $206.0M | 1.6M | ▲New +1.6M sh | Q1 2026 | |
| 6 | FMR LLC | $154.1M | 1.2M | ▲+151% Added · +723K sh | Q1 2026 | |
| 7 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $153.1M | 1.2M | ▼−17% Reduced · −247K sh | Q1 2026 | |
| 8 | First Pacific Advisors, LP | $150.9M | 1.2M | ▲+8.2% Added · +89K sh | Q1 2026 | |
| 9 | STATE STREET CORP | $144.0M | 1.1M | ▲+0.8% Added · +9K sh | Q1 2026 | |
| 10 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | $125.3M | 977K | ▲+26% Added · +202K sh | Q1 2026 | |
| 11 | MORGAN STANLEY | $99.0M | 771K | ▲+13% Added · +87K sh | Q1 2026 | |
| 12 | HARRIS ASSOCIATES L P | $95.7M | 746K | ▲+4.3% Added · +31K sh | Q1 2026 | |
| 13 | UBS Group AG | $92.6M | 721K | ▲+25% Added · +142K sh | Q1 2026 | |
| 14 | EMINENCE CAPITAL, LP | $91.6M | 714K | ▲New +714K sh | Q1 2026 | |
| 15 | DIMENSIONAL FUND ADVISORS LP | $83.3M | 649K | ▼−4.6% Reduced · −31K sh | Q1 2026 | |
| 16 | HighTower Advisors, LLC | $74.5M | 581K | ▲+29% Added · +130K sh | Q1 2026 | |
| 17 | River Road Asset Management, LLC | $64.7M | 504K | ▼−0.9% Reduced · −5K sh | Q1 2026 | |
| 18 | NORTHERN TRUST CORP | $54.0M | 421K | ▼−10% Reduced · −48K sh | Q1 2026 | |
| 19 | Corient Private Wealth LLC | $52.8M | 412K | ▼−0.8% Reduced · −3K sh | Q1 2026 | |
| 20 | Epoch Investment Partners, Inc. | $49.7M | 387K | ▲+14% Added · +48K sh | Q1 2026 | |
| 21 | Bank of New York Mellon Corp | $47.1M | 367K | ▼−3.9% Reduced · −15K sh | Q1 2026 | |
| 22 | NORGES BANK | $41.1M | 310K | ▼−5.9% Reduced · −19K sh | Q4 2025 | |
| 23 | Artisan Partners Limited Partnership | $34.6M | 270K | ▼−6.7% Reduced · −19K sh | Q1 2026 | |
| 24 | VANGUARD FIDUCIARY TRUST CO | $29.1M | 227K | ▲New +227K sh | Q1 2026 | |
| 25 | KETTLE HILL CAPITAL MANAGEMENT, LLC | $26.5M | 207K | ▲New +207K 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 4, 2026 | KATZ ROBERT A | CEO & Chairperson of the Board, Director | Option exercise (M) | 2K | $0 |
| Jun 4, 2026 | KATZ ROBERT A | CEO & Chairperson of the Board, Director | Tax withholding (F) | 589 | $79K |
| Jun 4, 2026 | KATZ ROBERT A | CEO & Chairperson of the Board, Director | Option exercise (M) | 2K | $0 |
| May 1, 2026 | DeCecco Julie A. | GC & Chief Public Affairs Ofc | Option exercise (M) | 73 | $0 |
| May 1, 2026 | DeCecco Julie A. | GC & Chief Public Affairs Ofc | Tax withholding (F) | 21 | $3K |
| May 1, 2026 | DeCecco Julie A. | GC & Chief Public Affairs Ofc | Option exercise (M) | 73 | $0 |
| Mar 16, 2026 | KATZ ROBERT A | CEO & Chairperson of the Board, Director | Buy (P) | 38K | $4.9M |
| Mar 16, 2026 | Korch Angela A | EVP & Chief Financial Officer | Buy (P) | 190 | $25K |
| Feb 1, 2026 | BURGOYNE CELESTE | EVP, Chief Revenue Officer | Grant (A) | 10K | $0 |
| Feb 1, 2026 | BURGOYNE CELESTE | EVP, Chief Revenue Officer | Grant (A) | 17K | $0 |
| Feb 1, 2026 | BURGOYNE CELESTE | EVP, Chief Revenue Officer | Grant (A) | 24K | $0 |
| Feb 1, 2026 | BURGOYNE CELESTE | EVP, Chief Revenue Officer | Grant (A) | 39K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 139 funds | $53.8B |
| META PLATFORMS INC-CLASS AMETA | 139 funds | $25.7B |
| AMAZON.COM INCAMZN | 137 funds | $42.8B |
| ALPHABET INC-CL AGOOGL | 137 funds | $37.2B |
| NVIDIA CORPNVDA | 135 funds | $72.2B |
| APPLE INCAAPL | 133 funds | $62.5B |
| BROADCOM INCAVGO | 133 funds | $27.4B |
| CHEVRON CORPCVX | 133 funds | $7.8B |
| ELI LILLY & COLLY | 132 funds | $13.2B |
| VISA INC-CLASS A SHARESV | 132 funds | $11.7B |
| NETFLIX INCNFLX | 132 funds | $7.3B |
| ORACLE CORPORCL | 132 funds | $6.4B |
Ranked by how many of MTN'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 MTN. 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.