88 tracked 13F filers disclose a position in MNTK as of the latest SEC 13F filings, a combined $24.1M 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. | $4.9M | 4.2M | ▼−2.4% Reduced · −105K sh | Q1 2026 | |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | $3.1M | 2.7M | →First observed position No prior filed position | Q1 2026 | |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | $2.0M | 1.8M | ▲+2.0% Added · +34K sh | Q1 2026 | |
| 4 | Baader Bank Aktiengesellschaft | $2.5M | 1.6M | —Held | Q2 2026 | |
| 5 | STATE STREET CORP | $1.6M | 1.4M | ▼−1.5% Reduced · −20K sh | Q1 2026 | |
| 6 | BARCLAYS PLC | $1.2M | 1.0M | ▲+850% Added · +930K sh | Q1 2026 | |
| 7 | AMERICAN CENTURY COMPANIES INC | $1.1M | 954K | ▼−0.1% Reduced · −643 sh | Q1 2026 | |
| 8 | DIMENSIONAL FUND ADVISORS LP | $847K | 737K | ▼−12% Reduced · −96K sh | Q1 2026 | |
| 9 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $599K | 521K | ▼−4.4% Reduced · −24K sh | Q1 2026 | |
| 10 | NORTHERN TRUST CORP | $581K | 505K | ▲+8.5% Added · +40K sh | Q1 2026 | |
| 11 | VANGUARD FIDUCIARY TRUST CO | $497K | 432K | →First observed position No prior filed position | Q1 2026 | |
| 12 | Hosking Partners LLP | $456K | 397K | ▲+0.2% Added · +682 sh | Q1 2026 | |
| 13 | VANGUARD PORTFOLIO MANAGEMENT LLC | $447K | 389K | →First observed position No prior filed position | Q1 2026 | |
| 14 | RENAISSANCE TECHNOLOGIES LLC | $408K | 355K | ▲+3.5% Added · +12K sh | Q1 2026 | |
| 15 | GOLDMAN SACHS GROUP INC | $381K | 331K | ▲+69% Added · +135K sh | Q1 2026 | |
| 16 | FIRST TRUST ADVISORS LP | $359K | 312K | ▼−7.8% Reduced · −26K sh | Q1 2026 | |
| 17 | MORGAN STANLEY | $301K | 261K | ▼−20% Reduced · −67K sh | Q1 2026 | |
| 18 | MILLENNIUM MANAGEMENT LLC | $238K | 207K | ▲+706% Added · +181K sh | Q1 2026 | |
| 19 | MARSHALL WACE, LLP | $235K | 205K | ▲New +205K sh | Q1 2026 | |
| 20 | Bank of New York Mellon Corp | $225K | 196K | ▼−6.5% Reduced · −14K sh | Q1 2026 | |
| 21 | JPMORGAN CHASE & CO | $193K | 162K | ▼−5.8% Reduced · −10K sh | Q1 2026 | |
| 22 | Nuveen, LLC | $161K | 140K | ▲+0.6% Added · +858 sh | Q1 2026 | |
| 23 | Caprock Group, LLC | $187K | 120K | ▲New +120K sh | Q2 2026 | |
| 24 | D. E. Shaw & Co., Inc. | $136K | 118K | ▼−39% Reduced · −74K sh | Q1 2026 | |
| 25 | Rathbones Group PLC | $117K | 102K | ▲+11% Added · +10K 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.
Last quarter, 9 funds opened a new position in MNTK and 12 added to an existing one, while 10 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 |
|---|---|---|
| AMAZON.COM INCAMZN | 20 funds | $8.1B |
| BROADCOM INCAVGO | 20 funds | $6.0B |
| ALPHABET INC-CL CGOOG | 20 funds | $4.4B |
| MICRON TECHNOLOGY INCMU | 20 funds | $3.1B |
| VISA INC-CLASS A SHARESV | 20 funds | $2.0B |
| COSTCO WHOLESALE CORPCOST | 20 funds | $1.7B |
| CITIGROUP INCC | 20 funds | $1.4B |
| MORGAN STANLEYMS | 20 funds | $1.2B |
| LAM RESEARCH CORPLRCX | 20 funds | $1.2B |
| BOOKING HOLDINGS INCBKNG | 20 funds | $1.2B |
| BANK OF AMERICA CORPBAC | 20 funds | $1.1B |
| CAPITAL ONE FINANCIAL CORPCOF | 20 funds | $1.1B |
Ranked by how many of MNTK's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 11, 2026 | Copelyn John A | Director | Buy (P) | 18K | $25K |
| Nov 28, 2022 | McClain Sean F | President and CEO, Director | Sell (S) | 58K | $697K |
| Nov 28, 2022 | McClain Sean F | President and CEO, Director | Sell (S) | 2K | $29K |
| Nov 28, 2022 | Hill Scott E | VP of Business Development | Sell (S) | 102K | $1.2M |
| Nov 28, 2022 | Hill Scott E | VP of Business Development | Sell (S) | 2K | $30K |
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/MNTK/capital-change-brief"
Use Arkolith's capital_change_brief for MNTK. 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 MNTK. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.