Among active 13F managers last quarter, 10 opened and 13 added, while 9 reduced; the largest holder to move was American Century Companies Inc (−0.1%). Over the last 180 days, 1 insider bought and none sold, a net +$25K in open-market trades.
Funds lean in and no leg opposes.
90 tracked 13F filers disclose a position in MNTK as of the latest SEC 13F filings, a combined $30.1M 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 | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 4.7M | $7.3M | ▲+12% Added · +491K sh | Q2 2026 | |
| 2 | Vanguard Capital Management LLC | 2.7M | $4.2M | ▲+0.7% Added · +18K sh | Q2 2026 | |
| 3 | Geode Capital Management, LLC | 1.9M | $2.9M | ▲+6.8% Added · +120K sh | Q2 2026 | |
| 4 | Baader Bank Aktiengesellschaft | 1.6M | $2.5M | —Held | Q2 2026 | |
| 5 | State Street Corp | 1.4M | $2.1M | ▲+0.3% Added · +4K sh | Q2 2026 | |
| 6 | Barclays PLC | 1.0M | $1.2M | ▲+850% Added · +930K sh | Q1 2026 | |
| 7 | American Century Companies Inc | 954K | $1.1M | ▼−0.1% Reduced · −643 sh | Q1 2026 | |
| 8 | Dimensional Fund Advisors LP | 737K | $847K | ▼−12% Reduced · −96K sh | Q1 2026 | |
| 9 | Charles Schwab Investment Management Inc | 521K | $599K | ▼−4.4% Reduced · −24K sh | Q1 2026 | |
| 10 | Northern Trust Corp | 505K | $581K | ▲+8.5% Added · +40K sh | Q1 2026 | |
| 11 | Vanguard Portfolio Management LLC | 469K | $732K | ▲+21% Added · +80K sh | Q2 2026 | |
| 12 | Vanguard Fiduciary Trust Co | 439K | $684K | ▲+1.5% Added · +7K sh | Q2 2026 | |
| 13 | Hosking Partners LLP | 391K | $609K | ▼−1.6% Reduced · −6K sh | Q2 2026 | |
| 14 | Renaissance Technologies LLC | 355K | $408K | ▲+3.5% Added · +12K sh | Q1 2026 | |
| 15 | Goldman Sachs Group Inc | 331K | $381K | ▲+69% Added · +135K sh | Q1 2026 | |
| 16 | First Trust Advisors LP | 312K | $359K | ▼−7.8% Reduced · −26K sh | Q1 2026 | |
| 17 | Morgan Stanley | 261K | $301K | ▼−20% Reduced · −67K sh | Q1 2026 | |
| 18 | Millennium Management LLC | 207K | $238K | ▲+706% Added · +181K sh | Q1 2026 | |
| 19 | Marshall Wace, LLP | 205K | $235K | ▲New +205K sh | Q1 2026 | |
| 20 | Bank of New York Mellon Corp | 196K | $225K | ▼−6.5% Reduced · −14K sh | Q1 2026 | |
| 21 | JPMorgan Chase & Co | 162K | $193K | ▼−5.8% Reduced · −10K sh | Q1 2026 | |
| 22 | Nuveen, LLC | 140K | $161K | ▲+0.6% Added · +858 sh | Q1 2026 | |
| 23 | Caprock Group, LLC | 120K | $187K | ▲New +120K sh | Q2 2026 | |
| 24 | D. E. Shaw & Co., Inc. | 118K | $136K | ▼−39% Reduced · −74K sh | Q1 2026 | |
| 25 | J. Derek Lewis & Associates Inc. | 107K | $166K | ▲+25% Added · +22K sh | Q2 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, 10 funds opened a new position in MNTK and 13 added to an existing one, while 9 reduced. 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 | Their position there |
|---|---|---|
| Alphabet Inc-CL CGOOG | 40 funds | $62.2B |
| Visa Inc-Class A SharesV | 40 funds | $26.3B |
| JPMorgan Chase & CoJPM | 40 funds | $24.8B |
| Nvidia CorpNVDA | 39 funds | $172.6B |
| Apple IncAAPL | 39 funds | $119.9B |
| Amazon.com IncAMZN | 39 funds | $82.4B |
| Alphabet Inc-CL AGOOGL | 39 funds | $76.7B |
| Broadcom IncAVGO | 39 funds | $75.6B |
| Eli Lilly & CoLLY | 39 funds | $36.9B |
| Micron Technology IncMU | 39 funds | $28.6B |
| Tesla IncTSLA | 39 funds | $28.3B |
| Lam Research CorpLRCX | 39 funds | $21.6B |
Ranked by how many of MNTK's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MNTK.
| 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) 2 lots, same day | 60K | $726K |
| Nov 28, 2022 | Hill Scott E | VP of Business Development | Sell (S) 2 lots, same day | 104K | $1.3M |
One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 32 | 27 | – |
Insiders Form 4 open-market | 1 | 0 | +$25K |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for MNTK
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.