Among active 13F managers last quarter, 7 opened and 31 added, while 14 reduced; the largest holder to move was Vestal Point Capital, LP (+248%). Over the last 180 days, 1 insider sold and 1 insider bought, a net -$39K in open-market trades.
The legs disagree, or only one of them leans.
178 tracked 13F filers disclose a position in MYGN as of the latest SEC 13F filings, a combined $429.6M 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. | 10.9M | $62.2M | ▲+23% Added · +2.0M sh | Q2 2026 | |
| 2 | Millennium Management LLC | 6.7M | $30.0M | ▼−0.5% Reduced · −31K sh | Q1 2026 | |
| 3 | Vestal Point Capital, LP | 5.7M | $32.7M | ▲+248% Added · +4.1M sh | Q2 2026 | |
| 4 | State Street Corp | 5.0M | $28.5M | ▲+13% Added · +561K sh | Q2 2026 | |
| 5 | D. E. Shaw & Co., Inc. | 4.5M | $20.2M | ▼−0.1% Reduced · −5K sh | Q1 2026 | |
| 6 | Vanguard Capital Management LLC | 4.1M | $23.3M | ▲+4.0% Added · +157K sh | Q2 2026 | |
| 7 | Morgan Stanley | 3.2M | $14.3M | ▼−12% Reduced · −439K sh | Q1 2026 | |
| 8 | Vanguard Portfolio Management LLC | 3.1M | $17.6M | ▲+19% Added · +497K sh | Q2 2026 | |
| 9 | Geode Capital Management, LLC | 2.4M | $13.8M | ▲+4.2% Added · +97K sh | Q2 2026 | |
| 10 | Goldman Sachs Group Inc | 2.4M | $10.6M | ▲+9.5% Added · +206K sh | Q1 2026 | |
| 11 | Federated Hermes, Inc. | 2.0M | $8.9M | ▲+51% Added · +666K sh | Q1 2026 | |
| 12 | AQR Capital Management LLC | 1.9M | $8.6M | ▲+2.2% Added · +42K sh | Q1 2026 | |
| 13 | Jacobs Levy Equity Management, Inc | 1.9M | $10.8M | ▼−9.4% Reduced · −197K sh | Q2 2026 | |
| 14 | Charles Schwab Investment Management Inc | 1.8M | $8.1M | ▲+2.7% Added · +48K sh | Q1 2026 | |
| 15 | Qube Research & Technologies Ltd | 1.7M | $7.6M | ▲+94% Added · +817K sh | Q1 2026 | |
| 16 | Citadel Advisors LLC | 1.5M | $8.8M | ▲+239% Added · +1.1M sh | Q2 2026 | |
| 17 | Connor, Clark & Lunn Investment Management Ltd. | 1.4M | $8.0M | ▲+6.8% Added · +89K sh | Q2 2026 | |
| 18 | Two Sigma Investments, LP | 1.3M | $5.8M | ▲+40% Added · +369K sh | Q1 2026 | |
| 19 | Jane Street Group, LLC | 1.2M | $5.4M | ▲22× Added · +1.1M sh | Q1 2026 | |
| 20 | Fisher Asset Management, LLC | 1.2M | $5.4M | ▼−1.3% Reduced · −16K sh | Q1 2026 | |
| 21 | Aberdeen Group plc | 1.1M | $5.0M | ▲+25% Added · +225K sh | Q1 2026 | |
| 22 | Marshall Wace, LLP | 1.1M | $5.0M | ▲49× Added · +1.1M sh | Q1 2026 | |
| 23 | Northern Trust Corp | 991K | $4.5M | ▼−12% Reduced · −136K sh | Q1 2026 | |
| 24 | Nuveen, LLC | 919K | $4.1M | ▼−23% Reduced · −272K sh | Q1 2026 | |
| 25 | Man Group plc | 909K | $5.2M | ▲+227% Added · +631K 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, 7 funds opened a new position in MYGN and 31 added to an existing one, while 14 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 |
|---|---|---|
| Nvidia CorpNVDA | 97 funds | $332.1B |
| Microsoft CorpMSFT | 97 funds | $213.9B |
| Amazon.com IncAMZN | 97 funds | $164.4B |
| Meta Platforms Inc-Class AMETA | 94 funds | $86.0B |
| Visa Inc-Class A SharesV | 94 funds | $47.0B |
| Alphabet Inc-CL AGOOGL | 93 funds | $147.5B |
| Broadcom IncAVGO | 93 funds | $135.4B |
| Eli Lilly & CoLLY | 93 funds | $68.6B |
| Wells Fargo & CoWFC | 93 funds | $14.9B |
| Lockheed Martin CorpLMT | 93 funds | $7.3B |
| 3M CoMMM | 93 funds | $5.5B |
| JPMorgan Chase & CoJPM | 92 funds | $52.5B |
Ranked by how many of MYGN's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MYGN.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 8, 2026 | Kumar Rashmi | Director | Sell (S) | 15K | $67K |
| May 14, 2026 | Bisaro Paul | Director | Buy (P) | 8K | $28K |
| Mar 9, 2026 | Raha Samraat S. | President and CEO, Director | Buy (P) | 40K | $200K |
| Feb 27, 2026 | Phanstiel S. Louise | Director | Buy (P) | 48K | $224K |
| Feb 26, 2026 | Phanstiel S. Louise | Director | Buy (P) | 50K | $242K |
| Feb 25, 2026 | Phanstiel S. Louise | Director | Buy (P) | 6K | $29K |
| Oct 11, 2024 | Diaz Paul J | President and CEO, Director | Sell (S) | 15K | $344K |
| Sep 11, 2024 | Diaz Paul J | President and CEO, Director | Sell (S) | 15K | $401K |
| Sep 11, 2024 | Muzzey Dale | Chief Scientific Officer | Sell (S) | 2K | $55K |
| Sep 9, 2024 | Dreismann Heinrich | Director | Sell (S) | 10K | $271K |
| Sep 3, 2024 | Reitan Colleen F | Director | Sell (S) | 46K | $1.3M |
| Aug 21, 2024 | Ancona Margaret | SVP, Chief of Staff | Sell (S) | 12K | $321K |
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 | 56 | 32 | – |
Insiders Form 4 open-market | 1 | 1 | -$39K |
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 MYGN
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/MYGN/capital-change-brief"
Use Arkolith's capital_change_brief for MYGN. 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 MYGN. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.