Who owns Myriad Genetics, Inc. (MYGN)
Which tracked institutional funds hold MYGN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MYGN company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
21 tracked funds added or opened MYGN while 58 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
MYGN’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes MYGN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in MYGN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 202 tracked filers holding MYGN, 106 increased or opened the position and 119 reduced or closed it; over the same quarter, open-market insider Form 4s were net purchases.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in MYGN between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 8
- VANGUARD CAPITAL MANAGEMENT LLC$18M
- VANGUARD PORTFOLIO MANAGEMENT LLC$12M
- VANGUARD FIDUCIARY TRUST CO$3M
- MOORE CAPITAL MANAGEMENT, LP$983K
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$921K
- Vanguard Global Advisers, LLC$825K
Full exits 9
- VANGUARD GROUP INC$45M
- Walleye Capital LLC$4M
- ROYCE & ASSOCIATES LP$4M
- PRINCIPAL FINANCIAL GROUP INC$3M
- TWO SIGMA ADVISERS, LP$2M
- PUBLIC SECTOR PENSION INVESTMENT BOARD$2M
Largest adds
- HRT FINANCIAL LP$5M
- JANE STREET GROUP, LLC$5M
- MARSHALL WACE, LLP$4M
- ACADIAN ASSET MANAGEMENT LLC$4M
- Qube Research & Technologies Ltd$2M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$1M
Largest trims
- BlackRock, Inc.$54M
- STATE STREET CORP$17M
- MILLENNIUM MANAGEMENT LLC$11M
- MORGAN STANLEY$8M
- D. E. Shaw & Co., Inc.$7M
- DIMENSIONAL FUND ADVISORS LP$5M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 8,889,644 | $40M | 6.8% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 6,668,817 | $30M | 5.1% | 2026-Q1 |
| GLENVIEW CAPITAL MANAGEMENT, LLC added | 5,411,978 | $24M | 4.2% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 4,499,724 | $20M | 3.5% | 2026-Q1 |
| STATE STREET CORP trimmed | 4,424,027 | $20M | 3.4% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 3,924,525 | $18M | 3.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 3,168,742 | $14M | 2.4% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,582,231 | $12M | 2.0% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 2,366,092 | $11M | 1.8% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,319,379 | $10M | 1.8% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 2,308,589 | $10M | 1.8% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 2,088,492 | $9M | 1.6% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 1,976,166 | $9M | 1.5% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC added | 1,885,735 | $8M | 1.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,801,478 | $8M | 1.4% | 2026-Q1 |
| HRT FINANCIAL LP added | 1,786,319 | $8M | 1.4% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 1,690,461 | $8M | 1.3% | 2026-Q1 |
| Vestal Point Capital, LP added | 1,648,000 | $7M | 1.3% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 1,446,961 | $7M | 1.1% | 2026-Q1 |
| Connor, Clark & Lunn Investment Management Ltd. added | 1,318,663 | $6M | 1.0% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,284,050 | $6M | 1.0% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 1,202,531 | $5M | 0.9% | 2026-Q1 |
| Fisher Asset Management, LLC trimmed | 1,190,896 | $5M | 0.9% | 2026-Q1 |
| Aberdeen Group plc added | 1,110,404 | $5M | 0.9% | 2026-Q1 |
| MARSHALL WACE, LLP added | 1,008,380 | $5M | 0.8% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 990,646 | $4M | 0.8% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 957,901 | $4M | 0.7% | 2026-Q1 |
| Nuveen, LLC trimmed | 918,963 | $4M | 0.7% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 739,051 | $3M | 0.6% | 2026-Q1 |
| UBS Group AG added | 703,167 | $3M | 0.5% | 2026-Q1 |
| Y-Intercept (Hong Kong) Ltd added | 654,224 | $3M | 0.5% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 615,765 | $3M | 0.5% | 2026-Q1 |
| FMR LLC added | 585,277 | $3M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 523,020 | $2M | 0.4% | 2026-Q1 |
| Squarepoint Ops LLC added | 516,996 | $2M | 0.4% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 502,931 | $2M | 0.4% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 454,374 | $2M | 0.3% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 453,042 | $2M | 0.3% | 2026-Q1 |
| Trexquant Investment LP trimmed | 406,102 | $2M | 0.3% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD added | 402,518 | $2M | 0.3% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 381,123 | $2M | 0.3% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC trimmed | 364,154 | $2M | 0.3% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 363,822 | $2M | 0.3% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 362,692 | $2M | 0.3% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 339,902 | $2M | 0.3% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 334,513 | $2M | 0.3% | 2026-Q1 |
| NORDEA INVESTMENT MANAGEMENT AB trimmed | 341,483 | $1M | 0.3% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 323,519 | $1M | 0.2% | 2026-Q1 |
| Invesco Ltd. trimmed | 290,841 | $1M | 0.2% | 2026-Q1 |
| Man Group plc added | 278,202 | $1M | 0.2% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 267,328 | $1M | 0.2% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 263,865 | $1M | 0.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 233,748 | $1M | 0.2% | 2026-Q1 |
| MOORE CAPITAL MANAGEMENT, LP added | 218,398 | $983K | 0.2% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 204,608 | $921K | 0.2% | 2026-Q1 |
| Swiss National Bank | 183,400 | $825K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 183,368 | $825K | 0.1% | 2026-Q1 |
| Weiss Asset Management LP new | 174,844 | $787K | 0.1% | 2026-Q1 |
| OP Asset Management Ltd added | 148,929 | $775K | 0.1% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 171,352 | $769K | 0.1% | 2026-Q1 |
| MARTINGALE ASSET MANAGEMENT L P added | 165,427 | $744K | 0.1% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 154,901 | $697K | 0.1% | 2026-Q1 |
| IEQ CAPITAL, LLC trimmed | 150,242 | $676K | 0.1% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 138,146 | $622K | 0.1% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD trimmed | 138,000 | $621K | 0.1% | 2026-Q1 |
| Voleon Capital Management LP added | 137,241 | $618K | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. | 99,450 | $612K | 0.1% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO trimmed | 132,383 | $596K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 117,591 | $529K | 0.1% | 2026-Q1 |
| Rafferty Asset Management, LLC trimmed | 117,014 | $527K | 0.1% | 2026-Q1 |
| Inspire Investing, LLC added | 115,726 | $521K | 0.1% | 2026-Q1 |
| Engineers Gate Manager LP added | 114,799 | $517K | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 110,486 | $496K | 0.1% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 106,283 | $478K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 7,376,535 | $45M | 7.8% | 2025-Q4 stale |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 4,592,264 | $41M | 7.0% | 2025-Q1 stale |
| EARNEST PARTNERS LLC added | 3,977,292 | $35M | 6.0% | 2025-Q1 stale |
| Artisan Partners Limited Partnership trimmed | 2,277,256 | $20M | 3.5% | 2025-Q1 stale |
| Camber Capital Management LP trimmed | 2,000,000 | $11M | 1.8% | 2025-Q2 stale |
| Kent Lake PR LLC new | 1,250,000 | $7M | 1.1% | 2025-Q2 stale |
| Portolan Capital Management, LLC added | 1,163,400 | $6M | 1.1% | 2025-Q2 stale |
| Walleye Capital LLC added | 677,176 | $4M | 0.7% | 2025-Q4 stale |
| DISCIPLINED GROWTH INVESTORS INC /MN trimmed | 753,956 | $4M | 0.7% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC added | 531,161 | $4M | 0.7% | 2025-Q3 stale |
| ROYCE & ASSOCIATES LP trimmed | 605,000 | $4M | 0.6% | 2025-Q4 stale |
| Anson Funds Management LP trimmed | 504,382 | $4M | 0.6% | 2025-Q3 stale |
| AMH Equity Ltd added | 400,000 | $3M | 0.5% | 2025-Q3 stale |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 444,148 | $3M | 0.5% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 340,200 | $2M | 0.4% | 2025-Q4 stale |
| PUBLIC SECTOR PENSION INVESTMENT BOARD trimmed | 322,415 | $2M | 0.3% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP added | 313,370 | $2M | 0.3% | 2025-Q4 stale |
| NATIXIS ADVISORS, LLC added | 212,138 | $2M | 0.3% | 2025-Q1 stale |
| Jump Financial, LLC added | 168,597 | $1M | 0.2% | 2025-Q4 stale |
| Janney Montgomery Scott LLC trimmed | 132,213 | $956K | 0.2% | 2025-Q3 stale |
| Knott David M Jr added | 180,000 | $956K | 0.2% | 2025-Q2 stale |
| Verition Fund Management LLC added | 129,521 | $936K | 0.2% | 2025-Q3 stale |
| ENVESTNET ASSET MANAGEMENT INC added | 77,363 | $686K | 0.1% | 2025-Q1 stale |
| SEGALL BRYANT & HAMILL, LLC | 72,117 | $640K | 0.1% | 2025-Q1 stale |
| JENNISON ASSOCIATES LLC added | 60,811 | $539K | 0.1% | 2025-Q1 stale |
| Aquatic Capital Management LLC added | 82,579 | $508K | 0.1% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.