Who owns QUEST DIAGNOSTICS INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of DGX from SEC Form 13F filings across 1,105 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 1,105 institutions disclosed 104.9M shares of QUEST DIAGNOSTICS INC worth $22.20B — about 94.5% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
1,105
13F holders
$22.20B
value, 2026 filers
94.5%
of shares outstanding (104.9M sh)
142
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of DGX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 9.3M | $1.97B | 0.0% | 8.4% | +1.1% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 7.2M | $1.53B | 0.0% | 6.5% | +1.2% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 6.1M | $1.30B | 0.1% | 5.5% | +0.8% |
| 4 | STATE STREET CORP | 5.5M | $1.17B | 0.0% | 5% | +2.5% |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | 5.4M | $1.15B | 0.1% | 4.9% | -13.5% |
| 6 | Boston Partners | 4.7M | $1.00B | 0.9% | 4.3% | +18.3% |
| 7 | JPMORGAN CHASE & CO | 3.5M | $748.6M | 0.0% | 3.2% | -8.5% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 3.1M | $662.6M | 0.0% | 2.8% | +1.7% |
| 9 | MORGAN STANLEY | 2.5M | $521.5M | 0.0% | 2.2% | -0.8% |
| 10 | EdgePoint Investment Group Inc. | 2.2M | $476.4M | 3.6% | 2% | +0.2% |
| 11 | DIMENSIONAL FUND ADVISORS LP | 2.0M | $421.4M | 0.1% | 1.8% | +2.0% |
| 12 | BANK OF AMERICA CORP /DE/ | 1.9M | $410.2M | 0.0% | 1.7% | +10.4% |
| 13 | Grantham, Mayo, Van Otterloo & Co. LLC | 1.9M | $400.2M | 0.9% | 1.7% | +0.3% |
| 14 | WELLS FARGO & COMPANY/MN | 1.8M | $371.2M | 0.1% | 1.6% | -0.7% |
| 15 | Davis Selected Advisers | 1.6M | $329.8M | 1.4% | 1.4% | -3.8% |
| 16 | VICTORY CAPITAL MANAGEMENT INC | 1.6M | $328.6M | 0.2% | 1.4% | -16.0% |
| 17 | NORGES BANKNEW | 1.4M | $298.1M | 0.0% | 1.3% | new |
| 18 | FMR LLC | 1.4M | $296.5M | 0.0% | 1.3% | +48.5% |
| 19 | Invesco Ltd. | 1.4M | $292.3M | 0.0% | 1.2% | -15.8% |
| 20 | NORTHERN TRUST CORP | 1.1M | $239.0M | 0.0% | 1% | +1.2% |
| 21 | GOLDMAN SACHS GROUP INC | 982,694 | $208.3M | 0.0% | 0.9% | -27.1% |
| 22 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 942,407 | $199.7M | 0.0% | 0.8% | +11.3% |
| 23 | UBS Group AG | 888,906 | $188.4M | 0.0% | 0.8% | +26.6% |
| 24 | AMERICAN CENTURY COMPANIES INC | 818,220 | $173.4M | 0.1% | 0.7% | -5.7% |
| 25 | M&G PLC | 795,650 | $168.7M | 0.8% | 0.7% | -1.2% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.