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DGX · Quest Diagnostics Inc

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Market Cap
$26.79B
Shares
110.37M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,100
Total Value: $22,361,825,361
Total Shares: 105,505,235
Showing 1–100 of 1,114 holdings by value · page 1 of 12

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 1,100 13F filers · Δ vs Mar 31, 2026
Top Holder
8.8%
Sep 2023 → Jun 2026 · range 8.8% – 14.2%
−0.1 pts
Top 5
31.8%
Sep 2023 → Jun 2026 · range 31.8% – 38.5%
−1.2 pts
Top 10
47.1%
Sep 2023 → Jun 2026 · range 47.1% – 51.4%
−1.1 pts
HHI
298
Sep 2023 → Jun 2026 · range 298 – 432
Broadly held−13

Quarterly Activity

vs Mar 31, 2026
New
119
Increased
429
Decreased
347
Sold Out
91
Unchanged
205
Holder count: +28
Institutional value: +10.6%
Shares held: +2.2%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 1,114
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1022079 CUSIP 74834L100 13F (30d) 724 filings 699 filers Visit website Investor relations