QUEST DIAGNOSTICS INC (DGX) Stock Institutional Trading Activity


QUEST DIAGNOSTICS INC (DGX) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q3 2025), investors with some of the largest reported share count changes include First Eagle U.S. Value, Sequoia Financial Advisors, Olstein Capital Management, Causeway Capital Management, and Renaissance Technologies LLC. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2023Renaissance Technologies LLCSell-99,937537,663$65,520
Q3 2023First Eagle U.S. ValueBuy1783,849$469,039
Q3 2023Causeway Capital ManagementBuy181,201489,694$59,674,164
Q2 2023Olstein Capital ManagementBuy11,00066,000$9,277
Q2 2023Renaissance Technologies LLCSell-33,800637,600$89,621
Q2 2023Causeway Capital ManagementBuy2,991308,493$43,361,828
Q1 2023Olstein Capital ManagementBuy9,00055,000$7,781
Q1 2023Renaissance Technologies LLCSell-296,500671,400$94,990
Q1 2023First Eagle U.S. ValueBuy3,3973,671$519,373
Q4 2022Olstein Capital ManagementSell-41,00046,000$7,196
Q4 2022First Eagle U.S. ValueSell-25274$42,865
Q4 2022Renaissance Technologies LLCBuy96,000967,900$151,418
Q3 2022First Eagle U.S. ValueBuy168299$37
Q3 2022Olstein Capital ManagementBuy19,60087,000$7,122
Q3 2022Renaissance Technologies LLCSell-249,400871,900$106,973
Q2 2022Olstein Capital ManagementSell-7,60067,400$8,963
Q2 2022Renaissance Technologies LLCSell-10,6001,121,300$149,110
Q1 2022First Eagle U.S. ValueBuy131131$18
Q1 2022Olstein Capital ManagementBuy33,00075,000$10,265
Q1 2022Renaissance Technologies LLCSell-185,8001,131,900$154,912
Q1 2022Hancock Classic ValueSell-427,7341,966$269
Q4 2021Olstein Capital ManagementSell-18,00042,000$7,266
Q4 2021Renaissance Technologies LLCBuy350,4001,317,700$227,975
Q3 2021Olstein Capital ManagementSell-2,00060,000$8,719
Q3 2021Renaissance Technologies LLCBuy779,000967,300$140,558
Q2 2021Renaissance Technologies LLCSell-80,400188,300$24,850
Q2 2021Causeway Capital ManagementSell-14,070305,502$40,317
Q1 2021Olstein Capital ManagementBuy22,00062,000$7,957
Q1 2021Renaissance Technologies LLCSell-354,100268,700$34,485
Q1 2021Causeway Capital ManagementBuy319,572319,572$41,014

Frequently asked questions about DGX activity

  • Which institutional owners are buying DGX?

    Institutional owners buying DGX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in DGX activity?

    "Buy" means an investor increased their reported position in DGX compared to the prior reporting period. This reflects growing exposure to QUEST DIAGNOSTICS INC (DGX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in DGX increasing?

    Institutional interest in DGX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.