Stock Ownership/DGX

QUEST DIAGNOSTICS INC (DGX): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in DGX · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
23
13F filers
Aggregate Value
$1.3B
Across holders
Last Price
$243.87
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity13 increased10 reduced3 exited
Full exits: MAVERICK CAPITAL LTD, TUDOR INVESTMENT CORP ET AL, ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Institutional Holders of DGX
↗
23 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
EdgePoint Investment Group Inc.
CIK 0001481669
Hedge Fund2.25M$476.4M36.4%3.6%Added+$784KQ2 2026
Grantham, Mayo, Van Otterloo & Co. LLC
CIK 0001352662
Institutional Manager1.89M$400.2M30.5%0.9%Added+$1.1MQ2 2026
Woodline Partners LP
CIK 0001784547
Hedge Fund486K$103.0M7.9%0.3%Reduced$-22.9MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund343K$72.8M5.6%0.1%Reduced$-82.9MQ2 2026
BALYASNY ASSET MANAGEMENT LLC
CIK 0001218710
Hedge Fund275K$58.4M4.5%0.1%Added+$57.8MQ2 2026
MARSHALL WACE, LLP
CIK 0001318757
Hedge Fund270K$57.2M4.4%0.0%Added+$48.7MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund133K$28.2M2.2%0.0%Reduced$-19.7MQ2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund118K$25.0M1.9%0.0%Reduced$-48.3MQ2 2026
Gotham Asset Management, LLC
CIK 0001510387
Hedge Fund118K$24.9M1.9%0.1%Reduced$-2.8MQ2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
Hedge Fund106K$22.5M1.7%0.0%Added—Q2 2026
EdgePoint Investment Group Inc.Added
Hedge Fund
$476.4M· 36.4% of total· 3.6% port· 2.25M sh· +$784K QoQ· Q2 2026
Grantham, Mayo, Van Otterloo & Co. LLCAdded
Institutional Manager
$400.2M· 30.5% of total· 0.9% port· 1.89M sh· +$1.1M QoQ· Q2 2026
Woodline Partners LPReduced
Hedge Fund
$103.0M· 7.9% of total· 0.3% port· 486K sh· $-22.9M QoQ· Q2 2026
Qube Research & Technologies LtdReduced
Hedge Fund
$72.8M· 5.6% of total· 0.1% port· 343K sh· $-82.9M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$58.4M· 4.5% of total· 0.1% port· 275K sh· +$57.8M QoQ· Q2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$57.2M· 4.4% of total· 0.0% port· 270K sh· +$48.7M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$28.2M· 2.2% of total· 0.0% port· 133K sh· $-19.7M QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$25.0M· 1.9% of total· 0.0% port· 118K sh· $-48.3M QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$24.9M· 1.9% of total· 0.1% port· 118K sh· $-2.8M QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Added
Hedge Fund
$22.5M· 1.7% of total· 0.0% port· 106K sh· — QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$12.9M· 1.0% of total· 0.0% port· 61K sh· +$12.9M QoQ· Q2 2026
TCW GROUP INCAdded
Hedge Fund
$7.3M· 0.6% of total· 0.0% port· 34K sh· +$761K QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$6.2M· 0.5% of total· 0.0% port· 29K sh· $-10.3M QoQ· Q2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$5.0M· 0.4% of total· 0.0% port· 23K sh· — QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$3.3M· 0.3% of total· 0.0% port· 16K sh· +$2.9M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$2.4M· 0.2% of total· 0.0% port· 11K sh· $-8.2M QoQ· Q2 2026
First Eagle Investment Management, LLCAdded
Institutional Manager
$1.6M· 0.1% of total· 0.0% port· 8K sh· +$340K QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$1.0M· 0.1% of total· 0.0% port· 5K sh· $-30.3M QoQ· Q2 2026
Bridgewater Associates, LPAdded
Hedge Fund
$796K· 0.1% of total· 0.0% port· 4K sh· +$60K QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCAdded
Hedge Fund
$601K· 0.0% of total· 0.0% port· 3K sh· — QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$495K· 0.0% of total· 0.0% port· 2K sh· $-35.2M QoQ· Q2 2026
Ancora Advisors, LLCReduced
Hedge Fund
$29K· 0.0% of total· 0.0% port· 137 sh· $-52K QoQ· Q2 2026
Walleye Capital LLCReduced
Hedge Fund
$19K· 0.0% of total· 0.0% port· 88 sh· $-214K QoQ· Q2 2026
1–10 of 23
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