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Quest Diagnostics

XNYS · SERVICES-MEDICAL LABORATORIES

5 articles20 insider tx20 holders0 supply chain5 selling intent filings0 new insiders

Research articles

Includes notes from domestic 8-K and foreign private issuer 6-K disclosures.

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Recent insider activity

Insider net $ (monthly)open-market Form 4 only - grants, exercises, tax withholding excluded$20.0M$10.0M$0-$10.0M-$20.0M2024-10 -$279K2024-11 -$14.0M2024-12 $02025-01 $02025-02 -$907K2025-03 -$2.0M2025-04 -$7.0M2025-05 -$307K2025-06 $02025-07 -$1.8M2025-08 -$2.5M2025-09 -$5.4M2025-10 -$270K2025-11 -$12.3M2025-12 $02026-01 $02026-02 -$7.3M2026-03 -$5.5M2026-04 $02026-05 $02026-06 -$3.6M2026-07 -$376K2026-08 -$5.5M2026-09 -$2.4MInstitutional shares (majority-gated quarters)50.0M25.0M02025-Q4 40.2M sh2026-Q1 23.9M sh2026-Q2 23.5M shOct 24Dec 24Feb 25Apr 25Jun 25Aug 25Oct 25Dec 25Feb 26Apr 26Jun 26Aug 26Q4 2025Q1 2026Q2 2026~ derived from SEC-reported shares x price. Hatched: excluded (implausible price) or unpriced.

open-market Form 4 only - grants, exercises, tax withholding excluded

0 buyers - 3 unique sellers · 6 accumulating - 5 trimming - 1 unchanged

Date Insider Title Type Shares Price Value
September 1, 2026 Davis J. E. CEO and President SELL -10,000 $243 ~$2.4M
August 28, 2026 Prevoznik Michael E SVP & General Counsel OPTION_EXERCISE 22,677 $112 ~$2.5M
August 28, 2026 Prevoznik Michael E SVP & General Counsel SELL -16,010 $243 ~$3.9M
August 28, 2026 Prevoznik Michael E SVP & General Counsel SELL -6,237 $244 ~$1.5M
August 28, 2026 Prevoznik Michael E SVP & General Counsel SELL -430 $245 ~$0.1M
August 28, 2026 Prevoznik Michael E SVP & General Counsel GIFT -1,000 — —
August 28, 2026 Prevoznik Michael E SVP & General Counsel OPTION_EXERCISE -22,677 $112 ~$2.5M
July 28, 2026 Delaney Mark E SVP & Chief Commercial Officer SELL -1,600 $235 ~$0.4M
July 22, 2026 Kuppusamy Karthik SVP, Clinical Solutions OTHER 37 $207 ~$8K
July 22, 2026 Carter Robert B — OTHER 11 $207 ~$2K
July 22, 2026 Gregg Vicky B — GRANT 72 $207 ~$15K
July 22, 2026 Plewman Patrick SVP for Diagnostic Services OTHER 46 $207 ~$10K
July 22, 2026 Main Timothy L — OTHER 21 $207 ~$4K
July 22, 2026 Samad Sam Executive Vice President & CFO GRANT 102 $207 ~$21K
July 22, 2026 Lassiter Wright III — OTHER 6 $207 ~$1K
July 22, 2026 Delaney Mark E SVP & Chief Commercial Officer OTHER 34 $207 ~$7K
July 1, 2026 Wentworth Timothy C — GRANT 144 — —
June 4, 2026 Kuppusamy Karthik SVP, Clinical Solutions OPTION_EXERCISE 3,320 $128 ~$0.4M
June 4, 2026 Kuppusamy Karthik SVP, Clinical Solutions OPTION_EXERCISE 4,827 $122 ~$0.6M
June 4, 2026 Kuppusamy Karthik SVP, Clinical Solutions SELL -8,147 $200 ~$1.6M

Insider Selling Intent (Form 144)

Date Filer Relationship Est. shares Filing
September 1, 2026 Davis J. E. — 10,000 SEC
August 28, 2026 Prevoznik Michael E — 22,677 SEC
July 28, 2026 Delaney Mark E — 1,600 SEC
June 4, 2026 Kuppusamy Karthik — 8,147 SEC
June 1, 2026 Davis J. E. — 10,000 SEC

Institutional holdings

Institution Shares Value ($) Change % Filing date
Vanguard Group 14,392,082 ~$2.5B — January 29, 2026
BlackRock 9,275,411 ~$2.0B 1.1% August 7, 2026
BlackRock 9,172,292 ~$1.8B -3.0% May 13, 2026
BlackRock 9,459,218 ~$1.6B — February 12, 2026
BlackRock 10,059,403 ~$1.4B — August 13, 2024
State Street 5,516,643 ~$1.2B 2.5% August 7, 2026
State Street 5,380,821 ~$1.1B -0.0% May 15, 2026
State Street 5,382,547 ~$934.0M — February 13, 2026
JP Morgan Chase 3,846,456 ~$758.4M -7.2% May 13, 2026
JP Morgan Chase 3,520,438 ~$748.6M -8.5% August 12, 2026
JP Morgan Chase 4,145,896 ~$719.4M — February 11, 2026
Morgan Stanley 2,460,497 ~$521.5M -0.8% August 13, 2026
Morgan Stanley 2,479,720 ~$486.0M -7.9% May 15, 2026
Morgan Stanley 2,693,568 ~$467.4M — May 27, 2026
Goldman Sachs 1,762,925 ~$305.9M — March 25, 2026
Fidelity (FMR) 1,398,735 ~$296.5M 48.5% August 13, 2026
Goldman Sachs 1,348,694 ~$264.3M -23.5% May 15, 2026
Fidelity (FMR) 1,202,254 ~$208.6M — February 17, 2026
Goldman Sachs 982,694 ~$208.3M -27.1% August 14, 2026
Fidelity (FMR) 942,218 ~$184.7M -21.6% May 15, 2026
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