SEC Form 4 · Updated Daily

DGX

— QUEST DIAGNOSTICS INCORPORATED Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

Financials Ownership

Current Reporting Owners

Owner	Role	Shares Owned	As Of	Last Activity
Davis J. E.	Director · Officer	122,423	2026-09-01	S
Doherty Catherine T.	Officer	67,122	2026-03-05	S
PREVOZNIK MICHAEL E	Officer	36,557	2026-08-28	G
SAMAD SAM	Officer	33,478	2026-07-22	A
RING TIMOTHY M	Director	31,140	2026-05-20	A
PFEIFFER GARY M	Director	31,005	2026-05-20	A
MAIN TIMOTHY L	Director	22,460	2026-07-22	L
Gregg Vicky B	Director	18,386	2026-07-22	A
Plewman Patrick	Officer	15,293	2026-07-22	L
KUPPUSAMY KARTHIK	Officer	13,557	2026-07-22	L
MORRISON DENISE M	Director	11,929	2026-05-20	A
DELANEY MARK E	Officer	10,335	2026-07-28	S
Lassiter Wright III	Director	10,323	2026-07-22	L
Doi Tracey	Director	7,748	2026-05-20	A
Diaz Luis	Director	5,196	2026-05-20	A
CARTER ROBERT B	Director	3,864	2026-07-22	L
WENTWORTH TIMOTHY C	Director	1,358	2026-05-20	A

Recent Filings

Date	Owner	Activity	Shares	Price	Owned After
2026-09-01	Davis J. E.	Open-market sale	10,000	$242.72	122,423
2026-08-28	PREVOZNIK MICHAEL E	Option exercise (derivative)	22,677	$112.17	0
2026-08-28	PREVOZNIK MICHAEL E	Gift	1,000	$0.00	36,557
2026-08-28	PREVOZNIK MICHAEL E	Open-market sale	430	$244.51	37,557
2026-08-28	PREVOZNIK MICHAEL E	Open-market sale	6,237	$243.63	37,987
2026-08-28	PREVOZNIK MICHAEL E	Open-market sale	16,010	$242.88	44,224
2026-08-28	PREVOZNIK MICHAEL E	Option exercise	22,677	$112.17	60,234
2026-07-28	DELANEY MARK E	Open-market sale	1,600	$235.18	10,335
2026-07-22	DELANEY MARK E	L	34	$206.81	11,935
2026-07-22	Lassiter Wright III	L	6	$206.81	10,323
2026-07-22	SAMAD SAM	Grant / award	102	$206.81	33,478
2026-07-22	MAIN TIMOTHY L	L	21	$206.81	22,460
2026-07-22	Plewman Patrick	L	46	$206.81	15,293
2026-07-22	Gregg Vicky B	Grant / award	72	$206.81	18,386
2026-07-22	CARTER ROBERT B	L	11	$206.80	3,864
2026-07-22	KUPPUSAMY KARTHIK	L	37	$206.81	13,557
2026-07-01	WENTWORTH TIMOTHY C	Grant / award (derivative)	144	$0.00	342
2026-06-04	KUPPUSAMY KARTHIK	Option exercise (derivative)	3,320	$127.72	0
2026-06-04	KUPPUSAMY KARTHIK	Open-market sale	8,147	$200.00	13,510
2026-06-04	KUPPUSAMY KARTHIK	Option exercise	4,827	$121.81	21,657
2026-06-04	KUPPUSAMY KARTHIK	Option exercise	3,320	$127.72	16,830
2026-06-01	Davis J. E.	Open-market sale	10,000	$194.14	132,423
2026-05-20	PFEIFFER GARY M	Grant / award	1,142	$0.00	31,005
2026-05-20	MORRISON DENISE M	Grant / award	1,142	$0.00	11,929
2026-05-20	Lassiter Wright III	Grant / award	1,142	$0.00	10,317
2026-05-20	RING TIMOTHY M	Grant / award	1,142	$0.00	31,140
2026-05-20	Doi Tracey	Grant / award	1,142	$0.00	7,748
2026-05-20	WENTWORTH TIMOTHY C	Grant / award	1,142	$0.00	1,358
2026-05-20	MAIN TIMOTHY L	Grant / award	1,142	$0.00	27,439
2026-05-20	Diaz Luis	Grant / award	1,142	$0.00	5,196
2026-05-20	Gregg Vicky B	Grant / award	1,142	$0.00	18,314
2026-05-20	CARTER ROBERT B	Grant / award	1,142	$0.00	3,853
2026-04-20	DELANEY MARK E	L	37	$194.70	11,901
2026-04-20	KUPPUSAMY KARTHIK	L	39	$194.70	13,490
2026-04-20	Lassiter Wright III	L	6	$194.70	9,063
2026-04-20	CARTER ROBERT B	L	7	$194.70	2,711
2026-04-20	Gregg Vicky B	Grant / award	68	$194.70	17,172
2026-04-20	Plewman Patrick	L	49	$194.70	15,247
2026-04-20	SAMAD SAM	Grant / award	108	$194.70	33,376
2026-04-01	WENTWORTH TIMOTHY C	Grant / award (derivative)	198	$0.00	198

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.