Does Marshall Wace own DGX stock?

Yes. As of its Q2 2026 13F, Marshall Wace holds 269,760 shares of DGX (Quest Diagnostics), worth $57.2M.

How many shares of DGX does Marshall Wace own?

As of its Q2 2026 13F, Marshall Wace holds 269,760 shares of DGX (Quest Diagnostics).

As of its Q2 2026 13F, Marshall Wace's DGX position is worth $57.2M.

In Q2 2026, Marshall Wace increased its DGX position by 69,482 shares (+34.7%).

Marshall Wace already held DGX in its Q4 2018 13F, the earliest on record, and has listed it in 29 quarterly 13F filings.

Position history for MWMARSHALL WACE, LLP's holdings in QUEST DIAGNOSTICS INC

Current Value

$57.2M

Current Shares

269,760

Total Value Change

+$16.9M

Total Shares Change

-213,899

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	269,760	+34.7%	$57.2M	0.0%	$210.31	38
2026-Q1	Increased	200,278	+114.8%	$39.3M	0.0%	$193.62	47
2025-Q4	Decreased	93,217	-83.3%	$16.2M	0.0%	$170.66	0
2025-Q3	Increased	557,155	+171.7%	$106.2M	0.1%	$186.60	58
2025-Q2	Decreased	205,083	-57.6%	$36.8M	0.0%	$175.08	0
2025-Q1	Decreased	483,287	-39.3%	$81.8M	0.1%	$164.11	0
2024-Q4	Decreased	796,081	-20.4%	$120.1M	0.1%	$145.61	0
2024-Q3	Increased	1M	+429.4%	$155.4M	0.2%	$149.11	59
2024-Q2	Decreased	189,025	-67.8%	$25.9M	0.0%	$130.77	0
2024-Q1	Increased	586,199	+248.2%	$78M	0.1%	$126.44	57
2023-Q4	Increased	168,337	+8363.4%	$23.2M	0.0%	$130.28	46
2023-Q3	New	1,989	-	$242,378	0.0%	$114.48	32
2023-Q2	Exited	0	-100.0%	$0	0.0%	$131.37	0
2023-Q1	Decreased	19,827	-82.0%	$2.8M	0.0%	$131.58	0
2022-Q4	Increased	110,222	+361.5%	$17.2M	0.0%	$144.84	46
2022-Q3	Increased	23,885	+42.2%	$2.9M	0.0%	$112.98	35
2022-Q2	Decreased	16,800	-64.8%	$2.2M	0.0%	$121.86	0
2022-Q1	Increased	47,791	+24.4%	$6.5M	0.0%	$124.81	33
2021-Q4	Decreased	38,402	-60.2%	$6.6M	0.0%	$157.08	0
2021-Q3	Increased	96,394	+0.9%	$14M	0.1%	$131.36	28
2021-Q2	Increased	95,572	+183.2%	$12.6M	0.1%	$118.75	45
2021-Q1	Decreased	33,744	-45.0%	$4.3M	0.0%	$114.93	0
2020-Q4	New	61,302	-	$7.3M	0.0%	$106.24	38
2020-Q3	Exited	0	-100.0%	$0	0.0%	$101.57	0
2020-Q2	Decreased	160,517	-75.6%	$18.3M	0.1%	$100.62	0
2020-Q1	Decreased	657,205	-7.0%	$52.8M	0.5%	$70.36	0
2019-Q4	Decreased	706,340	-8.0%	$75.4M	0.5%	$93.10	0
2019-Q3	Increased	767,649	+182.7%	$82.2M	0.6%	$92.84	68
2019-Q2	Increased	271,530	+10.6%	$27.6M	0.2%	$87.86	38
2019-Q1	Decreased	245,614	-49.2%	$22.1M	0.2%	$77.15	0
2018-Q4	First report	483,659	-	$40.3M	0.4%	$71.00	0

Other major holders of DGX: VANGUARD GROUP INC