BLAIR WILLIAM & CO/IL

Position in DGX — Quest Diagnostics Inc

CIK 902367 CHICAGO, IL

Position in DGX

as of Mar 31, 2026 · filed May 8, 2026 Compact

Position Value

$18,024,672

+$86,009 QoQ

Shares Held

91,972

-11.0% QoQ

Ownership

0.083%

of shares outstanding

% of Portfolio

0.06%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 96.4304353498891.ToString("F0")% Shared 0.ToString("F0")% None 3.5695646501109035.ToString("F0")%

Healthcare · as of Mar 31, 2026

BLAIR WILLIAM & CO/IL holds $949,814,483 across 21 Diagnostics & Research names. DGX ranks #5 (1.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	IDXX	Idexx Laboratories Inc /De	946,336	$531,736,735
2	DHR	Danaher Corp /De/	1,296,804	$245,874,038
3	TMO	Thermo Fisher Scientific Inc.	172,953	$85,011,588
4	MTD	Mettler Toledo International Inc/	25,604	$32,291,764
5	DGX	Quest Diagnostics Inc This page	91,972	$18,024,672
6	GH	Guardant Health, Inc.	103,644	$9,573,596
7	VCYT	Veracyte, Inc.	194,887	$6,277,310
8	MEDP	Medpace Holdings, Inc.	7,518	$3,610,068

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$18,024,672	91,972	-11.0%	Shares	Sole	2026-05-08
2025-12-31	$17,938,663	103,375	+5.6%	Shares	Sole	2026-02-17
2025-09-30	$18,661,212	97,918	+7.4%	Shares	Sole	2025-11-12
2025-06-30	$16,383,872	91,209	+73.3%	Shares	Sole	2025-07-24
2025-03-31	$8,903,473	52,621	+31.0%	Shares	Sole	2025-05-09
2024-12-31	$6,058,085	40,157	+14.9%	Shares	Sole	2025-02-12
2024-09-30	$5,424,279	34,939	+231.0%	Shares	Sole	2024-11-12
2024-06-30	$1,444,631	10,554	+0.1%	Shares	Sole	2024-08-12
2024-03-31	$1,404,044	10,548	-0.9%	Shares	Sole	2024-05-09
2023-12-31	$1,467,870	10,646	-6.5%	Shares	Sole	2024-02-12
2023-09-30	$1,387,376	11,385	-21.4%	Shares	Sole	2023-11-09
2023-06-30	$2,036,011	14,485	+1.2%	Shares	Sole	2023-08-11
2023-03-31	$2,024,861	14,312	+63.9%	Shares	Sole	2023-05-12
2022-12-31	$1,366,346	8,734	+5.8%	Shares	Sole	2023-02-10
2022-09-30	$1,013,051	8,257	+1.2%	Shares	Sole	2022-11-09
2022-06-30	$1,084,983	8,159	-0.2%	Shares	Sole	2022-08-10
2022-03-31	$1,118,419	8,172	-50.9%	Shares	Sole	2022-05-13
2021-12-31	$2,882,346	16,660	+22.0%	Shares	Sole	2022-02-14
2021-09-30	$1,984,643	13,658	-6.4%	Shares	Sole	2021-11-12
2021-06-30	$1,925,838	14,593	+18.6%	Shares	Sole	2021-08-12
2021-03-31	$1,579,095	12,304	-60.7%	Shares	Sole	2021-05-13
2020-12-31	$3,734,906	31,341	+5.1%	Shares	Sole	2021-02-09
2020-09-30	$3,412,832	29,809	+137.9%	Shares	Sole	2020-11-06
2020-06-30	$1,427,690	12,528	+175.0%	Shares	Sole	2020-08-12
2020-03-31	$365,766	4,555	—	Shares	Sole	2020-05-11
No filing history on record for this holder in this stock.