Quest Diagnostics DGX Institutional Ownership

NYSE DGX

$234.45 +3.99 (+1.73%)

As of: Oct 14, 2026 · 12:29 PM EDT

Institutions by Trading Activity

1,095 Institutions

Increased 548 50.0%

Unchanged 206 18.8%

Reduced 341 31.1%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

94.39%

▲+2.22 pp QoQ

Shares Held by Institutions

104.77Mn

of 111.00Mn outstanding

▲+2.69% QoQ

Shares Outstanding

111.00Mn

6.23Mn held outside 13F filers

Institutional Investors

1,095

filed 13F for Jun 2026

▲+43 vs prior quarter

Net Shares Added (QoQ)

+2.75Mn

accumulated since last quarter

Value of Holdings

$24.16Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Quest Diagnostics Inc (NYSE:DGX) was reported as a holding by 1,095 institutional investors in 13F filings for the quarter ended June 30, 2026.

These investors held 94.39% of Quest Diagnostics' outstanding shares at the end of Q2 2026, up from 92.16% in Q1 2026.
Total holdings of Quest Diagnostics shares rose 2.69% from Q1 2026, and the number of holders rose 12.08% from Q2 2025.
Of these 1,095 holders, 548 added to their positions, 341 reduced their stakes and 206 left their positions unchanged.
In total, institutional investors held 104.77Mn shares of Quest Diagnostics at the end of Q2 2026, up 2.75Mn from the prior quarter and down 140.64K from a year earlier.
As of June 30, 2026, BlackRock, Inc. held the largest stake in Quest Diagnostics with 9.28Mn shares, or 8.36% of shares outstanding.
The biggest increases in DGX positions during Q2 2026 came from Boston Partners (+732.24K shares), FMR LLC (+456.52K shares), Balyasny Asset Management L.P. (+272.47K shares), Mackenzie Financial Corp (+206.78K shares) and UBS Group AG (+186.57K shares).
Holders that trimmed the most shares of Quest Diagnostics in Q2 2026 while keeping a position were T. Rowe Price Associates Inc (-853K shares), Qube Research & Technologies Ltd (-391.32K shares), Goldman Sachs Group Inc (-366K shares), JPMorgan Chase & Co (-326.02K shares) and Victory Capital Management Inc (-295.78K shares).
Per Business Quant data, the 10 largest holders of Quest Diagnostics at the end of Q2 2026 were BlackRock, Inc. (9.28Mn shares), Vanguard Capital Management LLC (7.23Mn shares), Vanguard Portfolio Management LLC (6.13Mn shares), State Street Corp (5.52Mn shares), T. Rowe Price Associates Inc (5.44Mn shares), Boston Partners (4.74Mn shares), JPMorgan Chase & Co (3.52Mn shares), Geode Capital Management, LLC (3.14Mn shares), Morgan Stanley (2.46Mn shares) and EdgePoint Investment Group Inc. (2.25Mn shares).

Form 13F Holdings

1,097 Institutional Holders

Report period 30 Jun, 2026

Total shares held 104.77Mn

Of outstanding 94.39%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	9,275,411	8.36%	▲103,119	+1.12%	$1.97Bn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	7,233,394	6.52%	▲87,722	+1.23%	$1.53Bn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	6,131,045	5.52%	▲49,645	+0.82%	$1.30Bn
4	State Street Corp	0000093751	5,516,643	4.97%	▲135,822	+2.52%	$1.17Bn
5	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	5,444,986	4.91%	▼853,001	-13.54%	$1.15Mn
6	Boston Partners	0001386060	4,744,473	4.27%	▲732,241	+18.25%	$1.00Bn
7	Jpmorgan Chase & Co	0000019617	3,520,438	3.17%	▼326,018	-8.48%	$748.59Mn
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	3,137,873	2.83%	▲51,565	+1.67%	$662.58Mn
9	Morgan Stanley	0000895421	2,460,497	2.22%	▼19,223	-0.78%	$521.50Mn
10	EdgePoint Investment Group Inc.	0001481669	2,247,568	2.02%	▲3,699	+0.16%	$476.37Mn
11	DIMENSIONAL FUND ADVISORS LP	0000354204	1,988,048	1.79%	▲38,513	+1.98%	$421.38Mn
12	Bank Of America Corp /De/	0000070858	1,935,133	1.74%	▲182,231	+10.40%	$410.15Mn
13	Grantham, Mayo, Van Otterloo & Co. LLC	0001352662	1,888,207	1.70%	▲5,183	+0.28%	$400.21Mn
14	Wells Fargo & Company/Mn	0000072971	1,751,220	1.58%	▼11,549	-0.66%	$371.17Mn
15	DAVIS SELECTED ADVISERS	0001036325	1,555,612	1.40%	▼62,201	-3.84%	$329.78Mn
16	VICTORY CAPITAL MANAGEMENT INC	0001040188	1,550,556	1.40%	▼295,780	-16.02%	$328.64Mn
17	NORGES BANK	0001374170	1,406,620	1.27%	▲1,406,620	0.00%	$298.13Mn
18	FMR LLC	0000315066	1,398,735	1.26%	▲456,517	+48.45%	$296.46Mn
19	Invesco Ltd.	0000914208	1,379,115	1.24%	▼259,372	-15.83%	$292.30Mn
20	Northern Trust Corp	0000073124	1,127,454	1.02%	▲13,235	+1.19%	$238.96Mn

Showing 1 to 20 of 1,097 holders