Company · Ownership research

QUEST DIAGNOSTICS INC DGX

CIK 0001022079 · CUSIP 74834L100

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 74834L100 (DGX), not CUSIP 74834L900 (DGX), CUSIP 74834L950 (DGX), and does not merge CUSIPs.

This page lists the top 20 of 605 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$734.87M 3,164,829 shares	0.04%	+26.96K(+0.90%)Added	SEC filing ↗ Nov 6, 2026	▾
02	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$466.81M 2,002,978 shares	0.08%	+14.93K(+0.80%)Added	SEC filing ↗ Nov 4, 2026	▾
03	M&G PLC CIK 1802539 · View history	$179.43M 770,102 shares	0.90%	-25.55K(-3.20%)Reduced	SEC filing ↗ Nov 4, 2026	▾
04	Bank of New York Mellon Corp CIK 1390777 · View history	$144.23M 618,834 shares	0.02%	-10.51K(-1.70%)Reduced	SEC filing ↗ Nov 5, 2026	▾
05	DEUTSCHE BANK AG\ CIK 948046 · View history	$140.79M 604,046 shares	0.04%	+18.15K(+3.10%)Added	SEC filing ↗ Nov 6, 2026	▾
06	DekaBank Deutsche Girozentrale CIK 1456228 · View history	$140.47M 604,435 shares	0.16%	-144.25K(-19.30%)Reduced	SEC filing ↗ Oct 27, 2026	▾
07	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history	$109.25M 468,720 shares	0.06%	-48.51K(-9.40%)Reduced	SEC filing ↗ Nov 2, 2026	▾
08	Amundi CIK 1330387 · View history	$102.44M 439,544 shares	0.02%	-59.21K(-11.90%)Reduced	SEC filing ↗ Nov 6, 2026	▾
09	MACKENZIE FINANCIAL CORP CIK 919859 · View history	$85.23M 365,671 shares	0.09%	+32.38K(+9.70%)Added	SEC filing ↗ Nov 2, 2026	▾
10	BARCLAYS PLC CIK 312069 · View history	$83.74M 359,274 shares	0.03%	-89.45K(-19.90%)Reduced	SEC filing ↗ Nov 6, 2026	▾
11	Artemis Investment Management LLP CIK 1535385 · View history	$77.98M 334,585 shares	0.68%	-133.34K(-28.50%)Reduced	SEC filing ↗ Oct 8, 2026	▾
12	Mitsubishi UFJ Asset Management Co., Ltd. CIK 1466546 · View history	$66.84M 286,760 shares	0.03%	+18.41K(+6.90%)Added	SEC filing ↗ Nov 5, 2026	▾
13	Sumitomo Mitsui Trust Group, Inc. CIK 1475365 · View history	$58.67M 251,735 shares	0.03%	-6.86K(-2.70%)Reduced	SEC filing ↗ Oct 29, 2026	▾
14	EASTERN BANK CIK 1126395 · View history	$48.41M 207,720 shares	0.74%	+17.75K(+9.30%)Added	SEC filing ↗ Oct 5, 2026	▾
15	PFA Pension, Forsikringsaktieselskab CIK 1730073 · View history	$47.78M 204,990 shares	0.12%	-623(-0.30%)Reduced	SEC filing ↗ Nov 6, 2026	▾
16	Eurizon Capital SGR S.p.A. CIK 2107286 · View history	$45.52M 195,302 shares	0.12%	-27.26K(-12.20%)Reduced	SEC filing ↗ Nov 6, 2026	▾
17	CITIGROUP INC CIK 831001 · View history	$43.94M 188,547 shares	0.02%	-127.04K(-40.30%)Reduced	SEC filing ↗ Nov 4, 2026	▾
18	SEB Asset Management AB CIK 2127509 · View history	$41.63M 178,606 shares	0.15%	-4.30K(-2.40%)Reduced	SEC filing ↗ Nov 4, 2026	▾
19	CONNING INC. CIK 801051 · View history	$37.97M 162,916 shares	1.17%	-23.82K(-12.80%)Reduced	SEC filing ↗ Oct 27, 2026	▾
20	COOKSON PEIRCE & CO INC CIK 1141455 · View history	$36.19M 155,294 shares	1.31%	-295(-0.20%)Reduced	SEC filing ↗ Oct 30, 2026	▾

Showing 20 / 605 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

605

Cancelled or null records excluded

Disclosed shares

17,633,188

Not deduplicated across managers

Disclosed value

$4.10B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

QUEST DIAGNOSTICS INC · Q3 2026

Explore all 605 reporting institutions.

This page includes 20 of 605 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.