When did DGX join the S&P 500?

Quest Diagnostics joined the S&P 500 index on 2002-12-12.

What sector is DGX in?

DGX is in the Health Care sector, Health Care Services industry.

DGX — Quest Diagnostics

Name: DGX Institutional Holdings (13F) — 2026Q1
Creator: SEC EDGAR
License: https://www.sec.gov/data

Health Care Services · Health Care

Key Facts

Status	Active
Sector	Health Care
Industry	Health Care Services
Joined	2002-12-12
Tenure	23 yrs

Quest Diagnostics provides diagnostic testing, information, and services. It operates through the Diagnostic Information Services (DIS) segment and all other segments. The DIS segment provides diagnostic information services to patients, clinicians, hospitals, health plans, and employers. All other segments include risk assessment services, healthcare information technology, diagnostic products, and clinical trials testing businesses.

Industry Peers

CI CVS DVA LH

Sector Peers

A ABBV ABT ALGN AMGN BAX BDX BIIB BMY BSX

S&P 500 Timeline

2002-12-12Joined S&P 500

Institutional Holdings (13F)

1,066 institutions hold DGX, totaling 128.0M shares ($22.5B) · As of 2026Q1

Rank	Institution	Shares	Value
1	VANGUARD CAPITAL MANAGEMENT LLC	14.3M	$2.8B
2	BlackRock, Inc.	9.2M	$1.8B
3	MORGAN STANLEY	7.5M	$1.4B
4	VANGUARD PORTFOLIO MANAGEMENT LLC	6.1M	$1.2B
5	STATE STREET CORP	5.4M	$1.1B
6	Boston Partners	4.0M	$787M
7	JPMORGAN CHASE & CO	3.8M	$758M
8	BARCLAYS PLC	4.2M	$659M
9	GEODE CAPITAL MANAGEMENT, LLC	3.1M	$603M
10	GOLDMAN SACHS GROUP INC	3.1M	$561M

View all holders →

Data source: Wikipedia · CC BY-SA 4.0 · SEC EDGAR 13F · Updated 2026-07-10