When did WDC join the S&P 500?

Western Digital joined the S&P 500 index on 2009-07-01.

What sector is WDC in?

WDC is in the Information Technology sector, Technology Hardware, Storage & Peripherals industry.

WDC — Western Digital

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

Technology Hardware, Storage & Peripherals · Information Technology

S&P 500 Timeline

2009-07-01Joined S&P 500

Western Digital Corporation is engaged in the development, manufacture, marketing and sale of data storage devices and solutions. It operates through the Flash and Hard Disk Drive segments. The Flash segment represents flash-based data storage devices. The Hard Disk Drive segment provides hard disk storage solutions.

Key Facts

Status	Active
Sector	Information Technology
Industry	Technology Hardware, Storage & Peripherals
Joined	2009-07-01
Tenure	17 yrs

Industry Peers

AAPL DELL HPE HPQ NTAP SMCI SNDK STX

Sector Peers

AAPL ACN ADBE ADI ADSK AKAM AMAT AMD ANET APH

Institutional Holdings (13F)

1,427 institutions hold WDC, totaling 2.56B shares ($109.9B) · As of 2026Q1

Rank	Institution	Shares	Value
1	VANGUARD CAPITAL MANAGEMENT LLC	44.1M	$11.9B
2	BlackRock, Inc.	62.3M	$9.9B
3	FMR LLC	51.5M	$8.7B
4	MORGAN STANLEY	29.6M	$4.7B
5	VANGUARD PORTFOLIO MANAGEMENT LLC	17.2M	$4.6B
6	STATE STREET CORP	49.6M	$4.4B
7	JPMORGAN CHASE & CO	19.3M	$4.4B
8	Capital World Investors	12.4M	$3.2B
9	GEODE CAPITAL MANAGEMENT, LLC	9.5M	$2.6B
10	BANK OF AMERICA CORP /DE/	8.5M	$2.3B

View all holders →

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