When did DUK join the S&P 500?

Duke Energy joined the S&P 500 index on 1976-06-30.

What sector is DUK in?

DUK is in the Utilities sector, Electric Utilities industry.

DUK — Duke Energy

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

Electric Utilities · Utilities

S&P 500 Timeline

1976-06-30Joined S&P 500

Duke Energy distributes natural gas and provides energy-related services. The company operates through three segments: Electric Utilities and Infrastructure, Gas Utilities and Infrastructure, and Other. The Electric Utilities and Infrastructure segment operates regulated electric utilities in the Carolinas, Florida, and the Midwest. The Gas Utilities and Infrastructure segment focuses on natural gas local distribution companies in Piedmont, Ohio, and Kentucky, along with natural gas storage and midstream pipeline investments. The Other segment includes interest expenses on holding company debt, unallocated corporate costs, and Bison, a wholly owned captive insurance company.

Key Facts

Status	Active
Sector	Utilities
Industry	Electric Utilities
Joined	1976-06-30
Tenure	50 yrs

Industry Peers

AEP CEG EIX ES ETR EVRG EXC FE LNT PEG

Sector Peers

AEE AEP AES ATO AWK CEG CMS CNP D DTE

Institutional Holdings (13F)

2,489 institutions hold DUK, totaling 2.03B shares ($84.3B) · As of 2026Q1

Rank	Institution	Shares	Value
1	VANGUARD CAPITAL MANAGEMENT LLC	101.1M	$13.2B
2	BlackRock, Inc.	69.3M	$9.1B
3	STATE STREET CORP	44.5M	$5.8B
4	MORGAN STANLEY	62.5M	$4.7B
5	BARCLAYS PLC	53.9M	$2.8B
6	GEODE CAPITAL MANAGEMENT, LLC	20.0M	$2.6B
7	VANGUARD PORTFOLIO MANAGEMENT LLC	20.1M	$2.6B
8	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	14.4M	$1.9B
9	FMR LLC	10.8M	$1.4B
10	FRANKLIN RESOURCES INC	10.4M	$1.4B

View all holders →

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