When did PNW join the S&P 500?

Pinnacle West Capital joined the S&P 500 index on 1999-10-04.

What sector is PNW in?

PNW is in the Utilities sector, Multi-Utilities industry.

PNW — Pinnacle West Capital

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

Multi-Utilities · Utilities

Key Facts

Status	Active
Sector	Utilities
Industry	Multi-Utilities
Joined	1999-10-04
Tenure	26 yrs

Pinnacle West Capital Corporation is a holding company engaged in providing energy and energy-related products. Through its subsidiary Arizona Public Service Co., the company provides regulated retail and wholesale electricity operations and related activities, including power generation, transmission, and distribution.

Industry Peers

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Sector Peers

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S&P 500 Timeline

1999-10-04Joined S&P 500

Institutional Holdings (13F)

720 institutions hold PNW, totaling 605.6M shares ($14.8B) · As of 2026Q1

Rank	Institution	Shares	Value
1	Capital Research Global Investors	16.4M	$1.7B
2	VANGUARD CAPITAL MANAGEMENT LLC	15.6M	$1.6B
3	BlackRock, Inc.	49.0M	$1.2B
4	STATE STREET CORP	17.2M	$708M
5	BARROW HANLEY MEWHINNEY & STRAUSS LLC	7.0M	$705M
6	VANGUARD PORTFOLIO MANAGEMENT LLC	6.0M	$603M
7	MORGAN STANLEY	10.6M	$554M
8	ATLAS Infrastructure Partners (UK) Ltd.	5.1M	$511M
9	Invesco Ltd.	4.3M	$428M
10	Soroban Capital Partners LP	3.9M	$388M

View all holders →

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