Capital Research reports 13.6% stake in Pinnacle West

Pinnacle West Capital Corp. ownership disclosure: Capital Research Global Investors reports beneficial ownership of 16,441,549 shares, representing 13.6% of 120,905,390 shares outstanding.

Rhea-AI Filing Summary

Pinnacle West Capital Corp. ownership disclosure: Capital Research Global Investors reports beneficial ownership of 16,441,549 shares, representing 13.6% of 120,905,390 shares outstanding.

The filing is an amended Schedule 13G/A (Amendment No. 6) listing sole voting and dispositive power over the 16,441,549 shares. Signature block shows execution by a Vice President and Senior Counsel on 05/11/2026.

Insights

Institutional Ownership Analyst

Large passive position reported: 13.6% stake.

This Schedule 13G/A amendment identifies Capital Research Global Investors as the beneficial owner of 16,441,549 shares of Pinnacle West Common Stock, equal to 13.6% of the 120,905,390 shares the filing cites as outstanding.

Filing lists sole voting and sole dispositive power for the full amount. Subsequent disclosures or transactions by the holder could change holdings; timing and cash‑flow treatment are not specified in the excerpt.

Compliance & Filings Specialist

Amendment confirms institutional aggregation and attribution.

The disclosure explains that CRGI is a division of Capital Research and Management Company and aggregates related investment management entities when reporting the 16,441,549 shares. The filing includes the issuer CUSIP 723484101.

As an amended Schedule 13G/A, this is a regulatory ownership disclosure; further material actions would appear in future filings if required.

Key Figures

Filing type: Schedule 13G/A (Amendment No. 6) Shares beneficially owned: 16,441,549 shares Percent of class: 13.6% +2 more

5 metrics

Filing type Schedule 13G/A (Amendment No. 6) ownership disclosure

Shares beneficially owned 16,441,549 shares Capital Research Global Investors reported amount

Percent of class 13.6% of 120,905,390 shares outstanding

Shares outstanding (cited) 120,905,390 shares figure cited in the filing as outstanding

CUSIP 723484101 Pinnacle West Common Stock identifier

Key Terms

Schedule 13G/A, Beneficial owner, Sole Voting Power, Sole Dispositive Power

4 terms

Schedule 13G/A regulatory

"Amendment No. 6) Pinnacle West Capital Corp."

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial owner financial

"is deemed to be the beneficial owner of 16,441,549 shares"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

Sole Voting Power regulatory

"Sole Voting Power 16,441,549.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Sole Dispositive Power regulatory

"Sole Dispositive Power 16,441,549.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Capital Research Global Investors report in Pinnacle West (PNW)?

Capital Research Global Investors reports beneficial ownership of 16,441,549 shares, equal to 13.6% of the 120,905,390 shares the filing lists as outstanding.

What filing type did CRGI use to report its Pinnacle West position?

CRGI filed an amended Schedule 13G/A (Amendment No. 6) to disclose its position in Pinnacle West Common Stock with CUSIP 723484101.

Does the filing state who holds voting or dispositive power for the shares?

Yes; the filing reports sole voting power and sole dispositive power over all 16,441,549 shares attributed to the reporting group.

When was the amendment signed or executed?

The signature block shows the document was signed by a Vice President and Senior Counsel on 05/11/2026 for the reporting entities.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/14/2026 - 10:19 AM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 6)

Pinnacle West Capital Corp.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

723484101

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 723484101

1

Names of Reporting Persons

Capital Research Global Investors

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 16,441,549.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 16,441,549.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

16,441,549.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

13.6 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Pinnacle West Capital Corp.
(b)	Address of issuer's principal executive offices: 400 NORTH FIFTH STREET, PHOENIX, AZ 85004
Item 2.
(a)	Name of person filing: Capital Research Global Investors
(b)	Address or principal business office or, if none, residence: 333 South Hope Street, 55th Fl, Los Angeles, CA 90071
(c)	Citizenship: N/A
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 723484101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 16,441,549 ** **Capital Research Global Investors ("CRGI") is a division of Capital Research and Management Company ("CRMC"), as well as its investment management subsidiaries and affiliates Capital Bank and Trust Company, Capital International, Inc., Capital International Limited, Capital International Sarl, Capital International K.K., Capital Group Private Client Services, Inc., and Capital Group Investment Management Private Limited (together with CRMC, the "investment management entities"). CRGI's divisions of each of the investment management entities collectively provide investment management services under the name "Capital Research Global Investors." CRGI is deemed to be the beneficial owner of 16,441,549 shares or 13.6% of the 120,905,390 shares believed to be outstanding.
(b)	Percent of class: 13.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 16,441,549
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 16,441,549
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Capital Research Global Investors

Signature:	Jae Won Chung
Name/Title:	Vice President and Senior Counsel II, Capital Research and Management Company
Date:	05/11/2026