UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF THE

SECURITIES EXCHANGE ACT OF 1934


Date of report (Date of earliest event reported)			June 23, 2025


PUBLIC SERVICE COMPANY OF OKLAHOMA

(Exact Name of Registrant as Specified in Its Charter)


Oklahoma	0-343	73-0410895
(State or Other Jurisdiction of	(Commission File Number)	(IRS Employer Identification
Incorporation)		No.)


1 Riverside Plaza,	Columbus,	OH	43215
(Address of Principal Executive Offices)			(Zip Code)


(Registrant's Telephone Number, Including Area Code)	(614)	716-1000

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):


☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class	Trading Symbol(s)	Name of each exchange on which registered


Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
Emerging growth company			☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
			□

Item 8.01. Other Events

On June 23, 2025, Public Service Company of Oklahoma (the “Company”) entered into an Underwriting Agreement with Credit Agricole Securities (USA) Inc., MUFG Securities Americas Inc., SMBC Nikko Securities America, Inc. and TD Securities (USA) LLC, as representatives of the underwriters named therein (collectively, the “Underwriters”), relating to the offering and sale by the Company of $800,000,000 of its 5.45% Senior Notes, Series N, due 2036 (the “Notes”).

Item 9.01. Financial Statements and Exhibits


1(a)			Underwriting Agreement, dated June 2 3 , 202 5 between the Company and the Underwriters named in Exhibit 1 thereto, in connection with the sale of the Notes.

4(a)			T hirteenth Supplemental Indenture, dated as of June 1 , 202 5 , between the Company and The Bank of New York Mellon Trust Company, N.A, as Trustee, establishing the terms of the Notes.

4(b)			Form of the Notes (included in Exhibit 4(a) hereto).

5(a)			Opinion of William E. Johnson regarding the legality of the Notes.

104			Cover Page Interactive Data File - The cover page iXBRL tags are embedded within the inline XBRL document.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.


			PUBLIC SERVICE COMPANY OF OKLAHOMA


			By: /s/ William E. Johnson
			Name: William E. Johnson
			Title: Assistant Secretary

June 25, 2025

PUBLIC SERVICE CO OF OKLAHOMA 8-K