Company: PSA-PH
Filing Date: 2025-10-03
Form Type: 8-A12B
Source: 0001193125-25-230453
Chunk: 1

Company: Public Storage
Filing Date: 2025-10-03
Form: 8-A12B
Chunk 1
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 “Prospectus Supplement”) dated September 26, 2025 to the prospectus (the “Prospectus”) dated December 2, 2024 (relating to the registrant’s Registration Statement on Form S-3 (File Nos. 333-283556 and 333-283556-01)) that was filed by the Company and PSOC with the
Securities and Exchange Commission on December 2, 2024 pursuant to Rule 424(b) under the Securities Act of 1933, and under the section entitled “Description of Debt Securities” beginning on page 22 of the Prospectus, which
Prospectus and Prospectus Supplement shall be deemed to be incorporated herein by this reference.

Item 2. Exhibits.

The following exhibits are being filed with the copies of this Form 8-A Registration Statement filed with the New York
Stock Exchange and the Securities and Exchange Commission:

Exhibit 4.1 – Amended and Restated Indenture, dated as of August 14, 2023, among Public Storage, Public Storage Operating Company and Computershare Trust Company, N.A. (as successor to Wells Fargo Bank, National Association, as trustee). Filed as Exhibit A to Exhibit 4.1 to the Company’s Current Report on Form 8-Kdated August14, 2023 and incorporated herein by reference.

Exhibit 4.2 – Twenty-First Supplemental Indenture, dated as of October 3, 2025, among Public Storage Operating Company, Public Storage and Computershare Trust Company, N.A. (as successor to Wells Fargo Bank, National Association, as trustee), filed as Exhibit 4.2 to the Company’s Current Report on Form 8-Kfiled on October 3, 2025 and incorporated herein by reference.

Exhibit 4.3 – Form of 3.500% Senior Note due 2034, filed as Exhibit 4.3 to the Company’s Current Report on Form 8-K filed on October 3, 2025 and incorporated herein by reference.

SIGNATURE Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934, each registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereto duly authorized.

| Date: October 3, 2025 |     | PUBLIC STORAGE                   
 By:                              |     | /s/ Nathaniel A. Vitan                       
 Nathaniel A. Vitan Senior