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): August 10, 2026

United Parcel Service, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code (404) 828-6000

Not Applicable

(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):

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

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. ¨

On August 10, 2026, United Parcel Service, Inc. (the “Company”) entered into an agreement (the “Underwriting Agreement”) with the underwriters listed on Schedule II thereto (the “Underwriters”), whereby the Company agreed to sell and the Underwriters agreed to purchase from the Company, subject to and upon the terms and conditions set forth in the Underwriting Agreement, $1,000,000,000 principal amount of 4.850% Senior Notes due 2031 (the “Notes”), of which the Company intends to contribute $200,000,000 principal amount of the Notes to the UPS Retirement Plan Trust, a pension trust that funds only the UPS Retirement Plan maintained by the Company for employees and former employees, and $250,000,000 principal amount of the Notes to the Master Trust (together with the UPS Retirement Plan Trust, the “Trusts”), a pension trust which funds three defined benefit pension plans, including the UPS Pension Plan, maintained by the Company for employees and former employees (the “Transaction”).

The Company intends to use the net proceeds of this offering for general corporate purposes. The Company will not receive proceeds from the portion of the Notes delivered to the Underwriters, for allocation to the Company, and redelivered by the Company to each Trust.

A copy of the Underwriting Agreement is attached hereto as Exhibit 1.1 and is incorporated herein by reference. The foregoing summary does not purport to be complete and is qualified in its entirety by reference to the Underwriting Agreement.

The Company is filing this Current Report on Form 8-K in order to file with the Securities and Exchange Commission certain items related to the Transaction that are to be incorporated by reference into its Registration Statement on Form S-3 (Registration No. 333-285036).

(d) Exhibits.

Signatures

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 hereunto duly authorized.