W W Grainger: 2026 Proxy Card

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VIEW MATERIALS & VOTE

W.W. GRAINGER, INC. 100 GRAINGER PARKWAY LAKE FOREST, IL 60045

VOTE BY INTERNET

Before The Meeting - Go to https://www.proxyvote.com or scan the QR Barcode above

Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. ET on (1) April 26, 2026 for shares held in a Plan and

(2) April 28, 2026 if you are a registered shareholder. Have your proxy card in hand when you access the website and follow the instructions to obtain your records and to create an electronic voting instruction form.

During The Meeting - Go to https://www.virtualshareholdermeeting.com/GWW2026

You may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions.

VOTE BY PHONE - 1-800-690-6903

Use any touch-tone telephone to transmit your voting instructions up until 11:59 p.m. ET on (1) April 26, 2026 for shares held in a Plan and (2) April 28, 2026 if you are a registered shareholder. Have your proxy card in hand when you call and then follow the instructions.

VOTE BY MAIL

Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717.

TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS:

V84273-P40770

KEEP THIS PORTION FOR YOUR RECORDS

W.W. GRAINGER, INC.

The Board of Directors recommends you vote FOR the following:

1. To elect 12 Director nominees named in the proxy statement for the ensuing year

The Board of Directors recommends you vote FOR proposals 2 and 3.

For Against Abstain

2.

3.

To ratify the appointment of Ernst & Young LLP as the independent auditor for the year ending December 31, 2026.

To approve on a non-binding, advisory basis the compensation of Grainger's Named Executive Officers.

O

O

O

O

O

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NOTE: In their discretion, the proxyholders may vote upon such other matters as may properly come before the meeting or any adjournment or postponement thereof.

Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer.

Signature [PLEASE SIGN WITHIN BOX]

Date

Signature (Joint Owners)

Date

DETACH AND RETURN THIS PORTION ONLY

The Notice & Proxy Statement, and the Annual Report are available at https://www.proxyvote.com.

V84274-P40770

The undersigned hereby appoints D.G. Macpherson, Nancy L. Berardinelli-Krantz, and Deidra C. Merriwether, and each of them, proxies of the undersigned with full power of substitution to represent the undersigned and to vote all of the shares of the Common Stock of W.W. Grainger, Inc., which the undersigned is entitled to vote at the Annual Meeting of Shareholders of

W.W. Grainger, Inc., to be held on April 29, 2026, virtually at https://www.virtualshareholdermeeting.com/GWW2026, and at any and all adjournments thereof, with all the powers the undersigned would possess if personally present and voting.

A majority of proxies or substitutes who shall be present at the meeting may exercise all powers hereunder. All proxies will be voted as specified. If no specification is made, the proxy will be voted FOR all nominees for director in item 1 and FOR items 2 and 3.