# EDGAR Filing Document

**Accession Number:** 0000105132
**File Stem:** 0000105132-26-000019
**Filing Date:** 2026-2
**Character Count:** 9459
**Document Hash:** 365da0be9d784a8e3483c699c7e1fbeb
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000105132-26-000019.hdr.sgml**: 20260219

**ACCESSION NUMBER**: 0000105132-26-000019

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260218

**FILED AS OF DATE**: 20260219

**DATE AS OF CHANGE**: 20260219

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Plunk Ken Allen
- **CENTRAL INDEX KEY:** 0001826410

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-06936
- **FILM NUMBER:** 26655893

**MAIL ADDRESS:**
- **STREET 1:** C/O: WD-40 COMPANY
- **STREET 2:** 9715 BUSINESSPARK AVENUE
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92131
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WD 40 CO
- **CENTRAL INDEX KEY:** 0000105132
- **STANDARD INDUSTRIAL CLASSIFICATION:** MISCELLANEOUS CHEMICAL PRODUCTS [2890]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 951797918
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0831

**BUSINESS ADDRESS:**
- **STREET 1:** 9715 BUSINESSPARK AVENUE
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92131
- **BUSINESS PHONE:** 6192751400

**MAIL ADDRESS:**
- **STREET 1:** 9715 BUSINESSPARK AVENUE
- **CITY:** SAN DIEGO
- **STATE:** CA
- **ZIP:** 92131

## Ex-24

#### &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

#### Exhibit 24

#### POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS, THAT THE UNDERSIGNED HEREBY CONSTITUTES AND APPOINTS EACH OF (I) THE VICE PRESIDENT, GENERAL COUNSEL AND CHIEF COMPLIANCE OFFICER WHO IS CURRENTLY **PHENIX Q. KIAMILEV**, AND (II) THE DEPUTY GENERAL COUNSEL, WHO IS CURRENTLY **ANH-THU ("ANN") T. NGUYEN**, AND THEIR RESPECTIVE SUCCESSORS, SIGNING SINGLY, THE UNDERSIGNED'S TRUE AND LAWFUL ATTORNEYS-IN-FACT TO:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) prepare, execute for and on behalf of the undersigned, and submit to the U.S. Securities and Exchange Commission (the "SEC") a Form ID application, including amendments, corrections, supplements or changes (collectively, "Amendments") thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings on the SEC's Electronic Date Gathering, Analysis, and Retrieval system (EDGAR) as required by Section 16(a) of the Securities Exchange Act of 1934, as amended, or any rule or regulation of the SEC thereunder (the "Exchange Act");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) execute for and on behalf of the undersigned, in the undersigned's capacity once the undersigned becomes an officer and/or director of WD-40 Company (the "Company") and/or beneficial owner of more than 5% of the Company's capital stock, Forms 3, 4, and 5 and any Amendments thereto, in accordance with the Exchange Act, and Forms 144 and any Amendments thereto, in accordance with Rule 144 promulgated under the Securities Act of 1933, as amended, or any rule or regulation of the SEC thereunder (the "Securities Act");

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any of the foregoing filings and timely file such forms with the SEC and any stock exchange or similar authority; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted.

The undersigned agrees that each such attorney-in-fact herein may rely entirely on information furnished orally or in writing by the undersigned to such attorney-in-fact for purposes of executing, acknowledging, delivering or filing the Form ID, Forms 3, 4 or 5, Forms 144, including any Amendments thereto (collectively, "Section 16 Filings"). The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Exchange Act or Rule 144 promulgated under the Securities Act.

This Power of Attorney supersedes any power of attorney previously executed by the undersigned regarding the purposes outlined in the first paragraph hereof ("Prior Power of Attorney"), and the authority of the attorney-in-fact named in any Prior Power of Attorney is hereby revoked.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Section 16 Filings with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

This Power of Attorney may be executed and delivered by PDF or other electronic transmission and shall be deemed to have the same legal effect as delivery of an original signed copy of this Power of Attorney.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 23<sup>rd</sup> day of January, 2026.

Signature: <u>/s/ Ken Plunk</u>

Print Name: Ken Plunk

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Plunk Ken Allen<br><sub>(Last) (First) (Middle)</sub><br>C/O: WD-40 COMPANY<br>9715 BUSINESSPARK AVENUE<br><sub>(Street)</sub><br>SAN DIEGO, CA 92131<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>WD 40 CO [ WDFC ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-02-18 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 0 | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

**Remarks:**
See attached Power of Attorney dated January 23, 2026.

**Signature:** Ann T. Nguyen, attorney-in-fact for Ken Allen Plunk  
**Date:** 2026-02-19

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**