[Form 4] WD 40 CO Insider Trading Activity

Rhea-AI Filing Summary

WD-40 Company (WDFC) disclosed an insider purchase by President and CEO Steven A. Brass. On 10/28/2025, he bought 362 shares of common stock at $200.46 (transaction code P), an open-market purchase.

Following the transaction, Brass beneficially owned 33,761 shares directly. The reported amount includes 13,189 unvested RSUs, 1,218 restricted shares received upon settlement of performance stock units, 108 vested DPUs (stock equivalents), and 2,621 shares held in his WD-40 Company Profit Sharing / 401(k) Plan account.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Brass Steven A

(Last) (First) (Middle)

C/O: WD-40 COMPANY

9715 BUSINESSPARK AVE.

(Street)

SAN DIEGO CA 92131

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
WD 40 CO [ WDFC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
10/28/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/28/2025		P		362	A	$200.46	33,761(1)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Amount reported includes: (i) 13,189 unvested RSUs, (ii) 1,218 shares of restricted Common Stock received upon settlement of performance stock units, (iii) 108 vested deferred performance units or DPUs, which are Common Stock equivalents, and (iv) 2,621 shares held in Reporting Person's WD-40 Company Profit Sharing / 401(k) Plan account

	Ann T. Nguyen, attorney-in-fact for Steven A. Brass	10/29/2025
	** Signature of Reporting Person	Date
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.

FAQ

What did WD-40 (WDFC) report in this Form 4?

Steven A. Brass, the President and CEO, reported buying 362 shares of WD-40 common stock on 10/28/2025.

At what price were the WDFC shares purchased?

The shares were purchased at $200.46 per share.

How many WDFC shares does the CEO beneficially own after the transaction?

Brass beneficially owns 33,761 shares following the reported transaction.

What is the transaction code and what does it indicate?

The transaction code is P, which indicates an open-market purchase.

What components are included in the reported beneficial ownership for WDFC?

The amount includes 13,189 unvested RSUs, 1,218 restricted shares from PSU settlement, 108 vested DPUs, and 2,621 shares in a 401(k) plan account.