WD-40: Olsem has 332 shares withheld for taxes

WDFC’s Division President, Americas reported 2,914 shares held through the 2007 Olsem Family Trust, with voting and investment discretion shared with her spouse.

Rhea-AI Filing Summary

Patricia Q. Olsem, WDFC’s Division President, Americas, had 332 shares withheld on October 26, 2026, to satisfy tax withholding obligations upon vesting of 921 RSUs. She reported 5,296 directly held shares following the transaction and 2,914 shares held indirectly through the 2007 Olsem Family Trust, where she shares voting power and investment discretion with her spouse. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Tax Withholding: 332 shares

Tax Withholding 2 txns

Insider Olsem Patricia Q

Role Division President, Americas

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1, F2	332	--	--
holding	Common Stock F3	--	--	--

Holdings After Transaction: Common Stock — 5,296 shares (Direct); Common Stock — 2,914 shares (Indirect, By Trust)

Footnotes (3)

1. F1. Shares withheld pursuant to mandatory provisions of Restricted Stock Unit (RSU) Award Agreement(s) in satisfaction of tax withholding obligations upon vesting of 921 RSUs.
2. F2. Amount reported includes: (i) 1,975 unvested RSUs, (ii) 644 shares of restricted Common Stock received upon settlement of performance stock units or PSUs, and (iii) 89 vested deferred performance units or DPUs, which are Common Stock equivalents.
3. F3. Under the 2007 Olsem Family Trust, Reporting Person shares voting power and investment discretion with her spouse.

Key Figures

Shares withheld for tax withholding: 332 shares RSUs vesting: 921 RSUs Direct shares following transaction: 5,296 shares +1 more

4 metrics

Shares withheld for tax withholding 332 shares October 26, 2026

RSUs vesting 921 RSUs Vesting associated with the share withholding on October 26, 2026

Direct shares following transaction 5,296 shares Following the transaction on October 26, 2026

Shares held through the 2007 Olsem Family Trust 2,914 shares Reported on October 26, 2026

Key Terms

Restricted Stock Unit (RSU) Award Agreement(s), performance stock units or PSUs, deferred performance units or DPUs

3 terms

Restricted Stock Unit (RSU) Award Agreement(s) financial

"mandatory provisions of Restricted Stock Unit (RSU) Award Agreement(s)"

performance stock units or PSUs financial

"shares of restricted Common Stock received upon settlement of performance stock units or PSUs"

deferred performance units or DPUs financial

"vested deferred performance units or DPUs, which are Common Stock equivalents"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did WDFC’s Division President, Americas have withheld?

Patricia Q. Olsem had 332 shares withheld on October 26, 2026, for tax withholding upon vesting of 921 RSUs. The withholding was required under the mandatory provisions of her Restricted Stock Unit Award Agreements, and no Rule 10b5-1 plan is reported.

How many WDFC shares did Patricia Q. Olsem report after the withholding?

Following the withholding, Olsem reported 5,296 directly held shares. The report also lists 2,914 shares held through the 2007 Olsem Family Trust; she shares voting power and investment discretion with her spouse.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/27/2026 - 09:03 PM EDT Accepted by SEC EDGAR 10/27/2026 - 09:02 PM EDT Learn about SEC filing dates

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^*

Olsem Patricia Q

(Last) (First) (Middle)

C/O: WD-40 COMPANY

9715 BUSINESSPARK AVENUE

(Street)

SAN DIEGO CALIFORNIA 92131

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Division President, Americas

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/26/2026

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

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

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

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	10/26/2026		F		332	D	(1)	5,296(2)	D
Common Stock								2,914(3)	I	By Trust

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. Shares withheld pursuant to mandatory provisions of Restricted Stock Unit (RSU) Award Agreement(s) in satisfaction of tax withholding obligations upon vesting of 921 RSUs.

2. Amount reported includes: (i) 1,975 unvested RSUs, (ii) 644 shares of restricted Common Stock received upon settlement of performance stock units or PSUs, and (iii) 89 vested deferred performance units or DPUs, which are Common Stock equivalents.

3. Under the 2007 Olsem Family Trust, Reporting Person shares voting power and investment discretion with her spouse.

	Ann T. Nguyen, attorney-in-fact for Patricia Q. Olsem	10/27/2026
	** 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.
* Form 4: SEC 1474 (03-26)