WD 40 CO — Director's Dealing 2025

Oct 10, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WD 40 CO (WDFC)
CIK: 0000105132
Period of Report: 2025-10-09

Reporting Person: Olsem Patricia Q (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-10-09	Common Stock	A	1011	—	Acquired	2330	Direct
2025-10-09	Common Stock	A	1120	—	Acquired	3450	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5274	Indirect

Footnotes

F1: Represents a grant of restricted stock units (RSUs) under the WD-40 Company 2016 Stock Incentive Plan, as amended and restated effective December 12, 2023. Except as otherwise provided in the RSU award agreement, the RSUs vest annually over 3 years.

F2: Represents the vesting of market share units (MSUs) upon certification of market performance achieved. The 3-year performance cliff vesting MSUs were granted on October 10, 2022 under the WD-40 Company 2016 Stock Incentive Plan and will be settled with Issuer's Common Stock on the date provided for in the MSU award agreement.

F3: Under the 2007 Olsem Family Trust, Reporting Person shares voting power and investment discretion with her spouse.

F4: As of the filing date, the amount reported includes: (i) 1,011 unvested RSUs (the grant of RSUs reported in this Form 4), (ii) 1,120 shares of Common Stock to be issued upon settlement of MSUs, (iii) 644 shares of restricted Common Stock received upon settlement of performance stock units or PSUs, and (iv) 89 vested deferred performance units or DPUs, which are Common Stock equivalents.

F5: As of the filing date, the amount reported includes 831 unvested RSUs.