WD-40 Company
Ownership
Ownership Structure
Who owns WD-40 Company (WDFC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.5% of the shares are freely tradable; institutional investors hold 92.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.50 | 2,075,743 | +2.8 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 8.03 | 1,075,929 | +3.6 | 06/30/2026 |
| Kayne Anderson Rudnick Investment Management LLC | 4.70 | 629,021 | -0.8 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.51 | 604,460 | -0.2 | 06/30/2026 |
| State Street Corp | 4.10 | 549,199 | +4.3 | 06/30/2026 |
| Geode Capital Management, LLC | 3.30 | 441,406 | +8.3 | 06/30/2026 |
| AllianceBernstein L.P. | 2.82 | 377,541 | -19.6 | 06/30/2026 |
| First Trust Advisors L.P. | 2.60 | 348,519 | -15.3 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.01 | 804,386 | +0.1 | 10/28/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.20 | 429,090 | +0.4 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Brass Steven A | CEO and President | 40,517 | 8,978,567 $ | Oct 26, 2026 | direct |
| Hyzer Sara Kathleen | VP, Finance & CFO | 7,217 | 1,599,287 $ | Oct 26, 2026 | direct |
| Lindeman Jeffrey G | VP, Chief People, Cult. & Cap. | 5,649 | 1,251,818 $ | Oct 26, 2026 | direct |
| Cloez Christophe Paul | Managing Director, EIMEA | 5,617 | 1,244,727 $ | Oct 26, 2026 | direct |
| Olsem Patricia Q | Division President, Americas | 5,296 | 1,173,594 $ | Oct 26, 2026 | direct |
| Kiamilev Phenix Q. | VP, GC & Chief Compliance Ofcr | 5,117 | 1,133,927 $ | Oct 26, 2026 | indirect |
| Giordano Nicholas Daniel | VP, Corporate Controller & CAO | 563 | 124,761 $ | Oct 26, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 26, 2026 | Olsem Patricia Q | Division President, Americas | Other | 332 | – | – |
| Oct 26, 2026 | Brass Steven A | CEO and President | Other | 3,101 | – | – |
| Oct 26, 2026 | Kiamilev Phenix Q. | VP, GC & Chief Compliance Ofcr | Other | 293 | – | – |
| Oct 26, 2026 | Lindeman Jeffrey G | VP, Chief People, Cult. & Cap. | Other | 269 | – | – |
| Oct 26, 2026 | Cloez Christophe Paul | Managing Director, EIMEA | Other | 183 | – | – |
| Oct 26, 2026 | Hyzer Sara Kathleen | VP, Finance & CFO | Other | 693 | – | – |
| Oct 26, 2026 | Giordano Nicholas Daniel | VP, Corporate Controller & CAO | Other | 34 | – | – |
| Oct 8, 2026 | Giordano Nicholas Daniel | VP, Corporate Controller & CAO | Other | 257 | – | – |
| Oct 8, 2026 | Brass Steven A | CEO and President | Other | 9,808 | – | – |
| Oct 8, 2026 | Cloez Christophe Paul | Managing Director, EIMEA | Other | 1,103 | – | – |
| Oct 8, 2026 | Olsem Patricia Q | Division President, Americas | Other | 1,054 | – | – |
| Oct 8, 2026 | Hyzer Sara Kathleen | VP, Finance & CFO | Other | 1,961 | – | – |
| Oct 8, 2026 | Lindeman Jeffrey G | VP, Chief People, Cult. & Cap. | Other | 1,005 | – | – |
| Oct 8, 2026 | Kiamilev Phenix Q. | VP, GC & Chief Compliance Ofcr | Other | 1,103 | – | – |
| Aug 13, 2026 | Olsem Patricia Q | Division President, Americas | Sell | 200 | 234.72 | 46,944 |
| Aug 10, 2026 | Olsem Patricia Q | Division President, Americas | Sell | 300 | 233.73 | 70,119 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 6, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.