As of the latest Form 4 filed Oct 30, 2025.
What WD-40 Company insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 28 most recent filings for WDFC.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2025-10-30 | 2025-10-30 | Etchart Eric Director | PPurchase | +500.00 | $194.02 | $97.0K | No | Form 4 ↗ |
| 2025-10-30 | 2025-10-30 | PENDARVIS DAVID Director | PPurchase | +523.00 | $196.37 | $103K | No | Form 4 ↗ |
| 2025-10-29 | 2025-10-28 | KIAMILEV PHENIX Q. VP, GC & Chief Compliance Ofcr | PPurchase | +55.00 | $200.46 | $11.0K | No | Form 4 ↗ |
| 2025-10-29 | 2025-10-28 | Brass Steven A President and CEO | PPurchase | +362.00 | $200.46 | $72.6K | No | Form 4 ↗ |
| 2025-10-29 | 2025-10-28 | HYZER SARA KATHLEEN VP, Finance & CFO | PPurchase | +200.00 | $200.46 | $40.1K | No | Form 4 ↗ |
| 2025-10-29 | 2025-10-27 | Olsem Patricia Q Division President, Americas | FTax | −401.00 | — | — | No | Form 4 ↗ |
| 2025-10-29 | 2025-10-27 | Olsem Patricia Q, Division President, Americas | FTax | −335.00 | — | — | No | Form 4 ↗ |
| 2025-10-29 | 2025-10-27 | NOBLE WILLIAM B Group Managing Director | FTax | −316.00 | — | — | No | Form 4 ↗ |
| 2025-10-29 | 2025-10-27 | NOBLE WILLIAM B, Group Managing Director | FTax | −258.00 | — | — | No | Form 4 ↗ |
| 2025-10-28 | 2025-10-27 | LINDEMAN JEFFREY G VP, Chief People, Cult. & Cap. | FTax | −294.00 | — | — | No | Form 4 ↗ |
| 2025-10-28 | 2025-10-27 | LINDEMAN JEFFREY G, VP, Chief People, Cult. & Cap. | FTax | −260.00 | — | — | No | Form 4 ↗ |
| 2025-10-28 | 2025-10-27 | KIAMILEV PHENIX Q. VP, GC & Chief Compliance Ofcr | FTax | −294.00 | — | — | No | Form 4 ↗ |
| 2025-10-28 | 2025-10-27 | KIAMILEV PHENIX Q., VP, GC & Chief Compliance Ofcr | FTax | −267.00 | — | — | No | Form 4 ↗ |
| 2025-10-28 | 2025-10-27 | HYZER SARA KATHLEEN VP, Finance & CFO | FTax | −455.00 | — | — | No | Form 4 ↗ |
| 2025-10-28 | 2025-10-27 | HYZER SARA KATHLEEN, VP, Finance & CFO | FTax | −533.00 | — | — | No | Form 4 ↗ |
| 2025-10-28 | 2025-10-27 | Brass Steven A President and CEO | FTax | −1.97K | — | — | No | Form 4 ↗ |
| 2025-10-28 | 2025-10-27 | Brass Steven A, President and CEO | FTax | −2.38K | — | — | No | Form 4 ↗ |
| 2025-10-27 | 2025-10-27 | CARTER DANIEL T Director | PPurchase | +1.00K | $199.37 | $199K | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | Olsem Patricia Q Division President, Americas | AAward | +1.12K | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | Olsem Patricia Q, Division President, Americas | AAward | +1.01K | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | LINDEMAN JEFFREY G VP, Chief People, Cult. & Cap. | AAward | +821.00 | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | LINDEMAN JEFFREY G, VP, Chief People, Cult. & Cap. | AAward | +843.00 | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | KIAMILEV PHENIX Q. VP, GC & Chief Compliance Ofcr | AAward | +821.00 | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | KIAMILEV PHENIX Q., VP, GC & Chief Compliance Ofcr | AAward | +972.00 | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | HYZER SARA KATHLEEN VP, Finance & CFO | AAward | +895.00 | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | HYZER SARA KATHLEEN, VP, Finance & CFO | AAward | +1.75K | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | Brass Steven A President and CEO | AAward | +3.88K | — | — | No | Form 4 ↗ |
| 2025-10-10 | 2025-10-09 | Brass Steven A, President and CEO | AAward | +7.78K | — | — | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also WDFC’s full analysis or the market-wide insider trading feed. The tabs above jump to WDFC’s other SEC data.
Source: SEC Form 4 filings for WDFC, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.