WD 40 (WDFC)

As of 30 September 2026, short interest in WDFC is 552,633 shares, down 7,533 shares over the last month. Over the last 48 readings it ranged from 490,134 shares (15 July 2026) to 1,295,673 shares (15 October 2024). The latest reading sits at the bottom of that range. At the reported average volume of 141K shares a day that is 3.9 days to cover.

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As of 9 October 2026, the short share of WDFC volume is 65.3%, down 5.4 points over the last five sessions. Over the last 30 readings it ranged from 48.2% (18 September 2026) to 74.9% (4 September 2026). The latest reading is 2.8 points above the 30-session average of 62.5%, on 31K shares reported.

As of 11 September 2026, the fails-to-deliver balance in WDFC is 186 shares, up 160 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (13 April 2026) to 12,350 shares (27 March 2026). The latest reading sits at the bottom of that range.

Insiders at WDFC reported 2 open-market sells worth $117K in the last 90 days and no open-market buys. Latest filing: Olsem Patricia Q (Division President, Americas) on 2026-08-13.

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

1 Form 144 notice on file for WDFC worth $136K at the prices reported; 1 in the last 90 days worth $136K. Latest: Olsem Patricia Q filed on 2026-08-07 to sell 600 shares ($136K) from 2026-08-07.

3 holders report 5% or more of WDFC in their latest filing, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 14.3% of the class (1,930,742 shares), filed 2025-10-17 for an event on 2025-09-30.

7 of the 30 tracked managers held WDFC at their latest 13F, $135.3M in total at quarter-end prices. Two Sigma Investments is the largest at $50.0M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 4 cut.

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

In Q3 FY 2026 (quarter ended 2026-05-31) WD 40 reported revenue of $195.1M, up 24.3% from the same quarter a year earlier, and net income of $30.2M (2.24 diluted EPS). In FY 2025 it generated $87.9M of operating cash flow and spent $12.3M on buybacks and $50.3M on dividends. As of 2026-05-31, cash was $59.1M against $85.3M of debt.

Quarterly, last 8 quarters

Fiscal years, with buybacks and dividends

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-05-31; shares outstanding as of 2026-07-02 from the cover page.