WD-40 Company
US ˙ NasdaqGS ˙ US9292361071

SecurityWDFC / WD-40 Company
InstitutionSei Investments Co
Latest Disclosed Ownership4,074 shares
Latest Disclosed Value $ 802,024
Sei Investments Co reports 13.99% increase in ownership of WDFC / WD-40 Company

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 4,074 shares of WD-40 Company (US:WDFC) valued at $802,171 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 3,574 shares of WD-40 Company. This represents a change in shares of 13.99% during the quarter. The current value of the position is $827,185 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F WD 40 COM 929236107 4,074 500 13.99 802 13.60 0.0008
2025-11-13 2025-09-30 13F WD 40 COM 929236107 3,574 130 3.77 706 -10.06 0.0008
2025-08-14 2025-06-30 13F WD 40 COM 929236107 3,444 -372 -9.75 785 -15.68 0.0009
2025-05-14 2025-03-31 13F/A-1 WD 40 COM 929236107 3,816 675 21.49 931 22.18 0.0012
2025-05-13 2025-03-31 13F WD 40 COM 929236107 3,289 148 802 0.0009
2025-02-11 2024-12-31 13F WD 40 COM 929236107 3,141 77 2.51 763 -3.54 0.0010
2024-11-12 2024-09-30 13F WD 40 COM 929236107 3,064 98 3.30 790 21.35 0.0010
2024-08-13 2024-06-30 13F WD 40 COM 929236107 2,966 244 8.96 652 -5.52 0.0009
2024-05-07 2024-03-31 13F WD 40 COM 929236107 2,722 425 18.50 690 25.50 0.0010
2024-02-14 2023-12-31 13F WD 40 COM 929236107 2,297 129 5.95 550 24.77 0.0009
2023-11-14 2023-09-30 13F WD 40 COM 929236107 2,168 43 2.02 441 9.73 0.0008
2023-08-11 2023-06-30 13F WD 40 COM 929236107 2,125 271 14.62 401 21.52 0.0007
2023-05-12 2023-03-31 13F WD 40 COM 929236107 1,854 427 29.92 330 44.10 0.0006
2023-02-10 2022-12-31 13F WD 40 COM 929236107 1,427 -4,108 -74.22 229 -76.44 0.0005
2022-11-14 2022-09-30 13F WD 40 COM 929236107 5,535 1,460 35.83 972 18.83 0.0022
2022-08-15 2022-06-30 13F WD 40 COM 929236107 4,075 -304 -6.94 818 1.24 0.0018
2022-05-13 2022-03-31 13F WD 40 COM 929236107 4,379 88 2.05 808 -19.52 0.0016
2022-02-14 2021-12-31 13F WD 40 COM 929236107 4,291 -22 -0.51 1,004 3.19 0.0019
2021-11-12 2021-09-30 13F WD 40 COM 929236107 4,313 2 0.05 973 -16.98 0.0020
2021-08-06 2021-06-30 13F WD 40 COM 929236107 4,311 -281 -6.12 1,172 -7.21 0.0026
2021-05-12 2021-03-31 13F WD-40 COM 929236107 4,592 0 0.00 1,263 0.00 0.0032
2021-02-08 2020-12-31 13F WD-40 COM 929236107 4,592 -911 -16.55 1,263 15.55 0.0033
2020-12-04 2020-09-30 13F/A-1 WD-40 COM 929236107 5,503 10 0.18 1,093 -3.27 0.0032
2020-11-06 2020-09-30 13F WD-40 COM 929236107 5,583 90 1,108 2,667.8176
2020-08-17 2020-06-30 13F/A-1 WD-40 COM 929236107 5,493 -2,074 -27.41 1,130 -23.29 0.0035
2020-08-11 2020-06-30 13F WD-40 COM 929236107 5,493 -2,074 1,129 3,062.4726
2020-05-14 2020-03-31 13F WD-40 COM 929236107 7,567 3,427 82.78 1,473 83.44 0.0054
2020-02-06 2019-12-31 13F WD-40 COM 929236107 4,140 -2,646 -38.99 803 -35.50 0.0024
2019-11-12 2019-09-30 13F WD-40 COM 929236107 6,786 2,203 48.07 1,245 70.78 0.0032
2019-08-14 2019-06-30 13F WD-40 COM 929236107 4,583 -134 -2.84 729 -8.87 0.0024
2019-05-15 2019-03-31 13F WD-40 COM 929236107 4,717 -3,529 -42.80 800 -47.02 0.0027
2019-02-13 2018-12-31 13F WD-40 COM 929236107 8,246 6,190 301.07 1,510 326.55 0.0054
2018-11-08 2018-09-30 13F WD-40 COM 929236107 2,056 -186 -8.30 354 7.93 0.0013
2018-08-03 2018-06-30 13F WD-40 COM 929236107 2,242 38 1.72 328 13.10 0.0011
2018-05-11 2018-03-31 13F WD-40 COM 929236107 2,204 2,020 1,097.83 290 1,218.18 0.0011
2018-02-08 2017-12-31 13F WD-40 COM 929236107 184 97 111.49 22 120.00 0.0001
2017-11-06 2017-09-30 13F WD-40 COM 929236107 87 19 27.94 10 25.00 0.0000
2017-07-31 2017-06-30 13F WD-40 COM 929236107 68 -356 -83.96 8 -82.61 0.0000
2017-05-05 2017-03-31 13F WD-40 COM 929236107 424 -472 -52.68 46 -56.19 0.0002
2017-02-02 2016-12-31 13F WD-40 COM 929236107 896 -239 -21.06 105 -17.97 0.0005
2016-11-04 2016-09-30 13F WD-40 COM 929236107 1,135 421 58.96 128 52.38 0.0007
2016-08-11 2016-06-30 13F WD-40 COM 929236107 714 411 135.64 84 154.55 0.0005
2016-05-10 2016-03-31 13F/A-1 WD-40 COM 929236107 303 270 818.18 33 1,000.00 0.0002
2016-02-03 2015-12-31 13F WD-40 COM 929236107 33 33 0.00 3 0.0000
2015-05-01 2015-03-31 13F WD-40 COM 929236107 0 -14 -100.00 0 -100.00
2015-02-10 2014-12-31 13F WD-40 COM 929236107 14 14 1 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.