Fastenal Company
MX ˙ BMV ˙ US3119001044
SecurityMX:FAST / Fastenal Company
InstitutionEmpirical Finance, LLC
Latest Disclosed Ownership38,823 shares
Latest Disclosed Value $ 1,801,387
Empirical Finance, LLC reports 0.15% decrease in ownership of FAST / Fastenal Company

On May 14, 2026 - Empirical Finance, LLC filed a 13F-HR/A form disclosing ownership of 38,823 shares of Fastenal Company (MX:FAST) valued at $1,801,387 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 38,883 shares of Fastenal Company. This represents a change in shares of -0.15% during the quarter.

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)
2026-05-14 2026-03-31 13F/A-1 FASTENAL COM 311900104 38,823 -60 -0.15 1,801 15.45 0.0846
2026-05-14 2026-03-31 13F FASTENAL COM 311900104 38,823 -60 1,801 0.0846
2026-02-12 2025-12-31 13F FASTENAL COM 311900104 38,883 -1,701 -4.19 1,560 -21.61 0.0744
2025-11-13 2025-09-30 13F FASTENAL COM 311900104 40,584 390 0.97 1,990 17.89 0.0948
2025-08-11 2025-06-30 13F FASTENAL COM 311900104 40,194 20,226 101.29 1,688 9.04 0.0884
2025-05-07 2025-03-31 13F FASTENAL COM 311900104 19,968 450 2.31 1,549 10.33 0.0935
2025-01-28 2024-12-31 13F FASTENAL COM 311900104 19,518 -257 -1.30 1,404 -0.64 0.0812
2024-11-06 2024-09-30 13F FASTENAL COM 311900104 19,775 411 2.12 1,412 16.12 0.0823
2024-07-30 2024-06-30 13F FASTENAL COM 311900104 19,364 -1,303 -6.30 1,217 -23.71 0.0760
2024-05-06 2024-03-31 13F FASTENAL COM 311900104 20,667 690 3.45 1,594 23.28 0.0978
2024-02-14 2023-12-31 13F FASTENAL COM 311900104 19,977 154 0.78 1,294 19.39 0.0902
2023-11-02 2023-09-30 13F FASTENAL COM 311900104 19,823 1,958 10.96 1,083 2.85 0.0796
2023-07-27 2023-06-30 13F FASTENAL COM 311900104 17,865 2,017 12.73 1,054 23.30 0.0816
2023-04-05 2023-03-31 13F FASTENAL COM 311900104 15,848 744 4.93 855 19.61 0.0801
2023-02-21 2022-12-31 13F/A-1 FASTENAL COM 311900104 15,104 1,183 8.50 715 11.39 0.0740
2023-01-24 2022-12-31 13F FASTENAL COM 311900104 15,104 1,183 1 0.0740
2022-11-04 2022-09-30 13F FASTENAL COM 311900104 13,921 2,254 19.32 641 10.14 0.0760
2022-08-01 2022-06-30 13F FASTENAL COM 311900104 11,667 633 5.74 582 -11.15 0.0742
2022-04-21 2022-03-31 13F FASTENAL COM 311900104 11,034 1,192 12.11 655 3.97 0.0734
2022-02-04 2021-12-31 13F FASTENAL COM 311900104 9,842 2,635 36.56 630 69.35 0.0744
2021-11-12 2021-09-30 13F FASTENAL COM 311900104 7,207 413 6.08 372 5.38 0.0561
2021-08-10 2021-06-30 13F/A-1 FASTENAL COM 311900104 6,794 1,019 17.65 353 25.18 0.0575
2021-08-04 2021-06-30 13F FASTENAL COM 311900104 5,775 0 282 0.0496
2021-05-13 2021-03-31 13F FASTENAL COM 311900104 5,775 0 0.00 282 0.00 0.0496
2021-02-02 2020-12-31 13F FASTENAL COM 311900104 5,775 1,008 21.15 282 31.16 0.0496
2020-10-28 2020-09-30 13F/A-1 FASTENAL COM 311900104 4,767 4,767 215 0.0461
2017-05-11 2017-03-31 13F FASTENAL COM 311900104 0 -131 -100.00 0 -100.00
2017-02-13 2016-12-31 13F FASTENAL COM 311900104 131 131 7 0.0047
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.