Fastenal Company
MX ˙ BMV ˙ US3119001044
SecurityMX:FAST / Fastenal Company
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership6,872,867 shares
Latest Disclosed Value $ 318,853,924
Dimensional Fund Advisors Lp reports 2.44% increase in ownership of FAST / Fastenal Company

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 6,872,867 shares of Fastenal Company (MX:FAST) valued at $318,853,924 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 6,708,901 shares of Fastenal Company. This represents a change in shares of 2.44% 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)
2026-05-07 2026-03-31 13F FASTENAL COM 311900104 6,872,867 163,966 2.44 318,854 18.42 0.0143
2026-02-12 2025-12-31 13F FASTENAL COM 311900104 6,708,901 -169,160 -2.46 269,258 -20.17 0.0565
2025-11-12 2025-09-30 13F FASTENAL COM 311900104 6,878,061 -478,846 -6.51 337,293 9.16 0.0724
2025-08-12 2025-06-30 13F FASTENAL COM 311900104 7,356,907 3,656,607 98.82 308,992 7.69 0.0715
2025-05-13 2025-03-31 13F FASTENAL COM 311900104 3,700,300 -129,335 -3.38 286,928 4.19 0.0713
2025-02-13 2024-12-31 13F FASTENAL COM 311900104 3,829,635 51,534 1.36 275,393 2.06 0.0661
2024-11-07 2024-09-30 13F FASTENAL COM 311900104 3,778,101 -59,429 -1.55 269,833 11.89 0.0654
2024-08-09 2024-06-30 13F FASTENAL COM 311900104 3,837,530 636,546 19.89 241,161 -2.33 0.0630
2024-05-10 2024-03-31 13F FASTENAL COM 311900104 3,200,984 103,728 3.35 246,924 23.09 0.0669
2024-02-07 2023-12-31 13F FASTENAL COM 311900104 3,097,256 60,490 1.99 200,611 20.89 0.0586
2023-11-09 2023-09-30 13F FASTENAL COM 311900104 3,036,766 24,280 0.81 165,946 -6.62 0.0544
2023-08-09 2023-06-30 13F FASTENAL COM 311900104 3,012,486 8,584 0.29 177,703 9.68 0.0566
2023-05-12 2023-03-31 13F FASTENAL COM 311900104 3,003,902 9,544 0.32 162,017 114,805.67 0.0546
2023-02-09 2022-12-31 13F FASTENAL COM 311900104 2,994,358 -156,063 -4.95 142 -99.90 0.0419
2022-11-10 2022-09-30 13F FASTENAL COM 311900104 3,150,421 38,609 1.24 145,054 -6.62 0.0557
2022-08-12 2022-06-30 13F FASTENAL COM 311900104 3,111,812 -4,969 -0.16 155,333 -16.10 0.0557
2022-05-13 2022-03-31 13F FASTENAL COM 311900104 3,116,781 -217,183 -6.51 185,141 -13.31 0.0570
2022-02-09 2021-12-31 13F FASTENAL COM 311900104 3,333,964 35,587 1.08 213,569 25.45 0.0646
2021-11-12 2021-09-30 13F FASTENAL COM 311900104 3,298,377 74,966 2.33 170,247 1.57 0.0548
2021-08-12 2021-06-30 13F FASTENAL COM 311900104 3,223,411 121,174 3.91 167,614 7.46 0.0531
2021-05-14 2021-03-31 13F FASTENAL COM 311900104 3,102,237 15,357 0.50 155,985 3.48 0.0516
2021-03-08 2020-12-31 13F/A-2 FASTENAL COM 311900104 3,086,880 211,732 7.36 150,736 16.27 0.0544
2021-02-11 2020-12-31 13F FASTENAL COM 311900104 3,086,880 211,732 150,736 54,437.8311
2020-11-12 2020-09-30 13F FASTENAL COM 311900104 2,875,148 12,619 0.44 129,642 5.73 0.0550
2020-08-13 2020-06-30 13F FASTENAL COM 311900104 2,862,529 64,784 2.32 122,615 40.24 0.0539
2020-05-14 2020-03-31 13F FASTENAL COM 311900104 2,797,745 14,157 0.51 87,433 -14.99 0.0455
2020-02-14 2019-12-31 13F FASTENAL COM 311900104 2,783,588 6,355 0.23 102,854 13.37 0.0375
2019-11-12 2019-09-30 13F FASTENAL COM 311900104 2,777,233 59,234 2.18 90,727 2.43 0.0353
2019-08-13 2019-06-30 13F FASTENAL COM 311900104 2,717,999 1,382,590 103.53 88,575 3.14 0.0344
2019-08-12 2019-03-31 13F/A-2 FASTENAL COM 311900104 1,335,409 52,559 4.10 85,876 28.02 0.0342
2019-05-10 2019-03-31 13F FASTENAL COM 311900104 1,335,409 52,559 85,876
2019-02-26 2018-12-31 13F/A-1 FASTENAL COM 311900104 1,282,850 192,809 17.69 67,081 6.07 0.0304
2019-02-13 2018-12-31 13F FASTENAL COM 311900104 1,282,850 192,809 67,081
2018-11-13 2018-09-30 13F FASTENAL COM 311900104 1,090,041 28,397 2.67 63,244 23.76 0.0241
2018-08-10 2018-06-30 13F FASTENAL COM 311900104 1,061,644 22,390 2.15 51,102 -9.93 0.0204
2018-05-11 2018-03-31 13F FASTENAL COM 311900104 1,039,254 28,804 2.85 56,733 2.65 0.0236
2018-02-12 2017-12-31 13F FASTENAL COM 311900104 1,010,450 23,901 2.42 55,266 22.90 0.0229
2017-11-13 2017-09-30 13F FASTENAL COM 311900104 986,549 2,249 0.23 44,968 4.96 0.0197
2017-08-11 2017-06-30 13F FASTENAL COM 311900104 984,300 70,281 7.69 42,841 -8.98 0.0198
2017-05-12 2017-03-31 13F FASTENAL COM 311900104 914,019 52,498 6.09 47,070 16.29 0.0225
2017-02-09 2016-12-31 13F FASTENAL COM 311900104 861,521 -9,780 -1.12 40,476 11.20 0.0202
2016-11-10 2016-09-30 13F FASTENAL COM 311900104 871,301 44,974 5.44 36,398 -0.76 0.0197
2016-08-09 2016-06-30 13F FASTENAL COM 311900104 826,327 14,244 1.75 36,676 -7.83 0.0211
2016-05-13 2016-03-31 13F FASTENAL COM 311900104 812,083 40,052 5.19 39,791 26.25 0.0238
2016-02-10 2015-12-31 13F FASTENAL COM 311900104 772,031 39,898 5.45 31,518 17.59 0.0196
2015-11-13 2015-09-30 13F FASTENAL COM 311900104 732,133 53,964 7.96 26,804 -6.30 0.0176
2015-08-14 2015-06-30 13F FASTENAL COM 311900104 678,169 82,064 13.77 28,607 15.82 0.0175
2015-05-14 2015-03-31 13F FASTENAL COM 311900104 596,105 23,505 4.10 24,700 -9.31 0.0156
2015-02-06 2014-12-31 13F FASTENAL COM 311900104 572,600 19,095 3.45 27,237 9.58 0.0179
2014-11-13 2014-09-30 13F FASTENAL COM 311900104 553,505 43,895 8.61 24,855 -1.45 0.0176
2014-08-08 2014-06-30 13F FASTENAL COM 311900104 509,610 130,731 34.50 25,221 34.99 0.0175
2014-05-14 2014-03-31 13F FASTENAL COM 311900104 378,879 45,818 13.76 18,683 18.07 0.0140
2014-02-12 2013-12-31 13F FASTENAL COM 311900104 333,061 2,261 0.68 15,824 -4.79 0.0123
2013-11-13 2013-09-30 13F FASTENAL COM 311900104 330,800 15,729 4.99 16,620 15.02 0.0144
2013-08-15 2013-06-30 13F FASTENAL COM 311900104 315,071 315,071 14,450 0.0136
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.