Fastenal Company
MX ˙ BMV ˙ US3119001044
SecurityMX:FAST / Fastenal Company
InstitutionRiverbridge Partners Llc
Latest Disclosed Ownership2,221,882 shares
Latest Disclosed Value $ 103,095,317
Riverbridge Partners Llc reports 6.70% decrease in ownership of FAST / Fastenal Company

On April 17, 2026 - Riverbridge Partners Llc filed a 13F-HR form disclosing ownership of 2,221,882 shares of Fastenal Company (MX:FAST) valued at $103,095,317 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 13, 2026 disclosing 2,381,560 shares of Fastenal Company. This represents a change in shares of -6.70% 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)
2026-04-17 2026-03-31 13F Fastenal COM 311900104 2,221,882 -159,678 -6.70 103,095 7.87 2.5232
2026-01-13 2025-12-31 13F Fastenal COM 311900104 2,381,560 -125,690 -5.01 95,572 -22.27 1.7917
2025-10-14 2025-09-30 13F Fastenal COM 311900104 2,507,250 -110,684 -4.23 122,956 11.83 2.0748
2025-07-15 2025-06-30 13F Fastenal COM 311900104 2,617,934 1,275,815 95.06 109,953 5.64 1.7691
2025-04-21 2025-03-31 13F Fastenal COM 311900104 1,342,119 -19,054 -1.40 104,081 6.33 1.6697
2025-01-17 2024-12-31 13F Fastenal COM 311900104 1,361,173 -766,484 -36.02 97,882 -35.59 1.3358
2024-10-15 2024-09-30 13F Fastenal COM 311900104 2,127,657 -110,525 -4.94 151,957 8.04 2.0296
2024-07-17 2024-06-30 13F Fastenal COM 311900104 2,238,182 -60,720 -2.64 140,647 -20.69 1.9112
2024-04-26 2024-03-31 13F Fastenal COM 311900104 2,298,902 -645,087 -21.91 177,337 -7.00 2.1637
2024-02-15 2023-12-31 13F/A-1 Fastenal COM 311900104 2,943,989 -270,057 -8.40 190,682 8.58 2.3822
2024-01-24 2023-12-31 13F Fastenal COM 311900104 2,680,027 -229,970 173,585 2.3066
2024-02-15 2023-09-30 13F/A-1 Fastenal COM 311900104 3,214,046 -125,928 -3.77 175,615 -10.87 2.3966
2023-10-16 2023-09-30 13F Fastenal COM 311900104 2,909,997 -429,977 159,002 2.3068
2023-07-25 2023-06-30 13F Fastenal COM 311900104 3,339,974 124,312 3.87 197,025 13.59 2.4838
2023-04-21 2023-03-31 13F Fastenal COM 311900104 3,215,662 -49,072 -1.50 173,453 112,531.17 2.4315
2023-01-11 2022-12-31 13F Fastenal COM 311900104 3,264,734 -125,142 -3.69 154 -99.90 2.3194
2022-10-26 2022-09-30 13F Fastenal COM 311900104 3,389,876 415,192 13.96 156,070 5.10 2.3174
2022-08-29 2022-06-30 13F/A-1 Fastenal COM 311900104 2,974,684 -570,355 -16.09 148,496 -29.48 2.3769
2022-07-11 2022-06-30 13F Fastenal COM 311900104 3,469,815 -75,224 173,213 2.4780
2022-04-20 2022-03-31 13F Fastenal COM 311900104 3,545,039 -91,627 -2.52 210,575 -9.61 2.3797
2022-01-14 2021-12-31 13F Fastenal COM 311900104 3,636,666 -6,984 -0.19 232,965 23.89 2.3039
2021-10-26 2021-09-30 13F Fastenal COM 311900104 3,643,650 18,033 0.50 188,049 -0.26 1.8854
2021-07-26 2021-06-30 13F Fastenal COM 311900104 3,625,617 119,334 3.40 188,532 6.94 1.9144
2021-04-21 2021-03-31 13F Fastenal COM 311900104 3,506,283 63,989 1.86 176,296 4.88 2.0080
2021-01-22 2020-12-31 13F Fastenal COM 311900104 3,442,294 117,440 3.53 168,087 12.12 1.8568
2020-10-08 2020-09-30 13F Fastenal COM 311900104 3,324,854 169,695 5.38 149,918 10.91 2.0923
2020-07-08 2020-06-30 13F Fastenal COM 311900104 3,155,159 113,804 3.74 135,167 42.22 2.1214
2020-04-13 2020-03-31 13F Fastenal COM 311900104 3,041,355 -53,066 -1.71 95,042 -16.88 1.9896
2020-01-14 2019-12-31 13F Fastenal COM 311900104 3,094,421 -1,546 -0.05 114,339 13.04 2.0528
2019-10-11 2019-09-30 13F Fastenal COM 311900104 3,095,967 42,547 1.39 101,145 1.64 1.9165
2019-07-10 2019-06-30 13F Fastenal COM 311900104 3,053,420 1,454,579 90.98 99,511 -3.22 1.8824
2019-04-04 2019-03-31 13F Fastenal COM 311900104 1,598,841 -56,921 -3.44 102,821 18.76 1.9969
2019-01-14 2018-12-31 13F Fastenal COM 311900104 1,655,762 -66,656 -3.87 86,580 -13.36 1.8054
2018-10-03 2018-09-30 13F Fastenal COM 311900104 1,722,418 -41,077 -2.33 99,935 17.74 1.6708
2018-07-03 2018-06-30 13F Fastenal COM 311900104 1,763,495 -47,702 -2.63 84,877 -14.16 1.5300
2018-04-03 2018-03-31 13F Fastenal COM 311900104 1,811,197 -23,700 -1.29 98,873 -1.47 1.8055
2018-01-24 2017-12-31 13F Fastenal COM 311900104 1,834,897 -96,539 -5.00 100,351 13.99 1.9406
2017-11-01 2017-09-30 13F Fastenal COM 311900104 1,931,436 49,800 2.65 88,035 7.48 1.7339
2017-07-24 2017-06-30 13F Fastenal COM 311900104 1,881,636 -10,356 -0.55 81,908 -15.94 1.5664
2017-04-25 2017-03-31 13F Fastenal COM 311900104 1,891,992 -55,922 -2.87 97,438 6.47 1.9570
2017-01-20 2016-12-31 13F Fastenal COM 311900104 1,947,914 -51,473 -2.57 91,513 9.55 1.9113
2016-10-24 2016-09-30 13F Fastenal COM 311900104 1,999,387 -62,526 -3.03 83,534 -8.73 1.6718
2016-08-01 2016-06-30 13F Fastenal COM 311900104 2,061,913 -18,878 -0.91 91,528 -10.23 1.8974
2016-04-27 2016-03-31 13F Fastenal COM 311900104 2,080,791 95,978 4.84 101,959 25.84 2.1238
2016-01-28 2015-12-31 13F Fastenal COM 311900104 1,984,813 553,889 38.71 81,020 54.66 1.6647
2015-10-23 2015-09-30 13F Fastenal COM 311900104 1,430,924 4,370 0.31 52,386 -12.94 1.0795
2015-07-20 2015-06-30 13F Fastenal COM 311900104 1,426,554 -99,501 -6.52 60,172 -4.84 1.1347
2015-04-23 2015-03-31 13F Fastenal COM 311900104 1,526,055 14,765 0.98 63,232 -12.03 1.1372
2015-01-20 2014-12-31 13F Fastenal COM 311900104 1,511,290 18,865 1.26 71,877 7.26 1.3360
2014-11-05 2014-09-30 13F Fastenal COM 311900104 1,492,425 -60,740 -3.91 67,010 -12.82 1.3063
2014-07-31 2014-06-30 13F Fastenal COM 311900104 1,553,165 103,726 7.16 76,866 7.57 1.3399
2014-05-09 2014-03-31 13F Fastenal COM 311900104 1,449,439 120,173 9.04 71,457 13.15 1.2933
2014-02-10 2013-12-31 13F Fastenal COM 311900104 1,329,266 129,259 10.77 63,153 4.69 1.1451
2013-11-04 2013-09-30 13F Fastenal COM 311900104 1,200,007 57,103 5.00 60,324 15.27 1.3105
2013-08-09 2013-06-30 13F Fastenal COM 311900104 1,142,904 1,142,904 52,334 1.3044
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.