Fastenal Company
MX ˙ BMV ˙ US3119001044
SecurityMX:FAST / Fastenal Company
InstitutionDuncker Streett & Co Inc
Latest Disclosed Ownership10,865 shares
Latest Disclosed Value $ 504,136
Duncker Streett & Co Inc ownership in FAST / Fastenal Company

On April 29, 2026 - Duncker Streett & Co Inc filed a 13F-HR form disclosing ownership of 10,865 shares of Fastenal Company (MX:FAST) valued at $504,136 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 10,865 shares of Fastenal Company. This represents a change in shares of 0.00% 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)
2026-04-29 2026-03-31 13F FASTENAL COM 311900104 10,865 0 0.00 504 15.60 0.0958
2026-01-27 2025-12-31 13F FASTENAL COM 311900104 10,865 -207 -1.87 436 -19.56 0.0775
2025-10-23 2025-09-30 13F FASTENAL COM 311900104 11,072 0 0.00 543 16.56 0.0946
2025-07-28 2025-06-30 13F FASTENAL COM 311900104 11,072 5,536 100.00 465 8.39 0.0849
2025-04-22 2025-03-31 13F FASTENAL COM 311900104 5,536 -2,731 -33.03 429 -27.78 0.0851
2025-02-05 2024-12-31 13F FASTENAL COM 311900104 8,267 0 0.00 594 0.68 0.1104
2024-11-12 2024-09-30 13F FASTENAL COM 311900104 8,267 -600 -6.77 590 5.92 0.1077
2024-07-31 2024-06-30 13F FASTENAL COM 311900104 8,867 0 0.00 557 -18.57 0.1071
2024-04-23 2024-03-31 13F FASTENAL COM 311900104 8,867 -8,000 -47.43 684 -37.36 0.1350
2024-01-30 2023-12-31 13F FASTENAL COM 311900104 16,867 -200 -1.17 1,092 17.17 0.2306
2023-10-26 2023-09-30 13F FASTENAL COM 311900104 17,067 0 0.00 933 -7.36 0.2170
2023-07-20 2023-06-30 13F FASTENAL COM 311900104 17,067 0 0.00 1,007 9.35 0.2252
2023-04-24 2023-03-31 13F FASTENAL COM 311900104 17,067 -1,500 -8.08 921 4.78 0.2193
2023-01-25 2022-12-31 13F FASTENAL COM 311900104 18,567 0 0.00 879 2.69 0.2121
2022-11-04 2022-09-30 13F FASTENAL COM 311900104 18,567 -816 -4.21 855 -11.67 0.2218
2022-08-04 2022-06-30 13F FASTENAL COM 311900104 19,383 0 0.00 968 -15.90 0.2320
2022-05-09 2022-03-31 13F FASTENAL COM 311900104 19,383 -1,300 -6.29 1,151 -13.13 0.2289
2022-02-08 2021-12-31 13F FASTENAL COM 311900104 20,683 0 0.00 1,325 24.18 0.2281
2021-11-03 2021-09-30 13F FASTENAL COM 311900104 20,683 -5,200 -20.09 1,067 -20.73 0.2020
2021-07-27 2021-06-30 13F FASTENAL COM 311900104 25,883 -5,631 -17.87 1,346 -15.08 0.2482
2021-04-28 2021-03-31 13F FASTENAL COM 311900104 31,514 -4,600 -12.74 1,585 -10.10 0.3022
2021-02-02 2020-12-31 13F FASTENAL COM 311900104 36,114 1,000 2.85 1,763 11.37 0.3411
2020-10-28 2020-09-30 13F FASTENAL COM 311900104 35,114 10 0.03 1,583 5.25 0.3456
2020-07-22 2020-06-30 13F FASTENAL COM 311900104 35,104 0 0.00 1,504 37.10 0.3579
2020-04-27 2020-03-31 13F FASTENAL COM 311900104 35,104 -1,433 -3.92 1,097 -18.74 0.2929
2020-01-27 2019-12-31 13F FASTENAL COM 311900104 36,537 -725 -1.95 1,350 10.93 0.2832
2019-10-31 2019-09-30 13F FASTENAL COM 311900104 37,262 146 0.39 1,217 0.58 0.2830
2019-07-24 2019-06-30 13F FASTENAL COM 311900104 37,116 18,408 98.40 1,210 0.58 0.2716
2019-04-29 2019-03-31 13F FASTENAL COM 311900104 18,708 0 0.00 1,203 23.01 0.2772
2019-01-24 2018-12-31 13F FASTENAL COM 311900104 18,708 0 0.00 978 -9.86 0.2618
2018-10-22 2018-09-30 13F FASTENAL COM 311900104 18,708 600 3.31 1,085 24.43 0.2464
2018-07-23 2018-06-30 13F FASTENAL COM 311900104 18,108 -2,200 -10.83 872 -21.37 0.2163
2018-04-26 2018-03-31 13F FASTENAL COM 311900104 20,308 2 0.01 1,109 -0.18 0.2807
2018-01-23 2017-12-31 13F FASTENAL COM 311900104 20,306 -397 -1.92 1,111 17.69 0.2856
2017-10-25 2017-09-30 13F FASTENAL COM 311900104 20,703 6,453 45.28 944 52.26 0.2857
2017-07-21 2017-06-30 13F FASTENAL COM 311900104 14,250 -955 -6.28 620 -20.82 0.1933
2017-04-25 2017-03-31 13F FASTENAL COM 311900104 15,205 500 3.40 783 13.31 0.2455
2017-01-26 2016-12-31 13F FASTENAL COM 311900104 14,705 1,050 7.69 691 21.02 0.2298
2016-10-20 2016-09-30 13F FASTENAL COM 311900104 13,655 0 0.00 571 -5.78 0.1978
2016-07-20 2016-06-30 13F FASTENAL COM 311900104 13,655 300 2.25 606 -7.34 0.2155
2016-04-25 2016-03-31 13F FASTENAL COM 311900104 13,355 -1,228 -8.42 654 9.92 0.2421
2016-01-20 2015-12-31 13F FASTENAL COM 311900104 14,583 250 1.74 595 13.33 0.2230
2015-10-27 2015-09-30 13F FASTENAL COM 311900104 14,333 0 0.00 525 -13.22 0.2041
2015-07-20 2015-06-30 13F FASTENAL COM 311900104 14,333 -3,300 -18.71 605 -17.24 0.2108
2015-04-28 2015-03-31 13F FASTENAL COM 311900104 17,633 -1,730 -8.93 731 -20.63 0.2392
2015-01-22 2014-12-31 13F FASTENAL COM 311900104 19,363 -1,115 -5.44 921 0.22 0.3019
2014-10-23 2014-09-30 13F FASTENAL COM 311900104 20,478 -5,200 -20.25 919 -27.69 0.3133
2014-07-23 2014-06-30 13F FASTENAL COM 311900104 25,678 4,528 21.41 1,271 21.86 0.4112
2014-04-23 2014-03-31 13F FASTENAL COM 311900104 21,150 0 0.00 1,043 3.78 0.3691
2014-01-22 2013-12-31 13F FASTENAL COM 311900104 21,150 0 0.00 1,005 -5.46 0.3617
2013-10-23 2013-09-30 13F FASTENAL COM 311900104 21,150 0 0.00 1,063 9.81 0.4304
2013-07-26 2013-06-30 13F FASTENAL COM 311900104 21,150 21,150 968 0.3707
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.