Fastenal Company
MX ˙ BMV ˙ US3119001044
SecurityMX:FAST / Fastenal Company
InstitutionDearborn Partners Llc
Latest Disclosed Ownership377,076 shares
Latest Disclosed Value $ 17,496,309
Dearborn Partners Llc reports 30.38% decrease in ownership of FAST / Fastenal Company

On May 12, 2026 - Dearborn Partners Llc filed a 13F-HR form disclosing ownership of 377,076 shares of Fastenal Company (MX:FAST) valued at $17,496,309 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 541,595 shares of Fastenal Company. This represents a change in shares of -30.38% 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)
2026-05-12 2026-03-31 13F Fastenal COM 311900104 377,076 -164,519 -30.38 17,496 -19.50 0.9152
2026-02-11 2025-12-31 13F Fastenal COM 311900104 541,595 -22,233 -3.94 21,734 -21.40 1.0854
2025-11-10 2025-09-30 13F Fastenal COM 311900104 563,828 -186,327 -24.84 27,650 -12.24 1.2965
2025-08-14 2025-06-30 13F Fastenal COM 311900104 750,155 367,402 95.99 31,506 6.15 1.4914
2025-05-08 2025-03-31 13F Fastenal COM 311900104 382,753 -85,521 -18.26 29,683 -11.85 1.4249
2025-02-07 2024-12-31 13F Fastenal COM 311900104 468,274 -7,934 -1.67 33,674 -0.99 1.4109
2024-11-06 2024-09-30 13F Fastenal COM 311900104 476,208 -11,907 -2.44 34,011 10.88 1.3805
2024-07-26 2024-06-30 13F Fastenal COM 311900104 488,115 -6,338 -1.28 30,673 -19.58 1.3262
2024-05-08 2024-03-31 13F Fastenal COM 311900104 494,453 -164,198 -24.93 38,142 -10.59 1.6374
2024-01-26 2023-12-31 13F Fastenal COM 311900104 658,651 -13,471 -2.00 42,661 16.16 1.5540
2023-11-01 2023-09-30 13F Fastenal COM 311900104 672,122 -3,099 -0.46 36,725 -7.80 1.4411
2023-08-03 2023-06-30 13F Fastenal COM 311900104 675,221 1,058 0.16 39,831 9.53 1.5241
2023-05-04 2023-03-31 13F Fastenal COM 311900104 674,163 -3,758 -0.55 36,364 13.36 1.4305
2023-02-02 2022-12-31 13F Fastenal COM 311900104 677,921 -12,882 -1.86 32,079 0.86 1.2947
2022-11-21 2022-09-30 13F/A-1 Fastenal COM 311900104 690,803 1,676 0.24 31,805 -7.55 1.4029
2022-10-25 2022-09-30 13F Fastenal COM 311900104 690,803 1,676 31,805 1.3113
2022-07-20 2022-06-30 13F Fastenal COM 311900104 689,127 292 0.04 34,401 -15.92 1.4530
2022-05-04 2022-03-31 13F Fastenal COM 311900104 688,835 2,230 0.32 40,917 -6.97 1.5517
2022-01-28 2021-12-31 13F Fastenal COM 311900104 686,605 2,081 0.30 43,984 24.50 1.5946
2021-10-27 2021-09-30 13F Fastenal COM 311900104 684,524 1,401 0.21 35,328 -0.55 1.4349
2021-07-26 2021-06-30 13F Fastenal COM 311900104 683,123 5,619 0.83 35,522 4.28 1.4283
2021-04-29 2021-03-31 13F Fastenal COM 311900104 677,504 659,849 3,737.46 34,065 3,851.86 1.4515
2021-01-27 2020-12-31 13F Fastenal COM 311900104 17,655 5,387 43.91 862 55.88 0.0392
2020-10-20 2020-09-30 13F Fastenal COM 311900104 12,268 12,268 553 0.0275
2020-05-11 2020-03-31 13F Fastenal COM 311900104 0 -5,540 -100.00 0 -100.00
2020-01-28 2019-12-31 13F Fastenal COM 311900104 5,540 5,540 205 0.0104
2019-10-29 2019-09-30 13F Fastenal COM 311900104 0 -6,716 -100.00 0 -100.00
2019-07-29 2019-06-30 13F Fastenal COM 311900104 6,716 3,358 100.00 219 1.39 0.0134
2019-05-01 2019-03-31 13F Fastenal COM 311900104 3,358 3,358 216 0.0144
2019-02-04 2018-12-31 13F Fastenal COM 311900104 0 -4,488 -100.00 0 -100.00
2018-10-24 2018-09-30 13F Fastenal COM 311900104 4,488 0 0.00 260 20.37 0.0182
2018-08-14 2018-06-30 13F Fastenal COM 311900104 4,488 0 0.00 216 -11.84 0.0169
2018-05-01 2018-03-31 13F Fastenal COM 311900104 4,488 100 2.28 245 2.08 0.0189
2018-02-02 2017-12-31 13F Fastenal COM 311900104 4,388 0 0.00 240 20.00 0.0173
2017-11-13 2017-09-30 13F Fastenal COM 311900104 4,388 4,388 200 0.0147
2017-08-09 2017-06-30 13F Fastenal COM 311900104 0 -4,388 -100.00 0 -100.00
2017-05-15 2017-03-31 13F Fastenal COM 311900104 4,388 4,388 226 0.0176
2017-01-26 2016-12-31 13F Fastenal COM 311900104 0 -8,100 -100.00 0 -100.00
2016-10-24 2016-09-30 13F Fastenal COM 311900104 8,100 -225 -2.70 338 -8.65 0.0285
2016-07-18 2016-06-30 13F Fastenal COM 311900104 8,325 600 7.77 370 -2.37 0.0321
2016-04-19 2016-03-31 13F Fastenal COM 311900104 7,725 0 0.00 379 20.32 0.0352
2016-01-21 2015-12-31 13F Fastenal COM 311900104 7,725 -1,014 -11.60 315 -1.56 0.0293
2015-10-19 2015-09-30 13F Fastenal COM 311900104 8,739 -3,114 -26.27 320 -36.00 0.0321
2015-08-13 2015-06-30 13F Fastenal COM 311900104 11,853 -10,552 -47.10 500 -46.12 0.0482
2015-04-21 2015-03-31 13F Fastenal COM 311900104 22,405 22,405 0.00 928 0.0811
2015-01-28 2014-12-31 13F Fastenal COM 311900104 0 -20,957 -100.00 0 -100.00
2014-10-29 2014-09-30 13F Fastenal COM 311900104 20,957 296 1.43 941 -7.93 0.0911
2014-07-23 2014-06-30 13F Fastenal COM 311900104 20,661 115 0.56 1,022 0.89 0.1002
2014-05-05 2014-03-31 13F Fastenal COM 311900104 20,546 -2,140 -9.43 1,013 -6.03 0.1105
2014-02-14 2013-12-31 13F Fastenal COM 311900104 22,686 3,331 17.21 1,078 10.79 0.1257
2013-10-24 2013-09-30 13F Fastenal COM 311900104 19,355 3 0.02 973 9.82 0.1279
2013-07-22 2013-06-30 13F Fastenal COM 311900104 19,352 19,352 886 0.1259
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.