Fastenal Company
MX ˙ BMV ˙ US3119001044
SecurityMX:FAST / Fastenal Company
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership15,377,769 shares
Latest Disclosed Value $ 713,528,508
Baird Financial Group, Inc. reports 3.62% increase in ownership of FAST / Fastenal Company

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 15,377,769 shares of Fastenal Company (MX:FAST) valued at $713,528,508 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 14,840,071 shares of Fastenal Company. This represents a change in shares of 3.62% 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 FASTENAL COM 311900104 15,377,769 537,698 3.62 713,529 19.81 0.5999
2026-02-13 2025-12-31 13F FASTENAL CO COM COMMON 311900104 14,840,071 261,527 1.79 595,532 -16.70 0.9283
2025-11-13 2025-09-30 13F FASTENAL COMMON 311900104 14,578,544 191,104 1.33 714,932 18.31 1.1497
2025-08-13 2025-06-30 13F FASTENAL CO COM COMMON 311900104 14,387,440 5,968,675 70.90 604,272 -7.44 1.0596
2025-05-15 2025-03-31 13F FASTENAL CO COM COMMON 311900104 8,418,765 142,972 1.73 652,875 9.71 1.2571
2025-02-14 2024-12-31 13F FASTENAL COMMON 311900104 8,275,793 74,903 0.91 595,112 1.61 1.1381
2024-11-14 2024-09-30 13F FASTENAL COMMON 311900104 8,200,890 19,719 0.24 585,708 13.93 1.1374
2024-08-14 2024-06-30 13F FASTENAL COMMON 311900104 8,181,171 169,524 2.12 514,105 -16.81 1.0665
2024-05-14 2024-03-31 13F FASTENAL COMMON 311900104 8,011,647 83,438 1.05 618,018 20.35 1.2959
2024-02-14 2023-12-31 13F FASTENAL COMMON 311900104 7,928,209 1,043,529 15.16 513,510 36.51 1.1703
2023-11-13 2023-09-30 13F FASTENAL COMMON 311900104 6,884,680 219,246 3.29 376,179 -4.33 1.0261
2023-08-11 2023-06-30 13F FASTENAL COMMON 311900104 6,665,434 -1,948,267 -22.62 393,194 -15.37 1.0378
2023-05-15 2023-03-31 13F FASTENAL COMMON 311900104 8,613,701 364,024 4.41 464,623 119,034.10 1.1461
2023-02-13 2022-12-31 13F FASTENAL COMMON 311900104 8,249,677 1,537,417 22.90 390 -99.87 1.0280
2022-11-15 2022-09-30 13F FASTENAL COMMON 311900104 6,712,260 143,378 2.18 309,032 -5.76 0.9106
2022-08-08 2022-06-30 13F FASTENAL COMMON 311900104 6,568,882 107,418 1.66 327,919 -14.56 0.9103
2022-05-13 2022-03-31 13F FASTENAL COMMON 311900104 6,461,464 344,450 5.63 383,811 -2.05 0.9484
2022-02-09 2021-12-31 13F FASTENAL CO COM COMMON 311900104 6,117,014 9,995 0.16 391,856 24.33 0.9161
2021-11-12 2021-09-30 13F FASTENAL CO COM COMMON 311900104 6,107,019 26,749 0.44 315,183 -0.31 0.8061
2021-08-11 2021-06-30 13F FASTENAL CO COM COMMON 311900104 6,080,270 289,891 5.01 316,174 8.60 0.8218
2021-05-13 2021-03-31 13F FASTENAL CO COM COMMON 311900104 5,790,379 -56,914 -0.97 291,141 1.97 0.8165
2021-02-11 2020-12-31 13F FASTENAL CO COM COMMON 311900104 5,847,293 29,990 0.52 285,524 8.85 0.8535
2020-11-12 2020-09-30 13F FASTENAL CO COM COMMON 311900104 5,817,303 122,789 2.16 262,302 7.52 0.8987
2020-10-22 2020-06-30 13F/A-1 FASTENAL CO COM COMMON 311900104 5,694,514 39,374 0.70 243,953 38.04 0.9190
2020-08-14 2020-06-30 13F FASTENAL CO COM COMMON 311900104 5,837,677 182,537 233,306 462,359.4856
2020-05-14 2020-03-31 13F FASTENAL CO COM COMMON 311900104 5,655,140 -148,259 -2.55 176,723 -17.59 0.8071
2020-02-14 2019-12-31 13F FASTENAL CO COM COMMON 311900104 5,803,399 -28,352 -0.49 214,436 12.55 0.7698
2019-11-14 2019-09-30 13F FASTENAL Common 311900104 5,831,751 27,787 0.48 190,523 0.73 0.7504
2019-08-14 2019-06-30 13F FASTENAL COMMON 311900104 5,803,964 4,858,255 513.72 189,151 211.01 0.7355
2019-05-14 2019-03-31 13F FASTENAL COMMON 311900104 945,709 10,912 1.17 60,819 24.42 0.3556
2019-02-14 2018-12-31 13F FASTENAL COMMON 311900104 934,797 154,435 19.79 48,881 8.09 0.3318
2018-11-13 2018-09-30 13F Fastenal COMMON 311900104 780,362 -274,025 -25.99 45,222 -10.89 0.2833
2018-08-13 2018-06-30 13F Fastenal COMMON 311900104 1,054,387 -69,411 -6.18 50,748 -17.28 0.3444
2018-05-14 2018-03-31 13F Fastenal COMMON 311900104 1,123,798 -25,200 -2.19 61,349 -2.37 0.4320
2018-02-09 2017-12-31 13F FASTENAL COMMON 311900104 1,148,998 84,275 7.92 62,839 29.48 0.4451
2017-11-14 2017-09-30 13F FASTENAL COMMON 311900104 1,064,723 105,727 11.02 48,530 16.25 0.3660
2017-08-14 2017-06-30 13F FASTENAL COMMON 311900104 958,996 -19,795 -2.02 41,745 -17.19 0.3270
2017-06-19 2017-03-31 13F/A-1 FASTENAL COMMON 311900104 978,791 31,072 3.28 50,408 13.22 0.4077
2017-05-09 2017-03-31 13F FASTENAL COMMON 311900104 978,791 50,408
2017-02-10 2016-12-31 13F FASTENAL COMMON 311900104 947,719 200,345 26.81 44,524 42.59 0.3866
2016-11-10 2016-09-30 13F FASTENAL COMMON 311900104 747,374 -478,235 -39.02 31,225 -42.61 0.2797
2016-08-11 2016-06-30 13F FASTENAL COMMON 311900104 1,225,609 60,628 5.20 54,404 -4.69 0.4989
2016-05-12 2016-03-31 13F FASTENAL COMMON 311900104 1,164,981 -35,097 -2.92 57,084 16.53 0.5462
2016-02-11 2015-12-31 13F FASTENAL COMMON 311900104 1,200,078 -64,477 -5.10 48,987 5.81 0.4900
2015-11-12 2015-09-30 13F FASTENAL COMMON 311900104 1,264,555 -5,119 -0.40 46,295 -13.56 0.4922
2015-08-14 2015-06-30 13F FASTENAL COMMON 311900104 1,269,674 1,269,674 53,555 0.5270
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.