Fastenal Company
MX ˙ BMV ˙ US3119001044
SecurityMX:FAST / Fastenal Company
InstitutionCullinan Associates Inc
Latest Disclosed Ownership123,196 shares
Latest Disclosed Value $ 5,716,294
Cullinan Associates Inc reports 1.16% increase in ownership of FAST / Fastenal Company

On May 1, 2026 - Cullinan Associates Inc filed a 13F-HR form disclosing ownership of 123,196 shares of Fastenal Company (MX:FAST) valued at $5,716,294 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 121,782 shares of Fastenal Company. This represents a change in shares of 1.16% 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)
2026-05-01 2026-03-31 13F Fastenal COM 311900104 123,196 1,414 1.16 5,716 16.96 0.4623
2026-01-30 2025-12-31 13F Fastenal COM 311900104 121,782 -1,050 -0.85 4,887 -18.86 0.3312
2025-10-27 2025-09-30 13F Fastenal COM 311900104 122,832 5,702 4.87 6,024 22.44 0.3922
2025-07-22 2025-06-30 13F Fastenal COM 311900104 117,130 61,353 110.00 4,919 13.73 0.3245
2025-04-22 2025-03-31 13F Fastenal COM 311900104 55,777 2,401 4.50 4,326 12.69 0.3058
2025-01-24 2024-12-31 13F Fastenal COM 311900104 53,376 -1,170 -2.14 3,838 -9.18 0.2464
2024-10-23 2024-09-30 13F Fastenal COM 311900104 54,546 1,861 3.53 4,226 27.67 0.2384
2024-07-10 2024-06-30 13F Fastenal COM 311900104 52,685 -1,290 -2.39 3,311 -20.49 0.1873
2024-04-18 2024-03-31 13F Fastenal COM 311900104 53,975 -69,586 -56.32 4,164 -47.98 0.2335
2024-01-24 2023-12-31 13F Fastenal COM 311900104 123,561 -48,676 -28.26 8,003 -14.96 0.4462
2023-10-11 2023-09-30 13F Fastenal COM 311900104 172,237 14,062 8.89 9,411 0.87 0.5481
2023-07-14 2023-06-30 13F Fastenal COM 311900104 158,175 -11,244 -6.64 9,331 2.10 0.5129
2023-04-05 2023-03-31 13F Fastenal COM 311900104 169,419 -2,160 -1.26 9,138 114,125.00 0.5339
2023-01-11 2022-12-31 13F Fastenal COM 311900104 171,579 -56,200 -24.67 8 -99.92 0.4499
2022-10-19 2022-09-30 13F Fastenal COM 311900104 227,779 -52 -0.02 10,487 -7.79 0.6623
2022-07-08 2022-06-30 13F Fastenal COM 311900104 227,831 5,189 2.33 11,373 -14.00 0.6953
2022-04-21 2022-03-31 13F Fastenal COM 311900104 222,642 83,337 59.82 13,225 48.20 0.6939
2022-01-07 2021-12-31 13F Fastenal COM 311900104 139,305 -117,808 -45.82 8,924 -32.75 0.4543
2021-10-08 2021-09-30 13F Fastenal COM 311900104 257,113 113,163 78.61 13,270 77.29 0.7331
2021-07-07 2021-06-30 13F Fastenal COM 311900104 143,950 22,950 18.97 7,485 23.03 0.4192
2021-04-20 2021-03-31 13F Fastenal COM 311900104 121,000 -800 -0.66 6,084 2.30 0.3501
2021-01-14 2020-12-31 13F Fastenal COM 311900104 121,800 300 0.25 5,947 8.56 0.3567
2020-10-09 2020-09-30 13F Fastenal COM 311900104 121,500 110,500 1,004.55 5,478 1,063.06 0.3532
2020-07-07 2020-06-30 13F Fastenal COM 311900104 11,000 1,100 11.11 471 52.43 0.0330
2020-04-01 2020-03-31 13F Fastenal COM 311900104 9,900 -800 -7.48 309 -21.77 0.0253
2020-01-15 2019-12-31 13F Fastenal COM 311900104 10,700 2,500 30.49 395 47.39 0.0264
2019-10-01 2019-09-30 13F Fastenal COM 311900104 8,200 1,900 30.16 268 30.73 0.0191
2019-07-16 2019-06-30 13F Fastenal COM 311900104 6,300 -92,550 -93.63 205 -96.78 0.0149
2019-04-30 2019-03-31 13F Fastenal COM 311900104 98,850 -450 -0.45 6,357 22.44 0.4775
2019-01-11 2018-12-31 13F Fastenal COM 311900104 99,300 -4,000 -3.87 5,192 -13.37 0.4288
2018-10-19 2018-09-30 13F Fastenal COM 311900104 103,300 -3,450 -3.23 5,993 16.64 0.4338
2018-07-09 2018-06-30 13F Fastenal COM 311900104 106,750 -6,300 -5.57 5,138 -16.74 0.3931
2018-04-26 2018-03-31 13F Fastenal COM 311900104 113,050 -2,951 -2.54 6,171 -2.73 0.4675
2018-01-17 2017-12-31 13F Fastenal COM 311900104 116,001 1,050 0.91 6,344 21.09 0.4659
2017-10-16 2017-09-30 13F Fastenal COM 311900104 114,951 3,600 3.23 5,239 8.09 0.4035
2017-07-12 2017-06-30 13F Fastenal COM 311900104 111,351 58,300 109.89 4,847 77.42 0.3774
2017-04-17 2017-03-31 13F Fastenal COM 311900104 53,051 875 1.68 2,732 11.46 0.2227
2017-01-30 2016-12-31 13F Fastenal COM 311900104 52,176 -5,924 -10.20 2,451 0.99 0.2088
2016-10-03 2016-09-30 13F Fastenal COM 311900104 58,100 26,300 82.70 2,427 71.88 0.2075
2016-07-01 2016-06-30 13F Fastenal COM 311900104 31,800 10,100 46.54 1,412 32.83 0.1148
2016-05-20 2016-03-31 13F Fastenal COM 311900104 21,700 -7,600 -25.94 1,063 -11.12 0.0908
2016-01-12 2015-12-31 13F Fastenal COM 311900104 29,300 -83,640 -74.06 1,196 -71.08 0.1041
2015-10-05 2015-09-30 13F Fastenal COM 311900104 112,940 11,540 11.38 4,135 -3.32 0.3777
2015-07-06 2015-06-30 13F Fastenal COM 311900104 101,400 16,300 19.15 4,277 21.30 0.3527
2015-04-14 2015-03-31 13F Fastenal COM 311900104 85,100 85,100 3,526 0.2736
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.