Fastenal Company
MX ˙ BMV ˙ US3119001044
SecurityMX:FAST / Fastenal Company
InstitutionAssetmark, Inc
Latest Disclosed Ownership30,039 shares
Latest Disclosed Value $ 1,393,787
Assetmark, Inc reports 19.06% increase in ownership of FAST / Fastenal Company

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 30,039 shares of Fastenal Company (MX:FAST) valued at $1,393,787 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 25,231 shares of Fastenal Company. This represents a change in shares of 19.06% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-06 2026-03-31 13F FASTENAL COM 311900104 30,039 4,808 19.06 1,394 37.65 0.0028
2026-01-23 2025-12-31 13F FASTENAL COM 311900104 25,231 4,574 22.14 1,013 -0.10 0.0021
2025-11-06 2025-09-30 13F FASTENAL COM 311900104 20,657 4,762 29.96 1,013 51.87 0.0022
2025-08-04 2025-06-30 13F FASTENAL COM 311900104 15,895 10,084 173.53 668 48.22 0.0016
2025-05-06 2025-03-31 13F FASTENAL COM 311900104 5,811 774 15.37 451 24.31 0.0012
2025-02-06 2024-12-31 13F FASTENAL COM 311900104 5,037 730 16.95 362 17.92 0.0010
2024-11-01 2024-09-30 13F FASTENAL COM 311900104 4,307 731 20.44 308 37.05 0.0009
2024-08-13 2024-06-30 13F FASTENAL COM 311900104 3,576 133 3.86 225 -15.47 0.0007
2024-05-07 2024-03-31 13F FASTENAL COM 311900104 3,443 792 29.88 266 54.97 0.0009
2024-02-09 2023-12-31 13F FASTENAL COM 311900104 2,651 700 35.88 172 61.32 0.0006
2023-10-27 2023-09-30 13F FASTENAL COM 311900104 1,951 347 21.63 107 12.77 0.0004
2023-08-11 2023-06-30 13F FASTENAL CO COM COM 311900104 1,604 659 69.74 95 88.00 0.0004
2023-05-05 2023-03-31 13F FASTENAL CO COM COM 311900104 945 11 1.18 51 13.64 0.0002
2023-02-10 2022-12-31 13F FASTENAL COM 311900104 934 -77 -7.62 44 -6.38 0.0002
2022-11-01 2022-09-30 13F FASTENAL COM 311900104 1,011 88 9.53 47 2.17 0.0002
2022-08-03 2022-06-30 13F FASTENAL CO COM COM 311900104 923 144 18.49 46 0.00 0.0002
2022-05-13 2022-03-31 13F FASTENAL CO COM COM 311900104 779 494 173.33 46 155.56 0.0002
2022-02-14 2021-12-31 13F FASTENAL CO COM COM 311900104 285 256 882.76 18 1,700.00 0.0001
2021-11-12 2021-09-30 13F FASTENAL CO COM COM 311900104 29 10 52.63 1 0.00 0.0000
2021-08-16 2021-06-30 13F FASTENAL CO COM COM 311900104 19 -10 -34.48 1 0.00 0.0000
2021-05-14 2021-03-31 13F FASTENAL COM 311900104 29 -3,374 -99.15 1 -99.40 0.0000
2021-02-10 2020-12-31 13F FASTENAL CO COM COM 311900104 3,403 278 8.90 166 17.73 0.0009
2020-11-13 2020-09-30 13F FASTENAL CO COM COM 311900104 3,125 716 29.72 141 36.89 0.0009
2020-08-11 2020-06-30 13F FASTENAL CO COM COM 311900104 2,409 2,318 2,547.25 103 3,333.33 0.0007
2020-05-12 2020-03-31 13F FASTENAL CO COM COM 311900104 91 -38 -29.46 3 -40.00 0.0000
2020-02-11 2019-12-31 13F FASTENAL CO COM COM 311900104 129 30 30.30 5 66.67 0.0000
2019-11-13 2019-09-30 13F FASTENAL CO COM COM 311900104 99 51 106.25 3 50.00 0.0000
2019-08-14 2019-06-30 13F FASTENAL CO COM COM 311900104 48 -22 -31.43 2 -60.00 0.0000
2019-05-14 2019-03-31 13F FASTENAL CO COM COM 311900104 70 70 5 0.0000
2019-02-13 2018-12-31 13F FASTENAL CO COM COM 311900104 0 -183 -100.00 0 -100.00
2018-11-13 2018-09-30 13F FASTENAL CO COM COM 311900104 183 -31 -14.49 11 10.00 0.0001
2018-08-01 2018-06-30 13F FASTENAL CO COM COM 311900104 214 -61 -22.18 10 -33.33 0.0001
2018-05-16 2018-03-31 13F FASTENAL CO COM COM 311900104 275 -1,840 -87.00 15 -87.07 0.0002
2018-02-13 2017-12-31 13F FASTENAL CO COM COM 311900104 2,115 86 4.24 116 26.09 0.0012
2017-11-08 2017-09-30 13F FASTENAL CO COM COM 311900104 2,029 732 56.44 92 64.29 0.0010
2017-08-14 2017-06-30 13F FASTENAL CO COM COM 311900104 1,297 732 129.56 56 93.10 0.0007
2017-09-15 2017-03-31 13F/A-1 FASTENAL CO COM COM 311900104 565 0 0.00 29 7.41 0.0004
2017-05-08 2017-03-31 13F FASTENAL CO COM COM 311900104 565 0 29
2017-09-15 2016-12-31 13F/A-1 FASTENAL CO COM COM 311900104 565 565 27 0.0004
2017-02-14 2016-12-31 13F FASTENAL CO COM COM 311900104 565 27 0.0004
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.