Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionHarfst & Associates, Inc.
Latest Disclosed Ownership8,913 shares
Latest Disclosed Value $ 4,271,110
Harfst & Associates, Inc. reports 0.56% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 12, 2026 - Harfst & Associates, Inc. filed a 13F-HR form disclosing ownership of 8,913 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $4,271,110 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 8,863 shares of Berkshire Hathaway Inc.. This represents a change in shares of 0.56% 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 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,913 50 0.56 4,271 -4.11 0.7624
2026-02-10 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,863 -201 -2.22 4,455 -2.24 0.8033
2025-10-23 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,064 444 5.15 4,557 8.81 0.8404
2025-08-13 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,620 -629 -6.80 4,187 -14.98 0.8635
2025-05-13 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,249 -1,794 -16.25 4,926 -1.60 1.1385
2025-02-05 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,043 -67 -0.60 5,006 -2.11 1.0428
2024-10-18 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,110 229 2.10 5,113 15.52 1.1486
2024-08-01 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,881 -1,011 -8.50 4,426 -11.48 1.0317
2024-08-01 2024-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,892 838 7.58 5,001 26.84 1.1874
2024-02-07 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,054 -165 -1.47 3,943 0.31 1.0407
2023-11-07 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,219 -18 -0.16 3,930 2.58 1.1030
2023-08-07 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,237 971 9.46 3,832 20.89 1.0200
2023-05-10 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,266 16 0.16 3,170 0.09 0.9091
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,250 26 0.25 3,166 15.97 0.9132
2022-10-28 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,224 454 4.65 2,730 2.36 0.8210
2022-07-28 2022-06-30 13F BERKSHIRE HATHAWAY CLS B CL B NEW 084670702 9,770 -252 -2.51 2,667 -24.58 0.7572
2022-04-28 2022-03-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 10,022 679 7.27 3,536 26.60 0.8214
2022-02-07 2021-12-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 9,343 160 1.74 2,793 11.45 0.7108
2021-10-28 2021-09-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 9,183 574 6.67 2,506 4.77 0.6925
2021-08-11 2021-06-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 8,609 67 0.78 2,392 9.62 0.6930
2021-05-10 2021-03-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 8,542 405 4.98 2,182 15.69 0.6574
2021-01-25 2020-12-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 8,137 58 0.72 1,886 9.65 0.6932
2020-11-04 2020-09-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 8,079 76 0.95 1,720 20.45 0.7280
2020-08-07 2020-06-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 8,003 3,246 68.24 1,428 64.33 0.6138
2020-05-05 2020-03-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 4,757 -44 -0.92 869 -20.06 0.4418
2020-02-14 2019-12-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 4,801 0 0.00 1,087 8.92 0.4185
2019-11-14 2019-09-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 4,801 -384 -7.41 998 -9.68 0.4109
2019-08-14 2019-06-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,185 -200 -3.71 1,105 2.22 0.4513
2019-05-01 2019-03-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,385 -50 -0.92 1,081 -2.52 0.4625
2019-02-06 2018-12-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,435 20 0.37 1,109 -4.31 0.5304
2018-10-31 2018-09-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,415 0 0.00 1,159 14.75 0.4953
2018-08-10 2018-06-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,415 -60 -1.10 1,010 -7.51 0.4268
2018-05-04 2018-03-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,475 0 0.00 1,092 0.65 0.4456
2018-02-09 2017-12-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,475 0 0.00 1,085 8.18 0.4393
2017-11-07 2017-09-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,475 0 0.00 1,003 8.20 0.4176
2017-08-11 2017-06-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,475 0 0.00 927 1.64 0.3741
2017-05-12 2017-03-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,475 55 1.01 912 3.28 0.3941
2017-02-02 2016-12-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,420 0 0.00 883 12.77 0.4413
2016-11-14 2016-09-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,420 84 1.57 783 1.42 0.4127
2016-08-05 2016-06-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,336 179 3.47 772 5.61 0.3115
2016-05-03 2016-03-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 5,157 -1,385 -21.17 731 -15.30 0.4748
2016-02-05 2015-12-31 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 6,542 0 0.00 863 1.17 0.3514
2015-11-09 2015-09-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 6,542 -119 -1.79 853 -5.95 0.3740
2015-08-06 2015-06-30 13F BERKSHIRE HATHAWAYINCORPORATED DEL CLASS B CL B NEW 084670702 6,661 6,661 907 0.5092
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.