Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionWeik Capital Management
Latest Disclosed Ownership41,129 shares
Latest Disclosed Value $ 19,709,017
Weik Capital Management reports 1.43% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 12, 2026 - Weik Capital Management filed a 13F-HR form disclosing ownership of 41,129 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $19,709,017 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 41,724 shares of Berkshire Hathaway Inc.. This represents a change in shares of -1.43% 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 B COM 084670702 41,129 -595 -1.43 19,709 -6.02 7.8438
2026-02-11 2025-12-31 13F Berkshire Hathaway B COM 084670702 41,724 355 0.86 20,973 0.84 7.8575
2026-02-11 2025-12-31 13F Berkshire Hathaway B COM 084670702 41,724 20,973
2025-11-12 2025-09-30 13F Berkshire Hathaway B COM 084670702 41,369 -559 -1.33 20,798 2.11 7.7607
2025-08-12 2025-06-30 13F Berkshire Hathaway B COM 084670702 41,928 -415 -0.98 20,367 -9.68 8.0594
2025-05-13 2025-03-31 13F Berkshire Hathaway B COM 084670702 42,343 -2,151 -4.83 22,551 11.82 9.1772
2025-02-12 2024-12-31 13F Berkshire Hathaway B COM 084670702 44,494 1,118 2.58 20,168 1.02 8.2037
2024-11-13 2024-09-30 13F Berkshire Hathaway B COM 084670702 43,376 -2,299 -5.03 19,964 7.45 8.0584
2024-08-09 2024-06-30 13F Berkshire Hathaway B COM 084670702 45,675 -1,275 -2.72 18,581 -5.89 7.9468
2024-05-14 2024-03-31 13F Berkshire Hathaway B COM 084670702 46,950 -506 -1.07 19,743 16.65 8.3868
2024-02-13 2023-12-31 13F Berkshire Hathaway B COM 084670702 47,456 -990 -2.04 16,926 -0.27 7.8260
2023-11-13 2023-09-30 13F Berkshire Hathaway B COM 084670702 48,446 -896 -1.82 16,971 0.86 8.3480
2023-08-14 2023-06-30 13F Berkshire Hathaway B COM 084670702 49,342 -487 -0.98 16,826 112,066.67 7.9476
2023-05-15 2023-03-31 13F Berkshire Hathaway B COM 084670702 49,829 -1,214 -2.38 15 0.00 7.0387
2023-02-10 2022-12-31 13F Berkshire Hathaway B COM 084670702 51,043 -165 -0.32 16 -99.89 7.3665
2022-11-14 2022-09-30 13F Berkshire Hathaway B COM 084670702 51,208 -592 -1.14 13,674 -3.31 6.8220
2022-08-12 2022-06-30 13F Berkshire Hathaway B COM 084670702 51,800 -107 -0.21 14,142 -22.80 6.4440
2022-05-13 2022-03-31 13F Berkshire Hathaway B COM 084670702 51,907 -108 -0.21 18,318 17.79 7.2237
2022-02-14 2021-12-31 13F Berkshire Hathaway B COM 084670702 52,015 -1,315 -2.47 15,552 6.84 5.8929
2021-11-12 2021-09-30 13F Berkshire Hathaway B COM 084670702 53,330 -2,170 -3.91 14,556 -5.63 6.0119
2021-08-11 2021-06-30 13F Berkshire Hathaway B COM 084670702 55,500 615 1.12 15,425 10.01 6.0073
2021-05-12 2021-03-31 13F Berkshire Hathaway B COM 084670702 54,885 -630 -1.13 14,021 8.93 5.9421
2021-02-12 2020-12-31 13F Berkshire Hathaway B COM 084670702 55,515 -610 -1.09 12,872 7.71 5.7668
2020-11-12 2020-09-30 13F Berkshire Hathaway B COM 084670702 56,125 -830 -1.46 11,951 17.55 5.8353
2020-08-13 2020-06-30 13F Berkshire Hathaway B COM 084670702 56,955 -1,122 -1.93 10,167 -4.25 5.4871
2020-05-13 2020-03-31 13F Berkshire Hathaway B COM 084670702 58,077 -363 -0.62 10,618 -19.79 6.0540
2020-02-14 2019-12-31 13F Berkshire Hathaway B COM 084670702 58,440 -820 -1.38 13,237 7.38 5.9773
2019-11-12 2019-09-30 13F Berkshire Hathaway B COM 084670702 59,260 -830 -1.38 12,327 -3.76 5.9114
2019-08-09 2019-06-30 13F Berkshire Hathaway B COM 084670702 60,090 -951 -1.56 12,809 4.45 6.1418
2019-05-09 2019-03-31 13F Berkshire Hathaway B COM 084670702 61,041 -650 -1.05 12,263 -2.64 5.9825
2019-02-12 2018-12-31 13F Berkshire Hathaway B COM 084670702 61,691 -865 -1.38 12,596 -5.96 6.8606
2018-11-13 2018-09-30 13F Berkshire Hathaway B COM 084670702 62,556 -2,720 -4.17 13,394 9.93 6.4248
2018-08-03 2018-06-30 13F Berkshire Hathaway B COM 084670702 65,276 -2,905 -4.26 12,184 -10.42 5.9909
2018-05-11 2018-03-31 13F Berkshire Hathaway B COM 084670702 68,181 -1,815 -2.59 13,601 -1.97 6.5469
2018-02-12 2017-12-31 13F Berkshire Hathaway B COM 084670702 69,996 -880 -1.24 13,875 6.79 6.4800
2017-11-13 2017-09-30 13F Berkshire Hathaway B COM 084670702 70,876 -780 -1.09 12,993 7.06 6.1851
2017-08-14 2017-06-30 13F Berkshire Hathaway B COM 084670702 71,656 1,621 2.31 12,136 3.97 6.3926
2017-05-09 2017-03-31 13F Berkshire Hathaway B COM 084670702 70,035 -1,680 -2.34 11,673 -0.13 6.2046
2017-02-09 2016-12-31 13F Berkshire Hathaway B COM 084670702 71,715 -2,200 -2.98 11,688 9.45 6.5439
2016-11-10 2016-09-30 13F Berkshire Hathaway B COM 084670702 73,915 -440 -0.59 10,679 -0.81 6.1416
2016-08-11 2016-06-30 13F Berkshire Hathaway B COM 084670702 74,355 -394 -0.53 10,766 1.52 6.4340
2016-05-13 2016-03-31 13F Berkshire Hathaway B COM 084670702 74,749 -3,600 -4.59 10,605 2.51 6.3839
2016-02-12 2015-12-31 13F Berkshire Hathaway B COM 084670702 78,349 -740 -0.94 10,345 0.31 6.2312
2015-11-12 2015-09-30 13F Berkshire Hathaway B COM 084670702 79,089 -2,585 -3.17 10,313 -7.23 6.2873
2015-08-13 2015-06-30 13F Berkshire Hathaway B COM 084670702 81,674 150 0.18 11,117 -5.52 6.4218
2015-05-14 2015-03-31 13F Berkshire Hathaway B COM 084670702 81,524 -500 -0.61 11,766 -4.47 6.8161
2015-02-10 2014-12-31 13F Berkshire Hathaway B COM 084670702 82,024 -1,100 -1.32 12,316 7.25 7.1516
2014-11-12 2014-09-30 13F Berkshire Hathaway B COM 084670702 83,124 -1,500 -1.77 11,483 7.22 7.0599
2014-08-12 2014-06-30 13F Berkshire Hathaway B COM 084670702 84,624 -285 -0.34 10,710 0.93 6.5629
2014-05-15 2014-03-31 13F Berkshire Hathaway B COM 084670702 84,909 -1,505 -1.74 10,611 3.57 6.6855
2014-02-12 2013-12-31 13F Berkshire Hathaway B COM 084670702 86,414 -135 -0.16 10,245 4.29 6.3090
2013-11-12 2013-09-30 13F Berkshire Hathaway B COM 084670702 86,549 -1,190 -1.36 9,824 0.04 6.5906
2013-08-14 2013-06-30 13F Berkshire Hathaway B COM 084670702 87,739 87,739 9,820 6.9008
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.