Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionRMR Wealth Builders
Latest Disclosed Ownership13,855 shares
Latest Disclosed Value $ 6,639,131
RMR Wealth Builders reports 4.78% increase in ownership of BRKB / Berkshire Hathaway Inc.

On April 22, 2026 - RMR Wealth Builders filed a 13F-HR form disclosing ownership of 13,855 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $6,639,131 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 1 shares of Berkshire Hathaway Inc.. This represents a change in shares of 4.78% 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)
2026-04-22 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,855 632 4.78 6,639 -0.11 0.5228
2026-01-29 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,223 379 2.95 6,647 2.93 0.5318
2025-11-05 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,844 1,318 11.44 6,457 15.32 0.5404
2025-07-08 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,526 3,699 47.26 5,599 34.33 0.5089
2025-04-16 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,827 60 0.77 4,168 18.41 0.4387
2025-01-14 2024-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,767 -359 -4.42 3,521 -5.88 0.3639
2025-01-10 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,767 -359 3,521 0.3661
2024-10-21 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,126 -141 -1.71 3,740 11.24 0.3963
2024-07-23 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,267 -67 -0.80 3,363 -4.05 0.3859
2024-04-15 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,334 2,511 43.12 3,505 68.79 0.4238
2024-02-06 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,823 -346 -5.61 2,077 -3.93 0.2918
2023-10-23 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,169 1,751 39.63 2,161 43.49 0.3452
2023-07-21 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,418 0 0.00 1,507 10.41 0.2563
2023-04-11 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,418 1,518 52.34 1,364 52.40 0.2594
2023-02-15 2022-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,900 7 0.24 896 15.93 0.2031
2022-11-08 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,893 -42 -1.43 772 -3.62 0.1888
2022-08-02 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,935 18 0.62 801 -22.16 0.1996
2022-05-13 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,917 45 1.57 1,029 19.79 0.2207
2022-02-02 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,872 0 0.00 859 9.57 0.2467
2021-10-18 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,872 -800 -21.79 784 -23.21 0.2302
2021-08-16 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Common Stock 084670702 3,672 335 10.04 1,021 19.70 0.3347
2021-05-13 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,337 380 12.85 853 24.34 0.2216
2021-02-26 2020-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,957 -605 -16.98 686 -9.50 0.3370
2021-02-09 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,540 -1,022 686 375,526.2020
2020-11-13 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,562 3,177 825.19 758 998.55 0.1968
2020-08-19 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 385 285 285.00 69 200.00 0.0615
2020-03-03 2019-12-31 13F BERKSHIRE HATHAWAY INC COM USD0.0033 CLASS B CL B NEW 084670702 100 100 23 0.0222
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.