Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionRossmore Private Capital
Latest Disclosed Ownership13,186 shares
Latest Disclosed Value $ 6,318,624
Rossmore Private Capital reports 0.98% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 1, 2026 - Rossmore Private Capital filed a 13F-HR form disclosing ownership of 13,186 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $6,318,624 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 16 shares of Berkshire Hathaway Inc.. This represents a change in shares of -0.98% 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 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,186 -130 -0.98 6,319 -5.60 0.5544
2026-02-05 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,316 2,730 25.79 6,693 25.78 0.5961
2025-10-30 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,586 0 0.00 5,322 3.48 0.5734
2025-08-07 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,586 0 0.00 5,142 -8.78 0.6003
2025-05-13 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,586 203 1.96 5,638 19.78 0.6940
2025-02-13 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,383 89 0.86 4,706 -0.65 0.5818
2024-11-05 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,294 0 0.00 4,738 13.14 0.5854
2024-08-12 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,294 -158 -1.51 4,188 -4.73 0.5499
2024-05-13 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,452 158 1.53 4,395 19.72 0.5751
2024-02-07 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,294 0 0.00 3,671 1.83 0.5187
2023-11-13 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,294 35 0.34 3,606 3.06 0.5462
2023-08-14 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,259 41 0.40 3,498 10.87 0.5204
2023-05-02 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,218 250 2.51 3,155 2.47 0.4929
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,968 178 1.82 3,079 153,850.00 0.4930
2022-11-08 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,790 118 1.22 3 0.00 0.4678
2022-08-11 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,672 940 10.77 3 -33.33 0.4553
2022-05-09 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,732 1,037 13.48 3 50.00 0.4799
2022-02-07 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,695 -140 -1.79 2 0.00 0.3593
2021-11-08 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,835 90 1.16 2 0.00 0.3661
2021-08-13 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,745 439 6.01 2 100.00 0.3682
2021-05-10 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,306 0 0.00 2 0.00 0.3498
2021-02-10 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,306 -275 -3.63 2 0.00 0.3434
2020-11-10 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,581 -820 -9.76 2 -99.93 0.3793
2020-08-05 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,401 626 8.05 1,500 5.49 0.4143
2020-05-07 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,775 -530 -6.38 1,422 -24.40 0.4916
2020-02-10 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,305 0 0.00 1,881 8.85 0.5803
2019-11-05 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,305 1,454 21.22 1,728 18.36 0.5811
2019-08-05 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,851 -15 -0.22 1,460 5.87 0.5157
2019-04-30 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,866 -42 -0.61 1,379 -2.20 0.5078
2019-01-22 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,908 200 2.98 1,410 -1.81 0.5976
2018-10-26 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,708 371 5.85 1,436 21.39 0.5742
2018-07-20 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,337 715 12.72 1,183 5.53 0.7636
2018-05-04 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,622 1,118 24.82 1,121 25.67 1.1347
2018-03-15 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B CL B NEW 084670702 4,504 4,504 893 0.8995
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.