Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionRathbone Brothers plc
Latest Disclosed Ownership978,041 shares
Latest Disclosed Value $ 468,675,487
Rathbone Brothers plc reports 1.40% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 12, 2026 - Rathbone Brothers plc filed a 13F-HR form disclosing ownership of 978,041 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $468,675,487 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 6, 2026 disclosing 991,887 shares of Berkshire Hathaway Inc.. This represents a change in shares of -1.40% 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 USD0.0033 Cls B Com Stk COM 084670702 978,041 -13,846 -1.40 468,675 -6.00 2.0025
2026-02-06 2025-12-31 13F/A-1 BERKSHIRE HATHAWAY INC USD0.0033 Cls B Com Stk COM 084670702 991,887 10,471 1.07 498,570 1.05 1.9736
2026-01-21 2025-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B Com Stk COM 084670702 991,887 10,471 498,570 1.9736
2025-11-13 2025-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B Com Stk COM 084670702 981,416 -71,547 -6.79 493,396 -3.54 2.0034
2025-08-07 2025-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 1,052,963 15,315 1.48 511,497 -7.44 2.2060
2025-05-13 2025-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 1,037,648 35,216 3.51 552,630 21.62 2.6705
2025-02-13 2024-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 1,002,432 50,055 5.26 454,380 3.66 2.1997
2024-11-13 2024-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 952,377 25,495 2.75 438,341 16.25 2.2119
2024-08-09 2024-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 926,882 7,500 0.82 377,056 -2.47 2.0537
2024-05-14 2024-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 919,382 -4,341 -0.47 386,619 17.35 2.2312
2024-02-13 2023-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 923,723 23,308 2.59 329,455 4.45 2.1232
2023-11-13 2023-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 900,415 154,988 20.79 315,417 24.09 2.2874
2023-08-04 2023-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 745,427 9,409 1.28 254,191 11.85 2.3722
2023-05-12 2023-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 736,018 33,862 4.82 227,260 4.78 2.3236
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 702,156 17,491 2.55 216,896 18.64 2.4422
2022-11-14 2022-09-30 13F/A-1 BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 684,665 20,070 3.02 182,819 0.76 2.2556
2022-11-03 2022-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 684,665 20,070 182,819 2.2556
2022-08-12 2022-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 664,595 65,040 10.85 181,448 -14.25 2.0800
2022-05-11 2022-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 599,555 104,630 21.14 211,589 42.98 2.1588
2022-02-10 2021-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 494,925 -557 -0.11 147,983 9.42 1.4381
2021-11-04 2021-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 495,482 23,530 4.99 135,237 3.10 1.4550
2021-07-30 2021-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 471,952 43,493 10.15 131,165 19.83 1.4571
2021-05-14 2021-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 428,459 67,800 18.80 109,458 30.89 1.4016
2021-02-11 2020-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 360,659 29,559 8.93 83,626 18.61 1.1873
2020-11-13 2020-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 331,100 113,848 52.40 70,504 81.80 1.2064
2020-08-07 2020-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 217,252 48,796 28.97 38,782 25.92 0.7873
2020-05-04 2020-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 168,456 8,342 5.21 30,799 -15.07 0.8970
2020-02-11 2019-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 160,114 3,052 1.94 36,266 11.00 0.9547
2019-11-13 2019-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 157,062 7,037 4.69 32,672 2.16 0.9279
2019-08-12 2019-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 150,025 -6,166 -3.95 31,981 1.92 1.0013
2019-05-09 2019-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 156,191 -63 -0.04 31,377 -1.65 1.0317
2019-02-12 2018-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 156,254 -2,282 -1.44 31,904 -6.01 1.2227
2018-10-12 2018-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 158,536 10,100 6.80 33,944 22.51 1.1531
2018-07-16 2018-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 148,436 389 0.26 27,706 -6.18 1.0497
2018-04-06 2018-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 148,047 -6,044 -3.92 29,532 -3.31 1.2018
2018-01-24 2017-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 154,091 810 0.53 30,544 8.70 1.2432
2017-10-24 2017-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 153,281 -1,773 -1.14 28,099 7.00 1.2233
2017-08-10 2017-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 155,054 -5,437 -3.39 26,261 -1.83 1.1701
2017-04-06 2017-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 160,491 -2,749 -1.68 26,751 0.55 1.2195
2017-02-02 2016-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 163,240 2,595 1.62 26,605 14.64 1.3334
2016-10-24 2016-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 160,645 -7,044 -4.20 23,208 -4.42 1.1987
2016-08-03 2016-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 167,689 -1,486 -0.88 24,280 1.15 1.3379
2016-04-08 2016-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 169,175 -1,060 -0.62 24,003 10.10 1.4595
2016-01-19 2015-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 170,235 -764 -0.45 21,802 -2.22 1.3843
2015-10-27 2015-09-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 170,999 2,669 1.59 22,298 -2.68 1.4861
2015-08-05 2015-06-30 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 168,330 5,183 3.18 22,911 -2.69 1.4878
2015-04-10 2015-03-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 163,147 241 0.15 23,545 -3.74 1.5578
2015-01-21 2014-12-31 13F BERKSHIRE HATHAWAY INC USD0.0033 Cls B COM 084670702 162,906 5,484 3.48 24,460 12.48 1.6083
2014-10-23 2014-09-30 13F BERKSHIRE HATHAWAY INC US$0.0033 Cls B COM 084670702 157,422 782 0.50 21,746 9.70 1.5104
2014-07-02 2014-06-30 13F BERKSHIRE HATHAWAY INC US$0.0033 Cls B COM 084670702 156,640 80 0.05 19,824 1.32 1.4008
2014-04-11 2014-03-31 13F/A-1 BERKSHIRE HATHAWAY INC US$0.0033 Cls B COM 084670702 156,560 5,663 3.75 19,565 9.36 1.5696
2014-04-10 2014-03-31 13F CELGENE CORP US$0.01 COM 084670702 13,222 1,846
2014-01-10 2013-12-31 13F BERKSHIRE HATHAWAY INC US$0.0033 Cls B COM 084670702 150,897 -1,840 -1.20 17,890 3.19 1.7848
2013-10-11 2013-09-30 13F BERKSHIRE HATHAWAY INC Class B COM 084670702 152,737 3,200 2.14 17,337 3.59 2.0197
2013-08-06 2013-06-30 13F BERKSHIRE HATHAWAY INC Class B COM 084670702 149,537 149,537 16,736 2.2540
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.