Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionWashington Trust Bank
Latest Disclosed Ownership8,814 shares
Latest Disclosed Value $ 4,223,669
Washington Trust Bank reports 2.49% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 7, 2026 - Washington Trust Bank filed a 13F-HR form disclosing ownership of 8,814 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $4,223,669 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 9,039 shares of Berkshire Hathaway Inc.. This represents a change in shares of -2.49% 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)
2026-05-07 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,814 -225 -2.49 4,224 -7.04 0.2570
2026-02-04 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,039 31 0.34 4,543 0.33 0.3183
2025-10-24 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,008 37 0.41 4,529 3.92 0.3319
2025-08-06 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,971 -240 -2.61 4,358 -11.17 0.3670
2025-04-30 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,211 -762 -7.64 4,906 8.52 0.4914
2025-02-11 2024-12-31 13F Berkshire Hathaway CL B NEW 084670702 9,973 -207 -2.03 4,521 -3.52 0.4342
2024-10-31 2024-09-30 13F Berkshire Hathaway CL B NEW 084670702 10,180 221 2.22 4,685 15.65 0.4485
2024-07-29 2024-06-30 13F Berkshire Hathaway CL B NEW 084670702 9,959 -90 -0.90 4,051 -4.12 0.4007
2024-05-14 2024-03-31 13F Berkshire Hathaway CL B NEW 084670702 10,049 118 1.19 4,226 19.32 0.4028
2024-02-14 2023-12-31 13F Berkshire Hathaway CL B NEW 084670702 9,931 -351 -3.41 3,542 -1.67 0.3138
2023-11-06 2023-09-30 13F Berkshire Hathaway CL B NEW 084670702 10,282 9 0.09 3,602 2.80 0.3763
2023-08-10 2023-06-30 13F Berkshire Hathaway CL B NEW 084670702 10,273 10 0.10 3,503 10.57 0.3576
2023-05-15 2023-03-31 13F Berkshire Hathaway CL B NEW 084670702 10,263 63 0.62 3,169 105,500.00 0.3390
2023-02-06 2022-12-31 13F Berkshire Hathaway CL B NEW 084670702 10,200 -811 -7.37 3 -99.90 0.3573
2022-11-16 2022-09-30 13F Berkshire Hathaway CL B NEW 084670702 11,011 67 0.61 2,940 -1.61 0.3737
2022-08-04 2022-06-30 13F Berkshire Hathaway CL B NEW 084670702 10,944 -255 -2.28 2,988 -24.39 0.3837
2022-05-13 2022-03-31 13F Berkshire Hathaway CL B NEW 084670702 11,199 -135 -1.19 3,952 16.61 0.4572
2022-02-09 2021-12-31 13F Berkshire Hathaway CL B NEW 084670702 11,334 -192 -1.67 3,389 7.72 0.3278
2021-10-27 2021-09-30 13F Berkshire Hathaway CL B NEW 084670702 11,526 -290 -2.45 3,146 -4.20 0.3675
2021-07-28 2021-06-30 13F Berkshire Hathaway CL B NEW 084670702 11,816 -7 -0.06 3,284 8.71 0.3891
2021-04-22 2021-03-31 13F Berkshire Hathaway CL B NEW 084670702 11,823 -417 -3.41 3,021 6.45 0.3722
2021-02-08 2020-12-31 13F Berkshire Hathaway CL B NEW 084670702 12,240 300 2.51 2,838 11.64 0.3702
2020-11-12 2020-09-30 13F Berkshire Hathaway CL B NEW 084670702 11,940 -75 -0.62 2,542 18.56 0.3761
2020-07-29 2020-06-30 13F Berkshire Hathaway CL B NEW 084670702 12,015 -1,871 -13.47 2,144 -15.52 0.3410
2020-05-01 2020-03-31 13F Berkshire Hathaway CL B NEW 084670702 13,886 3,083 28.54 2,538 3.72 0.4869
2020-01-29 2019-12-31 13F Berkshire Hathaway CL B NEW 084670702 10,803 -20 -0.18 2,447 8.71 0.3480
2019-10-29 2019-09-30 13F Berkshire Hathaway CL B NEW 084670702 10,823 -185 -1.68 2,251 -4.09 0.3683
2019-07-26 2019-06-30 13F Berkshire Hathaway CL B NEW 084670702 11,008 132 1.21 2,347 7.41 0.3817
2019-04-09 2019-03-31 13F Berkshire Hathaway CL B NEW 084670702 10,876 115 1.07 2,185 -0.59 0.3483
2019-02-13 2018-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 10,761 -2 -0.02 2,198 -4.60 0.2886
2018-11-14 2018-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 10,763 -415 -3.71 2,304 10.40 0.3422
2018-07-03 2018-06-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 11,178 7,025 169.15 2,087 151.75 0.2906
2018-04-03 2018-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 4,153 -586 -12.37 829 -11.71 0.1189
2018-01-03 2017-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 4,739 -200 -4.05 939 3.64 0.1373
2017-10-05 2017-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 4,939 734 17.46 906 27.25 0.1437
2017-07-20 2017-06-30 13F Berkshire Hathaway CL B NEW 084670702 4,205 -884 -17.37 712 -16.04 0.1527
2017-04-18 2017-03-31 13F Berkshire Hathaway CL B NEW 084670702 5,089 61 1.21 848 3.54 0.1830
2017-01-17 2016-12-31 13F Berkshire Hathaway CL B NEW 084670702 5,028 -98 -1.91 819 10.53 0.1846
2016-10-04 2016-09-30 13F Berkshire Hathaway CL B NEW 084670702 5,126 -16 -0.31 741 -0.54 0.1782
2016-07-07 2016-06-30 13F Berkshire Hathaway CL B NEW 084670702 5,142 738 16.76 745 19.20 0.1929
2016-04-25 2016-03-31 13F Berkshire Hathaway CL B NEW 084670702 4,404 -106 -2.35 625 4.87 0.1615
2016-01-21 2015-12-31 13F Berkshire Hathaway CL B NEW 084670702 4,510 -274 -5.73 596 -4.49 0.1298
2015-10-07 2015-09-30 13F Berkshire Hathaway Common Stock 084670702 4,784 704 17.25 624 12.43 0.1658
2015-07-10 2015-06-30 13F Berkshire Hathaway Common Stock 084670702 4,080 59 1.47 555 -4.31 0.1354
2015-04-17 2015-03-31 13F Berkshire Hathaway Common Stock 084670702 4,021 -798 -16.56 580 -19.89 0.1398
2015-01-15 2014-12-31 13F Berkshire Hathaway Common Stock 084670702 4,819 388 8.76 724 18.30 0.1890
2014-11-21 2014-09-30 13F Berkshire Hathaway Common Stock 084670702 4,431 -210 -4.52 612 4.26 0.1920
2014-08-08 2014-06-30 13F Berkshire Hathaway Common Stock 084670702 4,641 0 0.00 587 1.21 0.1193
2014-05-15 2014-03-31 13F Berkshire Hathaway Common Stock 084670702 4,641 4,641 580 0.1225
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.