Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionWealth Architects, LLC
Latest Disclosed Ownership21,250 shares
Latest Disclosed Value $ 10,183,000
Wealth Architects, LLC reports 13.27% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 15, 2026 - Wealth Architects, LLC filed a 13F-HR form disclosing ownership of 21,250 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $10,183,000 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 24,500 shares of Berkshire Hathaway Inc.. This represents a change in shares of -13.27% 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)
2026-05-15 2026-03-31 13F BERKSHIRE HATHAWAY INCDEL CL B Equities 084670702 21,250 -3,250 -13.27 10,183 -17.31 0.9077
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,500 -809 -3.20 12,315 -3.21 1.1096
2025-11-13 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,309 -913 -3.48 12,724 -0.11 1.2015
2025-07-25 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 26,222 -2,896 -9.95 12,738 -17.86 1.2940
2025-05-14 2025-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 29,118 2,502 9.40 15,508 28.54 1.7109
2025-05-12 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 184,592 157,976 11,727 1.2944
2025-02-10 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 26,616 170 0.64 12,064 -0.89 1.3618
2024-10-31 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 26,446 -70 -0.26 12,172 12.85 1.3775
2024-08-08 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 26,516 -9 -0.03 10,787 -3.30 1.3177
2024-05-13 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 26,525 -51 -0.19 11,154 17.68 1.4699
2024-02-14 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 26,576 5,106 23.78 9,479 26.04 1.3297
2023-11-09 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,470 105 0.49 7,521 3.23 1.2792
2023-08-02 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,365 -178 -0.83 7,285 9.53 1.2023
2023-04-21 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,543 12 0.06 6,652 0.02 1.1778
2023-02-10 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,531 -5 -0.02 6,651 15.63 1.2582
2022-10-24 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,536 -242 -1.11 5,751 -3.28 1.2037
2022-07-29 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,778 -206 -0.94 5,946 -23.36 1.1618
2022-05-17 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,984 -403 -1.80 7,758 15.89 1.3185
2022-01-19 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,387 -1,086 -4.63 6,694 4.48 1.1736
2021-11-09 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,473 -379 -1.59 6,407 -3.35 1.2435
2021-08-09 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,852 224 0.95 6,629 9.82 1.2989
2021-04-29 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,628 452 1.95 6,036 12.32 1.3068
2021-01-28 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,176 -13 -0.06 5,374 8.83 1.2504
2020-11-09 2020-09-30 13F BERKSHIRE HATHAWAY INCDEL CL B CL B NEW 084670702 23,189 300 1.31 4,938 20.85 1.3397
2020-08-14 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,889 957 4.36 4,086 1.90 1.1459
2020-04-23 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,932 133 0.61 4,010 -18.78 1.3913
2020-01-28 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,799 -298 -1.35 4,937 7.40 1.3788
2019-10-23 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,097 -211 -0.95 4,597 -3.32 1.3997
2019-07-12 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,308 -58 -0.26 4,755 5.83 1.4323
2019-05-01 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,366 1,018 4.77 4,493 3.07 1.4008
2019-01-17 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,348 935 4.58 4,359 -0.27 1.5664
2018-10-04 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,413 370 1.85 4,371 16.84 1.3487
2018-07-19 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,043 -1,353 -6.32 3,741 -12.35 1.2109
2018-04-13 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,396 -204 -0.94 4,268 -0.33 1.4135
2018-04-13 2017-12-31 13F/A-1 BERKSHIRE HATHAWAY DEL CL B NEW 084670702 21,600 450 2.13 4,282 10.45 1.4043
2018-01-30 2017-12-31 13F BERKSHIRE HATHAWAY DEL CL B NEW 084670702 21,600 450 4,282 1.4007
2017-11-08 2017-09-30 13F BERKSHIRE HATHAWAY INCDEL CL B 084670702 21,150 487 2.36 3,877 10.80 1.3482
2017-08-10 2017-06-30 13F BERKSHIRE HATHAWAY INCDEL CL B COM 084670702 20,663 5,252 34.08 3,499 36.20 1.3025
2017-05-02 2017-03-31 13F BERKSHIRE HATHAWAY INCDEL COM 084670702 15,411 -639 -3.98 2,569 -1.80 1.0210
2017-02-09 2016-12-31 13F BERKSHIRE HATHAWAY INCDEL CL B 084670702 16,050 571 3.69 2,616 16.99 1.1647
2016-11-07 2016-09-30 13F BERKSHIRE HATHAWAY INCDEL CL B CL B 084670702 15,479 38 0.25 2,236 0.04 1.0349
2016-08-08 2016-06-30 13F BERKSHIRE HATHAWAY INCDEL CL B 084670702 15,441 8 0.05 2,235 2.05 1.0824
2016-05-12 2016-03-31 13F BERKSHIRE HATHAWAY INCDEL CL B 084670702 15,433 289 1.91 2,190 9.50 1.0930
2016-02-11 2015-12-31 13F BERKSHIRE HATHAWAY INCDEL CL B 084670702 15,144 -226 -1.47 2,000 -0.20 0.9887
2015-11-10 2015-09-30 13F BERKSHIRE HATHAWAY INCDEL CL B 084670702 15,370 37 0.24 2,004 -3.98 1.0759
2015-08-06 2015-06-30 13F BERKSHIRE HATHAWAY INCDEL CL B 084670702 15,333 -70 -0.45 2,087 -6.12 1.1218
2015-04-28 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B 084670207 15,403 -262 -1.67 2,223 -5.48 1.2801
2015-02-11 2014-12-31 13F BERKSHIRE HTWY CL B 084670207 15,665 15,665 2,352 1.3819
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.