Berkshire Hathaway Inc.
US ˙ NYSE

SecurityBRK.B / Berkshire Hathaway Inc.
InstitutionTarbox Family Office, Inc.
Latest Disclosed Ownership1,510 shares
Latest Disclosed Value $ 723,592
Tarbox Family Office, Inc. reports 28.77% decrease in ownership of BRK.B / Berkshire Hathaway Inc.

On April 23, 2026 - Tarbox Family Office, Inc. filed a 13F-HR form disclosing ownership of 1,510 shares of Berkshire Hathaway Inc. (US:BRK.B) valued at $723,592 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 2,120 shares of Berkshire Hathaway Inc.. This represents a change in shares of -28.77% during the quarter. The current value of the position is $717,809 USD.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-23 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,510 -610 -28.77 724 -32.11 0.1175
2026-01-21 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,120 -62 -2.84 1,066 -2.83 0.1714
2025-10-24 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,182 -7 -0.32 1,097 3.10 0.1610
2025-08-12 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,189 -45 -2.01 1,063 -10.60 0.1599
2025-05-08 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,234 -20 -0.89 1,190 16.45 0.1978
2025-01-17 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,254 -7 -0.31 1,022 -1.83 0.1685
2024-10-23 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,261 -15 -0.66 1,041 12.43 0.1705
2024-07-17 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,276 -12 -0.52 926 -3.85 0.1633
2024-04-16 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,288 100 4.57 962 23.33 0.1691
2024-02-08 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,188 0 0.00 780 1.83 0.1518
2023-10-13 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,188 0 0.00 766 2.68 0.1588
2023-07-20 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,188 100 4.79 746 15.84 0.1451
2023-04-11 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,088 -3 -0.14 645 -0.16 0.1303
2023-01-25 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,091 -1 -0.05 646 12.96 0.1416
2022-10-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,092 0 0.00 571 0.00 0.1354
2022-07-19 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,092 -1 -0.05 571 -22.73 0.1282
2022-04-25 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,093 -758 -26.59 739 -13.26 0.1500
2022-01-06 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,851 -3 -0.11 852 9.37 0.1467
2021-10-12 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,854 -365 -11.34 779 -12.96 0.1426
2021-07-16 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,219 32 1.00 895 9.95 0.1600
2021-04-27 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,187 9 0.28 814 10.45 0.1602
2021-01-27 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,178 -117 -3.55 737 4.99 0.1541
2020-10-22 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,295 1,512 84.80 702 120.75 0.1709
2020-07-23 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,783 206 13.06 318 10.42 0.0822
2020-04-30 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,577 73 4.85 288 -15.54 0.0933
2020-01-31 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,504 80 5.62 341 15.20 0.0931
2019-10-25 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,424 0 0.00 296 -2.63 0.0900
2019-08-02 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,424 60 4.40 304 10.95 0.0951
2019-04-24 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,364 -2 -0.15 274 -1.79 0.1002
2019-02-01 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,366 0 0.00 279 -4.45 0.1156
2018-10-26 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,366 -345 -20.16 292 -8.46 0.1056
2018-07-31 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,711 -314 -15.51 319 -21.04 0.1230
2018-04-24 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 2,025 1,079 114.06 404 114.89 0.1561
2018-01-26 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 946 -11 -1.15 188 7.43 0.0746
2017-10-19 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 957 83 9.50 175 18.24 0.0767
2017-07-18 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 874 0 0.00 148 1.37 0.0730
2017-04-28 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 874 0 0.00 146 2.82 0.0754
2017-01-31 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 874 0 0.00 142 12.70 0.0815
2016-10-28 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 874 0 0.00 126 -0.79 0.0812
2016-07-29 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 874 0 0.00 127 2.42 0.0911
2016-04-27 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 874 -200 -18.62 124 -12.68 0.0939
2016-01-29 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,074 -628 -36.90 142 -36.04 0.1154
2015-10-30 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,702 28 1.67 222 -2.63 0.2030
2015-07-16 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,674 -410 -19.67 228 -24.25 0.1977
2015-04-20 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 2,084 -2 -0.10 301 -3.83 0.2645
2015-01-21 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 2,086 -1,908 -47.77 313 -43.30 0.2895
2014-10-14 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 3,994 50 1.27 552 10.62 0.4980
2014-07-11 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 3,944 20 0.51 499 2.25 0.4453
2014-05-01 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 3,924 -50 -1.26 488 3.61 0.4343
2014-02-14 2013-12-31 13F BERKSHIRE HATHAWAY B Total COM 084670702 3,974 3,974 471 0.3929
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.