Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionTower Bridge Advisors
Latest Disclosed Ownership12,426 shares
Latest Disclosed Value $ 5,954,539
Tower Bridge Advisors ownership in BRKB / Berkshire Hathaway Inc.

On May 12, 2026 - Tower Bridge Advisors filed a 13F-HR form disclosing ownership of 12,426 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $5,954,539 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1 shares of Berkshire Hathaway Inc.. This represents a change in shares of 0.00% 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. Class B Common 084670702 12,426 0 0.00 5,955 -4.66 0.5751
2026-02-13 2025-12-31 13F BERKSHIRE HATHAWAY COMMON 084670702 12,426 0 0.00 6,246 -0.03 0.6308
2025-11-12 2025-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 12,426 -1,200 -8.81 6,247 -5.62 0.6239
2025-08-11 2025-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 13,626 0 0.00 6,619 -8.78 0.7115
2025-05-08 2025-03-31 13F BERKSHIRE HATHAWAY COMMON 084670702 13,626 -330 -2.36 7,257 14.72 0.8108
2025-02-05 2024-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 13,956 0 0.00 6,326 -1.53 0.6737
2024-11-06 2024-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 13,956 0 0.00 6,423 13.14 0.6666
2024-07-24 2024-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 13,956 -500 -3.46 5,677 -6.61 0.6310
2024-04-29 2024-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 14,456 -1,142 -7.32 6,079 9.28 0.6187
2024-02-14 2023-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 15,598 -198 -1.25 5,563 0.54 0.4785
2023-11-01 2023-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 15,796 121 0.77 5,533 3.52 0.5122
2023-07-20 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,675 -9,256 -37.13 5,345 -30.56 0.4900
2023-04-26 2023-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 24,931 29 0.12 7,698 0.07 0.6303
2023-01-27 2022-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 24,902 -339 -1.34 7,692 14.14 0.6389
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 25,241 0 0.00 6,740 -2.21 0.5989
2022-07-21 2022-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 25,241 -170 -0.67 6,891 -23.15 0.5620
2022-05-05 2022-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 25,411 -400 -1.55 8,968 16.20 0.5994
2022-02-09 2021-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 25,811 0 0.00 7,717 9.55 0.4739
2021-10-28 2021-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 25,811 9,925 62.48 7,045 59.55 0.4700
2021-08-10 2021-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 15,886 -2,675 -14.41 4,415 -6.88 0.2943
2021-05-12 2021-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 18,561 0 0.00 4,742 10.18 0.3570
2021-02-11 2020-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 18,561 -601 -3.14 4,304 5.47 0.3505
2020-11-13 2020-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 19,162 -50 -0.26 4,080 18.99 0.4169
2020-07-22 2020-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 19,212 -555 -2.81 3,430 -5.12 0.3845
2020-04-27 2020-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 19,767 -50 -0.25 3,614 -19.47 0.4744
2020-02-05 2019-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 19,817 1,129 6.04 4,489 8.54 0.4741
2019-11-12 2019-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 18,688 -145 -0.77 4,136 3.01 0.4528
2019-08-06 2019-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 18,833 0 0.00 4,015 6.11 0.4491
2019-04-30 2019-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 18,833 270 1.45 3,783 -0.18 0.4392
2019-02-07 2018-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 18,563 -500 -2.62 3,790 -7.13 0.4883
2018-10-23 2018-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 19,063 0 0.00 4,082 14.70 0.4264
2018-08-09 2018-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 19,063 -300 -1.55 3,558 -7.87 0.3968
2018-05-02 2018-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 19,363 -1,073 -5.25 3,863 -4.64 0.4283
2018-01-30 2017-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 20,436 -100 -0.49 4,051 7.60 0.4345
2017-11-06 2017-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 20,536 -1,371 -6.26 3,765 1.46 0.4278
2017-07-26 2017-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 21,907 -2,341 -9.65 3,710 -8.19 0.4254
2017-05-02 2017-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 24,248 626 2.65 4,042 4.99 0.4719
2017-01-31 2016-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,622 -200 -0.84 3,850 11.86 0.4666
2016-10-27 2016-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,822 -30 -0.13 3,442 -0.35 0.4190
2016-08-12 2016-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,852 -50 -0.21 3,454 1.83 0.4302
2016-05-12 2016-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,902 75 0.31 3,391 7.79 0.4236
2016-02-02 2015-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,827 397 1.69 3,146 2.98 0.4099
2015-11-13 2015-09-30 13F/A-1 BERKSHIRE HATHAWAY IN COMMON 084670702 23,430 200 0.86 3,055 -3.35 0.4204
2015-11-12 2015-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,230 3,162
2015-08-13 2015-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,230 -800 -3.33 3,162 -8.85 0.3999
2015-05-14 2015-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 24,030 80 0.33 3,468 -3.56 0.4393
2015-02-19 2014-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,950 601 2.57 3,596 11.50 0.4422
2014-11-12 2014-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 23,349 465 2.03 3,225 11.36 0.4068
2014-08-26 2014-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 22,884 0 0.00 2,896 1.29 0.3572
2014-05-08 2014-03-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 22,884 400 1.78 2,860 7.28 0.3675
2014-02-10 2013-12-31 13F BERKSHIRE HATHAWAY IN COMMON 084670702 22,484 0 0.00 2,666 4.43 0.3499
2013-11-05 2013-09-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 22,484 -169 -0.75 2,552 0.67 0.3661
2013-07-24 2013-06-30 13F BERKSHIRE HATHAWAY IN COMMON 084670702 22,653 22,653 2,535 0.3758
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.