Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionJoel Isaacson & Co., LLC
Latest Disclosed Ownership34,163 shares
Latest Disclosed Value $ 16,370,910
Joel Isaacson & Co., LLC reports 1.12% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On April 22, 2026 - Joel Isaacson & Co., LLC filed a 13F-HR form disclosing ownership of 34,163 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $16,370,910 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 34,550 shares of Berkshire Hathaway Inc.. This represents a change in shares of -1.12% 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)
2026-04-22 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 34,163 -387 -1.12 16,371 -5.74 0.5427
2026-01-30 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 34,550 2,352 7.30 17,367 7.28 0.5734
2025-10-30 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 32,198 865 2.76 16,187 6.35 0.5841
2025-07-23 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 31,333 3,680 13.31 15,221 3.35 0.6190
2025-04-25 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,653 2,596 10.36 14,727 29.67 0.6676
2025-01-28 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,057 154 0.62 11,358 -0.91 0.5120
2024-10-23 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,903 55 0.22 11,462 13.39 0.5466
2024-07-24 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,848 -739 -2.89 10,108 -6.05 0.5309
2024-04-30 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,587 -158 -0.61 10,760 17.17 0.5899
2024-02-12 2023-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,745 1,678 6.97 9,182 8.92 0.5636
2024-01-25 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,745 1,678 9,182 0.5636
2023-10-24 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,067 54 0.22 8,431 2.96 0.5768
2023-07-27 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,013 3,504 17.09 8,188 29.31 0.5481
2023-04-25 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,509 -124 -0.60 6,333 -0.64 0.4551
2023-01-27 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,633 1,046 5.34 6,374 21.85 0.4905
2022-10-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,587 -500 -2.49 5,230 -4.63 0.4518
2022-07-15 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,087 -2,900 -12.62 5,484 -31.17 0.4605
2022-04-21 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,987 295 1.30 7,968 17.44 0.5863
2022-01-19 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,692 600 2.72 6,785 12.52 0.4659
2021-10-21 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,092 500 2.32 6,030 0.48 0.4554
2021-07-20 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,592 430 2.03 6,001 11.01 0.4668
2021-04-23 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,162 1,225 6.14 5,406 16.94 0.4740
2021-01-22 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,937 1,017 5.38 4,623 14.74 0.4526
2020-10-14 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,920 1,000 5.58 4,029 25.95 0.5237
2020-07-21 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,920 448 2.56 3,199 0.16 0.4556
2020-04-21 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,472 -1,045 -5.64 3,194 -23.84 0.5561
2020-01-24 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,517 -1,030 -5.27 4,194 3.15 0.5508
2019-10-15 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,547 -130 -0.66 4,066 -3.08 0.5793
2019-07-11 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,677 -16 -0.08 4,195 6.04 0.6106
2019-04-09 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,693 590 3.09 3,956 5.49 0.5772
2019-01-18 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,103 496 2.67 3,750 -5.87 0.5942
2018-10-19 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,607 353 1.93 3,984 16.94 0.6263
2018-08-01 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,254 0 0.00 3,407 -6.43 0.5705
2018-05-01 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,254 655 3.72 3,641 4.39 0.6351
2018-01-30 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,599 220 1.27 3,488 9.48 0.6053
2017-11-02 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,379 -155 -0.88 3,186 7.27 0.5829
2017-08-01 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,534 -50 -0.28 2,970 1.33 0.5615
2017-05-05 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,584 350 2.03 2,931 4.34 0.5750
2017-01-23 2016-12-31 13F BERKSHIRE HATHAWAY B COM 084670702 17,234 400 2.38 2,809 15.50 0.5650
2016-10-25 2016-09-30 13F BERKSHIRE HATHAWAY B COM 084670702 16,834 -15 -0.09 2,432 -0.33 0.4995
2016-07-22 2016-06-30 13F BERKSHIRE HATHAWAY B COM 084670702 16,849 -1,302 -7.17 2,440 -5.24 0.5192
2016-04-18 2016-03-31 13F BERKSHIRE HATHAWAY COM 084670702 18,151 460 2.60 2,575 10.23 0.5686
2016-01-15 2015-12-31 13F BERKSHIRE HATHAWAY B COM 084670702 17,691 0 0.00 2,336 1.26 0.5737
2015-10-21 2015-09-30 13F BERKSHIRE HATHAWAY B COM 084670702 17,691 0 0.00 2,307 -4.19 0.6158
2015-07-27 2015-06-30 13F BERKSHIRE HATHAWAY B COM 084670702 17,691 -500 -2.75 2,408 -8.27 0.6172
2015-04-14 2015-03-31 13F BERKSHIRE HATHAWAY B NEWCLASS B COM 084670702 18,191 815 4.69 2,625 0.61 0.6620
2015-01-09 2014-12-31 13F BERKSHIRE HATHAWAY B NEWCLASS B COM 084670702 17,376 4 0.02 2,609 8.71 0.7015
2014-10-22 2014-09-30 13F BERKSHIRE HATHAWAY B NEWCLASS B COM 084670702 17,372 100 0.58 2,400 9.79 0.7337
2014-07-21 2014-06-30 13F BERKSHIRE HATHAWAY B COM 084670702 17,272 400 2.37 2,186 3.70 0.6843
2014-04-14 2014-03-31 13F/A-1 BERKSHIRE HATHAWAY B COM 084670702 16,872 0 0.00 2,108 5.40 0.7074
2014-04-11 2014-03-31 13F BERKSHIRE HATHAWAY B COM 084670702 16,872 2,108
2014-02-12 2013-12-31 13F BERKSHIRE HATHAWAY B NEWCLASS B COM 084670702 16,872 5,000 42.12 2,000 48.37 0.7261
2014-02-26 2013-09-30 13F BERKSHIRE HATHAWAY B NEWCLASS B COM 084670702 11,872 550 4.86 1,348 6.39 0.5506
2014-03-03 2013-06-30 13F BERKSHIRE HATHAWAY B NEWCLASS B COM 084670702 11,322 0 0.00 1,267 7.37 0.5959
2014-03-03 2013-03-31 13F BERKSHIRE HATHAWAY B NEWCLASS B COM 084670702 11,322 2,000 21.45 1,180 41.15 0.5978
2014-03-07 2012-12-31 13F BERKSHIRE HATHAWAY B NEWCLASS B COM 084670702 9,322 9,322 836 0.5449
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.