Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionEastern Bank
Latest Disclosed Ownership57,625 shares
Latest Disclosed Value $ 27,613,900
Eastern Bank reports 80.48% increase in ownership of BRKB / Berkshire Hathaway Inc.

On April 7, 2026 - Eastern Bank filed a 13F-HR form disclosing ownership of 57,625 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $27,613,900 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 31,928 shares of Berkshire Hathaway Inc.. This represents a change in shares of 80.48% 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)
2026-04-07 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 57,625 25,697 80.48 27,614 72.07 0.4324
2026-01-14 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 31,928 2,473 8.40 16,049 8.37 0.2520
2025-10-27 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 29,455 -318 -1.07 14,808 2.39 0.2631
2025-07-24 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 29,773 1,380 4.86 14,463 -4.36 0.2753
2025-05-08 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 28,393 -850 -2.91 15,122 14.08 0.2961
2025-01-13 2024-12-31 13F Berkshire Hathaway CL B NEW 084670702 29,243 431 1.50 13,255 -0.05 0.2463
2024-10-21 2024-09-30 13F Berkshire Hathaway CL B NEW 084670702 28,812 25,658 813.51 13,261 933.59 0.2376
2024-07-23 2024-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,154 0 0.00 1,283 -3.24 0.0518
2024-05-09 2024-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,154 484 18.13 1,326 39.29 0.0552
2024-01-25 2023-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,670 66 2.53 952 4.39 0.0432
2023-10-17 2023-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,604 0 0.00 912 2.82 0.0453
2023-07-19 2023-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,604 -69 -2.58 888 7.52 0.0422
2023-04-19 2023-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,673 -1,043 -28.07 825 -28.07 0.0415
2023-01-24 2022-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,716 36 0.98 1,148 16.68 0.0613
2022-10-19 2022-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,680 -235 -6.00 983 -8.04 0.0561
2022-07-20 2022-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,915 -602 -13.33 1,069 -32.94 0.0569
2022-04-21 2022-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 4,517 -2,683 -37.26 1,594 -25.96 0.0739
2022-01-26 2021-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 7,200 5,243 267.91 2,153 303.18 0.0939
2021-10-19 2021-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 1,957 50 2.62 534 0.75 0.0258
2021-07-20 2021-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 1,907 -20 -1.04 530 7.72 0.0260
2021-04-27 2021-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 1,927 0 0.00 492 10.07 0.0266
2021-01-20 2020-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 1,927 -1,220 -38.77 447 -33.28 0.0250
2020-10-30 2020-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,147 41 1.32 670 20.94 0.0410
2020-09-01 2020-06-30 13F/A-1 BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,106 -50 -1.58 554 -3.99 0.0360
2020-07-21 2020-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,106 -50 554 36,035.1453
2020-04-27 2020-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,156 -200 -5.96 577 -24.08 0.0430
2020-02-04 2019-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,356 0 0.00 760 8.88 0.0441
2019-11-04 2019-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,356 -1,148 -25.49 698 -27.29 0.0435
2019-07-24 2019-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 4,504 2,554 130.97 960 144.90 0.0611
2019-04-18 2019-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 1,950 -166 -7.84 392 -9.26 0.0263
2019-01-18 2018-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,116 0 0.00 432 -4.64 0.0323
2018-10-16 2018-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,116 0 0.00 453 14.68 0.0296
2018-07-18 2018-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,116 0 0.00 395 -6.40 0.0270
2018-04-09 2018-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,116 -9 -0.42 422 0.24 0.0295
2018-01-22 2017-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,125 -1,000 -32.00 421 -26.40 0.0282
2017-10-24 2017-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,125 0 0.00 572 8.13 0.0405
2017-07-26 2017-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,125 0 0.00 529 1.54 0.0389
2017-04-17 2017-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,125 -258 -7.63 521 -5.44 0.0393
2017-01-18 2016-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,383 75 2.27 551 15.51 0.0429
2016-10-17 2016-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,308 0 0.00 477 -0.42 0.0383
2016-07-15 2016-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,308 -200 -5.70 479 -3.82 0.0387
2016-04-14 2016-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 3,508 1,100 45.68 498 56.60 0.0406
2016-01-20 2015-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,408 -142 -5.57 318 -4.22 0.0265
2015-10-16 2015-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,550 55 2.20 332 -2.35 0.0289
2015-07-16 2015-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,495 -50 -1.96 340 -7.36 0.0275
2015-04-17 2015-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,545 -38 -1.47 367 -5.17 0.0294
2015-01-12 2014-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,583 -300 -10.41 387 -2.76 0.0307
2014-10-15 2014-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,883 200 7.45 398 17.06 0.0322
2014-07-16 2014-06-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,683 125 4.89 340 6.58 0.0275
2014-04-17 2014-03-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,558 -250 -8.90 319 -4.49 0.0269
2014-01-21 2013-12-31 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,808 0 0.00 334 4.70 0.0285
2013-10-18 2013-09-30 13F BERKSHIRE HATHAWAY COMMON STOCKS 084670702 2,808 2,808 319 0.0293
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.