Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionGrove Bank & Trust
Latest Disclosed Ownership5,129 shares
Latest Disclosed Value $ 2,457,817
Grove Bank & Trust reports 6.30% increase in ownership of BRKB / Berkshire Hathaway Inc.

On April 8, 2026 - Grove Bank & Trust filed a 13F-HR form disclosing ownership of 5,129 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $2,457,817 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 4,825 shares of Berkshire Hathaway Inc.. This represents a change in shares of 6.30% 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)
2026-04-08 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,129 304 6.30 2,458 1.32 0.2779
2026-01-08 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,825 45 0.94 2,425 0.92 0.2728
2025-10-06 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,780 -3 -0.06 2,403 3.44 0.2811
2025-07-11 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,783 -21 -0.44 2,323 -9.19 0.2898
2025-04-17 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,804 1,293 36.83 2,559 60.78 0.3419
2025-01-16 2024-12-31 13F Berkshire Hathaway CL B NEW 084670702 3,511 114 3.36 1,591 1.79 0.2209
2024-10-11 2024-09-30 13F Berkshire Hathaway CL B NEW 084670702 3,397 229 7.23 1,564 21.35 0.2309
2024-07-24 2024-06-30 13F Berkshire Hathaway CL B NEW 084670702 3,168 -100 -3.06 1,289 -6.26 0.2069
2024-04-30 2024-03-31 13F Berkshire Hathaway CL B NEW 084670702 3,268 -120 -3.54 1,374 13.74 0.2315
2024-01-30 2023-12-31 13F Berkshire Hathaway CL B NEW 084670702 3,388 68 2.05 1,208 3.96 0.2223
2023-10-30 2023-09-30 13F Berkshire Hathaway CL B NEW 084670702 3,320 46 1.41 1,163 4.12 0.2371
2023-07-27 2023-06-30 13F Berkshire Hathaway CL B NEW 084670702 3,274 -9 -0.27 1,116 10.17 0.2255
2023-05-10 2023-03-31 13F Berkshire Hathaway CL B NEW 084670702 3,283 17 0.52 1,014 101,200.00 0.2143
2023-02-03 2022-12-31 13F Berkshire Hathaway CL B NEW 084670702 3,266 -141 -4.14 1 -99.89 0.2226
2022-10-28 2022-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 3,407 -30 -0.87 910 -2.99 0.2255
2022-07-29 2022-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 3,437 -59 -1.69 938 -23.99 0.2246
2022-04-22 2022-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 3,496 366 11.69 1,234 31.84 0.2427
2022-01-31 2021-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 3,130 0 0.00 936 9.60 0.1788
2021-10-28 2021-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 3,130 83 2.72 854 0.83 0.1797
2021-07-28 2021-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 3,047 -19 -0.62 847 8.17 0.1834
2021-04-23 2021-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 3,066 700 29.59 783 42.62 0.1842
2021-02-03 2020-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,366 -20 -0.84 549 8.07 0.1426
2020-10-30 2020-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,386 101 4.42 508 24.51 0.1556
2020-07-31 2020-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,285 -248 -9.79 408 -11.88 0.1344
2020-05-05 2020-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,533 -140 -5.24 463 -23.47 0.1827
2020-02-11 2019-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,673 0 0.00 605 8.81 0.1818
2019-10-30 2019-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,673 211 8.57 556 5.90 0.1792
2019-07-24 2019-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,462 -82 -3.22 525 2.74 0.1918
2019-04-26 2019-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,544 677 36.26 511 34.12 0.1961
2019-02-13 2018-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 1,867 -387 -17.17 381 -21.12 0.1778
2018-11-07 2018-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,254 -313 -12.19 483 0.84 0.1983
2018-08-03 2018-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,567 -95 -3.57 479 -9.79 0.2041
2018-05-07 2018-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,662 -60 -2.20 531 -1.67 0.2350
2018-02-02 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 2,722 -95 -3.37 540 4.65 0.2357
2017-11-13 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 2,817 252 9.82 516 18.89 0.2509
2017-07-28 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 2,565 501 24.27 434 26.16 0.2776
2017-04-28 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 2,064 -1,322 -39.04 344 -37.68 0.2824
2017-02-03 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 3,386 475 16.32 552 31.12 0.4215
2016-11-04 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 2,911 0 0.00 421 -0.24 0.3587
2016-08-05 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 2,911 -100 -3.32 422 -1.17 0.3781
2016-05-11 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 3,011 2,778 1,192.27 427 1,277.42 0.3891
2016-01-27 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 233 233 31 0.0278
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.