Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionHallmark Capital Management Inc
Latest Disclosed Ownership905 shares
Latest Disclosed Value $ 433,676
Hallmark Capital Management Inc reports 2.37% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 6, 2026 - Hallmark Capital Management Inc filed a 13F-HR form disclosing ownership of 905 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $433,676 USD as of March 31, 2026.

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)
2026-05-06 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 905 -22 -2.37 434 -6.88 0.0255
2026-02-04 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 927 -44 -4.53 466 -4.71 0.0299
2025-11-03 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 971 300 44.71 488 50.15 0.0323
2025-08-06 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 671 0 0.00 326 -8.96 0.0234
2025-05-07 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 671 -170 -20.21 357 -6.30 0.0271
2025-01-31 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 841 -100 -10.63 381 -12.01 0.0285
2024-11-06 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 941 0 0.00 433 13.35 0.0321
2024-08-08 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 941 90 10.58 383 7.00 0.0305
2024-05-03 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 851 -431 -33.62 358 -21.88 0.0270
2024-02-07 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,282 42 3.39 457 5.30 0.0357
2023-11-09 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,240 0 0.00 434 2.84 0.0362
2023-07-28 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,240 0 0.00 423 10.47 0.0380
2023-05-03 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,240 0 0.00 383 -0.26 0.0348
2023-02-01 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,240 -529 -29.90 383 -19.03 0.0356
2022-11-09 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,769 442 33.31 473 30.66 0.0472
2022-11-16 2022-06-30 13F/A-3 BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,327 -250 -15.85 362 -34.89 0.0339
2022-08-01 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 1,327 -250 362 0.0339
2022-05-02 2022-03-31 13F BERKSHIRE HATHAWAY COM 084670702 1,577 -21 -1.31 556 16.32 0.0465
2022-02-02 2021-12-31 13F BERKSHIRE HATHAWAY COM 084670702 1,598 0 0.00 478 9.63 0.0383
2021-11-01 2021-09-30 13F BERKSHIRE HATHAWAY COM 084670702 1,598 -134 -7.74 436 -9.36 0.0380
2021-08-03 2021-06-30 13F BERKSHIRE HATHAWAY COM 084670702 1,732 442 34.26 481 45.76 0.0407
2021-04-22 2021-03-31 13F BERKSHIRE HATHAWAY COM 084670702 1,290 -25 -1.90 330 8.20 0.0296
2021-02-02 2020-12-31 13F BERKSHIRE HATHAWAY COM 084670702 1,315 0 0.00 305 8.93 0.0298
2020-11-03 2020-09-30 13F BERKSHIRE HATHAWAY COM 084670702 1,315 1,315 280 0.0308
2020-04-24 2020-03-31 13F BERKSHIRE HATHAWAY COM 084670702 0 -942 -100.00 0 -100.00
2020-01-31 2019-12-31 13F BERKSHIRE HATHAWAY COM 084670702 942 942 214 0.0214
2019-11-01 2019-09-30 13F BERKSHIRE HATHAWAY COM 084670702 0 -1,035 -100.00 0 -100.00
2019-08-08 2019-06-30 13F BERKSHIRE HATHAWAY COM 084670702 1,035 -86 -7.67 220 -2.22 0.0234
2019-05-09 2019-03-31 13F BERKSHIRE HATHAWAY COM 084670702 1,121 0 0.00 225 -1.75 0.0245
2019-02-08 2018-12-31 13F BERKSHIRE HATHAWAY COM 084670702 1,121 1,121 229 0.0299
2018-04-27 2018-03-31 13F BERKSHIRE HATHAWAY COM 084670702 0 -1,400 -100.00 0 -100.00
2018-01-24 2017-12-31 13F BERKSHIRE HATHAWAY COM 084670702 1,400 0 0.00 278 8.17 0.0334
2017-10-30 2017-09-30 13F BERKSHIRE HATHAWAY COM 084670702 1,400 0 0.00 257 8.44 0.0323
2017-07-13 2017-06-30 13F BERKSHIRE HATHAWAY COM 084670702 1,400 -325 -18.84 237 -17.71 0.0318
2017-05-12 2017-03-31 13F BERKSHIRE HATHAWAY COM 084670702 1,725 -1,173 -40.48 288 -38.98 0.0382
2017-02-13 2016-12-31 13F BERKSHIRE HATHAWAY COM 084670702 2,898 226 8.46 472 22.28 0.0675
2016-11-09 2016-09-30 13F BERKSHIRE HATHAWAY COM 084670702 2,672 -155 -5.48 386 -5.62 0.0567
2016-08-05 2016-06-30 13F BERKSHIRE HATHAWAY COM 084670702 2,827 155 5.80 409 7.92 0.0623
2016-05-06 2016-03-31 13F BERKSHIRE HATHAWAY COM 084670702 2,672 -30 -1.11 379 6.16 0.0640
2016-02-05 2015-12-31 13F BERKSHIRE HATHAWAY COM 084670702 2,702 22 0.82 357 2.00 0.0640
2015-10-30 2015-09-30 13F BERKSHIRE HATHAWAY COM 084670702 2,680 0 0.00 350 -4.11 0.0637
2015-07-30 2015-06-30 13F BERKSHIRE HATHAWAY COM 084670702 2,680 -370 -12.13 365 -17.05 0.0635
2015-05-06 2015-03-31 13F BERKSHIRE HATHAWAY COM 084670702 3,050 -2,900 -48.74 440 -50.78 0.0758
2015-02-06 2014-12-31 13F BERKSHIRE HATHAWAY COM 084670702 5,950 125 2.15 894 11.06 0.1598
2014-11-05 2014-09-30 13F BERKSHIRE HATHAWAY COM 084670702 5,825 0 0.00 805 9.08 0.1541
2014-08-04 2014-06-30 13F BERKSHIRE HATHAWAY COM 084670702 5,825 0 0.00 738 1.37 0.1402
2014-05-07 2014-03-31 13F BERKSHIRE HATHAWAY COM 084670702 5,825 0 0.00 728 5.51 0.1454
2014-02-07 2013-12-31 13F BERKSHIRE HATHAWAY COM 084670702 5,825 0 0.00 690 4.39 0.1417
2013-11-01 2013-09-30 13F BERKSHIRE HATHAWAY COM 084670702 5,825 -100 -1.69 661 -0.30 0.1444
2013-08-06 2013-06-30 13F BERKSHIRE HATHAWAY COM 084670702 5,925 5,925 663 0.1503
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.