Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionCHICAGO TRUST Co NA
Latest Disclosed Ownership9,137 shares
Latest Disclosed Value $ 4,378,450
CHICAGO TRUST Co NA reports 23.24% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On April 24, 2026 - CHICAGO TRUST Co NA filed a 13F-HR form disclosing ownership of 9,137 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $4,378,450 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 11,903 shares of Berkshire Hathaway Inc.. This represents a change in shares of -23.24% 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)
2026-04-24 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,137 -2,766 -23.24 4,378 -26.83 0.4366
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 0 -100.00 0
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,903 -408 -3.31 5,983 -3.33 0.5931
2025-10-10 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,311 -54 -0.44 6,189 3.05 0.8591
2025-07-14 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,365 4,512 57.46 6,007 43.62 0.8442
2025-04-14 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,853 -424 -5.12 4,182 11.49 0.7417
2025-01-13 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,277 -573 -6.47 3,752 -7.91 0.6640
2024-10-10 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,850 177 2.04 4,073 15.45 0.7023
2024-07-11 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,673 -827 -8.71 3,528 -11.67 0.7157
2024-04-12 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 9,500 -783 -7.61 3,995 8.92 0.8265
2024-01-16 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,283 -1,045 -9.22 3,668 -7.59 0.8154
2023-10-27 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,328 76 0.68 3,968 3.44 0.9965
2023-07-19 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,252 94 0.84 3,837 11.35 0.9200
2023-04-11 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,158 -414 -3.58 3,445 114,733.33 0.8647
2023-01-12 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,572 -808 -6.53 4 -99.91 0.8916
2022-10-13 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,380 -300 -2.37 3,306 -4.51 0.8575
2022-08-03 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,680 -3,123 -19.76 3,462 -37.93 0.8726
2022-04-12 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,803 -128 -0.80 5,578 17.11 0.8816
2022-01-18 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,931 -508 -3.09 4,763 6.15 0.9481
2021-10-13 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,439 498 3.12 4,487 1.29 0.9854
2021-07-21 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,941 367 2.36 4,430 11.33 1.0481
2021-04-12 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,574 -149 -0.95 3,979 9.13 1.3666
2021-01-28 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,723 -17 -0.11 3,646 8.80 1.2532
2020-10-08 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,740 679 4.51 3,351 24.67 1.3972
2020-07-13 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,061 -119 -0.78 2,688 -3.14 1.1893
2020-04-07 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,180 -1,137 -6.97 2,775 -24.90 1.4035
2020-01-13 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,317 -336 -2.02 3,695 6.67 1.5030
2019-10-09 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,653 463 2.86 3,464 0.38 1.4618
2019-07-23 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,190 -291 -1.77 3,451 4.23 1.4706
2019-04-10 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,481 -759 -4.40 3,311 -5.94 1.4270
2019-01-09 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,240 -445 -2.52 3,520 -7.05 1.6680
2018-10-10 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,685 30 0.17 3,787 14.90 1.5086
2018-07-12 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,655 -722 -3.93 3,296 -10.09 1.4029
2018-05-10 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,377 -158 -0.85 3,666 -0.22 1.5659
2018-01-17 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,535 236 1.29 3,674 9.51 1.4680
2017-10-16 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,299 -825 -4.31 3,355 3.58 1.4147
2017-07-12 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,124 1,057 5.85 3,239 7.57 1.4389
2017-04-17 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,067 -520 -2.80 3,011 -0.59 1.3315
2017-01-18 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,587 -1,165 -5.90 3,029 6.13 1.3142
2016-10-12 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,752 3,663 22.77 2,854 22.54 1.2452
2016-07-08 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,089 -1,060 -6.18 2,329 -4.27 0.9570
2016-04-08 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,149 -848 -4.71 2,433 2.40 1.0096
2016-01-08 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,997 560 3.21 2,376 4.49 0.9217
2015-10-14 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,437 346 2.02 2,274 -2.24 0.8732
2015-07-07 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,091 970 6.02 2,326 -0.04 0.8182
2015-04-16 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,121 16,121 2,327 0.7973
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.