Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionCornerstone Advisory, LLC
Latest Disclosed Ownership54,202 shares
Latest Disclosed Value $ 25,973,598
Cornerstone Advisory, LLC reports 0.42% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 4, 2026 - Cornerstone Advisory, LLC filed a 13F-HR form disclosing ownership of 54,202 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $25,973,598 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 1 shares of Berkshire Hathaway Inc.. This represents a change in shares of 0.42% 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)
2026-05-04 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 54,202 227 0.42 25,974 -4.26 2.4591
2026-01-28 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 53,975 869 1.64 27,131 1.62 2.5870
2025-11-07 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 53,106 8,726 19.66 26,699 23.84 2.6222
2025-07-30 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 44,380 144 0.33 21,558 -4.88 2.3150
2025-05-07 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 44,236 -70 -0.16 22,663 6.66 2.6451
2025-02-18 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 44,306 1,211 2.81 21,249 7.13 2.4138
2024-11-12 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 43,095 164 0.38 19,835 13.57 2.6101
2024-08-14 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 42,931 -723 -1.66 17,464 -4.86 2.4562
2024-05-08 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 43,654 1,169 2.75 18,357 21.15 2.6172
2024-02-13 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 42,485 469 1.12 15,153 2.95 2.3629
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 42,016 6,154 17.16 14,718 20.36 2.5749
2023-07-20 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 35,862 -1,517 -4.06 12,229 5.95 2.1484
2023-05-04 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 37,379 -758 -1.99 11,542 -2.03 2.0784
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 38,137 -669 -1.72 11,781 13.68 2.3212
2022-10-26 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 38,806 2,448 6.73 10,362 4.39 2.3141
2022-08-02 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 36,358 -3,554 -8.90 9,926 -29.53 2.2708
2022-05-20 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 39,912 222 0.56 14,085 18.68 2.1478
2022-02-23 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 39,690 1,279 3.33 11,868 13.20 1.7059
2021-11-16 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 38,411 -502 -1.29 10,484 -3.06 1.7358
2021-08-16 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 38,913 195 0.50 10,815 9.34 1.8220
2021-05-13 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 38,718 -1,670 -4.13 9,891 5.62 1.8718
2021-05-11 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 40,388 -6,841 -14.48 9,365 -6.88 1.8955
2020-11-12 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 47,229 -10,000 -17.47 10,057 -1.56 2.3460
2020-08-10 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 57,229 -1,234 -2.11 10,216 -4.43 2.6652
2020-05-11 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 58,463 14,172 32.00 10,689 6.55 3.2499
2020-02-12 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 44,291 7,949 21.87 10,032 32.70 2.0771
2019-11-12 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 36,342 2,587 7.66 7,560 5.07 1.6311
2019-08-08 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 33,755 -1,592 -4.50 7,195 1.32 1.5597
2019-05-08 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 35,347 29,193 474.37 7,101 464.92 1.5623
2019-02-12 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,154 6,154 1,257 0.3298
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.