Berkshire Hathaway Inc.
PL ˙ WSE
1.702,00 PLN 0,00 (0,00%)
2026-05-07
DEL PRIS
SecurityPL:BRKB / Berkshire Hathaway Inc.
InstitutionCore Wealth Partners LLC
Latest Disclosed Ownership14,273 shares
Latest Disclosed Value $ 6,839,622
Core Wealth Partners LLC reports 1.22% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 8, 2026 - Core Wealth Partners LLC filed a 13F-HR form disclosing ownership of 14,273 shares of Berkshire Hathaway Inc. (PL:BRKB) valued at $26,148,136 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 14,449 shares of Berkshire Hathaway Inc.. This represents a change in shares of -1.22% during the quarter. The current value of the position is $24,292,646 USD.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-08 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,273 -176 -1.22 6,840 -5.82 3.1801
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,449 628 4.54 7,263 4.52 3.2696
2025-11-04 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,821 -235 -1.67 6,948 1.77 3.1894
2025-08-11 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,056 799 6.03 6,828 -3.30 3.4643
2025-05-13 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,257 576 4.54 7,060 22.83 4.1055
2025-02-12 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,681 283 2.28 5,748 0.74 3.2942
2024-11-04 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,398 621 5.27 5,706 19.12 3.4602
2024-08-14 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,777 356 3.12 4,791 -0.25 3.2735
2024-04-19 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,421 298 2.68 4,803 21.05 3.6306
2024-02-08 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,123 814 7.90 3,967 9.86 3.2509
2023-11-13 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,309 -133 -1.27 3,611 1.43 3.2812
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,442 335 3.31 3,561 14.10 3.2890
2023-05-12 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,107 5,238 107.58 3,121 474.59 3.1335
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,869 4,869 544 0.6119
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.