Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionWeaver Consulting Group
Latest Disclosed Ownership5,227 shares
Latest Disclosed Value $ 2,504,606
Weaver Consulting Group reports 12.53% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 15, 2026 - Weaver Consulting Group filed a 13F-HR form disclosing ownership of 5,227 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $2,504,606 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 4,645 shares of Berkshire Hathaway Inc.. This represents a change in shares of 12.53% 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)
2026-05-15 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,227 582 12.53 2,505 7.28 0.5969
2026-02-10 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,645 6 0.13 2,335 0.09 0.5708
2025-11-12 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,639 180 4.04 2,332 7.71 0.5933
2025-08-12 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,459 -18 -0.40 2,166 -9.19 0.5991
2025-04-28 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,477 -38 -0.84 2,384 16.52 0.7181
2025-01-08 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,515 -815 -15.29 2,046 -16.59 0.6294
2024-11-14 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,330 -110 -2.02 2,453 10.90 0.7795
2024-07-12 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,440 -43 -0.78 2,213 -4.03 0.7722
2024-04-16 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,483 -398 -6.77 2,306 9.92 0.8533
2024-01-22 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,881 -29 -0.49 2,097 1.30 0.8527
2023-10-13 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,910 -125 -2.07 2,070 0.63 0.9351
2023-07-19 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,035 -21 -0.35 2,058 10.06 0.9082
2023-04-11 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,056 167 2.84 1,870 2.75 0.8564
2023-01-09 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,889 -116 -1.93 1,819 13.40 0.9283
2022-10-04 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,005 -94 -1.54 1,604 -3.66 0.9207
2022-07-20 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,099 58 0.96 1,665 -21.90 0.9310
2022-05-06 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,041 308 5.37 2,132 24.39 1.0340
2022-02-01 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,733 -123 -2.10 1,714 7.26 0.8253
2021-10-28 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,856 50 0.86 1,598 -0.99 0.8680
2021-07-06 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,806 37 0.64 1,614 9.50 0.9092
2021-04-07 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,769 464 8.75 1,474 19.84 0.9053
2021-01-29 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,305 -13 -0.24 1,230 8.66 0.7670
2020-10-28 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 5,318 117 2.25 1,132 21.98 0.6518
2020-07-24 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 5,201 600 13.04 928 10.34 0.5401
2020-04-28 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 4,601 -79 -1.69 841 -13.66 0.5489
2020-01-31 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 4,680 -140 -2.90 974 -2.79 0.5213
2019-11-22 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 4,820 0 0.00 1,002 -2.43 0.5306
2019-08-05 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 4,820 150 3.21 1,027 6.20 0.5600
2019-06-19 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL Common Stock 084670702 4,670 4,670 967 0.2728
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.