Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionKnuff & Co LLC
Latest Disclosed Ownership14,367 shares
Latest Disclosed Value $ 6,884,666
Knuff & Co LLC reports 15.05% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 11, 2026 - Knuff & Co LLC filed a 13F-HR form disclosing ownership of 14,367 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $6,884,666 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 16,913 shares of Berkshire Hathaway Inc.. This represents a change in shares of -15.05% 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.

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)
2026-05-11 2026-03-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 14,367 -2,546 -15.05 6,885 -19.02 2.0746
2026-02-04 2025-12-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 16,913 140 0.83 8,501 0.82 2.5057
2025-11-13 2025-09-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 16,773 436 2.67 8,432 6.25 2.4430
2025-08-13 2025-06-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 16,337 -60 -0.37 7,936 -9.12 2.4988
2025-05-13 2025-03-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 16,397 1,015 6.60 8,733 25.24 2.9302
2025-02-10 2024-12-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 15,382 141 0.93 6,972 -0.60 2.1192
2024-11-07 2024-09-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 15,241 400 2.70 7,015 16.18 2.1409
2024-08-01 2024-06-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 14,841 33 0.22 6,037 -3.05 1.9594
2024-05-09 2024-03-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 14,808 -217 -1.44 6,227 16.22 2.0931
2024-02-06 2023-12-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 15,025 332 2.26 5,359 4.12 1.9532
2023-11-09 2023-09-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 14,693 -84 -0.57 5,147 2.14 2.0517
2023-08-08 2023-06-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 14,777 -575 -3.75 5,039 6.29 1.8880
2023-05-09 2023-03-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 15,352 -858 -5.29 4,740 -5.33 1.8765
2023-02-09 2022-12-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 16,210 15 0.09 5,007 15.80 2.1349
2022-11-04 2022-09-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 16,195 -676 -4.01 4,324 -6.12 2.0464
2022-08-08 2022-06-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 16,871 1,460 9.47 4,606 -15.32 2.0711
2022-05-10 2022-03-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 15,411 1,037 7.21 5,439 26.55 1.9727
2022-02-09 2021-12-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 14,374 163 1.15 4,298 10.80 1.3321
2021-11-16 2021-09-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 14,211 130 0.92 3,879 -0.87 1.4509
2021-08-10 2021-06-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 14,081 740 5.55 3,913 14.82 1.4538
2021-05-04 2021-03-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 13,341 2,771 26.22 3,408 39.05 1.4581
2021-02-03 2020-12-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 10,570 -175 -1.63 2,451 7.12 1.0099
2020-11-03 2020-09-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 10,745 1,930 21.89 2,288 45.36 1.0772
2020-08-07 2020-06-30 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 8,815 -425 -4.60 1,574 -6.81 0.8623
2020-05-13 2020-03-31 13F BERKSHIRE HATHAWAY INC CL B COM 084670702 9,240 -5,195 -35.99 1,689 -48.33 1.2263
2020-02-11 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 14,435 935 6.93 3,269 16.38 1.9550
2019-11-05 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 13,500 -2,890 -17.63 2,809 -19.61 1.9307
2019-08-08 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 16,390 3,210 24.36 3,494 31.95 2.4864
2019-05-08 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 13,180 3,350 34.08 2,648 31.94 2.0335
2019-02-14 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 9,830 9,830 2,007 1.9716
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.