Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionBrooktree Capital Management
Latest Disclosed Ownership18,748 shares
Latest Disclosed Value $ 8,984,042
Brooktree Capital Management reports 14.46% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 6, 2026 - Brooktree Capital Management filed a 13F-HR form disclosing ownership of 18,748 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $8,984,042 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 21,916 shares of Berkshire Hathaway Inc.. This represents a change in shares of -14.46% 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)
2026-05-06 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,748 -3,168 -14.46 8,984 -18.45 7.1233
2026-02-02 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,916 -238 -1.07 11,016 -1.09 7.3281
2025-11-07 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,154 1,122 5.33 11,138 9.02 7.0777
2025-08-06 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,032 2,084 11.00 10,217 1.24 6.6806
2025-05-06 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,948 -1,479 -7.24 10,091 8.99 7.5717
2025-02-10 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,427 -109 -0.53 9,259 -2.03 6.8663
2024-11-06 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,536 7 0.03 9,452 13.17 7.6774
2024-08-05 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,529 -1,673 -7.54 8,351 -10.55 7.1415
2024-05-06 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,202 -1,072 -4.61 9,336 12.48 7.2006
2024-02-05 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,274 -2,724 -10.48 8,301 -8.86 6.7087
2023-11-06 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,998 -143 -0.55 9,107 2.17 7.6066
2023-08-08 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 26,141 -1,838 -6.57 8,914 3.18 6.7770
2023-05-08 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,979 -550 -1.93 8,639 -1.96 6.7271
2023-02-07 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 28,529 -668 -2.29 8,813 13.03 7.2403
2022-11-07 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 29,197 809 2.85 7,796 0.59 6.4192
2022-08-08 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 28,388 -139 -0.49 7,750 -23.02 5.8226
2022-05-09 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 28,527 632 2.27 10,067 20.69 6.5614
2022-02-07 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,895 -490 -1.73 8,341 7.67 5.0969
2021-11-09 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 28,385 434 1.55 7,747 -0.27 4.9366
2021-08-09 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,951 123 0.44 7,768 9.27 4.9866
2021-05-03 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,828 404 1.47 7,109 11.81 4.7628
2021-02-03 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,424 -315 -1.14 6,358 7.65 4.6781
2020-11-09 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,739 1,997 7.76 5,906 28.53 4.9985
2020-08-18 2020-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,742 369 1.45 4,595 -0.95 4.3211
2020-08-03 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 25,742 369 4,595 4,554,736.1326
2020-05-06 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 25,373 1,692 7.14 4,639 -13.52 5.3744
2020-02-26 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B Stock 084670702 23,681 23,681 5,364 4.9207
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.