Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionDrystone LLC
Latest Disclosed Ownership14,730 shares
Latest Disclosed Value $ 7,058,616
Drystone LLC ownership in BRKB / Berkshire Hathaway Inc.

On May 6, 2026 - Drystone LLC filed a 13F-HR form disclosing ownership of 14,730 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $7,058,616 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 14,730 shares of Berkshire Hathaway Inc.. This represents a change in shares of 0.00% 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 B Class B common stock 084670207 14,730 0 0.00 7,059 -4.67 6.3626
2026-02-06 2025-12-31 13F Berkshire Hathaway B Class B common stock 084670207 14,730 -160 -1.07 7,404 -1.08 6.6558
2025-11-17 2025-09-30 13F Berkshire Hathaway B Class B common stock 084670207 14,890 -90 -0.60 7,486 2.87 6.7359
2025-08-06 2025-06-30 13F Berkshire Hathaway B Class B common stock 084670207 14,980 -50 -0.33 7,277 -9.10 6.6698
2025-05-01 2025-03-31 13F Berkshire Hathaway B Class B common stock 084670207 15,030 -25 -0.17 8,005 17.29 8.0161
2025-01-23 2024-12-31 13F Berkshire Hathaway B Class B common stock 084670207 15,055 -100 -0.66 6,824 68.62 6.8159
2022-11-01 2022-09-30 13F Berkshire Hathaway B Class B common stock 084670207 15,155 400 2.71 4,047 0.47 5.8440
2022-08-02 2022-06-30 13F Berkshire Hathaway B Class B common stock 084670207 14,755 -200 -1.34 4,028 -23.68 5.5776
2022-05-02 2022-03-31 13F Berkshire Hathaway B Class B common stock 084670207 14,955 -50 -0.33 5,278 17.65 6.3968
2022-02-11 2021-12-31 13F Berkshire Hathaway B Class B common stock 084670207 15,005 15,005 4,486 4.6647
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.