Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionMagellan Asset Management Ltd
ManagerHamish Douglass
Latest Disclosed Ownership332,614 shares
Latest Disclosed Value $ 159,388,629
Magellan Asset Management Ltd reports 182.24% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 11, 2026 - Magellan Asset Management Ltd filed a 13F-HR form disclosing ownership of 332,614 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $159,388,629 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 117,846 shares of Berkshire Hathaway Inc.. This represents a change in shares of 182.24% 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)
2026-05-11 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 332,614 214,768 182.24 159,389 169.08 2.0679
2026-02-10 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 117,846 -546 -0.46 59,235 -0.48 0.7200
2025-11-10 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 118,392 36,616 44.78 59,520 49.83 0.7049
2025-08-07 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 81,776 8,646 11.82 39,724 2.00 0.4541
2025-05-12 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 73,130 -5,003 -6.40 38,948 9.97 0.4735
2025-02-12 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 78,133 6,167 8.57 35,416 6.92 0.3891
2024-11-14 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 71,966 -30,506 -29.77 33,123 -20.54 0.3298
2024-08-13 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 102,472 0 0.00 41,686 -3.26 0.3968
2024-05-14 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 102,472 26,493 34.87 43,092 59.02 0.4116
2024-02-13 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 75,979 0 0.00 27,099 1.81 0.2700
2023-11-13 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 75,979 0 0.00 26,615 2.73 0.2829
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 75,979 0 0.00 25,909 10.43 0.2306
2023-05-12 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 75,979 7,565 11.06 23,460 11.01 0.2003
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 68,414 -10,102 -12.87 21,133 0.80 0.1808
2022-11-10 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 78,516 0 0.00 20,965 -2.20 0.1465
2022-08-12 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 78,516 9,017 12.97 21,436 -12.60 0.1170
2022-05-13 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 69,499 68,407 6,264.38 24,527 7,400.61 0.0950
2022-02-11 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,092 559 104.88 327 125.52 0.0008
2021-11-04 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 533 350 191.26 145 184.31 0.0003
2021-08-12 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 183 0 0.00 51 8.51 0.0001
2021-05-13 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 183 0 0.00 47 11.90 0.0001
2021-02-11 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 183 0 0.00 42 7.69 0.0001
2020-11-12 2020-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 183 0 0.00 39 18.18 0.0001
2020-08-14 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 183 0 0.00 33 0.00 0.0001
2020-05-14 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 183 12 7.02 33 -15.38 0.0001
2020-02-13 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 171 0 0.00 39 8.33 0.0001
2019-11-13 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 171 -4,794,835 -100.00 36 -100.00 0.0001
2019-08-13 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,795,006 123,359 2.64 1,022,151 8.91 2.9419
2019-05-14 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,671,647 96,046 2.10 938,487 0.45 2.9783
2019-03-11 2018-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,575,601 4,575,601 934,246 3.4330
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.