Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionMADDEN SECURITIES Corp
Latest Disclosed Ownership798 shares
Latest Disclosed Value $ 382,444
MADDEN SECURITIES Corp reports 12.71% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 5, 2026 - MADDEN SECURITIES Corp filed a 13F-HR form disclosing ownership of 798 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $382,444 USD as of March 31, 2026.

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)
2026-05-05 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 798 90 12.71 382 7.61 0.1150
2026-02-04 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 708 24 3.51 356 3.50 0.1085
2025-10-24 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 684 20 3.01 344 6.52 0.1052
2025-07-23 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 664 -550 -45.30 323 -50.15 0.1082
2025-04-15 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,214 -10 -0.82 647 16.61 0.2509
2025-01-29 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,224 0 0.00 555 -1.60 0.2220
2024-10-10 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,224 -150 -10.92 563 0.90 0.2429
2024-07-11 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,374 0 0.00 559 -3.29 0.2475
2024-04-10 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,374 274 24.91 578 47.19 0.2668
2024-02-13 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,100 0 0.00 392 1.82 0.2077
2023-10-10 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,100 -2 -0.18 385 2.67 0.2177
2023-07-06 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,102 0 0.00 376 10.29 0.1923
2023-04-21 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,102 0 0.00 340 0.00 0.1801
2023-01-11 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,102 0 0.00 340 15.65 0.1795
2022-10-13 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,102 175 18.88 294 16.21 0.1776
2022-08-04 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 927 -685 -42.49 253 -55.54 0.1388
2022-04-28 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,612 815 102.26 569 139.08 0.2565
2022-01-14 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 797 -950 -54.38 238 -50.10 0.1115
2021-10-14 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,747 -815 -31.81 477 -33.01 0.2581
2021-07-14 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,562 0 0.00 712 8.70 0.3720
2021-04-30 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,562 -1,253 -32.84 655 -25.99 0.3830
2021-01-12 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,815 -385 -9.17 885 -1.01 0.5696
2020-10-08 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,200 -6,881 -62.10 894 -54.80 0.6645
2020-07-14 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,081 7,385 199.81 1,978 136.60 1.7618
2020-02-25 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,696 3,696 836 0.8388
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.