Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionQuantinno Capital Management LP
Latest Disclosed Ownership1,232,379 shares
Latest Disclosed Value $ 590,556,467
Quantinno Capital Management LP reports 30.50% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 15, 2026 - Quantinno Capital Management LP filed a 13F-HR form disclosing ownership of 1,232,379 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $590,556,467 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 944,384 shares of Berkshire Hathaway Inc.. This represents a change in shares of 30.50% 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)
2026-05-15 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,232,379 287,995 30.50 590,556 24.41 0.9855
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 944,384 185,837 24.50 474,695 24.48 0.9533
2025-11-14 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 758,547 185,395 32.35 381,352 36.97 1.0404
2025-08-14 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 573,152 141,029 32.64 278,421 20.98 1.2024
2025-05-12 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 432,123 181,821 72.64 230,140 102.84 1.4988
2025-02-14 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 250,302 51,030 25.61 113,457 23.70 1.1157
2024-11-14 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 199,272 39,231 24.51 91,717 40.88 1.1923
2024-08-14 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 160,041 13,388 9.13 65,105 5.57 1.1708
2024-05-14 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 146,653 63,179 75.69 61,671 107.14 1.3405
2024-02-14 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 83,474 7,746 10.23 29,772 12.23 1.0421
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 75,728 16,474 27.80 26,528 31.29 1.2076
2023-08-04 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 59,254 5,196 9.61 20,206 21.06 1.1541
2023-05-03 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 54,058 6,747 14.26 16,691 14.21 1.1038
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 47,311 8,155 20.83 14,614 39.78 1.0901
2022-11-08 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 39,156 12,095 44.70 10,455 41.51 1.3462
2022-08-15 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,061 4,937 22.32 7,388 -5.38 1.0658
2022-05-12 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,124 1,255 6.01 7,808 25.13 1.1907
2022-02-14 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,869 20,869 6,240 1.1297
2020-02-14 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 0 -1,396 -100.00 0 -100.00
2019-11-14 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,396 0 0.00 290 -2.68 0.1953
2019-08-14 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,396 -1,253 -47.30 298 -43.98 0.1749
2019-05-14 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,649 -1,100 -29.34 532 -30.46 0.3408
2019-02-14 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,749 3,749 765 0.6230
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.