Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionKBC Group NV
Latest Disclosed Ownership490,547 shares
Latest Disclosed Value $ 235,069
KBC Group NV reports 286.46% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 490,547 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $235,069 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 126,934 shares of Berkshire Hathaway Inc.. This represents a change in shares of 286.46% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-07 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 490,547 363,613 286.46 235 273.02 0.3032
2026-01-26 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 126,934 4,580 3.74 64 3.28 0.1455
2026-01-20 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 122,354 -131,503 -51.80 62 -50.41 0.1475
2025-08-08 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 253,857 92,779 57.60 123 44.71 0.3331
2025-04-25 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 161,078 -92,785 -36.55 86 -26.09 0.2663
2025-01-22 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 253,863 -8,703 -3.31 115 -4.17 0.3170
2024-11-06 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 262,566 155,724 145.75 121 179.07 0.3651
2024-07-17 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 106,842 2,712 2.60 43 0.00 0.1313
2024-05-08 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 104,130 -183,637 -63.81 44 -57.84 0.1391
2024-02-13 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 287,767 10,785 3.89 103 5.15 0.3639
2024-02-15 2023-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 276,982 -54,610 -16.47 97 -14.16 0.3960
2023-11-22 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 330,210 0 113 0.4689
2024-02-15 2023-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 331,592 -22,019 -6.23 113 3.67 0.4650
2023-07-28 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 330,210 326,410 113 0.4689
2024-02-14 2023-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 353,611 -4,060 -1.14 109 -0.91 0.4635
2023-05-04 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,800 -297,564 1 0.0055
2024-02-14 2022-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 357,671 54,908 18.14 110 37.50 0.5360
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 301,364 -1,399 80 0.0004
2024-02-15 2022-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 302,763 2,502 0.83 81 -1.23 0.4202
2022-11-08 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 301,364 1,103 80,471 0.4206
2024-02-14 2022-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 300,261 -9,790 -3.16 82 -25.69 0.4089
2022-07-26 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 298,973 -11,078 81,626 0.4108
2024-02-14 2022-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 310,051 -46,043 -12.93 109 2.83 0.4326
2022-05-06 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 310,051 -46,043 109,420 0.4040
2024-02-14 2021-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 356,094 -118,574 -24.98 106 -99.92 0.3512
2022-02-03 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 356,094 -118,574 106,472 0.3335
2021-11-10 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 474,668 487 0.10 129,556 -1.69 0.4750
2022-02-15 2021-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 474,181 119,623 33.74 131,785 45.49 0.4751
2021-08-11 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 474,181 119,623 131,785 0.4751
2022-02-14 2021-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 354,558 -15,791 -4.26 90,579 -88.92 0.3668
2021-04-26 2021-03-31 13F BERKSHIRE HATHAWAY INC-CL B CL B NEW 084670702 354,558 -15,791 90,579 0.3668
2022-02-14 2020-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 370,349 49,738 15.51 817,409 1,097.30 0.3846
2021-02-10 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 370,349 49,738 85,873 0.3952
2022-02-14 2020-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 320,611 -80,171 -20.00 68,271 -4.57 0.4022
2020-10-28 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 320,611 -80,171 68,271 0.4039
2022-02-14 2020-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 400,782 172,615 75.65 71,543 71.50 0.4728
2020-08-10 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 400,782 172,615 71,543 0.4787
2020-05-04 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 228,167 -27,666 -10.81 41,716 -28.01 0.3491
2020-02-11 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 255,833 53,858 26.67 57,946 37.92 0.3664
2019-11-07 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 201,975 -81,098 -28.65 42,015 -30.37 0.3081
2019-08-08 2019-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 283,073 -35,977 -11.28 60,343 -5.85 0.4672
2019-07-30 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 283,073 -133,752 60,343
2019-08-07 2019-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 319,050 29,124 10.05 64,094 8.27 0.5280
2019-05-10 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 319,050 29,124 64,094
2019-01-31 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 289,926 -124,422 -30.03 59,197 -33.27 0.6594
2018-11-14 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 414,348 7,147 1.76 88,716 16.73 0.6711
2018-08-03 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 407,201 54,544 15.47 76,004 8.04 0.6617
2018-08-03 2018-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 352,657 -66,734 -15.91 70,348 -15.38 0.6508
2018-05-09 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 352,657 -66,734 70,348
2018-08-03 2017-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 419,391 -1,108 -0.26 83,132 7.84 0.7109
2018-02-07 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 419,391 -1,108 83,132
2017-11-13 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 420,499 -1,215 -0.29 77,086 7.92 0.6997
2017-08-04 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 421,714 61,114 16.95 71,426 18.84 0.6903
2017-05-10 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 360,600 74,519 26.05 60,105 28.91 0.5426
2017-02-16 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 286,081 84,441 41.88 46,626 60.06 0.4622
2016-11-03 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 201,640 38,417 23.54 29,131 23.26 0.3441
2016-08-03 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 163,223 16,309 11.10 23,633 13.38 0.3381
2016-05-11 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 146,914 65,603 80.68 20,844 94.15 0.3463
2016-02-11 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 81,311 -1,934 -2.32 10,736 -1.10 0.1978
2015-11-12 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 83,245 -20,375 -19.66 10,855 -23.03 0.2184
2015-12-16 2015-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 103,620 -38,505 -27.09 14,103 -31.25 0.1813
2015-07-31 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 103,620 14,103
2015-12-16 2015-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 142,125 -4,065 -2.78 20,512 -6.56 0.2606
2015-04-30 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 142,125 20,512
2015-12-15 2014-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 146,190 138,345 1,763.48 21,951 1,925.00 0.2614
2015-02-12 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 146,190 21,951
2014-10-16 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,845 -260,086 -97.07 1,084 -96.80 0.0378
2014-08-01 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 267,931 174,575 187.00 33,909 190.64 0.3874
2014-04-30 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 93,356 -9,584 -9.31 11,667 -4.40 0.1842
2014-01-21 2013-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 102,940 -6,696 -6.11 12,204 -1.93 0.1846
2013-11-06 2013-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 109,636 13,771 14.36 12,444 15.98 0.2003
2013-07-29 2013-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 95,865 95,865 10,729 0.1990
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.