Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionAMF Pensionsforsakring AB
Latest Disclosed Ownership412,511 shares
Latest Disclosed Value $ 197,675,271
AMF Pensionsforsakring AB reports 2.00% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 4, 2026 - AMF Pensionsforsakring AB filed a 13F-HR form disclosing ownership of 412,511 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $197,675,271 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)
2026-05-04 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 412,511 8,096 2.00 197,675 -2.76 1.3105
2026-02-06 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 404,415 -209 -0.05 203,279 -0.07 1.2595
2025-11-14 2025-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 404,624 -3,758 -0.92 203,421 2.54 1.2890
2025-10-31 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 235,850 -172,532 118,571 1.2801
2025-07-22 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 408,382 163,166 66.54 198,380 51.90 1.3201
2025-05-12 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 245,216 48,590 24.71 130,597 46.53 0.9641
2025-02-07 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 196,626 27,280 16.11 89,127 14.35 0.6334
2024-10-28 2024-09-30 13F/A-24 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 169,346 0 0.00 77,943 13.14 0.5573
2024-10-03 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 169,346 0 77,943 0.5573
2024-07-10 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 169,346 16,374 10.70 68,890 7.09 0.5137
2024-04-16 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 152,972 56,993 59.38 64,328 87.92 0.4875
2024-01-30 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 95,979 -667,268 -87.42 34,232 -87.20 0.2924
2023-10-26 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 763,247 -8,490 -1.10 267,365 1.60 2.5987
2023-07-05 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 771,737 94,613 13.97 263,162 25.87 2.4224
2023-04-24 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 677,124 -29,897 -4.23 209,076 -4.27 2.1397
2023-01-26 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 707,021 -50,773 -6.70 218,399 7.93 2.5009
2022-10-26 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 757,794 159,543 26.67 202,346 23.88 2.3940
2022-07-26 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 598,251 -248,590 -29.35 163,334 -45.35 1.6033
2022-05-05 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 846,841 -63,019 -6.93 298,859 9.86 2.2104
2022-02-08 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 909,860 909,860 272,048 1.8607
2020-08-13 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 0 -276,119 -100.00 0 -100.00
2020-04-14 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 276,119 4,841 1.78 50,483 -17.84 0.6415
2020-02-12 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 271,278 32,431 13.58 61,444 23.67 0.5869
2019-10-29 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 238,847 126,477 112.55 49,685 107.42 0.5092
2019-07-11 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 112,370 -307 -0.27 23,954 5.82 0.2322
2019-05-14 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 112,677 -8,398 -6.94 22,636 -8.43 0.2249
2019-01-30 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 121,075 -39,900 -24.79 24,721 -28.27 0.2710
2018-11-14 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 160,975 105,600 190.70 34,466 233.46 0.3147
2018-08-13 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 55,375 55,375 10,336 0.0997
2017-04-27 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 0 -94,008 -100.00 0 -100.00
2017-02-14 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 94,008 -15,900 -14.47 15,321 -3.51 0.1784
2016-11-14 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 109,908 -25,190 -18.65 15,878 -18.83 0.1991
2016-08-12 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 135,098 -750,550 -84.75 19,561 -84.43 0.2516
2016-05-12 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 885,648 88,493 11.10 125,656 19.38 1.6489
2016-02-16 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 797,155 -41,100 -4.90 105,256 -3.71 1.4789
2015-11-12 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 838,255 6,900 0.83 109,308 -3.40 1.6555
2015-08-13 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 831,355 -115,027 -12.15 113,156 -17.15 1.5697
2015-05-13 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 946,382 -85,451 -8.28 136,582 -11.84 1.7158
2015-02-13 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,031,833 1,031,833 154,930 1.9549
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.