Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionAlerus Financial Na
Latest Disclosed Ownership23,107 shares
Latest Disclosed Value $ 11,072,874
Alerus Financial Na reports 4.55% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 12, 2026 - Alerus Financial Na filed a 13F-HR form disclosing ownership of 23,107 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $11,072,874 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 22,101 shares of Berkshire Hathaway Inc.. This represents a change in shares of 4.55% 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)
2026-05-12 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,107 1,006 4.55 11,073 -0.33 0.5470
2026-02-13 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,101 820 3.85 11,109 3.84 0.5434
2025-11-10 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,281 121 0.57 10,699 4.09 0.5443
2025-08-13 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,160 566 2.75 10,279 -6.28 0.7402
2025-05-13 2025-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 20,594 -4,133 -16.71 10,968 -2.15 0.8781
2025-02-12 2024-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 24,727 -7,401 -23.04 11,208 -24.20 0.8583
2024-11-14 2024-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 32,128 -1,489 -4.43 14,787 8.13 1.0853
2024-08-08 2024-06-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 33,617 -574 -1.68 13,675 -4.89 1.0221
2024-05-13 2024-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 34,191 -829 -2.37 14,378 15.12 1.0859
2024-02-12 2023-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 35,020 -677 -1.90 12,490 -0.11 1.0193
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 35,697 -4,884 -12.04 12,505 -9.64 1.1074
2023-08-14 2023-06-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 40,581 -493 -1.20 13,838 9.12 1.1715
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 41,074 6,584 19.09 12,682 19.04 1.1277
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 34,490 32,360 1,519.25 10,654 1,772.41 0.9756
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,130 -56 -2.56 569 -4.69 0.0566
2022-08-12 2022-06-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,186 -637 -22.56 597 -40.06 0.0552
2022-05-13 2022-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,823 -246 -8.02 996 8.50 0.0849
2022-02-14 2021-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 3,069 -37 -1.19 918 8.25 0.0748
2021-11-12 2021-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 3,106 -79 -2.48 848 -4.18 0.0772
2021-08-11 2021-06-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 3,185 -430 -11.89 885 -4.22 0.0892
2021-05-13 2021-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 3,615 -12,688 -77.83 924 -75.56 0.0974
2021-02-12 2020-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 16,303 -3,122 -16.07 3,780 -8.61 0.3840
2020-11-13 2020-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 19,425 -22,038 -53.15 4,136 -44.12 0.4656
2020-08-14 2020-06-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 41,463 -11,398 -21.56 7,402 -23.41 0.8704
2020-05-12 2020-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 52,861 -465 -0.87 9,665 -19.98 1.3372
2020-02-11 2019-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 53,326 1,006 1.92 12,078 10.97 1.3759
2019-11-13 2019-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 52,320 6,784 14.90 10,884 12.13 1.4078
2019-08-13 2019-06-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 45,536 -1,946 -4.10 9,707 1.76 1.3095
2019-05-06 2019-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 47,482 1,935 4.25 9,539 2.58 1.3294
2019-02-04 2018-12-31 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 45,547 -3,802 -7.70 9,299 -11.99 1.4254
2018-11-13 2018-09-30 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 49,349 -1,486 -2.92 10,566 11.35 1.4452
2018-08-08 2018-06-30 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 50,835 3,173 6.66 9,489 -0.20 1.3470
2018-05-09 2018-03-31 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 47,662 588 1.25 9,508 1.90 1.3653
2018-02-14 2017-12-31 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 47,074 -1,609 -3.31 9,331 4.55 1.3222
2017-11-13 2017-09-30 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 48,683 -443 -0.90 8,925 7.26 1.3001
2017-08-09 2017-06-30 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 49,126 -1,014 -2.02 8,321 -0.44 1.2339
2017-04-27 2017-03-31 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 50,140 -692 -1.36 8,358 0.88 1.2818
2017-02-13 2016-12-31 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 50,832 3,970 8.47 8,285 22.38 1.3386
2016-11-10 2016-09-30 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 46,862 852 1.85 6,770 1.62 1.0949
2016-08-11 2016-06-30 13F BERKSHIRE HATHAWAY CALL B NEW 084670702 46,010 46,010 6,662 1.1145
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.