Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionNorthwestern Mutual Wealth Management Co
Latest Disclosed Ownership441,801 shares
Latest Disclosed Value $ 211,710,979
Northwestern Mutual Wealth Management Co reports 1.25% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 7, 2026 - Northwestern Mutual Wealth Management Co filed a 13F-HR form disclosing ownership of 441,801 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $211,710,979 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 10, 2026 disclosing 447,406 shares of Berkshire Hathaway Inc.. This represents a change in shares of -1.25% 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)
2026-05-07 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 441,801 -5,605 -1.25 211,711 -5.86 0.1303
2026-02-10 2025-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 447,406 -23,064 -4.90 224,888 -4.92 0.1422
2026-02-05 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 209,115 -261,355 19,606 0.0124
2025-11-14 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 470,470 -4,316 -0.91 236,524 2.55 0.1577
2025-08-13 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 474,786 4,152 0.88 230,636 -7.98 0.1681
2025-05-14 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 470,634 -85,634 -15.39 250,649 -0.59 0.2050
2025-02-11 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 556,268 14,783 2.73 252,145 1.17 0.2127
2024-11-12 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 541,485 16,999 3.24 249,223 16.81 0.2214
2024-08-16 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 524,486 3,528 0.68 213,358 -2.61 0.2105
2024-05-15 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 520,958 2,406 0.46 219,070 18.45 0.2251
2024-02-13 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 518,552 18,621 3.72 184,945 5.61 0.2085
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 499,931 10,808 2.21 175,124 5.00 0.2277
2023-08-14 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 489,123 34,441 7.57 166,791 18.80 0.2156
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 454,682 96,053 26.78 140,392 26.73 0.1960
2023-02-21 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 358,629 -3,105 -0.86 110,779 14.69 0.1677
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 361,734 19,670 5.75 96,590 3.43 0.1685
2022-08-04 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 342,064 24,612 7.75 93,389 -16.64 0.1604
2022-05-09 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 317,452 1,414 0.45 112,032 18.56 0.1796
2022-02-03 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 316,038 -30,530 -8.81 94,494 -0.10 0.1543
2021-11-15 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 346,568 11,500 3.43 94,592 1.58 0.1729
2021-08-13 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 335,068 8,463 2.59 93,122 11.61 0.1769
2021-05-14 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 326,605 9,286 2.93 83,437 13.40 0.1772
2021-02-12 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 317,319 11,132 3.64 73,576 12.85 0.1700
2020-11-13 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 306,187 -22,741 -6.91 65,199 11.04 0.1755
2020-08-14 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 328,928 -108,987 -24.89 58,717 -26.66 0.1811
2020-05-08 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 437,915 18,213 4.34 80,063 -15.78 0.3091
2020-02-13 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 419,702 -17,257 -3.95 95,063 4.58 0.3240
2019-11-12 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 436,959 4,851 1.12 90,896 -1.32 0.3453
2019-08-12 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 432,108 9,398 2.22 92,112 8.47 0.3702
2019-05-10 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 422,710 15,589 3.83 84,918 2.16 0.3717
2019-02-12 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 407,121 27,731 7.31 83,126 2.33 0.4164
2018-11-01 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 379,390 16,534 4.56 81,230 19.94 0.4099
2018-08-10 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 362,856 20,386 5.95 67,727 -0.86 0.3794
2018-05-14 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 342,470 8,496 2.54 68,316 3.20 0.4145
2018-01-31 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 333,974 12,962 4.04 66,200 12.49 0.4218
2017-11-07 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 321,012 43,938 15.86 58,849 25.40 0.4210
2017-08-10 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 277,074 37,394 15.60 46,928 17.47 0.3768
2017-05-09 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 239,680 6,697 2.87 39,949 5.21 0.3633
2017-02-15 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 232,983 180,721 345.80 37,971 402.93 0.4120
2017-02-23 2016-09-30 13F/A-2 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 52,262 -143,528 -73.31 7,550 -73.37 0.4982
2016-11-14 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 152,096 21,975
2016-08-29 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 195,790 46,647 31.28 28,349 33.97 0.4062
2016-05-16 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 149,143 8,596 6.12 21,161 14.02 0.3427
2016-02-16 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 140,547 12,031 9.36 18,559 10.74 0.3703
2015-11-16 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 128,516 18,062 16.35 16,759 11.47 0.3991
2015-09-30 2015-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 110,454 13,861 14.35 15,034 7.85 0.3900
2015-08-14 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 101,858 14,622
2015-05-15 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 96,593 10,184 11.79 13,940 7.45 0.3899
2015-02-13 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 86,409 2,231 2.65 12,974 11.57 0.4004
2014-11-14 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 84,178 14,022 19.99 11,629 30.97 0.4066
2014-08-05 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 70,156 -3,277 -4.46 8,879 -3.25 0.3465
2014-05-15 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 73,433 -88 -0.12 9,177 5.28 0.3839
2014-02-14 2013-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 73,521 -9,553 -11.50 8,717 -7.55 0.3961
2013-11-14 2013-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 83,074 17,680 27.04 9,429 28.83 0.4959
2013-08-21 2013-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 65,394 65,394 7,319 0.4375
2013-08-14 2013-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 385,086 43,099 0.4739
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.