Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionCwm, Llc
Latest Disclosed Ownership394,551 shares
Latest Disclosed Value $ 189,068,781
Cwm, Llc reports 2.53% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 14, 2026 - Cwm, Llc filed a 13F-HR form disclosing ownership of 394,551 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $189,068,781 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 384,825 shares of Berkshire Hathaway Inc.. This represents a change in shares of 2.53% 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)
2026-05-14 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 394,551 9,726 2.53 189,069 97,862.69 0.4916
2026-01-26 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 384,825 11,445 3.07 193 3.21 0.5241
2025-10-15 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 373,380 53,629 16.77 188 20.65 0.5645
2025-07-25 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 319,751 10,544 3.41 155 -5.49 0.5477
2025-05-01 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 309,207 43,798 16.50 165 36.67 0.6567
2025-02-04 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 265,409 7,073 2.74 120 1.69 0.4993
2024-10-08 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 258,336 6 0.00 119 12.38 0.5114
2024-07-10 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 258,330 4,148 1.63 105 -0.94 0.4954
2024-04-05 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 254,182 11,454 4.72 107 23.26 0.5197
2024-02-01 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 242,728 -1,375 -0.56 87 1.18 0.4654
2023-10-11 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 244,103 1,593 0.66 86 3.66 0.5240
2023-08-03 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 242,510 497 0.21 83 10.81 0.5110
2023-05-01 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 242,013 9,401 4.04 75 4.23 0.5049
2023-02-01 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 232,612 -138 -0.06 72 -99.89 0.5292
2022-10-27 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 232,750 8,211 3.66 62,149 1.38 0.4937
2022-07-28 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 224,539 1,086 0.49 61,304 -22.26 0.4749
2022-04-21 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 223,453 53,701 31.63 78,859 55.37 0.5594
2022-01-31 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 169,752 5,012 3.04 50,756 10.86 0.3573
2021-09-15 2021-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2021-07-29 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 45,785 0.3649
2021-09-15 2021-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2021-04-27 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 167,362 2,622 42,756 0.3761
2021-09-15 2020-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2021-01-27 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 204,706 39,966 47,465 0.4448
2021-09-15 2020-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2020-10-19 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 202,853 38,113 43,196 0.4802
2021-09-15 2020-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2020-07-22 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 236,122 71,382 42,150 0.4999
2021-09-15 2020-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2020-04-28 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 203,157 38,417 37,143 0.5530
2021-09-14 2019-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2020-01-27 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 187,269 22,529 42,416 0.5419
2021-09-14 2019-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2019-10-22 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 163,162 -1,578 33,941 0.4941
2021-09-14 2019-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 0 0.00 45,785 0.00 0.3649
2019-07-31 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 132,794 -31,946 28,308 0.4682
2021-09-02 2019-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 164,740 91,496 124.92 45,785 206.15 0.3649
2019-04-22 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 96,547 23,303 19,395 0.3890
2019-01-25 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 73,244 29,558 67.66 14,955 59.88 0.3734
2018-10-29 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 43,686 14,592 50.15 9,354 72.27 0.2388
2018-07-31 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 29,094 5,103 21.27 5,430 13.46 0.1787
2018-04-26 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,991 1,000 4.35 4,786 5.03 0.1902
2018-01-16 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,991 -397 -1.70 4,557 6.30 0.2024
2017-10-16 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,388 423 1.84 4,287 10.21 0.2027
2017-07-17 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,965 3,676 19.06 3,890 21.00 0.1994
2017-04-17 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,289 -1,694 -8.07 3,215 -5.99 0.1818
2017-01-19 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,983 1,441 7.37 3,420 21.15 0.2096
2016-10-17 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,542 -2,538 -11.49 2,823 -11.70 0.1949
2016-07-21 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,080 1,630 7.97 3,197 10.20 0.2332
2016-04-18 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,450 2,253 12.38 2,901 20.72 0.2547
2016-02-01 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,197 -2,043 -10.09 2,403 -8.94 0.2348
2015-10-30 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,240 -184 -0.90 2,639 -5.07 0.2657
2015-07-09 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,424 -1,025 -4.78 2,780 -10.21 0.2667
2015-04-30 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 21,449 913 4.45 3,096 0.42 0.3135
2015-02-12 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,536 4,186 25.60 3,083 36.48 0.3742
2014-11-14 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,350 -1,138 -6.51 2,259 2.08 0.3280
2014-08-14 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,488 -1,446 -7.64 2,213 -24.42 0.3960
2014-05-16 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 18,934 -1,302 -6.43 2,928 22.05 0.3991
2014-02-14 2013-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,236 660 3.37 2,399 7.97 0.3742
2013-11-14 2013-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,576 19,576 2,222 0.5830
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.