Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionKLCM Advisors, Inc.
Latest Disclosed Ownership6,552 shares
Latest Disclosed Value $ 3,139,718
KLCM Advisors, Inc. reports 3.05% increase in ownership of BRKB / Berkshire Hathaway Inc.

On April 30, 2026 - KLCM Advisors, Inc. filed a 13F-HR form disclosing ownership of 6,552 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $3,139,718 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 14, 2018 disclosing 0 shares of Berkshire Hathaway Inc.. This represents a change in shares of 3.05% 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)
2026-04-30 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,552 194 3.05 3,140 -1.75 0.2590
2026-02-04 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,358 -235 -3.56 3,196 -3.59 0.2744
2025-11-13 2025-09-30 13F Berkshire Hathaway Cl B COM 084670702 6,593 -333 -4.81 3,315 -1.49 0.3305
2025-08-04 2025-06-30 13F Berkshire Hathaway Cl B COM 084670702 6,926 -239 -3.34 3,364 -11.82 0.3577
2025-05-13 2025-03-31 13F Berkshire Hathaway Cl B COM 084670702 7,165 -5 -0.07 3,816 17.38 0.4464
2025-01-31 2024-12-31 13F Berkshire Hathaway Cl B COM 084670702 7,170 -152 -2.08 3,250 -3.56 0.3769
2024-11-07 2024-09-30 13F Berkshire Hathaway Cl B COM 084670702 7,322 180 2.52 3,370 16.01 0.4000
2024-08-14 2024-06-30 13F Berkshire Hathaway Cl B COM 084670702 7,142 49 0.69 2,905 -2.58 0.3589
2024-05-16 2024-03-31 13F Berkshire Hathaway Cl B COM 084670702 7,093 4,242 148.79 2,983 193.50 0.3830
2024-01-31 2023-12-31 13F Berkshire Hathaway Cl B COM 084670702 2,851 58 2.08 1,017 3.89 0.1570
2023-11-07 2023-09-30 13F Berkshire Hathaway Cl B COM 084670702 2,793 -200 -6.68 978 -4.12 0.1839
2023-08-09 2023-06-30 13F Berkshire Hathaway Cl B COM 084670702 2,993 23 0.77 1,021 11.23 0.1997
2023-05-11 2023-03-31 13F Berkshire Hathaway Cl B COM 084670702 2,970 -696 -18.99 917 -18.99 0.1819
2023-02-10 2022-12-31 13F Berkshire Hathaway Cl B COM 084670702 3,666 658 21.88 1,132 40.97 0.2301
2022-11-14 2022-09-30 13F Berkshire Hathaway Cl B COM 084670702 3,008 -20 -0.66 803 -2.90 0.1885
2022-08-04 2022-06-30 13F Berkshire Hathaway Cl B COM 084670702 3,028 -21 -0.69 827 -23.14 0.1840
2022-05-03 2022-03-31 13F Berkshire Hathaway Cl B COM 084670702 3,049 -37,339 -92.45 1,076 -91.09 0.2277
2022-01-31 2021-12-31 13F Berkshire Hathaway Cl B COM 084670702 40,388 -115 -0.28 12,076 9.24 2.6300
2021-11-16 2021-09-30 13F Berkshire Hathaway Cl B COM 084670702 40,503 -150 -0.37 11,055 -2.15 2.3747
2021-08-03 2021-06-30 13F Berkshire Hathaway Cl B COM 084670702 40,653 264 0.65 11,298 9.50 2.5001
2021-04-21 2021-03-31 13F Berkshire Hathaway Cl B COM 084670702 40,389 201 0.50 10,318 10.73 2.3404
2021-01-26 2020-12-31 13F Berkshire Hathaway Cl B COM 084670702 40,188 11,654 40.84 9,318 53.36 2.3129
2020-11-03 2020-09-30 13F Berkshire Hathaway Cl B COM 084670702 28,534 24,980 702.87 6,076 858.36 1.7692
2020-07-27 2020-06-30 13F Berkshire Hathaway Cl B COM 084670702 3,554 -50 -1.39 634 -3.79 0.1803
2020-05-13 2020-03-31 13F Berkshire Hathaway Cl B COM 084670702 3,604 5 0.14 659 -19.14 0.2087
2020-02-04 2019-12-31 13F Berkshire Hathaway Cl B COM 084670702 3,599 -215 -5.64 815 2.77 0.1808
2019-11-12 2019-09-30 13F/A-2 Berkshire Hathaway Cl B COM 084670702 3,814 -100 -2.55 793 -4.92 0.2021
2019-11-04 2019-09-30 13F/A-1 Berkshire Hathaway Cl B COM 084670702 3,814 0 793 0.2172
2019-11-01 2019-09-30 13F Berkshire Hathaway Cl B COM 084670702 3,814 793
2019-08-15 2019-06-30 13F Berkshire Hathaway Cl B COM 084670702 3,914 -650 -14.24 834 -9.05 0.2053
2019-05-14 2019-03-31 13F Berkshire Hathaway Cl B COM 084670702 4,564 -200 -4.20 917 -5.76 0.2255
2019-02-14 2018-12-31 13F Berkshire Hathaway Cl B COM 084670702 4,764 0 0.00 973 -4.61 0.2850
2018-11-14 2018-09-30 13F Berkshire Hathaway Cl B COM 084670702 4,764 -712 -13.00 1,020 -0.20 0.2508
2018-08-09 2018-06-30 13F Berkshire Hathaway Cl B COM 084670702 5,476 7 0.13 1,022 -6.32 0.2694
2018-05-10 2018-03-31 13F Berkshire Hathaway Cl B COM 084670702 5,469 1,455 36.25 1,091 37.06 0.2959
2018-02-15 2017-12-31 13F Berkshire Hathaway Cl B COM 084670702 4,014 -495 -10.98 796 -3.75 0.1955
2017-11-14 2017-09-30 13F Berkshire Hathaway Cl B COM 084670702 4,509 882 24.32 827 34.69 0.2160
2017-08-15 2017-06-30 13F Berkshire Hathaway Cl B COM 084670702 3,627 90 2.54 614 4.07 0.1676
2017-05-09 2017-03-31 13F Berkshire Hathaway Cl B COM 084670702 3,537 242 7.34 590 9.87 0.1665
2017-02-13 2016-12-31 13F Berkshire Hathaway Cl B COM 084670702 3,295 624 23.36 537 39.12 0.1580
2016-11-09 2016-09-30 13F Berkshire Hathaway Cl B COM 084670702 2,671 165 6.58 386 6.34 0.1229
2016-08-08 2016-06-30 13F Berkshire Hathaway Cl B COM 084670702 2,506 -60 -2.34 363 -0.27 0.1255
2016-04-27 2016-03-31 13F Berkshire Hathaway Cl B COM 084670702 2,566 0 0.00 364 7.37 0.1264
2016-02-11 2015-12-31 13F Berkshire Hathaway Cl B COM 084670702 2,566 0 0.00 339 1.19 0.1224
2015-11-12 2015-09-30 13F Berkshire Hathaway Cl B Com 084670702 2,566 -3,325 -56.44 335 -58.23 0.1186
2015-08-24 2015-06-30 13F Berkshire Hathaway Cl B Com 084670702 5,891 3,470 143.33 802 129.80 0.2023
2015-05-13 2015-03-31 13F Berkshire Hathaway Cl B Com 084670702 2,421 2,421 349 0.0969
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.