Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionRMB Capital Management, LLC
Latest Disclosed Ownership105,499 shares
Latest Disclosed Value $ 50,555,179
RMB Capital Management, LLC reports 8.31% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 15, 2026 - RMB Capital Management, LLC filed a 13F-HR form disclosing ownership of 105,499 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $50,555,179 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 97,402 shares of Berkshire Hathaway Inc.. This represents a change in shares of 8.31% 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)
2026-05-15 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 105,499 8,097 8.31 50,555 3.26 0.6809
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 97,402 4,770 5.15 48,959 5.13 0.8483
2025-11-13 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 92,632 1,656 1.82 46,570 5.38 0.8544
2025-08-14 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 90,976 38,594 73.68 44,193 58.41 0.8389
2025-05-15 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 52,382 9,401 21.87 27,898 43.19 0.6880
2025-02-13 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 42,981 25,201 141.74 19,482 138.08 0.4489
2024-11-06 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 17,780 2,094 13.35 8,183 28.24 0.1858
2024-08-13 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,686 -804 -4.88 6,381 -7.98 0.1530
2024-05-15 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,490 3,395 25.93 6,934 48.48 0.1589
2024-02-14 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,095 412 3.25 4,670 5.13 0.1426
2023-11-13 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,683 -873 -6.44 4,443 -3.89 0.1520
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,556 56 0.41 4,623 10.89 0.1518
2023-05-11 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,500 114 0.85 4,168 0.82 0.1456
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,386 218 1.66 4,135 17.58 0.1471
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,168 -1,884 -12.52 3,516 -14.43 0.1310
2022-08-16 2022-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,052 -1 -0.01 4,109 -22.65 0.1414
2022-08-01 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,052 -1 4,109 0.1529
2022-05-06 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,053 417 2.85 5,312 21.39 0.1679
2022-01-26 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,636 530 3.76 4,376 13.66 0.1320
2021-10-20 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,106 -2 -0.01 3,850 -1.81 0.1264
2021-08-13 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,108 189 1.36 3,921 10.26 0.1312
2021-05-12 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,919 -965 -6.48 3,556 3.01 0.1315
2021-02-11 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,884 -974 -6.14 3,452 2.22 0.1262
2020-11-10 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 15,858 -358 -2.21 3,377 16.65 0.1461
2020-08-05 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,216 -545 -3.25 2,895 -5.55 0.1274
2020-05-11 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 16,761 -3,105 -15.63 3,065 -31.89 0.1455
2020-02-13 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 19,866 -1,118 -5.33 4,500 3.09 0.1251
2019-11-12 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 20,984 -3,089 -12.83 4,365 -14.95 0.1147
2019-08-13 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,073 1,504 6.66 5,132 13.21 0.1298
2019-05-15 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 22,569 -5,801 -20.45 4,533 -21.74 0.1146
2019-02-13 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 28,370 3,724 15.11 5,792 9.76 0.1479
2018-11-14 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,646 617 2.57 5,277 17.66 0.1267
2018-08-13 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,029 781 3.36 4,485 -3.28 0.1067
2018-05-14 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 23,248 -907 -3.75 4,637 -3.13 0.1186
2018-02-14 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,155 -419 -1.71 4,787 6.26 0.1243
2017-11-14 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 24,574 -23,324 -48.70 4,505 -44.46 0.1164
2017-08-14 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 47,898 8,232 20.75 8,112 22.70 0.2321
2017-05-12 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 39,666 -11,530 -22.52 6,611 -20.77 0.2734
2017-03-10 2016-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 51,196 -112 -0.22 8,344 12.57 0.4488
2017-02-13 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 51,196 8,344
2016-11-17 2016-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 51,308 23,379 83.71 7,412 83.33 0.4029
2016-11-02 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 51,308 7,412
2016-08-03 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,929 20,094 256.46 4,043 263.91 0.2112
2016-05-09 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,835 2,480 46.31 1,111 57.14 0.0723
2016-02-12 2015-12-31 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 5,355 -32 -0.59 707 0.57 0.0326
2015-11-12 2015-09-30 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 5,387 -94 -1.72 703 -5.76 0.0467
2015-08-13 2015-06-30 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 5,481 504 10.13 746 3.90 0.0486
2015-05-12 2015-03-31 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 4,977 -255 -4.87 718 -8.54 0.0433
2015-02-11 2014-12-31 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 5,232 -94 -1.76 785 6.66 0.0478
2014-11-13 2014-09-30 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 5,326 56 1.06 736 10.34 0.0450
2014-08-11 2014-06-30 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 5,270 416 8.57 667 9.88 0.0422
2014-05-12 2014-03-31 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 4,854 -502 -9.37 607 -4.56 0.0418
2014-02-10 2013-12-31 13F BERKSHIRE HATHAWAY INC DE CL COM 084670702 5,356 1,242 30.19 636 36.19 0.0441
2013-11-14 2013-09-30 13F BERKSHIRE HATHAWAY B NEW CLASS COM 084670702 4,114 -814 -16.52 467 -15.40 0.0335
2013-08-14 2013-06-30 13F/A-1 BERKSHIRE HATHAWAY B NEW CLASS COM 084670702 4,928 4,928 552 0.0418
2013-08-12 2013-06-30 13F BERKSHIRE HATHAWAY B NEWCLASS COM 084670702 4,928 552 0.0424
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.