Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership1,722 shares
Latest Disclosed Value $ 824,942
Renaissance Technologies Llc reports 99.32% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 1,722 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $824,942 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 252,188 shares of Berkshire Hathaway Inc.. This represents a change in shares of -99.32% 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 1,722 -250,466 -99.32 825 -99.35 0.0013
2026-02-12 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 252,188 249,133 8,154.93 126,757 8,147.04 0.1966
2025-11-13 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,055 -213 -6.52 1,538 -3.09 0.0020
2025-08-13 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,268 1,232 60.51 1,586 46.04 0.0021
2025-05-14 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,036 -234 -10.31 1,086 5.33 0.0016
2025-02-13 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,270 -220,245 -98.98 1,032 -98.99 0.0015
2024-11-13 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 222,515 221,217 17,042.91 102,414 19,296.40 0.1540
2024-08-09 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,298 -188,292 -99.32 528 568.35 0.0009
2024-05-13 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 189,590 155,744 460.15 80 690.00 0.1253
2023-05-12 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 33,846 32,600 2,616.37 10 0.0139
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,246 -478,454 -99.74 0 -100.00 0.0005
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 479,700 -1,311,300 -73.22 128,089 -73.80 0.1812
2022-08-12 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,791,000 1,718,500 2,370.34 488,979 1,811.12 0.5789
2022-05-13 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 72,500 -868,800 -92.30 25,586 -90.91 0.0300
2022-02-11 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 941,300 795,583 545.98 281,449 607.66 0.3501
2021-11-12 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 145,717 64,517 79.45 39,772 76.24 0.0514
2021-08-13 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 81,200 -363,700 -81.75 22,567 -80.14 0.0282
2021-05-13 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 444,900 -158,461 -26.26 113,659 -18.76 0.1414
2021-02-10 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 603,361 425,696 239.61 139,901 341.12 0.1519
2020-08-13 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 177,665 109,977 162.48 31,715 156.28 0.0274
2020-05-14 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 67,688 -15,212 -18.35 12,375 -28.24 0.0120
2019-11-13 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 82,900 -852,200 -91.13 17,245 -91.35 0.0146
2019-08-12 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 935,100 -401,800 -30.05 199,335 -25.78 0.1755
2019-05-14 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,336,900 1,260,700 1,654.46 268,570 1,822.61 0.2442
2017-11-13 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 76,200 -36,200 -32.21 13,969 -26.62 0.0164
2017-08-11 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 112,400 -239,000 -68.01 19,037 -67.50 0.0243
2017-05-12 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 351,400 -93,300 -20.98 58,571 -19.19 0.0818
2017-02-13 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 444,700 143,800 47.79 72,477 66.72 0.1147
2016-11-14 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 300,900 293,900 4,198.57 43,471 4,187.08 0.0768
2016-08-12 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,000 -1,700 -19.54 1,014 -17.83 0.0019
2016-05-13 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 8,700 -256,300 -96.72 1,234 -96.47 0.0023
2016-02-11 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 265,000 -241,800 -47.71 34,991 -47.05 0.0762
2015-11-12 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 506,800 -504,700 -49.90 66,087 -52.00 0.1577
2015-08-14 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,011,500 -374,300 -27.01 137,675 -31.16 0.3137
2015-05-13 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,385,800 1,329,000 2,339.79 199,999 2,244.93 0.4259
2015-02-13 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 56,800 56,800 -95.90 8,529 -95.74 0.0206
2014-11-12 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 0 -422,400 -100.00 0 -100.00
2014-08-13 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 422,400 -198,600 -31.98 53,459 -31.11 0.1246
2014-05-14 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 621,000 31,900 5.42 77,606 11.11 0.1861
2014-02-14 2013-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 589,100 256,100 76.91 69,844 84.78 0.1672
2013-11-13 2013-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 333,000 333,000 37,799 0.0917
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.