Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionNissay Asset Management Corp /japan/ /adv
Latest Disclosed Ownership175,338 shares
Latest Disclosed Value $ 84,021,970
Nissay Asset Management Corp /japan/ /adv reports 1.18% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 15, 2026 - Nissay Asset Management Corp /japan/ /adv filed a 13F-HR form disclosing ownership of 175,338 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $84,021,970 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 173,295 shares of Berkshire Hathaway Inc.. This represents a change in shares of 1.18% 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.

Upgrade to unlock premium data and export to Excel .

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 175,338 2,043 1.18 84,022 -3.54 0.4453
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 173,295 4,673 2.77 87,107 2.75 0.4531
2025-11-14 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 168,622 1,202 0.72 84,773 4.24 0.4682
2025-08-14 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 167,420 5,270 3.25 81,328 -5.82 0.4760
2025-05-15 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 162,150 2,685 1.68 86,358 18.63 0.5612
2025-02-14 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 159,465 -100 -0.06 72,797 -0.88 0.4440
2024-11-14 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 159,565 4,532 2.92 73,441 16.45 0.4650
2024-08-14 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 155,033 3,914 2.59 63,067 -0.76 0.4175
2024-05-15 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 151,119 1,166 0.78 63,549 18.82 0.4403
2024-02-14 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 149,953 5,330 3.69 53,482 5.57 0.4301
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 144,623 4,904 3.51 50,661 6.33 0.4491
2023-08-14 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 139,719 -2,609 -1.83 47,644 8.41 0.4109
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 142,328 -5,120 -3.47 43,947 -3.51 0.3926
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 147,448 -2,439 -1.63 45,547 13.80 0.4353
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 149,887 4,689 3.23 40,023 0.96 0.4202
2022-08-15 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 145,198 4,655 3.31 39,642 -20.08 0.3946
2022-05-16 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 140,543 1,111 0.80 49,599 18.97 0.4321
2022-02-14 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 139,432 -2,260 -1.60 41,690 7.80 0.3194
2021-11-10 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 141,692 1,248 0.89 38,673 -0.92 0.3278
2021-08-13 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 140,444 12,613 9.87 39,032 19.52 0.3426
2021-05-11 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 127,831 -6,142 -4.58 32,657 5.13 0.3219
2021-02-08 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 133,973 665 0.50 31,064 9.43 0.4670
2020-10-20 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 133,308 -16,791 -11.19 28,387 5.95 0.4796
2020-07-27 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 150,099 11,815 8.54 26,794 5.98 0.5200
2020-05-05 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 138,284 4,807 3.60 25,282 -16.38 0.6437
2020-02-14 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 133,477 -1,014 -0.75 30,233 8.06 0.6719
2019-11-14 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 134,491 3,999 3.06 27,977 0.58 0.6923
2019-08-07 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 130,492 -7,532 -5.46 27,817 0.32 0.7032
2019-05-03 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 138,024 -4,848 -3.39 27,728 -4.95 0.7326
2019-02-06 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 142,872 2,750 1.96 29,172 -2.77 0.8890
2018-10-30 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 140,122 3,837 2.82 30,002 17.94 0.8073
2018-08-08 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 136,285 2,007 1.49 25,438 -5.03 0.7442
2018-05-14 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 134,278 -1,164 -0.86 26,786 -0.23 0.8370
2018-02-14 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 135,442 135,442 26,848 0.8176
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.