Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionWoodstock Corp
Latest Disclosed Ownership21,477 shares
Latest Disclosed Value $ 10,291,778
Woodstock Corp reports 2.58% increase in ownership of BRKB / Berkshire Hathaway Inc.

On April 8, 2026 - Woodstock Corp filed a 13F-HR form disclosing ownership of 21,477 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $10,291,778 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 20,937 shares of Berkshire Hathaway Inc.. This represents a change in shares of 2.58% 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)
2026-04-08 2026-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 21,477 540 2.58 10,292 -2.20 0.9161
2026-01-14 2025-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 20,937 460 2.25 10,524 2.22 0.9031
2025-10-07 2025-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 20,477 -225 -1.09 10,295 2.37 0.8921
2025-07-09 2025-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 20,702 -9 -0.04 10,056 -8.83 0.9243
2025-04-09 2025-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 20,711 514 2.54 11,030 20.49 1.0896
2025-01-15 2024-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 20,197 503 2.55 9,155 0.99 0.8819
2024-10-11 2024-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 19,694 275 1.42 9,064 14.75 0.8722
2024-07-08 2024-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 19,419 415 2.18 7,900 -1.15 0.8033
2024-04-09 2024-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 19,004 -210 -1.09 7,992 16.62 0.8273
2024-01-08 2023-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 19,214 141 0.74 6,853 2.56 0.7936
2023-10-10 2023-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 19,073 111 0.59 6,681 3.33 0.8378
2023-07-07 2023-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 18,962 934 5.18 6,466 16.17 0.7630
2023-04-06 2023-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 18,028 528 3.02 5,567 2.98 0.7099
2023-01-10 2022-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 17,500 -820 -4.48 5,406 10.49 0.7185
2022-10-11 2022-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 18,320 1,918 11.69 4,892 9.25 0.7278
2022-07-11 2022-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 16,402 217 1.34 4,478 -21.60 0.6215
2022-04-07 2022-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 16,185 347 2.19 5,712 20.61 0.6689
2022-01-07 2021-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 15,838 373 2.41 4,736 12.20 0.4959
2021-10-05 2021-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 15,465 51 0.33 4,221 -1.47 0.4922
2021-07-06 2021-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 15,414 286 1.89 4,284 10.84 0.5041
2021-04-05 2021-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 15,128 321 2.17 3,865 12.58 0.4914
2021-01-06 2020-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 14,807 2,535 20.66 3,433 31.38 0.4595
2020-10-02 2020-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 12,272 -425 -3.35 2,613 15.26 0.4220
2020-07-07 2020-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 12,697 484 3.96 2,267 1.52 0.3865
2020-04-03 2020-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 12,213 1,285 11.76 2,233 -9.78 0.4550
2020-01-13 2019-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 10,928 930 9.30 2,475 18.99 0.4031
2019-10-02 2019-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 9,998 -295 -2.87 2,080 -5.20 0.3624
2019-07-03 2019-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 10,293 -250 -2.37 2,194 3.59 0.3830
2019-04-05 2019-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 10,543 -175 -1.63 2,118 -3.20 0.3795
2019-01-08 2018-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 10,718 -25 -0.23 2,188 -4.87 0.4391
2018-10-03 2018-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 10,743 160 1.51 2,300 16.46 0.3887
2018-07-23 2018-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 10,583 144 1.38 1,975 -5.14 0.3636
2018-04-19 2018-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 10,439 1,010 10.71 2,082 11.40 0.3937
2018-01-24 2017-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 9,429 640 7.28 1,869 16.01 0.3447
2017-10-06 2017-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 8,789 197 2.29 1,611 10.72 0.3071
2017-07-13 2017-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 8,592 -60 -0.69 1,455 0.90 0.2852
2017-04-05 2017-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 8,652 900 11.61 1,442 14.17 0.2906
2017-01-05 2016-12-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 7,752 215 2.85 1,263 15.98 0.2560
2016-10-06 2016-09-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 7,537 60 0.80 1,089 0.55 0.2228
2016-08-03 2016-06-30 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 7,477 350 4.91 1,083 7.12 0.2235
2016-05-10 2016-03-31 13F Berkshire Hathaway Inc CL B COMMON STOCK 084670702 7,127 -50 -0.70 1,011 6.65 0.2127
2016-01-11 2015-12-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 7,177 487 7.28 948 8.72 0.2084
2015-10-16 2015-09-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 6,690 -6,650 -49.85 872 -51.98 0.1985
2015-07-07 2015-06-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 13,340 -2,147 -13.86 1,816 -18.75 0.3422
2015-04-09 2015-03-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 15,487 3,115 25.18 2,235 20.29 0.4147
2015-02-13 2014-12-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 12,372 0 0.00 1,858 8.72 0.3451
2014-10-06 2014-09-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 12,372 0 0.00 1,709 9.13 0.3288
2014-07-07 2014-06-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 12,372 -300 -2.37 1,566 -1.14 0.2775
2014-04-07 2014-03-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 12,672 0 0.00 1,584 5.46 0.2946
2014-01-13 2013-12-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 12,672 0 0.00 1,502 4.45 0.2728
2013-10-07 2013-09-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 12,672 0 0.00 1,438 1.41 0.2849
2013-07-09 2013-06-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON STOCK 084670702 12,672 12,672 1,418 0.2898
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.