Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionChemung Canal Trust Co
Latest Disclosed Ownership18,130 shares
Latest Disclosed Value $ 8,687,898
Chemung Canal Trust Co reports 0.09% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On April 22, 2026 - Chemung Canal Trust Co filed a 13F-HR form disclosing ownership of 18,130 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $8,687,898 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 18,146 shares of Berkshire Hathaway Inc.. This represents a change in shares of -0.09% 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)
2026-04-22 2026-03-31 13F BERKSHIRE COMMON STOCK 084670702 18,130 -16 -0.09 8,688 -4.76 1.7583
2026-01-14 2025-12-31 13F BERKSHIRE COMMON STOCK 084670702 18,146 -809 -4.27 9,121 -4.28 1.8056
2025-10-17 2025-09-30 13F BERKSHIRE COMMON STOCK 084670702 18,955 -6,807 -26.42 9,529 -23.85 1.8992
2025-07-22 2025-06-30 13F BERKSHIRE COMMON STOCK 084670702 25,762 1,639 6.79 12,514 -2.59 2.6280
2025-04-30 2025-03-31 13F BERKSHIRE COMMON STOCK 084670702 24,123 -126 -0.52 12,847 16.89 2.8238
2025-01-21 2024-12-31 13F BERKSHIRE COMMON STOCK 084670702 24,249 1,475 6.48 10,992 4.87 2.2922
2024-10-04 2024-09-30 13F BERKSHIRE COMMON STOCK 084670702 22,774 4,600 25.31 10,482 41.77 2.1203
2024-07-17 2024-06-30 13F BERKSHIRE COMMON STOCK 084670702 18,174 -464 -2.49 7,393 -5.67 1.4313
2024-04-17 2024-03-31 13F BERKSHIRE COMMON STOCK 084670702 18,638 -3,746 -16.74 7,838 -1.83 1.5130
2024-01-03 2023-12-31 13F BERKSHIRE COMMON STOCK 084670702 22,384 212 0.96 7,983 2.79 1.6501
2023-10-26 2023-09-30 13F BERKSHIRE COMMON STOCK 084670702 22,172 641 2.98 7,767 5.77 1.7828
2023-07-21 2023-06-30 13F BERKSHIRE COMMON STOCK 084670702 21,531 -536 -2.43 7,342 7.76 1.5763
2023-04-24 2023-03-31 13F BERKSHIRE COMMON STOCK 084670702 22,067 -95 -0.43 6,814 113,450.00 1.5669
2023-01-06 2022-12-31 13F BERKSHIRE COMMON STOCK 084670702 22,162 914 4.30 7 -99.89 1.5603
2022-11-02 2022-09-30 13F BERKSHIRE COMMON STOCK 084670702 21,248 -500 -2.30 5,674 -4.43 1.4143
2022-07-01 2022-06-30 13F BERKSHIRE COMMON STOCK 084670702 21,748 -1,713 -7.30 5,937 -28.29 1.3562
2022-04-14 2022-03-31 13F BERKSHIRE COMMON STOCK 084670702 23,461 301 1.30 8,279 19.55 1.3383
2022-01-14 2021-12-31 13F BERKSHIRE COMMON STOCK 084670702 23,160 1,273 5.82 6,925 15.94 1.2509
2021-10-21 2021-09-30 13F BERKSHIRE COMMON STOCK 084670702 21,887 13,666 166.23 5,973 161.51 1.1470
2021-07-02 2021-06-30 13F BERKSHIRE COMMON STOCK 084670702 8,221 -475 -5.46 2,284 2.79 0.4367
2021-04-02 2021-03-31 13F BERKSHIRE COMMON STOCK 084670702 8,696 -199 -2.24 2,222 7.71 0.4456
2021-01-13 2020-12-31 13F BERKSHIRE COMMON STOCK 084670702 8,895 -35 -0.39 2,063 8.52 0.4336
2020-10-07 2020-09-30 13F BERKSHIRE COMMON STOCK 084670702 8,930 -5,184 -36.73 1,901 -24.56 0.4539
2020-07-10 2020-06-30 13F BERKSHIRE COMMON STOCK 084670702 14,114 -6,159 -30.38 2,520 -32.02 0.6584
2020-04-06 2020-03-31 13F BERKSHIRE COMMON STOCK 084670702 20,273 -553 -2.66 3,707 -21.43 1.1328
2020-01-09 2019-12-31 13F BERKSHIRE COMMON STOCK 084670702 20,826 119 0.57 4,718 9.54 1.0719
2019-10-18 2019-09-30 13F BERKSHIRE COMMON STOCK 084670702 20,707 -10,691 -34.05 4,307 -35.65 1.0485
2019-07-22 2019-06-30 13F BERKSHIRE COMMON STOCK 084670702 31,398 1,287 4.27 6,693 10.65 1.5561
2019-04-10 2019-03-31 13F BERKSHIRE COMMON STOCK 084670702 30,111 -1,433 -4.54 6,049 -6.09 1.4419
2019-01-28 2018-12-31 13F BERKSHIRE COMMON STOCK 084670702 31,544 1,103 3.62 6,441 -1.17 1.8460
2018-10-05 2018-09-30 13F BERKSHIRE COMMON STOCK 084670702 30,441 -15,246 -33.37 6,517 -23.58 1.4442
2018-07-16 2018-06-30 13F BERKSHIRE COMMON STOCK 084670702 45,687 -1,552 -3.29 8,528 -9.50 2.0532
2018-04-16 2018-03-31 13F BERKSHIRE COMMON STOCK 084670702 47,239 -1,865 -3.80 9,423 -3.19 2.2509
2018-01-23 2017-12-31 13F BERKSHIRE COMMON STOCK 084670702 49,104 106 0.22 9,733 8.36 2.1256
2017-10-10 2017-09-30 13F BERKSHIRE COMMON STOCK 084670702 48,998 -803 -1.61 8,982 6.48 2.0463
2017-07-18 2017-06-30 13F BERKSHIRE COMMON STOCK 084670702 49,801 -406 -0.81 8,435 0.80 1.9616
2017-05-17 2017-03-31 13F BERKSHIRE COMMON STOCK 084670702 50,207 -956 -1.87 8,368 0.36 1.9474
2017-01-20 2016-12-31 13F BERKSHIRE COMMON STOCK 084670702 51,163 -899 -1.73 8,338 10.85 1.9600
2016-10-25 2016-09-30 13F BERKSHIRE COMMON STOCK 084670702 52,062 -1,147 -2.16 7,522 -2.36 1.7815
2016-07-29 2016-06-30 13F BERKSHIRE COMMON STOCK 084670702 53,209 -179 -0.34 7,704 1.70 1.8293
2016-04-22 2016-03-31 13F BERKSHIRE COMMON STOCK 084670702 53,388 13,048 32.35 7,575 42.23 1.7473
2016-02-03 2015-12-31 13F BERKSHIRE COMMON STOCK 084670702 40,340 25,684 175.25 5,326 178.70 1.2290
2015-10-19 2015-09-30 13F BERKSHIRE COMMON STOCK 084670702 14,656 -1,404 -8.74 1,911 -12.58 0.4649
2015-07-14 2015-06-30 13F BERKSHIRE COMMON STOCK 084670702 16,060 -1,131 -6.58 2,186 -11.89 0.4790
2015-04-16 2015-03-31 13F BERKSHIRE COMMON STOCK 084670702 17,191 -71 -0.41 2,481 -4.28 0.5085
2015-01-16 2014-12-31 13F BERKSHIRE COMMON STOCK 084670702 17,262 -78 -0.45 2,592 8.18 0.5195
2014-11-13 2014-09-30 13F BERKSHIRE COMMON STOCK 084670702 17,340 -300 -1.70 2,396 7.35 0.4956
2014-07-15 2014-06-30 13F BERKSHIRE COMMON STOCK 084670702 17,640 435 2.53 2,232 3.81 0.4426
2014-04-30 2014-03-31 13F BERKSHIRE COMMON STOCK 084670702 17,205 -50 -0.29 2,150 5.08 0.4427
2014-01-17 2013-12-31 13F BERKSHIRE COMMON STOCK 084670702 17,255 -75 -0.43 2,046 4.02 0.4232
2013-10-03 2013-09-30 13F BERKSHIRE COMMON STOCK 084670702 17,330 -278 -1.58 1,967 -0.20 0.4273
2013-08-09 2013-06-30 13F/A-1 BERKSHIRE COMMON STOCK 084670702 17,608 17,608 1,971 0.4392
2013-08-06 2013-06-30 13F BERKSHIRE COMMON STOCK 084670702 17,608 1,971
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.