Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionFirst American Trust, Fsb
Latest Disclosed Ownership9,819 shares
Latest Disclosed Value $ 4,705,110
First American Trust, Fsb reports 0.93% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 12, 2026 - First American Trust, Fsb filed a 13F-HR form disclosing ownership of 9,819 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $4,705,110 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 9,729 shares of Berkshire Hathaway Inc.. This represents a change in shares of 0.93% 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)
2026-05-12 2026-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 9,819 90 0.93 4,705 -3.76 0.3165
2026-02-11 2025-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 9,729 -345 -3.42 4,890 -3.46 0.3360
2025-11-10 2025-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 10,074 915 9.99 5,064 13.85 0.3677
2025-08-11 2025-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 9,159 172 1.91 4,449 -7.06 0.3552
2025-05-12 2025-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 8,987 -51 -0.56 4,786 16.85 0.4401
2025-02-11 2024-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 9,038 597 7.07 4,097 5.43 0.4087
2024-11-12 2024-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 8,441 -169 -1.96 3,885 10.94 0.3852
2024-08-12 2024-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 8,610 -191 -2.17 3,503 -5.35 0.3511
2024-05-13 2024-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 8,801 431 5.15 3,701 23.95 0.3879
2024-01-30 2023-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 8,370 1,023 13.92 2,985 16.01 0.3694
2023-10-31 2023-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,347 35 0.48 2,574 128,550.00 0.3642
2023-07-26 2023-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,312 -607 -7.67 2 0.00 0.3435
2023-04-26 2023-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,919 129 1.66 2 0.00 0.3628
2023-01-25 2022-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,790 412 5.58 2 -99.90 0.3729
2022-10-18 2022-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,378 -353 -4.57 1,970 -6.68 0.3309
2022-07-19 2022-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,731 -46 -0.59 2,111 -23.07 0.3340
2022-04-12 2022-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,777 -352 -4.33 2,744 12.88 0.3585
2022-01-11 2021-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 8,129 299 3.82 2,431 13.76 0.3319
2021-10-21 2021-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,830 -3 -0.04 2,137 -1.84 0.3226
2021-07-29 2021-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 7,833 -362 -4.42 2,177 4.01 0.3419
2021-04-27 2021-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 8,195 -1,113 -11.96 2,093 -3.01 0.3304
2021-01-28 2020-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 9,308 -25,936 -73.59 2,158 -71.25 0.3596
2020-10-14 2020-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,244 464 1.33 7,505 20.89 1.3448
2020-07-08 2020-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 34,780 -29,860 -46.19 6,208 -47.47 1.2174
2020-04-28 2020-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 64,640 2,298 3.69 11,818 -16.30 2.8869
2020-01-29 2019-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 62,342 778 1.26 14,120 10.25 2.7027
2019-10-10 2019-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 61,564 8,401 15.80 12,807 13.01 2.5696
2019-07-08 2019-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 53,163 2,266 4.45 11,333 10.84 2.3571
2019-04-09 2019-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 50,897 -5,165 -9.21 10,225 -10.68 2.2553
2019-01-11 2018-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 56,062 683 1.23 11,447 -3.46 2.8809
2018-10-02 2018-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 55,379 10,076 22.24 11,857 40.22 2.6454
2018-07-06 2018-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 45,303 5,892 14.95 8,456 7.56 1.9884
2018-04-09 2018-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 39,411 -649 -1.62 7,862 -0.98 1.9084
2018-01-10 2017-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 40,060 710 1.80 7,940 10.08 1.9540
2017-10-06 2017-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 39,350 9,771 33.03 7,213 43.97 1.8838
2017-07-06 2017-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 29,579 -12,935 -30.43 5,010 -29.30 1.3940
2017-04-05 2017-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 42,514 -1,544 -3.50 7,086 -1.32 2.1612
2017-01-04 2016-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 44,058 -1,951 -4.24 7,181 8.03 2.2205
2016-10-05 2016-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 46,009 6,354 16.02 6,647 15.76 2.0753
2016-07-06 2016-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 39,655 -1,885 -4.54 5,742 -2.56 2.0265
2016-04-05 2016-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 41,540 20,841 100.69 5,893 115.62 2.0657
2016-01-07 2015-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 20,699 -4,269 -17.10 2,733 -16.06 1.0071
2015-10-13 2015-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,968 383 1.56 3,256 -2.69 1.2574
2015-07-02 2015-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,585 -205 -0.83 3,346 -6.46 1.2386
2015-05-11 2015-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,790 596 2.46 3,577 -1.54 1.2748
2015-01-07 2014-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,194 20,924 639.88 3,633 703.76 1.3449
2014-10-03 2014-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 3,270 0 0.00 452 9.18 0.1678
2014-07-09 2014-06-30 13F BERKSHIRE HATHAW AY COMMON STOCK 084670702 3,270 970 42.17 414 44.25 0.1573
2014-05-08 2014-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 2,300 -22,300 -90.65 287 -90.16 0.1072
2014-02-07 2013-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,600 -50 -0.20 2,917 4.25 0.9849
2013-11-07 2013-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,650 50 0.20 2,798 1.63 1.0063
2013-07-10 2013-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,600 24,600 2,753 1.0332
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.