Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionBRYN MAWR TRUST Co
Latest Disclosed Ownership61,975 shares
Latest Disclosed Value $ 29,698,420
BRYN MAWR TRUST Co reports 12.85% increase in ownership of BRKB / Berkshire Hathaway Inc.

On April 30, 2026 - BRYN MAWR TRUST Co filed a 13F-HR form disclosing ownership of 61,975 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $29,698,420 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 54,916 shares of Berkshire Hathaway Inc.. This represents a change in shares of 12.85% 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)
2026-04-30 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 61,975 7,059 12.85 29,698 7.59 0.5275
2026-02-12 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 54,916 723 1.33 27,604 1.32 0.6477
2025-11-20 2025-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 54,193 -23,091 -29.88 27,245 -27.43 0.6567
2025-10-28 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 83,827 6,543 42,143 0.4669
2025-07-28 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 77,284 -3,414 -4.23 37,542 -12.65 0.6680
2025-05-08 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 80,698 -10,263 -11.28 42,978 4.24 0.8031
2025-01-28 2024-12-31 13F Berkshire Hathaway CL B NEW 084670702 90,961 1,641 1.84 41,231 0.29 0.7421
2024-11-25 2024-09-30 13F Berkshire Hathaway CL B NEW 084670702 89,320 64,867 265.27 41,110 313.29 0.7380
2024-08-08 2024-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,453 -500 -2.00 9,947 -5.20 0.3815
2024-05-15 2024-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 24,953 -1,362 -5.18 10,493 13.83 0.4026
2023-11-15 2023-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 26,315 -1,567 -5.62 9,218 102,322.22 0.4057
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 27,882 -58 -0.21 10 12.50 0.3963
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 27,940 245 0.88 9 0.00 0.3812
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 27,695 -1,184 -4.10 9 -99.90 0.3885
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 28,879 -96 -0.33 7,711 -2.53 0.3766
2022-08-11 2022-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 28,975 -448 -1.52 7,911 -23.82 0.3640
2022-05-16 2022-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 29,423 -3,053 -9.40 10,384 6.93 0.4055
2022-02-10 2021-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 32,476 -4,034 -11.05 9,711 -2.55 0.3492
2021-10-26 2021-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 36,510 929 2.61 9,965 0.77 0.3848
2021-07-29 2021-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,581 189 0.53 9,889 9.38 0.3773
2021-04-23 2021-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,392 -714 -1.98 9,041 7.99 0.3611
2021-02-11 2020-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 36,106 -1,937 -5.09 8,372 3.35 0.3518
2020-11-12 2020-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 38,043 3,803 11.11 8,101 32.54 0.3755
2020-08-13 2020-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 34,240 -700 -2.00 6,112 -4.31 0.3005
2020-05-08 2020-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 34,940 -375 -1.06 6,387 -20.15 0.3755
2020-02-11 2019-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,315 185 0.53 7,999 9.46 0.4057
2019-10-24 2019-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,130 16 0.05 7,308 -2.38 0.3988
2019-08-15 2019-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,114 -634 -1.77 7,486 4.25 0.4051
2019-05-15 2019-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,748 355 1.00 7,181 -0.64 0.3911
2019-08-28 2018-12-31 13F/A-1 BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,393 478 1.37 7,227 -3.33 0.4387
2019-02-15 2018-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,393 478 7,227
2019-08-28 2018-09-30 13F/A-1 BERKSHIRE HATHAWAY COMMON STOCK 084670702 34,915 -1,034 -2.88 7,476 11.42 0.3936
2018-11-15 2018-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 34,915 -1,034 7,476 0.3946
2019-08-27 2018-06-30 13F/A-1 BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,949 24 0.07 6,710 -6.36 0.3742
2018-08-14 2018-06-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,949 24 6,710
2019-08-27 2018-03-31 13F/A-1 BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,925 -537 -1.47 7,166 -0.86 0.4099
2018-05-15 2018-03-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,925 -537 7,167
2019-08-27 2017-12-31 13F/A-1 BERKSHIRE HATHAWAY COMMON STOCK 084670702 36,462 590 1.64 7,228 9.90 0.3946
2018-02-15 2017-12-31 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 36,462 590 7,227 0.3957
2019-08-27 2017-09-30 13F/A-1 BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,872 2,880 8.73 6,577 17.70 0.3764
2017-11-14 2017-09-30 13F BERKSHIRE HATHAWAY COMMON STOCK 084670702 35,872 2,880 6,576 0.3735
2017-08-11 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 32,992 331 1.01 5,588 2.65 0.3324
2017-05-12 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 32,661 -3,095 -8.66 5,444 -6.59 0.3294
2017-02-03 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 35,756 1,296 3.76 5,828 17.05 0.3654
2016-11-10 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 34,460 -204 -0.59 4,979 -0.80 0.3136
2016-08-10 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 34,664 -106 -0.30 5,019 1.74 0.3189
2016-05-03 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 34,770 -1,407 -3.89 4,933 3.27 0.3167
2016-02-12 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 36,177 -73 -0.20 4,777 1.06 0.2992
2015-11-09 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 36,250 4,150 12.93 4,727 8.19 0.3027
2015-08-25 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 32,100 100 0.31 4,369 -5.39 0.2538
2015-05-12 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 32,000 256 0.81 4,618 -3.11 0.2627
2015-02-17 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 31,744 -960 -2.94 4,766 5.51 0.2675
2014-11-14 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL COMMON 084670702 32,704 -950 -2.82 4,517 6.06 0.2562
2014-08-07 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL COMMON 084670702 33,654 -1,620 -4.59 4,259 -3.38 0.2348
2014-05-13 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL COMMON 084670702 35,274 -353 -0.99 4,408 4.36 0.2467
2014-02-14 2013-12-31 13F BERKSHIRE COMMON 084670702 35,627 416 1.18 4,224 5.68 0.2377
2013-11-06 2013-09-30 13F BERKSHIRE COMMON 084670702 35,211 4,671 15.29 3,997 16.94 0.2463
2013-08-09 2013-06-30 13F BERKSHIRE HATHAWAY INC DEL COMMON 084670702 30,540 -1,180 -3.72 3,418 3.42 0.2210
2013-05-20 2013-03-31 13F BERKSHIRE HATHAWAY INC DEL COMMON STOCK 084670702 31,720 31,720 3,305 0.2132
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.