Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionTranquility Partners, LLC
Latest Disclosed Ownership4,887 shares
Latest Disclosed Value $ 2,341,850
Tranquility Partners, LLC ownership in BRKB / Berkshire Hathaway Inc.

On April 20, 2026 - Tranquility Partners, LLC filed a 13F-HR form disclosing ownership of 4,887 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $2,341,850 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 4,887 shares of Berkshire Hathaway Inc.. This represents a change in shares of 0.00% 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)
2026-04-20 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,887 0 0.00 2,342 -4.68 0.8834
2026-02-03 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,887 -66 -1.33 2,456 -1.37 0.8849
2025-10-30 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,953 -42 -0.84 2,490 2.64 0.8407
2025-07-25 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,995 -4 -0.08 2,426 -8.87 0.8666
2025-04-24 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,999 -4 -0.08 2,662 17.42 1.0282
2025-01-29 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,003 -114 -2.23 2,268 -3.74 0.8528
2024-11-07 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,117 -100 -1.92 2,355 10.98 0.8539
2024-07-25 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,217 -35 -0.67 2,122 -3.89 0.8165
2024-05-07 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,252 27 0.52 2,209 18.52 0.8536
2024-01-31 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,225 -338 -6.08 1,864 -4.36 0.7813
2023-10-31 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,563 281 5.32 1,949 8.16 0.8353
2023-07-17 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,282 201 3.96 1,801 14.86 0.7759
2023-05-08 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,081 -201 -3.81 1,569 -3.86 0.7474
2023-02-02 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 5,282 386 7.88 1,632 24.79 0.8300
2022-11-01 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,896 140 2.94 1,307 0.69 0.7273
2022-08-01 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL COM 084670702 4,756 210 4.62 1,298 -19.08 0.6715
2022-04-29 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,546 40 0.89 1,604 19.08 0.7510
2022-01-31 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,506 122 2.78 1,347 12.53 0.6234
2021-10-20 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,384 228 5.49 1,197 3.64 0.6074
2021-07-23 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,156 -102 -2.40 1,155 6.16 0.6489
2021-04-30 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,258 112 2.70 1,088 13.22 0.6766
2021-01-29 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,146 129 3.21 961 12.40 0.6790
2020-11-10 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,017 0 0.00 855 19.25 0.7264
2020-07-29 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,017 2,807 231.98 717 224.43 0.6751
2020-04-20 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,210 -1,200 -49.79 221 -59.52 0.2544
2020-02-03 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,410 0 0.00 546 8.98 0.4929
2019-11-14 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,410 -130 -5.12 501 -7.39 0.5310
2019-08-13 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,540 2,540 541 0.5832
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.