Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionHarbour Capital Advisors, LLC
Latest Disclosed Ownership1,864 shares
Latest Disclosed Value $ 867,506
Harbour Capital Advisors, LLC reports 47.47% increase in ownership of BRKB / Berkshire Hathaway Inc.

On April 29, 2026 - Harbour Capital Advisors, LLC filed a 13F-HR form disclosing ownership of 1,864 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $867,506 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 7, 2026 disclosing 1,264 shares of Berkshire Hathaway Inc.. This represents a change in shares of 47.47% 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)
2026-04-29 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,864 600 47.47 868 38.06 0.1652
2026-01-07 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,264 0 0.00 628 -0.95 0.1279
2025-10-09 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,264 -242 -16.07 635 -12.31 0.1299
2025-07-11 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,506 0 0.00 724 -9.40 0.1525
2025-04-23 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,506 100 7.11 798 25.27 0.1974
2025-01-13 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,406 -1,500 -51.62 638 -51.89 0.1422
2024-10-16 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,906 0 0.00 1,325 12.49 0.3057
2024-07-12 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,906 0 0.00 1,177 -3.29 0.2793
2024-04-16 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,906 -49 -1.66 1,217 12.37 0.3015
2024-01-05 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,955 -200 -6.34 1,084 -1.99 0.2972
2023-10-05 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,155 -300 -8.68 1,105 -6.44 0.3314
2023-07-10 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,455 -700 -16.85 1,182 -7.95 0.3485
2023-04-19 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,155 2,950 244.81 1,283 243.97 0.3878
2023-01-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,205 0 0.00 373 15.84 0.1256
2022-10-19 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,205 0 0.00 322 -2.13 0.1117
2022-07-20 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,205 0 0.00 329 -22.59 0.1073
2022-04-11 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,205 0 0.00 425 18.06 0.1163
2022-01-12 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,205 0 0.00 360 9.42 0.0885
2021-10-13 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,205 -50 -3.98 329 -5.73 0.0866
2021-07-14 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,255 0 0.00 349 8.72 0.0937
2021-04-12 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,255 1,255 321 0.0945
2021-01-12 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 0 -1,155 -100.00 0 -100.00
2020-10-09 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,155 0 0.00 246 19.42 0.0899
2020-07-21 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,155 -400 -25.72 206 -27.46 0.0835
2020-04-08 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,555 -150 -8.80 284 -26.42 0.1444
2020-01-22 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,705 -150 -8.09 386 0.00 0.1479
2019-10-30 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,855 150 8.80 386 6.34 0.1632
2019-07-10 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,705 -150 -8.09 363 -2.68 0.1556
2019-04-24 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,855 -125 -6.31 373 -7.67 0.1647
2019-01-23 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,980 -41 -2.03 404 -6.70 0.2006
2018-11-07 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,021 106 5.54 433 20.28 0.1744
2018-07-11 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,915 -10 -0.52 360 -6.25 0.1542
2018-04-18 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,925 130 7.24 384 7.87 0.1634
2018-01-24 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,795 0 0.00 356 8.21 0.1478
2017-11-08 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,795 -10 -0.55 329 7.52 0.1434
2017-08-01 2017-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,805 -100 -5.25 306 -3.47 0.1520
2017-07-27 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 305,713 303,808 1,805
2017-05-15 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,905 0 0.00 318 2.26 0.1449
2017-02-03 2016-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 1,905 0 0.00 310 12.73 0.2223
2016-11-09 2016-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 1,905 0 0.00 275 -0.36 0.1722
2016-08-26 2016-06-30 13F BERKSHIRE HATHAWAY COM 084670702 1,905 -75 -3.79 276 -1.78 0.1550
2016-09-13 2016-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 1,980 -200 -9.17 281 -2.43 0.1599
2016-10-03 2015-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,180 0 0.00 288 1.41 0.1568
2016-10-12 2015-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,180 0 0.00 284 -4.38 0.2010
2016-10-27 2015-06-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,180 0 0.00 297 -5.71 0.1853
2016-11-28 2015-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,180 0 0.00 315 -3.67 0.2198
2016-12-05 2014-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,180 0 0.00 327 8.64 0.2343
2016-12-19 2014-09-30 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,180 0 0.00 301 9.06 0.2488
2016-12-30 2014-06-30 13F BERKSHIRE HATHAWAY SHS 084670702 2,180 -250 -10.29 276 -9.21 0.2168
2017-01-18 2014-03-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 2,430 -250 -9.33 304 -4.40 0.2880
2017-03-21 2013-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,680 2,680 318 0.2808
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.