Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionProgressive Investment Management Corp
Latest Disclosed Ownership1,660 shares
Latest Disclosed Value $ 795,472
Progressive Investment Management Corp ownership in BRKB / Berkshire Hathaway Inc.

On May 5, 2026 - Progressive Investment Management Corp filed a 13F-HR form disclosing ownership of 1,660 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $795,472 USD as of March 31, 2026.

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)
2026-05-05 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 795 -4.68 0.2100
2026-02-13 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 834 0.00 0.1996
2025-11-05 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 835 3.47 0.2028
2025-07-29 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 -1,488 -47.27 806 -51.91 0.2054
2025-05-13 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 3,148 1,488 89.64 1,677 122.87 0.4694
2025-02-12 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 752 -1.57 0.1932
2024-11-08 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 764 13.19 0.1960
2024-08-13 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 675 -3.30 0.1789
2024-04-22 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 698 17.91 0.1915
2024-01-24 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 592 1.89 0.1685
2023-10-19 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 581 2.65 0.1889
2023-07-25 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 566 10.55 0.1765
2023-05-02 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 0 0.00 513 0.00 0.1654
2023-01-30 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,660 300 22.06 513 41.05 0.1989
2022-10-19 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,360 0 0.00 363 -2.16 0.1492
2022-07-27 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,360 0 0.00 371 -22.71 0.1449
2022-05-09 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,360 0 0.00 480 17.94 0.1512
2022-02-03 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,360 0 0.00 407 9.70 0.1129
2021-11-09 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,360 0 0.00 371 -1.85 0.1101
2021-08-10 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,360 0 0.00 378 8.93 0.1179
2021-05-11 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,360 -62 -4.36 347 5.15 0.1223
2021-02-04 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,422 0 0.00 330 8.91 0.1188
2020-10-29 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,422 -386 -21.35 303 -6.19 0.1200
2020-08-10 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,808 -114 -5.93 323 -7.98 0.1411
2020-05-05 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,922 -953 -33.15 351 -46.08 0.1953
2020-02-10 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,875 421 17.16 651 27.65 0.3177
2019-11-07 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,454 853 53.28 510 49.56 0.2731
2019-08-12 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,601 -9 -0.56 341 5.57 0.1911
2019-05-07 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,610 -14 -0.86 323 -2.71 0.1878
2019-02-06 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,624 -43 -2.58 332 -7.00 0.2279
2018-11-06 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,667 -20 -1.19 357 14.42 0.2130
2018-08-06 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,687 15 0.90 312 -6.59 0.2013
2018-05-02 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,672 0 0.00 334 0.91 0.2238
2018-01-09 2017-12-31 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,672 -117 -6.54 331 0.91 0.2222
2017-11-02 2017-09-30 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,789 150 9.15 328 17.99 0.2472
2017-08-04 2017-06-30 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,639 0 0.00 278 1.83 0.2162
2017-04-25 2017-03-31 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,639 117 7.69 273 10.08 0.2275
2017-02-15 2016-12-31 13F/A-1 Berkshire Hathaway Cl B COMMON STOCK 084670702 1,522 0 0.00 248 12.73 0.2271
2017-02-14 2016-12-31 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,522 248
2016-11-04 2016-09-30 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,522 0 0.00 220 0.00 0.2044
2016-08-10 2016-06-30 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,522 0 0.00 220 1.85 0.2132
2016-05-13 2016-03-31 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,522 0 0.00 216 7.46 0.2196
2016-02-12 2015-12-31 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,522 0 0.00 201 1.52 0.2148
2015-11-12 2015-09-30 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,522 0 0.00 198 -4.35 0.2286
2015-08-12 2015-06-30 13F Berkshire Hathaway Cl B COMMON STOCK 084670702 1,522 1,522 207 0.2278
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.