Berkshire Hathaway Inc.
US ˙ NYSE

SecurityBRK.B / Berkshire Hathaway Inc.
InstitutionAsset Management Group, Inc.
Latest Disclosed Ownership6,815 shares
Latest Disclosed Value $ 3,265,724
Asset Management Group, Inc. reports 1.47% decrease in ownership of BRK.B / Berkshire Hathaway Inc.

On May 15, 2026 - Asset Management Group, Inc. filed a 13F-HR form disclosing ownership of 6,815 shares of Berkshire Hathaway Inc. (US:BRK.B) valued at $3,265,748 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 6,917 shares of Berkshire Hathaway Inc.. This represents a change in shares of -1.47% during the quarter. The current value of the position is $3,239,647 USD.

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)
2026-05-15 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,815 -102 -1.47 3,266 -6.07 0.5262
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,917 -173 -2.44 3,477 -2.47 0.5623
2025-11-14 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,090 -95 -1.32 3,564 2.12 0.5831
2025-08-12 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,185 64 0.90 3,490 -7.96 0.6084
2025-05-14 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,121 0 0.00 3,792 17.51 0.7008
2025-02-14 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,121 135 1.93 3,228 0.37 0.5739
2024-11-12 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,986 -109 -1.54 3,215 11.40 0.5630
2024-08-13 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,095 62 0.88 2,886 -2.14 0.5376
2024-05-15 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,033 -2 -0.03 2,949 17.44 0.5536
2024-02-14 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,035 2,229 46.38 2,511 49.20 0.5032
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 4,806 -2,307 -32.43 1,684 -30.60 0.3703
2023-08-14 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,113 0 0.00 2,426 10.43 0.5149
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,113 0 0.00 2,196 -0.05 0.4897
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,113 -82 -1.14 2,197 14.37 0.5163
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,195 92 1.30 1,921 -0.93 0.4798
2022-08-15 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,103 423 6.33 1,939 -17.73 0.4652
2022-05-16 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,680 494 7.99 2,357 27.41 0.4931
2022-02-14 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,186 -22 -0.35 1,850 9.21 0.3636
2021-11-15 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,208 20 0.32 1,694 -1.51 0.3477
2021-08-16 2021-06-30 13F Berkshire Hathaway Cl B SK 084670702 6,188 -524 -7.81 1,720 0.29 0.3558
2021-05-17 2021-03-31 13F Berkshire Hathaway Cl B SK 084670702 6,712 -205 -2.96 1,715 6.92 0.3713
2021-02-16 2020-12-31 13F Berkshire Hathaway Cl B SK 084670702 6,917 0 0.00 1,604 8.89 0.3900
2020-11-16 2020-09-30 13F Berkshire Hathaway Cl B SK 084670702 6,917 0 0.00 1,473 19.27 0.4305
2020-08-14 2020-06-30 13F Berkshire Hathaway Cl B SK 084670702 6,917 0 0.00 1,235 -2.37 0.3902
2020-05-15 2020-03-31 13F Berkshire Hathaway Cl B SK 084670702 6,917 1,523 28.24 1,265 3.52 0.4772
2020-02-14 2019-12-31 13F Berkshire Hathaway Cl B SK 084670702 5,394 0 0.00 1,222 8.91 0.3697
2019-11-14 2019-09-30 13F Berkshire Hathaway Cl B SK 084670702 5,394 -124 -2.25 1,122 -4.59 0.3847
2019-08-14 2019-06-30 13F Berkshire Hathaway Cl B SK 084670702 5,518 -140 -2.47 1,176 3.43 0.4176
2019-05-15 2019-03-31 13F Berkshire Hathaway Cl B SK 084670702 5,658 0 0.00 1,137 -1.56 0.4124
2019-02-14 2018-12-31 13F Berkshire Hathaway Cl B SK 084670702 5,658 0 0.00 1,155 -4.62 0.4743
2018-11-13 2018-09-30 13F Berkshire Hathaway Cl B SK 084670702 5,658 -136 -2.35 1,211 12.03 0.4100
2018-08-14 2018-06-30 13F Berkshire Hathaway Cl B SK 084670702 5,794 -602 -9.41 1,081 -15.28 0.3775
2018-05-15 2018-03-31 13F Berkshire Hathaway Cl B SK 084670702 6,396 -76 -1.17 1,276 -0.55 0.4571
2018-02-14 2017-12-31 13F Berkshire Hathaway Cl B SK 084670702 6,472 -207 -3.10 1,283 4.82 0.4621
2017-11-14 2017-09-30 13F Berkshire Hathaway Cl B SK 084670702 6,679 -490 -6.83 1,224 0.82 0.4589
2017-08-14 2017-06-30 13F Berkshire Hathaway Cl B SK 084670702 7,169 -129 -1.77 1,214 -0.16 0.4693
2017-05-15 2017-03-31 13F Berkshire Hathaway Cl B SK 084670702 7,298 -511 -6.54 1,216 -4.48 0.4812
2017-02-14 2016-12-31 13F Berkshire Hathaway Cl B SK 084670702 7,809 1,520 24.17 1,273 40.04 0.5226
2016-11-14 2016-09-30 13F Berkshire Hathaway Cl B SK 084670702 6,289 1,550 32.71 909 32.51 0.3778
2016-08-15 2016-06-30 13F Berkshire Hathaway Cl B SK 084670702 4,739 -18 -0.38 686 1.63 0.2975
2016-05-16 2016-03-31 13F Berkshire Hathaway Cl B SK 084670702 4,757 0 0.00 675 7.48 0.2993
2016-02-16 2015-12-31 13F Berkshire Hathaway Cl B SK 084670702 4,757 0 0.00 628 1.29 0.2850
2015-11-16 2015-09-30 13F Berkshire Hathaway Cl B SK 084670702 4,757 0 0.00 620 -4.17 0.2905
2015-08-14 2015-06-30 13F Berkshire Hathaway Cl B SK 084670702 4,757 -200 -4.03 647 -9.51 0.2917
2015-05-15 2015-03-31 13F Berkshire Hathaway Cl B SK 084670702 4,957 0 0.00 715 -3.90 0.3316
2015-02-17 2014-12-31 13F Berkshire Hathaway Cl B SK 084670702 4,957 -166 -3.24 744 5.08 0.3746
2014-11-14 2014-09-30 13F Berkshire Hathaway Cl B SK 084670702 5,123 1,850 56.52 708 71.01 0.3780
2014-08-14 2014-06-30 13F Berkshire Hathaway Cl B SK 084670702 3,273 398 13.84 414 15.32 0.2235
2014-05-15 2014-03-31 13F Berkshire Hathaway Cl B SK 084670702 2,875 5 0.17 359 5.59 0.2063
2014-02-14 2013-12-31 13F Berkshire Hathaway Cl B SK 084670702 2,870 0 0.00 340 4.29 0.2071
2013-11-14 2013-09-30 13F Berkshire Hathaway Cl B SK 084670702 2,870 -46 -1.58 326 0.00 0.2123
2013-08-14 2013-06-30 13F Berkshire Hathaway Cl B SK 084670702 2,916 2,916 326 0.2240
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.