Berkshire Hathaway Inc.
CH ˙ SWX
SecurityCH:BRK / Berkshire Hathaway Inc.
InstitutionAssetmark, Inc
Latest Disclosed Ownership253,243 shares
Latest Disclosed Value $ 121,354,121
Assetmark, Inc reports 9.90% increase in ownership of BRK / Berkshire Hathaway Inc.

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 253,243 shares of Berkshire Hathaway Inc. (CH:BRK) valued at $121,354,121 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 230,428 shares of Berkshire Hathaway Inc.. This represents a change in shares of 9.90% 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)
2026-05-06 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 253,243 22,815 9.90 121,354 4.77 0.2475
2026-01-23 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 230,428 36,432 18.78 115,825 18.76 0.2362
2025-11-06 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 193,996 17,808 10.11 97,530 13.95 0.2091
2025-08-04 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 176,188 41,510 30.82 85,587 19.32 0.2021
2025-05-06 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 134,678 13,497 11.14 71,727 30.58 0.1970
2025-02-06 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 121,181 35,557 41.53 54,929 39.38 0.1492
2024-11-01 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 85,624 2,592 3.12 39,409 16.67 0.1129
2024-08-13 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 83,032 3,023 3.78 33,778 0.39 0.1045
2024-05-07 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 80,009 300 0.38 33,645 18.35 0.1094
2024-02-09 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 79,709 1,488 1.90 28,429 3.76 0.1027
2023-10-27 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 78,221 1,495 1.95 27,401 4.73 0.1096
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B CL B NEW 084670702 76,726 916 1.21 26,164 11.77 0.1026
2023-05-05 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B CL B NEW 084670702 75,810 482 0.64 23,408 0.60 0.0968
2023-02-10 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 75,328 -2,191 -2.83 23,269 12.41 0.1009
2022-11-01 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 77,519 -11,896 -13.30 20,699 -15.21 0.0968
2022-08-03 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B CL B NEW 084670702 89,415 14,966 20.10 24,412 -7.09 0.1094
2022-05-13 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B CL B NEW 084670702 74,449 70,944 2,024.08 26,274 2,407.06 0.1100
2022-02-14 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B CL B NEW 084670702 3,505 1,224 53.66 1,048 68.22 0.0043
2021-11-12 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B CL B 084670702 2,281 -28,180 -92.51 623 -92.64 0.0028
2021-08-16 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 30,461 28,909 1,862.69 8,466 2,037.88 0.0393
2021-05-14 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL COM 084670702 1,552 -410 -20.90 396 -12.97 0.0020
2021-02-10 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 1,962 -225 -10.29 455 -2.36 0.0025
2020-11-13 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 2,187 -2 -0.09 466 19.18 0.0030
2020-08-11 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 2,189 -75,144 -97.17 391 -97.23 0.0028
2020-05-12 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 77,333 74,377 2,516.14 14,139 2,010.30 0.1197
2020-02-11 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 2,956 439 17.44 670 27.86 0.0051
2019-11-13 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 2,517 -52 -2.02 524 -4.38 0.0044
2019-08-14 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 2,569 -528 -17.05 548 -11.90 0.0045
2019-05-14 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 3,097 -197 -5.98 622 -7.58 0.0056
2019-02-13 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 3,294 1,911 138.18 673 127.36 0.0065
2018-11-13 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 1,383 542 64.45 296 88.54 0.0027
2018-08-01 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 841 14 1.69 157 -4.85 0.0015
2018-05-16 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 827 -2,463 -74.86 165 -74.69 0.0017
2018-02-13 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 3,290 1,263 62.31 652 75.27 0.0067
2017-11-08 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 2,027 -118,038 -98.31 372 -98.17 0.0042
2017-08-14 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 120,065 -7,748 -6.06 20,335 -4.55 0.2558
2017-09-15 2017-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 127,813 734 0.58 21,304 2.86 0.2799
2017-05-08 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 127,813 734 21,304
2017-09-15 2016-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 127,079 8,512 7.18 20,711 20.91 0.3042
2017-02-14 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 127,079 8,512 20,711
2017-09-14 2016-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 118,567 116,887 6,957.56 17,129 6,948.97 0.2605
2016-11-04 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 118,567 116,887 17,129
2017-09-14 2016-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 1,680 377 28.93 243 31.35 0.0041
2016-08-08 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 1,680 377 243
2017-09-14 2016-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 1,303 -369 -22.07 185 -16.29 0.0032
2016-05-13 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 1,303 -369 185
2017-09-14 2015-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 1,672 1,259 304.84 221 309.26 0.0041
2016-02-12 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 1,672 1,259 221
2016-01-05 2015-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 413 -20,470 -98.02 54 -98.10 0.0011
2015-11-10 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 413 54
2015-08-13 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 20,883 1,679 8.74 2,843 2.56 0.0592
2015-05-12 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B COM 084670702 19,204 19,204 0.00 2,772 0.0590
2015-02-03 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B CL B 084670702 0 -17,731 -100.00 0 -100.00
2014-11-10 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B CL B 084670702 17,731 18 0.10 2,449 9.23 0.0566
2014-08-12 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B CL B 084670702 17,713 -2,755 -13.46 2,242 -12.35 0.0478
2014-05-06 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B CL B 084670702 20,468 20,468 -7.46 2,558 1.87 0.0624
2014-02-11 2013-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B CL B 084670702 0 -22,118 -100.00 0 -100.00
2014-02-11 2013-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B CL B 084670702 22,118 22,118 2,511 0.0634
2013-11-14 2013-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B CL B 084670702 22,118 2,511 0.0634
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.