Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionSpears Abacus Advisors LLC
Latest Disclosed Ownership340,200 shares
Latest Disclosed Value $ 163,023,888
Spears Abacus Advisors LLC reports 0.21% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 15, 2026 - Spears Abacus Advisors LLC filed a 13F-HR/A form disclosing ownership of 340,200 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $163,023,888 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 339,478 shares of Berkshire Hathaway Inc.. This represents a change in shares of 0.21% 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)
2026-05-15 2026-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 340,200 722 0.21 163,024 -4.46 3.1962
2026-05-14 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 340,200 722 162,605 3.2217
2026-02-17 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 339,478 -835 -0.25 170,639 -0.26 3.1924
2025-11-14 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 340,313 -2,039 -0.60 171,089 2.88 3.2271
2025-08-14 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 342,352 -8,379 -2.39 166,304 -10.97 3.3586
2025-05-14 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 350,731 -4,090 -1.15 186,792 16.14 4.0222
2025-02-12 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 354,821 -13,999 -3.80 160,833 -5.25 3.3038
2024-11-12 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 368,820 -4,508 -1.21 169,753 11.78 3.3410
2024-08-12 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 373,328 -712 -0.19 151,870 -3.45 3.1508
2024-05-10 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 374,040 266,299 247.17 157,291 309.33 3.2521
2024-02-14 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 107,741 813 0.76 38,427 2.59 3.0596
2023-11-21 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 106,928 -2,628 -2.40 37,457 0.26 3.2111
2023-08-14 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 109,556 -446 -0.41 37,359 9.99 3.0479
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 110,002 955 0.88 33,965 0.83 3.0412
2023-02-13 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 109,047 543 0.50 33,685 16.26 3.2120
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 108,504 -840 -0.77 28,973 -2.95 2.8598
2022-08-08 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 109,344 -1,085 -0.98 29,853 -23.40 2.6905
2022-05-13 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 110,429 -231 -0.21 38,971 17.78 2.8921
2022-02-14 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 110,660 1,232 1.13 33,087 10.78 2.2324
2021-11-15 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 109,428 1,971 1.83 29,867 0.01 2.1593
2021-08-09 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 107,457 -990 -0.91 29,864 7.79 2.1456
2021-05-14 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 108,447 666 0.62 27,705 10.86 2.1409
2021-02-12 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 107,781 -1,253 -1.15 24,991 7.64 2.0878
2020-11-16 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 109,034 -240 -0.22 23,218 19.02 2.2115
2020-08-12 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 109,274 1,451 1.35 19,507 -1.04 2.0514
2020-05-15 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 107,823 7,375 7.34 19,713 -13.35 2.4116
2020-02-14 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 100,448 1,617 1.64 22,751 10.66 2.4332
2019-11-14 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 98,831 7,737 8.49 20,559 5.87 2.3843
2019-08-09 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 91,094 3,169 3.60 19,419 9.94 2.2809
2019-05-14 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 87,925 73,077 492.17 17,663 482.55 2.2531
2019-02-13 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,848 766 5.44 3,032 0.56 0.4449
2018-11-13 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,082 0 0.00 3,015 14.73 0.3602
2018-08-10 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,082 -192 -1.35 2,628 -7.69 0.3412
2018-05-15 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,274 0 0.00 2,847 0.64 0.3703
2018-02-14 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,274 150 1.06 2,829 9.27 0.3445
2017-11-13 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,124 0 0.00 2,589 8.24 0.3097
2017-08-11 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,124 1,200 9.29 2,392 11.05 0.2972
2017-05-10 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,924 0 0.00 2,154 2.28 0.2722
2017-02-13 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,924 308 2.44 2,106 15.52 0.2704
2016-11-14 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,616 -860 -6.38 1,823 -6.56 0.2294
2016-08-10 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,476 95 0.71 1,951 2.79 0.2474
2016-05-13 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,381 0 0.00 1,898 7.41 0.2317
2016-02-16 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,381 -210 -1.55 1,767 -0.28 0.2022
2015-11-13 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,591 -121 -0.88 1,772 -5.04 0.2025
2015-08-14 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,712 -84 -0.61 1,866 -6.28 0.2066
2015-05-14 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,796 -40 -0.29 1,991 -4.14 0.2383
2015-02-13 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,836 -200 -1.42 2,077 7.12 0.2305
2014-11-14 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,036 -40 -0.28 1,939 8.87 0.2318
2014-08-14 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 14,076 800 6.03 1,781 7.35 0.2104
2014-05-13 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,276 250 1.92 1,659 7.45 0.2085
2014-02-14 2013-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,026 0 0.00 1,544 4.39 0.1927
2013-11-14 2013-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 13,026 5,728 78.49 1,479 81.03 0.1927
2013-08-14 2013-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 7,298 7,298 817 0.1204
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.