Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionMarathon Capital Management
Latest Disclosed Ownership11,281 shares
Latest Disclosed Value $ 5,405,855
Marathon Capital Management reports 0.34% decrease in ownership of BRKB / Berkshire Hathaway Inc.

On May 14, 2026 - Marathon Capital Management filed a 13F-HR form disclosing ownership of 11,281 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $5,405,855 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)
2026-05-14 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,281 -38 -0.34 5,406 -4.99 1.2141
2026-01-29 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,319 52 0.46 5,689 0.44 1.2244
2025-11-14 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,267 -79 -0.70 5,664 2.78 1.2962
2025-08-14 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,346 -162 -1.41 5,512 -10.07 1.4037
2025-05-15 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,508 -380 -3.20 6,129 13.73 1.6323
2025-02-14 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,888 43 0.36 5,389 -1.16 1.3459
2024-11-14 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,845 -50 -0.42 5,452 12.67 1.3217
2024-08-14 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 11,895 -671 -5.34 4,839 -8.44 1.2332
2024-05-15 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,566 -174 -1.37 5,284 16.31 1.2609
2024-02-14 2023-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,740 324 2.61 4,544 4.46 1.1421
2024-02-08 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,740 324 4,544 1.1421
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,416 157 1.28 4,349 4.04 1.0945
2023-08-15 2023-06-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,259 -5 -0.04 4,180 10.41 1.0319
2023-08-14 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,259 -5 4,180 1.0126
2023-05-12 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,264 -110 -0.89 3,787 -0.94 0.9318
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 12,374 100 0.81 3,822 16.63 1.0536
2022-11-14 2022-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 12,274 -25 -0.20 3,277 -2.41 0.9362
2022-08-12 2022-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 12,299 -112 -0.90 3,358 -23.33 1.0848
2022-05-13 2022-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 12,411 -180 -1.43 4,380 16.33 1.2573
2022-02-09 2021-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 12,591 1,149 10.04 3,765 20.56 0.8823
2021-11-15 2021-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 11,442 287 2.57 3,123 0.74 0.7090
2021-08-16 2021-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 11,155 -100 -0.89 3,100 7.83 0.7177
2021-05-14 2021-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 11,255 110 0.99 2,875 11.26 0.7579
2021-02-08 2020-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 11,145 -134 -1.19 2,584 7.62 0.7616
2020-11-16 2020-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 11,279 -207 -1.80 2,401 17.12 0.8740
2020-08-14 2020-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 11,486 -32 -0.28 2,050 -2.61 0.7874
2020-05-15 2020-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 11,518 190 1.68 2,105 -17.93 0.9665
2020-02-14 2019-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 11,328 8,884 363.50 2,565 404.92 0.8723
2019-11-13 2019-09-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 2,444 0 0.00 508 -2.31 0.2049
2019-07-25 2019-06-30 13F Berkshire Hathaway Cl B CL B NEW 084670702 2,444 184 8.14 520 14.54 0.2121
2019-05-15 2019-03-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 2,260 0 0.00 454 -1.52 0.2028
2019-02-07 2018-12-31 13F Berkshire Hathaway Cl B CL B NEW 084670702 2,260 388 20.73 461 73.31 0.2288
2016-05-13 2016-03-31 13F Berkshire Hathaway Cl B EQ 084670702 1,872 25 1.35 266 9.47 0.1377
2016-02-12 2015-12-31 13F Berkshire Hathaway Cl B EQ 084670702 1,847 0 0.00 243 0.83 0.1287
2015-11-12 2015-09-30 13F Berkshire Hathaway Cl B COM 084670702 1,847 -150 -7.51 241 -11.40 0.1224
2015-08-11 2015-06-30 13F Berkshire Hathaway Cl B COM 084670702 1,997 0 0.00 272 -5.56 0.1254
2015-05-06 2015-03-31 13F Berkshire Hathaway Cl B COM 084670702 1,997 0 0.00 288 -4.00 0.1277
2015-02-09 2014-12-31 13F Berkshire Hathaway Cl B COM 084670702 1,997 0 0.00 300 8.70 0.2764
2014-10-30 2014-09-30 13F Berkshire Hathaway Cl B COM 084670702 1,997 0 0.00 276 9.09 0.2487
2014-08-08 2014-06-30 13F Berkshire Hathaway Cl B COM 084670702 1,997 -50 -2.44 253 -1.17 0.2035
2014-04-30 2014-03-31 13F Berkshire Hathaway Cl B COM 084670702 2,047 0 0.00 256 5.35 0.1924
2014-01-28 2013-12-31 13F Berkshire Hathaway Cl B COM 084670702 2,047 10 0.49 243 5.19 0.1753
2013-11-04 2013-09-30 13F Berkshire Hathaway Cl B CLB 084670702 2,037 0 0.00 231 1.32 0.1984
2013-07-25 2013-06-30 13F Berkshire Hathaway Cl B CLB 084670702 2,037 2,037 228 0.1946
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.