Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionCovestor Ltd
Latest Disclosed Ownership1,932 shares
Latest Disclosed Value $ 926
Covestor Ltd ownership in BRKB / Berkshire Hathaway Inc.

On May 5, 2026 - Covestor Ltd filed a 13F-HR form disclosing ownership of 1,932 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $926 USD as of March 31, 2026.

Covestor Ltd has a history of taking positions in derivatives of the underlying security (BRKB) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:BRKB / Berkshire Hathaway Inc. Historical Put/Call Ratio
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-CL B COMMON 084670702 1,932 595 44.50 1 0.6415
2026-02-06 2025-12-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,337 -332 -19.89 1 0.3524
2025-10-30 2025-09-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,669 7 0.42 1 0.4628
2025-08-11 2025-06-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,662 -350 -17.40 1 -100.00 0.4766
2025-05-12 2025-03-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 2,012 119 6.29 1 0.7158
2025-02-13 2024-12-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,893 39 2.10 1 0.5373
2024-11-01 2024-09-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,854 -142 -7.11 1 0.5353
2024-08-09 2024-06-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,996 794 66.06 1 0.5253
2024-05-10 2024-03-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,202 34 2.91 1 0.3214
2024-02-09 2023-12-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,168 14 1.21 0 0.2851
2023-11-13 2023-09-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,154 61 5.58 0 0.3054
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,093 -50 -4.37 0 0.2840
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 1,143 -2,108 -64.84 0 -100.00 0.3075
2023-02-14 2022-12-31 13F/A-1 BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 3,251 84 2.65 1,004 18.68 0.8187
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 3,251 84 1,004 818.7096
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY INC-CL B COMMON 084670702 3,167 1,381 77.32 846 73.36 0.7454
2022-08-10 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,786 -92 -4.90 488 -26.40 0.3865
2022-05-13 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,878 830 79.20 663 111.82 0.4413
2022-02-10 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 1,048 1,048 313 0.4386
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2026-05-05 2026-03-31 13F BRK B 17APR26 420 P COMMON Put 0 -100.00 0 n/a n/a n/a
2026-02-06 2025-12-31 13F BRK B 17APR26 420 P COMMON Put 2 0.00 0 n/a n/a n/a
2025-10-30 2025-09-30 13F BRK B 17OCT25 390 P COMMON Put 2 0.00 0 n/a n/a n/a
2025-08-11 2025-06-30 13F BRK B 17OCT25 390 P COMMON Put 2 0 n/a n/a n/a
2025-05-12 2025-03-31 13F BRK B 20JUN25 415 P COMMON Put 0 -100.00 0 n/a n/a n/a
2025-02-13 2024-12-31 13F BRK B 20JUN25 415 P COMMON Put 2 0 n/a n/a n/a
2023-05-15 2023-03-31 13F BRK B 06JAN23 305 P COMMON Put 0 -100.00 0 n/a n/a n/a
2023-02-14 2022-12-31 13F/A BRK B 06JAN23 305 P COMMON Put 11 0 n/a n/a n/a
2023-02-14 2022-12-31 13F BRK B 06JAN23 305 P COMMON Put 11 0 n/a n/a n/a
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.