Berkshire Hathaway Inc.
MX ˙ BMV
SecurityMX:BRKB / Berkshire Hathaway Inc.
InstitutionBaader Bank INC
Latest Disclosed Ownership2,688 shares
Latest Disclosed Value $ 1,100,887
Baader Bank INC ownership in BRKB / Berkshire Hathaway Inc.

On May 8, 2026 - Baader Bank INC filed a 13F-HR form disclosing ownership of 2,688 shares of Berkshire Hathaway Inc. (MX:BRKB) valued at $1,100,887 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 6,086 shares of Berkshire Hathaway Inc.. This represents a change in shares of -55.83% during the quarter.

Baader Bank INC has a history of taking positions in derivatives of the underlying security (BRKB) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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)
2026-05-08 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 2,688 -3,398 -55.83 1,101 -61.71 0.0860
2026-02-05 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,086 -452 -6.91 2,874 -4.71 0.1976
2025-11-06 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 6,538 -3,626 -35.67 3,016 -38.05 0.1959
2025-07-10 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 10,164 -18,813 -64.92 4,867 -68.02 0.3499
2025-05-08 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 28,977 1,575 5.75 15,221 22.55 1.1403
2025-01-23 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 27,402 -4,059 -12.90 12,421 -12.72 0.8103
2024-10-29 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 31,461 3,184 11.26 14,230 25.50 0.8322
2024-07-17 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 28,277 -4,418 -13.51 11,340 -17.52 0.7187
2024-05-03 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 32,695 -1,336 -3.93 13,749 13.49 0.9785
2024-02-08 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 34,031 -7,770 -18.59 12,115 -16.65 0.8787
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 41,801 1,180 2.90 14,534 5.90 0.9811
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 40,621 -534 -1.30 13,725 9.10 0.6939
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 41,155 1,908 4.86 12,579 3.76 0.6406
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY CL B NEW 084670702 39,247 17 0.04 12,123 15.73 0.5861
2023-05-04 2022-09-30 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 39,230 -66,455 -62.88 10,475 -63.70 0.6750
2022-11-14 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 39,230 -66,455 10,475 0.8905
2022-08-11 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 105,685 -6,792 -6.04 28,855 -27.31 2.2229
2022-09-06 2022-03-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 112,477 0 0.00 39,695 18.03 3.1797
2022-05-18 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 112,477 0 39,695 3.1797
2022-09-06 2021-12-31 13F/A-1 BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 112,477 112,477 33,631 2.5848
2022-05-17 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 112,477 112,477 33,631 2.5848
Disclosed Call 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
(%)
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Call 33,100 11,287 n/a n/a n/a
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY CL B NEW Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY CL B NEW Call 66,200 20,460 n/a n/a n/a
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
(%)
2025-07-10 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-08 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 14,200 -20.22 7,563 -6.27 n/a n/a n/a
2025-01-23 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 17,800 -55.50 8,068 -56.18 n/a n/a n/a
2024-10-29 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 40,000 18,410 n/a n/a n/a
2024-07-17 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-03 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 12,800 14.29 5,383 34.75 n/a n/a n/a
2024-02-08 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 11,200 -66.16 3,995 -65.55 n/a n/a n/a
2023-11-14 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 33,100 0.00 11,595 2.72 n/a n/a n/a
2023-08-11 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 33,100 0.00 11,287 10.44 n/a n/a n/a
2023-05-15 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW Put 33,100 0.00 10,220 -0.09 n/a n/a n/a
2023-02-14 2022-12-31 13F BERKSHIRE HATHAWAY CL B NEW Put 33,100 0.00 10,230 15.74 n/a n/a n/a
2023-05-04 2022-09-30 13F/A BERKSHIRE HATHAWAY INC DEL CL B NEW Put 33,100 8,838 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.