BERKSHIRE HATHAWAY INC-CL B · CUSIP 084670702 · CIK 936944
As of 2026-06-30, MARTINGALE ASSET MANAGEMENT L P reported 85.34K BRK.B (shares), valued at $42.71M, or 1.01% of its reported non-derivative portfolio. Filed 2026-08-13.
Verify history & sources →Shares increased 1.64%; reported value increased 6.13%, and weight changed +0.00 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.
Left: % · Right: Shares · Independently scaled axes
Exact data and methodology
Axes scale independently; a crossing does not mean equal values. Weight uses each quarter's total reported non-derivative value. Same CUSIP; missing quarters are gaps, not zero. Revised history may include later disclosures.
| Quarter | Weight | Quantity | Source |
|---|---|---|---|
| Q2 2026 | 1.01% | 85,344 | SEC filing ↗Filed Aug 13, 2026 |
| Q1 2026 | 1.01% | 83,968 | SEC filing ↗Filed May 13, 2026 |
| Q4 2025 | 1.06% | 82,605 | SEC filing ↗Filed Feb 13, 2026 |
| Q3 2025 | 1.07% | 84,830 | SEC filing ↗Filed Nov 13, 2025 |
| Q2 2025 | 1.18% | 99,300 | SEC filing ↗Filed Aug 11, 2025 |
| Q1 2025 | 1.38% | 101,921 | SEC filing ↗Filed May 14, 2025 |
| Q4 2024 | 1.24% | 112,835 | SEC filing ↗Filed Feb 13, 2025 |
| Q3 2024 | 1.25% | 118,642 | SEC filing ↗Filed Nov 14, 2024 |
| Q2 2024 | 1.21% | 138,129 | SEC filing ↗Filed Aug 12, 2024 |
| Q1 2024 | 1.25% | 148,787 | SEC filing ↗Filed May 14, 2024 |
| Q4 2023 | 1.14% | 157,070 | SEC filing ↗Filed Feb 12, 2024 |
| Q3 2023 | 1.17% | 158,361 | SEC filing ↗Filed Nov 14, 2023 |
History & evidence by quarter
| Quarter | Weight | Quantity | Value | Change explained | Source |
|---|---|---|---|---|---|
| Q3 2023 | 1.17% | 158,361 | $55.47M | The prior quarter is outside the free window. Sign in for the comparison. | SEC filing ↗ Filed Nov 14, 2023 |
| Q4 2023 | 1.14% | 157,070 | $56.02M | Shares decreased 0.82%; reported value increased 0.99%, and weight changed -0.03 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 12, 2024 |
| Q1 2024 | 1.25% | 148,787 | $62.57M | Shares decreased 5.27%; reported value increased 11.69%, and weight changed +0.11 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 14, 2024 |
| Q2 2024 | 1.21% | 138,129 | $56.19M | Shares decreased 7.16%; reported value decreased 10.19%, and weight changed -0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 12, 2024 |
| Q3 2024 | 1.25% | 118,642 | $54.61M | Shares decreased 14.11%; reported value decreased 2.82%, and weight changed +0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Nov 14, 2024 |
| Q4 2024 | 1.24% | 112,835 | $51.15M | Shares decreased 4.89%; reported value decreased 6.34%, and weight changed -0.01 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 13, 2025 |
| Q1 2025 | 1.38% | 101,921 | $54.28M | Shares decreased 9.67%; reported value increased 6.13%, and weight changed +0.14 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 14, 2025 |
| Q2 2025 | 1.18% | 99,300 | $48.24M | Shares decreased 2.57%; reported value decreased 11.13%, and weight changed -0.20 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 11, 2025 |
| Q3 2025 | 1.07% | 84,830 | $42.65M | Shares decreased 14.57%; reported value decreased 11.59%, and weight changed -0.11 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Nov 13, 2025 |
| Q4 2025 | 1.06% | 82,605 | $41.52M | Shares decreased 2.62%; reported value decreased 2.64%, and weight changed -0.01 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Feb 13, 2026 |
| Q1 2026 | 1.01% | 83,968 | $40.24M | Shares increased 1.65%; reported value decreased 3.09%, and weight changed -0.05 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed May 13, 2026 |
| Q2 2026 | 1.01% | 85,344 | $42.71M | Shares increased 1.64%; reported value increased 6.13%, and weight changed +0.00 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds. | SEC filing ↗ Filed Aug 13, 2026 |
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Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.