Manager × security

M&T Bank Corp BRK.A holdings history

BERKSHIRE HATHAWAY INC-CL A · CUSIP 084670108 · CIK 36270

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Citable facts

As of 2026-06-30, M&T Bank Corp reported 35 BRK.A (shares), valued at $26.21M, or 0.08% of its reported non-derivative portfolio. Filed 2026-08-04.

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Portfolio weight and quantity history
Reported portfolio weight
0.08%
Shares
35
35
Reported value
$26.21M
USD

Shares increased 66.67%; reported value increased 73.79%, and weight changed +0.03 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.

QuarterWeightQuantitySource
Q2 20260.08%35SEC filingFiled Aug 4, 2026
Q1 20260.05%21SEC filingFiled Sep 4, 2026Amended
Q4 20250.05%21SEC filingFiled Jan 30, 2026Amended
Q3 20250.06%23SEC filingFiled Nov 14, 2025
Q2 20250.06%23SEC filingFiled Aug 13, 2025
Q1 20250.10%36SEC filingFiled Apr 30, 2025
Q4 202484.58%296,141SEC filingFiled Feb 6, 2025
Q3 20240.10%42SEC filingFiled Nov 19, 2024Amended
Q2 20240.11%51SEC filingFiled Jul 31, 2024
Q1 20240.08%35SEC filingFiled May 7, 2024
Q4 20230.07%37SEC filingFiled Feb 6, 2024
Q3 20230.07%31SEC filingFiled Nov 2, 2023

History & evidence by quarter

QuarterWeightQuantityValueChange explainedSource
Q3 20230.07%31$16.48MThe prior quarter is outside the free window. Sign in for the comparison.SEC filing
Filed Nov 2, 2023
Q4 20230.07%37$20.08MShares increased 19.35%; reported value increased 21.86%, and weight changed +0.00 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Feb 6, 2024
Q1 20240.08%35$22.21MShares decreased 5.41%; reported value increased 10.60%, and weight changed +0.01 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed May 7, 2024
Q2 20240.11%51$31.22MShares increased 45.71%; reported value increased 40.62%, and weight changed +0.03 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Jul 31, 2024
Q3 20240.10%42$29.03MShares decreased 17.65%; reported value decreased 7.03%, and weight changed -0.01 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Nov 19, 2024
Q4 202484.58%296,141$162.81BShares increased 704997.62%; reported value increased 560757.97%, and weight changed +84.48 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Feb 6, 2025
Q1 20250.10%36$28.74MShares decreased 99.99%; reported value decreased 99.98%, and weight changed -84.48 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Apr 30, 2025
Q2 20250.06%23$16.76MShares decreased 36.11%; reported value decreased 41.68%, and weight changed -0.04 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Aug 13, 2025
Q3 20250.06%23$17.35MShares unchanged; reported value increased 3.49%, and weight changed +0.00 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Nov 14, 2025
Q4 20250.05%21$15.85MShares decreased 8.70%; reported value decreased 8.62%, and weight changed -0.01 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Jan 30, 2026
Q1 20260.05%21$15.08MShares unchanged; reported value decreased 4.86%, and weight changed +0.00 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Sep 4, 2026
Q2 20260.08%35$26.21MShares increased 66.67%; reported value increased 73.79%, and weight changed +0.03 pp. Weight depends on both the security valuation and total portfolio value, not trade proceeds.SEC filing
Filed Aug 4, 2026
M&T Bank Corp · BERKSHIRE HATHAWAY INC-CL A

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This page includes 12 of 12 reported holdings. Sign in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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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.

13F reports quarter-end long positions in securities traded on US exchanges, filed by managers holding at least $100 million of such securities; it is not the manager's full portfolio, not assets under management, and value changes are not returns. Weights use the reported total value as denominator. Option rows show notional value, not premium or net exposure. Amendments are merged into the quarter when Akkru could match them.