GARDNER RUSSO & QUINN LLC BRK/B — BERKSHIRE HATHAWAY CL B COM

Ownership history in GARDNER RUSSO & QUINN LLC  ·  86 quarters on record

AI Ownership Summary

GARDNER RUSSO & QUINN LLC reported BERKSHIRE HATHAWAY CL B COM (BRK/B) in 86 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 7.05% in 2025 Q1. The latest visible filing shows BRK/B at 6.26% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this BRK/B ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was GARDNER RUSSO & QUINN LLC's position in BERKSHIRE HATHAWAY CL B COM, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

BRK/B was reported at 6.26% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
7.05% in 2025 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

BRK/B stock page GARDNER RUSSO & QUINN LLC fund profile GARDNER RUSSO & QUINN LLC full holdings
How GARDNER RUSSO & QUINN LLC held BRK/B — position size vs. price
% of Fund (quarterly)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 1,110,429 -14,966 -1.3% 6.26% $532.1M 2026-05-13 $469.32
2025 Q4 REDUCED — — — 1,125,395 -35,999 -3.1% 6.11% $565.7M 2026-02-12 $500.01
2025 Q3 ADDED — — — 1,161,394 +6,828 +0.6% 6.26% $583.9M 2025-11-12 $502.40
2025 Q2 REDUCED — — — 1,154,566 -26,042 -2.2% 5.96% $560.9M 2025-08-13 $477.31
2025 Q1 REDUCED — — — 1,180,608 -106,313 -8.3% 7.05% $628.8M 2025-05-13 $511.88
2024 Q4 REDUCED — — — 1,286,921 -55,983 -4.2% 6.59% $583.3M 2025-02-12 $471.73
2024 Q3 REDUCED — — — 1,342,904 -47,406 -3.4% 6.35% $618.1M 2024-11-13 $468.10
2024 Q2 REDUCED — — — 1,390,310 -74,221 -5.1% 5.97% $565.6M 2024-08-13 $432.41
2024 Q1 REDUCED — — — 1,464,531 -105,455 -6.7% 6.32% $615.9M 2024-05-14 $410.24
2023 Q4 REDUCED — — — 1,569,986 -48,164 -3.0% 5.71% $560.0M 2024-02-13 $394.80
76 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding BRK/B

As of 2026 Q1 — sorted by position size

TETRAD CORP 92.15% 1922 Investment Co LLC 3Y 7Y 84.86% CHECK CAPITAL MANAGEMENT INC/CA 3Y 7Y 52.8% Cook & Bynum Capital Management, LLC 3Y 7Y 42.7% Templeton & Phillips Capital Management, LLC 3Y 36.02% Aquamarine Zurich AG 3Y 34.57% Ardent Capital Management, Inc. 3Y 32.73% Asset Management Advisors, LLC 3Y 7Y 32.43% United American Securities Inc. (d/b/a UAS Asset Management) 3Y 7Y 31.97% Pacifica Capital Investments, LLC 3Y 7Y 30.79%

FAQ About GARDNER RUSSO & QUINN LLC and BRK/B

These are the practical questions this page is built to answer before you even open the full history table.

How long has GARDNER RUSSO & QUINN LLC reported owning BRK/B?

GARDNER RUSSO & QUINN LLC reported BRK/B across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported BRK/B position in GARDNER RUSSO & QUINN LLC's portfolio?

The largest reported portfolio weight for BRK/B was 7.05% in 2025 Q1.

What is the latest reported BRK/B position on this page?

The most recent filing on this page is 2026 Q1, when GARDNER RUSSO & QUINN LLC reported 1,110,429 shares, equal to 6.26% of portfolio, with an estimated market value of $532.1M.

What does the chart on this BRK/B ownership page compare?

The chart compares GARDNER RUSSO & QUINN LLC's quarterly BRK/B portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did GARDNER RUSSO & QUINN LLC time their BRK/B position?

Based on 13F filing dates vs. subsequent BRK/B price moves, GARDNER RUSSO & QUINN LLC correctly timed 47 out of 85 reported position changes (55%). The annualised alpha on BRK/B relative to SPY over the holding period was +7.6%.

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