Current position

Tom Russo’s Berkshire Hathaway Inc Del (BRK/A) position

Reported position history, portfolio importance and verified filing changes from public SEC disclosures.

Gardner Russo & Quinn · formerly Gardner Russo & GardnerVerified through Q2 2026
Relationship snapshot

At a glance

The full verified relationship, including prior ownership episodes and exits where supported.

First reportedQ1 2007Earliest verified positive filing snapshot
Latest statusCurrent positionBased on the latest supported relationship state
Peak shares5.11KHighest verified quarter-end share count
Quarters reported71Verified quarters with shares above zero
What happened?

Gardner Russo & Quinn · formerly Gardner Russo & Gardner first reported Berkshire Hathaway Inc Del in Q1 2007. After an earlier exit, the position later appeared again in a verified filing. The reported position was increased and reduced across later filings. Gardner Russo & Quinn · formerly Gardner Russo & Gardner currently reports 1.43K shares. The latest verified filing showed: Sold 1.9% of the position.

Verified SEC history

Position over time

See the same verified relationship through reported shares, portfolio weight or reported value.

Metric

Gaps indicate periods that cannot be safely connected or where a verified corporate action changes the raw share scale. Stock price, when available, is market context and not a transaction price.

Key filing events

What changed

Latest filing plus the most meaningful reported changes. Unchanged quarters are collapsed by default.

Q2 2026
Sold 1.9% of the position−28 shares · 1.43K shares remained
Filing context

Quarter-end price $748,850.00 · Estimated holding basis $339,590.13

Q1 2026
Sold 1.9% of the position−28 shares · 1.46K shares remained
Filing context

Quarter-end price $718,140.00 · Estimated holding basis $339,590.13

Q4 2025
Sold 3.4% of the position−53 shares · 1.49K shares remained
Filing context

Quarter-end price $754,800.00 · Estimated holding basis $339,590.13

Q3 2025
Sold 5.1% of the position−83 shares · 1.54K shares remained
Filing context

Quarter-end price $754,200.00 · Estimated holding basis $339,590.13

Q2 2025
Sold 2.0% of the position−33 shares · 1.62K shares remained
Filing context

Quarter-end price $728,800.00 · Estimated holding basis $339,590.13

Q1 2025
Sold 11.3% of the position−212 shares · 1.66K shares remained
Filing context

Quarter-end price $798,441.60 · Estimated holding basis $339,590.13

Portfolio importance

How important is Berkshire Hathaway Inc Del in Gardner Russo & Quinn · formerly Gardner Russo & Gardner’s reported portfolio?

Relative importance is measured only within the verified primary non-option reported portfolio for each quarter.

Current portfolio weight12.0%Q2 2026
Current rank#2of 85 reported positions
Peak portfolio weight19.1%Q1 2009
Best historical rank#1Q4 2007
At peak importanceQ1 2009
BRK/A
19.1%
Largest holding
19.1%
Cross-investor discovery

Who else owns Berkshire Hathaway Inc Del?

Also reported by 3 other tracked investors in their latest verified filings.

Guy SpierAquamarine Capital
BRK/A15.6% of reported portfolio
Christopher BloomstranSemper Augustus Investments Group LLC
BRK/A10.2% of reported portfolio
Joel GreenblattGotham Asset Management
BRK/A0.0% of reported portfolio
Explore Berkshire Hathaway Inc Del across all tracked investors →
SEC evidence & methodology

SEC filing evidence

Market context and filing-derived values are kept separate from actual transaction prices, which 13F filings do not disclose.

Latest verified stock price$763,600.002026-09-18

Market context only; not an investor transaction price.

Latest filing quarter-end price$748,850.00Q2 2026

Derived from validated reported value and shares where supported.

Estimated holding basis$339,590.13Historical reference — not actual purchase price

Calculated from supported filing history.

Latest verified investor filingQ2 2026 · filed 2026-08-13
Open SEC filing ↗

This tracker follows the current SEC filer, Gardner Russo & Quinn LLC (formerly Gardner Russo & Gardner), not Tom Russo’s personal brokerage account. Form 13F reports quarter-end U.S.-listed positions and certain options, but it does not reveal exact trade dates, execution prices, short positions or the purpose of an option position.