Historical position

Warren Buffett’s Mueller Inds Inc (MLI) position

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

Berkshire HathawayVerified through Q2 2026
Relationship snapshot

At a glance

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

First reportedQ4 2001Earliest verified positive filing snapshot
Latest statusHistorical positionBased on the latest supported relationship state
Peak shares3.22MHighest verified quarter-end share count
Quarters reported15Verified quarters with shares above zero
What happened?

Berkshire Hathaway first reported Mueller Inds Inc in Q4 2001. The reported position was reduced across later filings. Verified positive position history runs through Q4 2005. The current relationship status cannot be determined reliably from supported data.

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.

Q1 2006
Sold the entire position−784.50K shares · No shares reported at quarter-end
Q4 2005
Sold 7.9% of the position−67.30K shares · 784.50K shares remained
Filing context

Quarter-end price $27.42 · Estimated holding basis $42.95

Q1 2005
Sold 37.5% of the position−510.10K shares · 851.80K shares remained
Filing context

Quarter-end price $28.15 · Estimated holding basis $42.95

Q4 2003
Sold 1.4% of the position−34.00K shares · 2.45M shares remained
Filing context

Quarter-end price $34.36 · Estimated holding basis $31.75

Q2 2002
New position+2.48M shares · 2.48M shares reported
Filing context

Quarter-end price $31.75 · Estimated holding basis $31.75

Q1 2002
Sold the entire position−3.22M shares · No shares reported at quarter-end

9 unchanged quarters are collapsed by default.

Portfolio importance

How important was Mueller Inds Inc in Berkshire Hathaway’s reported portfolio?

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

Last reported portfolio weight0.1%Q4 2005
Last reported rank#34of 34 reported positions
Peak portfolio weight0.4%Q4 2001
Best historical rank#19Q4 2001
At peak importanceQ4 2001
MLI
0.4%
Largest holding
33.6%
Cross-investor discovery

Who else owns Mueller Inds Inc?

Also reported by 2 other tracked investors in their latest verified filings.

Joel GreenblattGotham Asset Management
MLI0.1% of reported portfolio
Ray DalioBridgewater Associates, LP
MLI0.0% of reported portfolio
Explore Mueller Inds Inc 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$60.002026-09-14

Market context only; not an investor transaction price.

Latest verified investor filingQ2 2026 · filed 2026-08-14
Open SEC filing ↗

This tracker follows Berkshire Hathaway’s Form 13F disclosures. It is not Warren Buffett’s personal brokerage account, and 13F filings do not reveal exact trade dates or execution prices.