Exited position

Warren Buffett’s Union Pacific (UNP) 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 reportedQ3 2006Earliest verified positive filing snapshot
Latest statusExited positionBased on the latest supported relationship state
Peak shares10.51MHighest verified quarter-end share count
Quarters reported11Verified quarters with shares above zero
What happened?

Berkshire Hathaway first reported Union Pacific in Q3 2006. The reported position was increased across later filings. The latest verified relationship event shows that Berkshire Hathaway sold the entire position in Q4 2009, and the stock is no longer reported in the latest verified portfolio.

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.

Q4 2009
Sold the entire position−9.56M shares · No shares reported at quarter-end
Q1 2009
Bought 7.3% more+652.00K shares · 9.56M shares reported after the change
Filing context

Quarter-end price $41.11 · Estimated holding basis $90.65

Q2 2008
Bought 100.0% more+4.45M shares · 8.91M shares reported after the change
Filing context

Quarter-end price $75.50 · Estimated holding basis $94.28

Q3 2007
New position+4.45M shares · 4.45M shares reported
Filing context

Quarter-end price $113.06 · Estimated holding basis $113.06

Q2 2007
Sold the entire position−10.51M shares · No shares reported at quarter-end

6 unchanged quarters are collapsed by default.

Portfolio importance

How important was Union Pacific 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 weight1.0%Q3 2009
Last reported rank#14of 43 reported positions
Peak portfolio weight1.9%Q1 2007
Best historical rank#12Q1 2007
At peak importanceQ1 2007
UNP
1.9%
Largest holding
16.7%
Cross-investor discovery

Who else owns Union Pacific?

Also reported by 5 other tracked investors in their latest verified filings.

Seth KlarmanBaupost Group
UNP6.0% of reported portfolio
Daniel LoebThird Point LLC
UNP2.0% of reported portfolio
Ray DalioBridgewater Associates, LP
UNP0.6% of reported portfolio
Explore Union Pacific 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$279.372026-09-18

Market context only; not an investor transaction price.

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

View Union Pacific stock page →

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.