Exited position

David Tepper’s Thermo Fisher Scientific Inc (TMO) position

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

Appaloosa LPVerified through Q2 2026
Relationship snapshot

At a glance

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

First reportedQ1 2017Earliest verified positive filing snapshot
Latest statusExited positionBased on the latest supported relationship state
Peak shares597.00KHighest verified quarter-end share count
Quarters reported7Verified quarters with shares above zero
What happened?

Appaloosa LP first reported Thermo Fisher Scientific Inc in Q1 2017. The reported position was increased and reduced across later filings. The latest verified relationship event shows that Appaloosa LP sold the entire position in Q4 2018, 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 2018
Sold the entire position−187.00K shares · No shares reported at quarter-end
Q3 2018
Sold 68.0% of the position−398.00K shares · 187.00K shares remained
Filing context

Quarter-end price $244.08 · Estimated holding basis $175.58

Q2 2018
Sold 2.0% of the position−12.00K shares · 585.00K shares remained
Filing context

Quarter-end price $207.14 · Estimated holding basis $175.58

Q1 2018
Bought 4.4% more+25.00K shares · 597.00K shares reported after the change
Filing context

Quarter-end price $206.46 · Estimated holding basis $175.58

Q4 2017
Sold 3.4% of the position−20.00K shares · 572.00K shares remained
Filing context

Quarter-end price $189.88 · Estimated holding basis $174.23

Q3 2017
Bought 57.9% more+217.00K shares · 592.00K shares reported after the change
Filing context

Quarter-end price $189.20 · Estimated holding basis $174.23

Portfolio importance

How important was Thermo Fisher Scientific Inc in Appaloosa LP’s reported portfolio?

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

Last reported portfolio weight0.8%Q3 2018
Last reported rank#30of 37 reported positions
Peak portfolio weight1.6%Q3 2017
Best historical rank#16Q2 2018
At peak importanceQ3 2017
TMO
1.6%
Largest holding
9.7%
Cross-investor discovery

Who else owns Thermo Fisher Scientific Inc?

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

Stanley DruckenmillerDuquesne Family Office
TMO0.2% of reported portfolio
Joel GreenblattGotham Asset Management
TMO0.2% of reported portfolio
Ray DalioBridgewater Associates, LP
TMO0.0% of reported portfolio
Explore Thermo Fisher Scientific 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$609.822026-09-11

Market context only; not an investor transaction price.

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

This tracker follows Appaloosa LP’s Form 13F disclosures—not David Tepper’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.