Current position

David Tepper’s Lam Research Corp (LRCX) 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 reportedQ4 2024Earliest verified positive filing snapshot
Latest statusCurrent positionBased on the latest supported relationship state
Peak shares1.25MHighest verified quarter-end share count
Quarters reported7Verified quarters with shares above zero
What happened?

Appaloosa LP first reported Lam Research Corp in Q4 2024. The reported position was increased and reduced across later filings. Appaloosa LP currently reports 382.50K shares. The latest verified filing showed: No change.

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
No change382.50K shares reported
Filing context

Quarter-end price $433.33 · Estimated holding basis $85.04

Q1 2026
Sold 10.0% of the position−42.50K shares · 382.50K shares remained
Filing context

Quarter-end price $213.66 · Estimated holding basis $85.04

Q4 2025
Bought 14.9% more+55.00K shares · 425.00K shares reported after the change
Filing context

Quarter-end price $171.18 · Estimated holding basis $85.04

Q3 2025
Sold 7.5% of the position−30.00K shares · 370.00K shares remained
Filing context

Quarter-end price $133.90 · Estimated holding basis $72.23

Q2 2025
Sold 20.0% of the position−100.00K shares · 400.00K shares remained
Filing context

Quarter-end price $97.34 · Estimated holding basis $72.23

Q1 2025
Sold 60.0% of the position−750.00K shares · 500.00K shares remained
Filing context

Quarter-end price $72.70 · Estimated holding basis $72.23

Portfolio importance

How important is Lam Research Corp in Appaloosa LP’s reported portfolio?

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

Current portfolio weight2.2%Q2 2026
Current rank#13of 25 reported positions
Peak portfolio weight2.2%Q2 2026
Best historical rank#13Q2 2026
At peak importanceQ2 2026
LRCX
2.2%
Largest holding
16.0%
Cross-investor discovery

Who else owns Lam Research Corp?

Also reported by 4 other tracked investors in their latest verified filings.

Chase ColemanTiger Global Management LLC
LRCX5.7% of reported portfolio
Ray DalioBridgewater Associates, LP
LRCX1.7% of reported portfolio
Stanley DruckenmillerDuquesne Family Office
LRCX0.4% of reported portfolio
Explore Lam Research Corp 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$288.112026-09-18

Market context only; not an investor transaction price.

Latest filing quarter-end price$433.33Q2 2026

Derived from validated reported value and shares where supported.

Estimated holding basis$85.04Historical reference — not actual purchase price

Calculated from supported filing history.

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.