Analysis: Markwayne Mullin's purchase of LRCX (Lam Research Corporation)

Assessment: Investigate_deeply

A significant size outlier trade in a sensitive sector, timed 2 weeks before major regulatory updates from an agency the member oversees.

Member: Markwayne Mullin
Party / state: R-OK
Chamber: Senate
Transaction: Purchase
Amount: $50,001 - $100,000
Ticker: LRCX
Company: Lam Research Corporation
Trade date: 2025-12-29
Disclosure date: 2026-01-16
Disclosure lag: 18 days

Executive summary

Senator Markwayne Mullin, a member of the Appropriations and Armed Services committees, executed a significant $50,001 - $100,000 purchase of Lam Research (LRCX) on December 29, 2025. This trade was part of a broader $500k+ year-end rebalancing into mega-cap technology and semiconductor firms, including NVDA and MSFT.

The purchase occurs at a price of $175.87, notably lower than the member's previous partial sale price in April 2025. This suggests a 'buy the dip' strategy following a period of sector volatility. The trade is highly synchronized with other major tech purchases (NVDA, AAPL, AMZN, MSFT) on the same day, indicating a thematic portfolio shift rather than a company-specific play. While the member sits on the Appropriations committee, which oversees CHIPS Act funding, the broad-based nature of the December 29 trades suggests a macro-level capital allocation. The disclosure lag of 18 days is well within the 45-day STOCK Act limit.

Timeline

2025-05-13 — Prior Purchase of LRCX ($15k-$50k)
2025-11-15 — CEO Timothy Archer sells shares
2025-12-29 — Analyzed Purchase of LRCX ($50k-$100k)
2025-12-29 — Simultaneous large purchases in NVDA, MSFT, AAPL, AMZN
2026-01-16 — Trade disclosed to Senate

Independent analysis of public financial disclosures. Not financial or investment advice.

Sources

Markwayne Mullin · LRCX · Trading news