Ernest E. Maddock serves as Executive at LAM RESEARCH CORP, where they oversee executive responsibilities. Since joining the company, Ernest E. Maddock has executed 76 insider transactions totaling $3.3M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 17, 2025 involved transacting 2 shares valued at $0.
Ernest E. Maddock currently holds 9,595 shares of LAM RESEARCH CORP (LRCX), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Ernest E. Maddock has been a net seller of LRCX stock. They have purchased $731.3K and sold $2.6M worth of shares.
Ernest E. Maddock's most recent insider trade was on Dec 17, 2025, when they sold 2 shares at $0.00 per share.
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| $N/A |
| Discretionary |
| Sep 27, 2024 | TER | $0 | Other | 2 | $N/A | Discretionary |
| Aug 16, 2024 | OUST | $62.3K | Purchase | 8,000 | $7.79 | Discretionary |
| Jun 21, 2024 | OUST | $0 | Award | 15,195 | $N/A | Discretionary |
| Jun 14, 2024 | TER | $0 | Other | 2 | $N/A | Discretionary |
| May 22, 2024 | UCTT | $0 | Award | 3,647 | $N/A | Discretionary |
| May 9, 2024 | TER | $0 | Award | 1,876 | $N/A | Discretionary |
| Feb 1, 2024 | TER | $94.1K | Purchase | 1,000 | $94.07 | Discretionary |
| Nov 15, 2023 | OUST | $37.0K | Purchase | 7,000 | $5.29 | Discretionary |
| Aug 21, 2023 | OUST | $42.1K | Purchase | 7,000 | $6.02 | Discretionary |
| May 17, 2023 | UCTT | $0 | Award | 5,296 | $N/A | Discretionary |
| May 12, 2023 | TER | $0 | Award | 2,530 | $N/A | Discretionary |
| Feb 10, 2023 | VLDR | $0 | Disposition | 162,126 | $N/A | Discretionary |
| Feb 10, 2023 | VLDR | $0 | Option Exercise | 20,732 | $N/A | Discretionary |
| Feb 10, 2023 | OUST | $0 | Award | 186,254 | $N/A | Discretionary |
| Feb 10, 2023 | OUST | $0 | Award | 133,007 | $N/A | Discretionary |
| Jan 23, 2023 | VLDR | $0 | Option Exercise | 10,366 | $N/A | Discretionary |
| Nov 14, 2022 | TER | $0 | Award | 1,198 | $N/A | Discretionary |
| Jun 16, 2022 | VLDR | $0 | Award | 111,028 | $N/A | Discretionary |
| May 19, 2022 | UCTT | $0 | Award | 3,701 | $N/A | Discretionary |
| Mar 7, 2022 | VLDR | $23.5K | Purchase | 10,000 | $2.35 | Discretionary |
| Mar 4, 2022 | VLDR | $26.4K | Purchase | 10,000 | $2.64 | Discretionary |
| Jan 3, 2022 | AVT | $0 | Award | 3,856 | $N/A | Discretionary |
| Aug 25, 2021 | AVT | $56.5K | Award | 1,409 | $40.12 | Discretionary |
| May 20, 2021 | UCTT | $0 | Award | 2,699 | $N/A | Discretionary |
| Jun 2, 2020 | UCTT | $0 | Award | 6,301 | $N/A | Discretionary |
| May 23, 2019 | UCTT | $0 | Award | 9,969 | $N/A | Discretionary |
| Jul 31, 2018 | UCTT | $13.4K | Purchase | 1,000 | $13.40 | Discretionary |
| Jun 1, 2018 | UCTT | $0 | Award | 5,430 | $N/A | Discretionary |