- Corporate Officers - M
- Maddock Ernest E
Insider Trading History of Maddock Ernest E
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Maddock Ernest E since 2010.
This trader's CIK number is 1227050.
At the time of last reporting, Maddock Ernest E was the Officer of Ultra Clean Holdings, Inc.. (stock ticker symbol UCTT).
Also see all insider trading activities at Ultra Clean Holdings, Inc..
Note that in the past
MADDOCK ERNEST E also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Teradyne, Inc (TER) by Maddock Ernest E
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2024 | TER | 1,000 | $94,070 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Velodyne Lidar, Inc. (VLDR) by Maddock Ernest E
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2023 | VLDR | 0 | $0 | 0 | $0 | 20,732 | $0 |
| 2022 | VLDR | 20,000 | $49,900 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Ultra Clean Holdings, Inc. (UCTT) by Maddock Ernest E
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | UCTT | 10,000 | $242,900 | 0 | $0 | 0 | $0 |
| 2018 | UCTT | 1,000 | $13,404 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Intersil Corp/de (ISIL) by Maddock Ernest E
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2016 | ISIL | 0 | $0 | 0 | $0 | 8,828 | $0 |
Yearly summary of insider trading at Lam Research Corp (LRCX) by Maddock Ernest E
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2013 | LRCX | 0 | $0 | 24,480 | $1,027,642 | 24,480 | $494,740 |
| 2011 | LRCX | 0 | $0 | 25,000 | $1,416,175 | 25,000 | $505,250 |
| 2010 | LRCX | 0 | $0 | 3,050 | $152,500 | 0 | $0 |
Yearly summary of insider trading at Micron Technology Inc (MU) by Maddock Ernest E
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2017 | MU | 3,400 | $94,822 | 0 | $0 | 0 | $0 |
| 2016 | MU | 10,000 | $106,940 | 0 | $0 | 0 | $0 |
| 2015 | MU | 15,000 | $230,700 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Ouster, Inc. (OUST) by Maddock Ernest E
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2024 | OUST | 8,000 | $62,320 | 0 | $0 | 0 | $0 |
| 2023 | OUST | 14,000 | $79,149 | 0 | $0 | 0 | $0 |
Insider trading activities at 7 companies by Maddock Ernest E:
1. Teradyne, Inc (TER)
2. Velodyne Lidar, Inc. (VLDR)
3. Ultra Clean Holdings, Inc. (UCTT)
4. Intersil Corp/de (ISIL)
5. Lam Research Corp (LRCX)
6. Micron Technology Inc (MU)
7. Ouster, Inc. (OUST)
Table 1. Insider trading of Teradyne, Inc (TER) by Maddock Ernest E
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2024-02-01 | TER | Buy | 1,000 | 94.07 | 94,070 |
Table 2. Insider trading of Velodyne Lidar, Inc. (VLDR) by Maddock Ernest E
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2023-02-10 | VLDR | Option Ex | 20,732 | .00 | 0 |
| 2022-03-04 | VLDR | Buy | 10,000 | 2.64 | 26,400 |
| 2022-03-07 | VLDR | Buy | 10,000 | 2.35 | 23,500 |
Table 3. Insider trading of Ultra Clean Holdings, Inc. (UCTT) by Maddock Ernest E
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-03-07 | UCTT | Buy | 10,000 | 24.29 | 242,900 |
| 2018-07-31 | UCTT | Buy | 1,000 | 13.40 | 13,404 |
Table 4. Insider trading of Intersil Corp/de (ISIL) by Maddock Ernest E
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2016-07-07 | ISIL | Option Ex | 2,081 | .00 | 0 |
| 2016-04-20 | ISIL | Option Ex | 6,747 | .00 | 0 |
Table 5. Insider trading of Lam Research Corp (LRCX) by Maddock Ernest E
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2013-02-05 | LRCX | Sale | 12,030 | 42.28 | 508,664 |
| 2013-02-05 | LRCX | Option Ex | 12,030 | 20.21 | 243,126 |
| 2013-01-28 | LRCX | Option Ex | 12,450 | 20.21 | 251,614 |
| 2013-01-28 | LRCX | Sale | 12,450 | 41.69 | 518,978 |
| 2011-03-02 | LRCX | Option Ex | 25,000 | 20.21 | 505,250 |
| 2011-03-02 | LRCX | Sale | 25,000 | 56.65 | 1,416,175 |
| 2010-12-07 | LRCX | Sale | 3,050 | 50.00 | 152,500 |
Table 6. Insider trading of Micron Technology Inc (MU) by Maddock Ernest E
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2017-08-11 | MU | Buy | 3,400 | 27.89 | 94,822 |
| 2016-01-21 | MU | Buy | 10,000 | 10.69 | 106,940 |
| 2015-12-24 | MU | Buy | 10,000 | 14.32 | 143,200 |
| 2015-07-09 | MU | Buy | 5,000 | 17.50 | 87,500 |
Table 7. Insider trading of Ouster, Inc. (OUST) by Maddock Ernest E
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2024-08-16 | OUST | Buy | 8,000 | 7.79 | 62,320 |
| 2023-11-15 | OUST | Buy | 7,000 | 5.29 | 37,009 |
| 2023-08-21 | OUST | Buy | 7,000 | 6.02 | 42,140 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Maddock Ernest E
(Officer of Ultra Clean Holdings, Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.