Ernest E Maddock
Director at Teradyne, Inc (TER) since November 2022
Ernest E Maddock has filed 60 insider reports with the SEC since May 2021, as director at Teradyne, Inc (TER), director at Avnet Inc (AVT) and director at Ouster, Inc. (OUST) and at 2 more companies. Ernest E Maddock made no open-market purchases or sales in the last 12 months. The latest filing, on September 28, 2026, reports other acquisition or disposition at Teradyne, Inc (TER).
- Filings
- 60
- Companies
- 5
- Bought on market
- $528K
- Sold on market
- None
Companies where Ernest E Maddock is an insider
| Company | Role | Shares held | Bought | Sold | Avg buy | Price now | Last filing |
|---|---|---|---|---|---|---|---|
| Directorsince November 2022 | 10,269 | $94.1K | $94.07 | $249.55+165% | Sep 28, 2026 | ||
| Directorsince August 2021 | 5,265 | $83.97 | Sep 25, 2026 | ||||
| Directorsince February 2023 | 88,902 | $141K | $6.43 | $33.48+421% | Jun 22, 2026 | ||
| Director | 47,816 | $243K | $24.29 | $46.35+91% | May 28, 2026 | ||
| Directorsince January 2022 | 0 | $49.9K | $2.50 | Feb 13, 2023 |
Shares held: common shares owned directly after the latest filing that states it. Avg buy: open-market purchase dollars divided by shares bought, every filing on record. Price now: the latest daily close, against the average buy price.
Every filing
- Sep 25, 2026TERDirector Maddock Ernest E acquired 2 shares, increasing direct ownership by 0.02% to 10,269 unitsForm 4Other acquisition or disposition
- Sep 23, 2026AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Jun 17, 2026AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Jun 17, 2026OUSTDirector Maddock Ernest E was granted 4,725 shares, increasing direct ownership by 6% to 88,902 unitsForm 4Grant or award
- Jun 12, 2026TERDirector Maddock Ernest E acquired 2 shares, increasing direct ownership by 0.02% to 10,267 unitsForm 4Other acquisition or disposition
- May 22, 2026UCTTDirector Maddock Ernest E was granted 2,575 shares, increasing direct ownership by 6% to 47,816 unitsForm 4Grant or award
- May 8, 2026TERDirector Maddock Ernest E was granted 668 shares, increasing direct ownership by 7% to 10,265 unitsForm 4Grant or award
- Mar 18, 2026AVTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Mar 13, 2026TERDirector Maddock Ernest E acquired 2 shares, increasing direct ownership by 0.02% to 9,597 unitsForm 4Other acquisition or disposition
- Jan 2, 2026AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Dec 17, 2025TERDirector Maddock Ernest E acquired 2 shares, increasing direct ownership by 0.02% to 9,595 unitsForm 4Other acquisition or disposition
- Dec 17, 2025AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Sep 29, 2025TERDirector Maddock Ernest E acquired 3 shares, increasing direct ownership by 0.03% to 9,593 unitsForm 4Other acquisition or disposition
- Sep 26, 2025AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Jun 18, 2025AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Jun 18, 2025OUSTDirector Maddock Ernest E was granted 15,058 shares, increasing direct ownership by 22% to 84,177 unitsForm 4Grant or award
- Jun 13, 2025TERDirector Maddock Ernest E acquired 6 shares, increasing direct ownership by 0.06% to 9,590 unitsForm 4Other acquisition or disposition
- May 21, 2025UCTTDirector Maddock Ernest E was granted 8,198 shares, increasing direct ownership by 22% to 45,241 unitsForm 4Grant or award
- May 9, 2025TERDirector Maddock Ernest E was granted 2,971 shares, increasing direct ownership by 45% to 9,584 unitsForm 4Grant or award
- Mar 19, 2025AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Mar 14, 2025TERDirector Maddock Ernest E acquired 3 shares, increasing direct ownership by 0.05% to 6,613 unitsForm 4Other acquisition or disposition
- Mar 7, 2025+$243KUCTTDirector Maddock Ernest E bought $242,900 worth of shares (10,000 units at $24.29)Form 4/AOpen-market purchase
- Jan 2, 2025AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Dec 18, 2024TERDirector Maddock Ernest E acquired 2 shares, increasing direct ownership by 0.03% to 6,610 unitsForm 4Other acquisition or disposition
- Dec 18, 2024AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Sep 27, 2024TERDirector Maddock Ernest E acquired 2 shares, increasing direct ownership by 0.03% to 6,608 unitsForm 4Other acquisition or disposition
- Sep 25, 2024AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Aug 16, 2024+$62.3KOUSTDirector Maddock Ernest E bought $62,320 worth of shares (8,000 units at $7.79), increasing direct ownership by 13% to 69,119 unitsForm 4/AOpen-market purchase
- Jun 21, 2024OUSTDirector Maddock Ernest E was granted 15,195 shares, increasing direct ownership by 33% to 61,119 unitsForm 4Grant or award
- Jun 18, 2024AVTSEC Form 4 filed by Director Maddock Ernest EForm 4Grant or award
- Jun 14, 2024TERDirector Maddock Ernest E acquired 2 shares, increasing direct ownership by 0.03% to 6,606 unitsForm 4Other acquisition or disposition
- May 22, 2024UCTTMaddock Ernest E was granted 3,647 shares, increasing direct ownership by 11% to 38,043 unitsForm 4Grant or award
- May 9, 2024TERMaddock Ernest E was granted 1,876 shares, increasing direct ownership by 40% to 6,604 unitsForm 4Grant or award
- Mar 20, 2024AVTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Feb 1, 2024+$94.1KTERMaddock Ernest E bought $94,070 worth of shares (1,000 units at $94.07), increasing direct ownership by 27% to 4,728 unitsForm 4/AOpen-market purchase
- Jan 2, 2024AVTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Dec 20, 2023AVTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Nov 15, 2023+$37KOUSTMaddock Ernest E bought $37,012 worth of shares (7,000 units at $5.29), increasing direct ownership by 18% to 45,924 unitsForm 4/AOpen-market purchase
- Sep 27, 2023AVTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Aug 21, 2023+$42.1KOUSTSEC Form 4: Maddock Ernest E bought $42,140 worth of shares (7,000 units at $6.02), increasing direct ownership by 22% to 38,924 unitsForm 4Open-market purchase
- Jun 21, 2023AVTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- May 17, 2023UCTTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- May 12, 2023TERSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Mar 15, 2023AVTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Feb 10, 2023OUSTSEC Form 4: Maddock Ernest E was granted 319,261 sharesForm 4Grant or award
- Feb 10, 2023OUSTErnest E Maddock became an insiderForm 3New insider
- Feb 10, 2023VLDRSEC Form 4: Maddock Ernest E converted options into 20,732 shares and returned 162,126 shares to the company, closing all direct ownership in the companyForm 4Sale back to the companyExercise or conversion of a derivative
- Jan 23, 2023VLDRSEC Form 4: Maddock Ernest E converted options into 10,366 sharesForm 4Exercise or conversion of a derivative
- Jan 3, 2023AVTSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Nov 14, 2022TERSEC Form 4: Maddock Ernest E was granted 1,198 sharesForm 4Grant or award
- Nov 14, 2022TERErnest E Maddock became an insiderForm 3New insider
- Jun 16, 2022VLDRSEC Form 4: Maddock Ernest E was granted 111,028 shares, increasing direct ownership by 555% to 131,028 unitsForm 4Grant or award
- May 19, 2022UCTTSEC Form 4: Maddock Ernest E was granted 3,701 shares, increasing direct ownership by 15% to 29,100 unitsForm 4Grant or award
- Mar 7, 2022+$49.9KVLDRSEC Form 4: Maddock Ernest E bought $49,900 worth of shares (20,000 units at $2.50)Form 4Open-market purchase
- Jan 13, 2022VLDRErnest E Maddock became an insiderForm 3New insider
- Jan 13, 2022VLDRSEC Form 4 filed by Maddock Ernest EForm 4Grant or award
- Jan 3, 2022AVTSEC Form 4: Maddock Ernest E was granted 3,856 shares, increasing direct ownership by 274% to 5,265 unitsForm 4Grant or award
- Aug 25, 2021AVTSEC Form 4: Maddock Ernest E was granted 1,409 units of Common StockForm 4Grant or award
- Aug 25, 2021AVTSEC Form 3: New insider Maddock Ernest E claimed no ownership of Common StockForm 3New insider
- May 20, 2021UCTTSEC Form 4: MADDOCK ERNEST E was granted 2,699 units of Common Stock, increasing direct ownership by 12% to 25,399 unitsForm 4Grant or award
Also sits on boards with
Officers and directors who share two or more companies with Ernest E Maddock.
- Ted L Tewksbury III2 shared: OUST, VLDR
- Virginia Boulet2 shared: OUST, VLDR
- Mark Weinswig2 shared: OUST, VLDR
- Kristin Slanina2 shared: OUST, VLDR
Compare Ernest E Maddock with
- Ernest E Maddock vs Ted L Tewksbury III2 shared
- Ernest E Maddock vs Virginia Boulet2 shared
- Ernest E Maddock vs Mark Weinswig2 shared
- Ernest E Maddock vs Kristin Slanina2 shared
- Ernest E Maddock vs Susan Heystee1 shared
- Ernest E Maddock vs Stephen A Skaggs1 shared
Other insiders at the same companies
- Susan HeysteeOUST
- Stephen A SkaggsOUST
- Michelle L. TurnerTER
- Alexander M DavernUCTT
- Mercedes JohnsonTER
- Jinsong XiaoUCTT
- Peter HerweckTER
- Paul J TufanoTER
- Andrew Chisholm HenryTER
- Oleg KhaykinAVT
- Virginia HenkelsAVT
- Philip R GallagherAVT
- Marilyn MatzTER
- Megan ChungOUST
- Darien SpencerOUST
- Charles Angus PacalaOUST
Questions about Ernest E Maddock
- What is Ernest E Maddock's role at Teradyne, Inc?
- Ernest E Maddock reports to the SEC as director at Teradyne, Inc (TER), according to the latest filing on September 28, 2026. Ernest E Maddock has also filed as director at Avnet Inc (AVT), director at Ouster, Inc. (OUST), director at Ultra Clean Holdings, Inc. (UCTT) and director at Velodyne Lidar, Inc. (VLDR).
- How many shares does Ernest E Maddock own?
- After the latest filing that states it, Ernest E Maddock directly owned 10,269 shares of Teradyne, Inc (TER), 5,265 shares of Avnet Inc (AVT), 88,902 shares of Ouster, Inc. (OUST) and 47,816 shares of Ultra Clean Holdings, Inc. (UCTT). Shares held through trusts, funds or family members are reported separately and are not counted here.
- Has Ernest E Maddock bought or sold stock recently?
- The most recent open-market purchase was on March 7, 2025: bought 10,000 shares of Ultra Clean Holdings, Inc. (UCTT) for $243K at an average of $24.29.
- How do I get alerts when Ernest E Maddock files?
- Follow Ernest E Maddock on Quantisnow and you get an email, and a phone notification on Plus, within minutes of each new Form 4 or Form 5, and of each Form 144 notice of a planned sale. Ernest E Maddock filed 2 times in the last 90 days.
From SEC Forms 3, 4, 5 and 144 filed by Ernest E Maddock (SEC CIK 0001227050). Totals count each trade once, skipping amendments whose original is on file, from May 24, 2021 on. View on SEC EDGAR