TER Teradyne
Information Technology, filed as Teradyne Inc (COMMON STOCK), Equity As of 2026 Q2 among managers we track Quote on Google Finance, opens in a new tab
Bought by 1 manager in 2026 Q2, sold by 2
In 2026 Q2 Lee Ainslie opened a position in Teradyne, while Stephen Mandel and Cathie Wood trimmed.
Who owns this now
Largest portfolio weights among holders, up to 4.4% (Stephen Mandel, Lone Pine Capital). Not free-float ownership.
Who owns TER
Sorted by value, long equity only, as of 2026 Q2.
| History | |||||
|---|---|---|---|---|---|
| Stephen Mandel, Lone Pine Capital | Reduce −20.3% | 1,493,080 | $722M | History | |
| Cathie Wood, Ark Investment Management | Reduce −48.2% | 644,782 | $312M | History | |
| Lee Ainslie, Maverick Capital | New 0.01% | 2,101 | $1M | History |
Insider trades
Open-market buys and sales by TER's executives, directors and 10% owners in the last 12 months, from their Form 4s
- None no insider bought on the open market
- None no sales outside a trading plan
- $16M sold by 6 insiders under 10b5-1 plans
-
Marilyn Matz DirectorPlanned sale$140K 400 shares at $350.00 3.1% of stakeTraded Oct 21 Filed Oct 22
-
Gregory Stephen Smith CEOPlanned sale$1.4M 4,000 shares at $341.28 3.7% of stakeTraded Oct 15 Filed Oct 19
-
Marilyn Matz DirectorPlanned sale$273K 800 shares at $341.28 5.8% of stakeTraded Oct 15 Filed Oct 19
-
Mercedes Johnson DirectorPlanned sale$67K 167 shares at $402.90 2.6% of stakeTraded Oct 1 Filed Oct 2
-
Marilyn Matz DirectorPlanned sale$140K 400 shares at $351.11 2.8% of stakeTraded Sep 17 Filed Sep 18
-
Gregory Stephen Smith CEOPlanned sale$1.4M 4,000 shares at $337.83 3.6% of stakeTraded Sep 15 Filed Sep 16
-
Marilyn Matz DirectorPlanned sale$270K 800 shares at $337.83 5.3% of stakeTraded Sep 15 Filed Sep 16
-
Mercedes Johnson DirectorPlanned sale$57K 167 shares at $341.30 2.6% of stakeTraded Sep 1 Filed Sep 2
-
Gregory Stephen Smith CEOPlanned sale$1.7M 4,000 shares at $425.00 3.4% of stakeTraded Aug 17 Filed Aug 18
-
Marilyn Matz DirectorPlanned sale$510K 1,200 shares at $425.00 7.4% of stakeTraded Aug 17 Filed Aug 18
-
Mercedes Johnson DirectorPlanned sale$59K 166 shares at $358.15 2.5% of stakeTraded Aug 3 Filed Aug 4
-
Gregory Stephen Smith CEOPlanned sale$1.4M 4,000 shares at $356.31 3.3% of stakeTraded Jul 15 Filed Jul 16
-
Marilyn Matz DirectorPlanned sale$428K 1,200 shares at $356.31 6.9% of stakeTraded Jul 15 Filed Jul 16
-
Mercedes Johnson DirectorPlanned sale$77K 167 shares at $460.00 2.4% of stakeTraded Jul 1 Filed Jul 2
-
Marilyn Matz DirectorPlanned sale$508K 1,200 shares at $423.03 6.4% of stakeTraded Jun 15 Filed Jun 16
Also filed in the last 12 months, not counted as buying or selling: 26 stock grants, 16 share withholdings for taxes, 12 other transactions, 3 option exercises, and 1 sale to cover taxes.
Congress
4 members of Congress traded TER in the last three years: 4 buys and 5 sales.
- Alan Armstrong Buy $1K–$15K Mar 27 filed Jul 21
-
Lisa C. McClain
Sell
$1K–$15K
Oct 31, 2025
filed Nov 21, 2025
-
Lisa C. McClain
Buy
$1K–$15K
Oct 30, 2025
filed Nov 21, 2025
-
Lisa C. McClain
Sell
$1K–$15K
Oct 30, 2025
filed Nov 21, 2025
-
Lisa C. McClain
Buy
$1K–$15K
Jun 17, 2025
filed Aug 13, 2025
-
Julie Johnson
Sell
$1K–$15K
Apr 1, 2025
filed May 14, 2025
SEC filings
Recent issuer filings from EDGAR, 6 shown.
Financials
US-GAAP annual figures by fiscal year, as tagged in Form 10-K. Each value links to its SEC filing.
Income statement
Balance sheet
Ownership over time
13Fs that reported it each quarter. Click a bar for that quarter’s holders.