Skip to content
sellWeak cluster of 310b5-1 plan

Marilyn Matz sold $140k of TER

director at TERADYNE, INC. 400 shares at an average of $351.11, traded Sep 17, 2026, filed Sep 18, 2026.

Warning score
21
Value
$140k
400 shares
Holdings after
13,841
-3% from before
From 52-week low
+209%
low $114.10, close $353.13
From 52-week high
-27%
high $483.65, as of Sep 17, 2026

Score components

  • Role
    Director
    +15
  • Trade size
    $140k at market
    +11
  • Share of holdings sold
    Sold 2.8% of holdings
    0
  • Cluster
    3 insiders selling within 14 days
    +15
  • 10b5-1 plan
    Pre-scheduled under a 10b5-1 plan
    -20

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

TEROct 9, 2026 · close 402.68
Since filing Sep 18, 2026: +8.4%SPY +2.2% · excess +6.2%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0000904454-26-000487, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Sep 17, 2026SOpen-market sale
Common Stock10b5-1
-400$351.11$140k13,84124 d ago

Related signals

Other insiders at TERADYNE, INC and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
11Weak
TERsell 210b5-1
TERADYNE, INC
Mercedes Johnson
director
$67k
167 shares
-3%
23Weak
TERsell 310b5-1
TERADYNE, INC
Marilyn Matz
director
$270k
800 shares
-5%
45Moderate
TERsell 310b5-1
TERADYNE, INC
Gregory Stephen Smith
President and CEO
$1.4M
4,000 shares
-4%
17Weak
TERsell 310b5-1
TERADYNE, INC
Mercedes Johnson
director
$57k
167 shares
-3%
3Weak
TERsell10b5-1
TERADYNE, INC
Mercedes Johnson
director
$69k
625 shares
-5%
22Weak
TERsell 310b5-1
TERADYNE, INC
Richard John Burns
President, Semiconductor Test
$50k
445 shares
-2%
10Weak
TERsell 310b5-1
TERADYNE, INC
Ryan Driscoll
VP, General Counsel, Secretary
$24k
216 shares
-3%
18Weak
TERsell 310b5-1
TERADYNE, INC
Mercedes Johnson
director
$70k
625 shares
-4%
16Weak
TERsell 310b5-1
TERADYNE, INC
Ryan Driscoll
VP, General Counsel, Secretary
$45k
437 shares
-9%
27Weak
TERsell 310b5-1
TERADYNE, INC
Richard John Burns
President, Semiconductor Test
$182k
1,477 shares
-7%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Marilyn Matz sold $140k of TER | InsiderTell