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sellWeak cluster of 210b5-1 plan

Mike Slessor sold $132k of FORM

CEO at FORMFACTOR INC. 4,000 shares at an average of $33.05, traded Mar 3, 2025, filed Mar 4, 2025.

Warning score
24
Value
$132k
4,000 shares
Holdings after
518,650
-1% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    CEO
    +25
  • Trade size
    $132k at market
    +11
  • Share of holdings sold
    Sold 0.8% of holdings
    0
  • Cluster
    2 insiders selling within 14 days
    +8
  • 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.

FORMOct 9, 2026 · close 139.67
Since filing Mar 4, 2025: +342.6%SPY +37.6% · excess +304.9%

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 0001039399-25-000025, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 3, 2025SOpen-market sale
Common Stock10b5-1
-4,000$33.05$132k518,650Mar 4, 2025

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
38Weak
FORMsell 210b5-1
FORMFACTOR INC
Mike Slessor
CEO
$1.8M
17,510 shares
-4%
35Weak
FORMsell 2
FORMFACTOR INC
Kelley Steven-Waiss
director
$202k
2,100 shares
-8%
38Weak
FORMsell 210b5-1
FORMFACTOR INC
Mike Slessor
CEO
$973k
10,227 shares
-2%
36Weak
FORMsell 310b5-1
FORMFACTOR INC
Aric Brendan McKinnis
CFO, SVP Global Finance
$313k
3,462 shares
-24%
48Moderate
FORMsell 7
FORMFACTOR INC
Brian C White
director
$230k
2,300 shares
-18%
42Moderate
FORMsell 810b5-1
FORMFACTOR INC
Mike Slessor
CEO
$816k
8,664 shares
-2%
54Moderate
FORMsell 8
FORMFACTOR INC
Kevin J Brewer
director
$289k
3,000 shares
-27%
42Moderate
FORMsell 8
FORMFACTOR INC
Kelley Steven-Waiss
director
$206k
2,200 shares
-7%
61Notable
FORMsell 8
FORMFACTOR INC
Sheri Rhodes
director
$707k
7,634 shares
-42%
56Moderate
FORMsell 8
FORMFACTOR INC
Thomas St Dennis
director
$697k
7,431 shares
-19%

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.

Mike Slessor sold $132k of FORM | InsiderTell