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sellWeak cluster of 210b5-1 plan

Mike Slessor sold $119k of FORM

CEO at FORMFACTOR INC. 4,000 shares at an average of $29.83, traded Jun 2, 2025, filed Jun 3, 2025.

Warning score
23
Value
$119k
4,000 shares
Holdings after
510,895
-1% from before
From 52-week low
+30%
low $23.18, close $30.02
From 52-week high
-38%
high $48.72, as of Jun 2, 2025

Score components

  • Role
    CEO
    +25
  • Trade size
    $119k at market
    +10
  • 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.

This signal so far: 1m +15.4%, 3m -9.3%, 6m +78.7%.

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 Jun 3, 2025: +345.4%SPY +32.8% · excess +312.6%

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 0001039399-25-000069, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Jun 2, 2025SOpen-market sale
Common Stock10b5-1
-4,000$29.83$119k510,895Jun 3, 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%
46Moderate
FORMsell 3
FORMFACTOR INC
Thomas St Dennis
director
$424k
2,800 shares
-9%
45Moderate
FORMsell 310b5-1
FORMFACTOR INC
Mike Slessor
CEO
$1.4M
11,890 shares
-3%
72Notable
FORMsell 5
FORMFACTOR INC
Sheri Rhodes
director
$794k
6,328 shares
-54%
58Moderate
FORMsell 7
FORMFACTOR INC
Rebeca Obregon-Jimenez
director
$484k
3,828 shares
-33%
40Moderate
FORMsell 7
FORMFACTOR INC
Thomas St Dennis
director
$116k
1,000 shares
-3%
56Moderate
FORMsell 7
FORMFACTOR INC
Brian C White
director
$410k
3,250 shares
-27%
55Moderate
FORMsell 6
FORMFACTOR INC
Kelley Steven-Waiss
director
$678k
5,400 shares
-18%
53Moderate
FORMsell 6
FORMFACTOR INC
Jorge Titinger
director
$516k
4,009 shares
-23%

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 $119k of FORM | InsiderTell