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sellModerate cluster of 2

Michael B Gustafson sold $178k of PDFS

director at PDF SOLUTIONS INC. 5,750 shares at an average of $30.92, traded Dec 12, 2023, filed Dec 14, 2023.

Warning score
45
Value
$178k
5,750 shares
Holdings after
14,192
-29% from before
From 52-week low
+17%
low $26.40, close $30.93
From 52-week high
-35%
high $47.60, as of Dec 12, 2023

Score components

  • Role
    Director
    +15
  • Trade size
    $178k at market
    +12
  • Share of holdings sold
    Sold 29% of holdings
    +10
  • Cluster
    2 insiders selling within 14 days
    +8

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.

PDFSOct 12, 2026 · close 52.69
Since filing Dec 14, 2023: +67.9%SPY +70.9% · excess -3.0%

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 0001415889-23-016447, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Dec 12, 2023SOpen-market sale
Common Stock
-867$31.29$27k19,075Dec 14, 2023
Dec 13, 2023SOpen-market sale
Common Stock
-4,883$30.86$151k14,192Dec 14, 2023

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
26Weak
PDFSsell
PDF SOLUTIONS INC
Andrzej Strojwas
Chief Technology Officer
$151k
3,394 shares
-4%
23Weak
PDFSsell
PDF SOLUTIONS INC
Shuo Zhang
director
$77k
1,501 shares
-6%
45Moderate
PDFSbuy
PDF SOLUTIONS INC
Michael B Gustafson
director
$146k
7,500 shares
+33%
38Weak
PDFSbuy 2
PDF SOLUTIONS INC
Michael B Gustafson
director
$92k
4,000 shares
+22%
58Moderate
PDFSbuy 2
PDF SOLUTIONS INC
John Kachig Kibarian
PRESIDENT AND CEO
$1.1M
50,000 shares
+2%
35Weak
PDFSsell 2
PDF SOLUTIONS INC
Andrzej Strojwas
CTO
$190k
6,253 shares
-7%
34Weak
PDFSsell 2
PDF SOLUTIONS INC
Andrzej Strojwas
CTO
$155k
5,030 shares
-5%
35Weak
PDFSsell 2
PDF SOLUTIONS INC
Nancy Erba
director
$62k
2,000 shares
-13%
37Weak
PDFSsell
PDF SOLUTIONS INC
Shuo Zhang
director
$191k
5,500 shares
-35%
56Moderate
PDFSsell
PDF SOLUTIONS INC
Adnan Raza
EVP, FINANCE AND CFO
$932k
27,494 shares
-36%

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.

Michael B Gustafson sold $178k of PDFS | InsiderTell