Michael B Gustafson bought $146k of PDFS
director at PDF SOLUTIONS INC. 7,500 shares at an average of $19.45, traded May 13, 2025, filed May 14, 2025.
Score components
- +15RoleDirector
- +11Trade size$146k at market
- +6Relative to holdingsHoldings up 33%
- +8Price context42% below the 52-week high
- 0ClusterNo other insider buying within 14 days
- +5Repeat buying2 buys in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
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 -2.6%, 3m +1.0%, 6m +30.6%.
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.
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 0001415889-25-012951, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| May 13, 2025 | POpen-market purchase Common Stock | +7,500 | $19.45 | $146k | 30,074 | May 14, 2025 |
Related signals
Other insiders at PDF SOLUTIONS INC and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 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% | |
| 38Weak | PDF SOLUTIONS INC | Michael B Gustafson director | $92k 4,000 shares | +22% | |
| 58Moderate | PDF SOLUTIONS INC | John Kachig Kibarian PRESIDENT AND CEO | $1.1M 50,000 shares | +2% | |
| 35Weak | PDF SOLUTIONS INC | Andrzej Strojwas CTO | $190k 6,253 shares | -7% | |
| 34Weak | PDF SOLUTIONS INC | Andrzej Strojwas CTO | $155k 5,030 shares | -5% | |
| 35Weak | 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% | |
| 48Moderate | PDF SOLUTIONS INC | Ye Jane Li director | $373k 11,184 shares | -48% |
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.