John Kachig Kibarian is CEO & President at PDF SOLUTIONS INC (PDFS). They have made 1 open-market trade across 1 company since 2006, most recently 2025-02-25.
CIK 0001164239
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $2.3M since 2025, never a sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| PDFS | 2,522,756 | $98.8M |
Shares reported on the most recent Form 4, priced at the 2025-02-25 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| PDFS | BUY | 2025-02-24 | 2025-02-25 | $22.58 | $2.3M | -6.1% | -14.2% | -19.2% |
| PDFS | SELL · 10b5-1 | 2006-09-20 | 2006-09-22 | $13.00 | $52K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-09-13 | 2006-09-14 | $12.98 | $52K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-09-06 | 2006-09-07 | $12.87 | $50K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-08-30 | 2006-08-31 | $12.98 | $52K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-08-23 | 2006-08-25 | $13.09 | $52K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-08-16 | 2006-08-17 | $12.83 | $51K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-07-19 | 2006-07-21 | $12.00 | $48K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-07-12 | 2006-07-13 | $12.75 | $51K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-07-05 | 2006-07-05 | $12.52 | $50K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-06-07 | 2006-06-09 | $12.52 | $50K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-05-31 | 2006-06-02 | $13.19 | $50K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-05-24 | 2006-05-26 | $13.53 | $54K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-05-17 | 2006-05-19 | $13.99 | $56K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-05-10 | 2006-05-12 | $15.53 | $59K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-05-03 | 2006-05-05 | $15.72 | $57K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-04-26 | 2006-04-28 | $15.23 | $61K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-04-19 | 2006-04-20 | $19.00 | $3K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-04-19 | 2006-04-20 | $18.62 | $68K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-04-12 | 2006-04-14 | $18.33 | $73K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-04-05 | 2006-04-07 | $18.96 | $76K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-03-29 | 2006-03-31 | $18.76 | $75K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-03-22 | 2006-03-24 | $18.13 | $73K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-03-15 | 2006-03-17 | $18.34 | $73K | -15.4% | -2.1% | -2.1% |
| PDFS | SELL · 10b5-1 | 2006-03-08 | 2006-03-10 | $17.83 | $71K | -15.4% | -2.1% | -2.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.