Donald R. Caldwell, Director at Rubicon Technology, Inc. (RBCN), sold 221,784 shares at $8.00 ($1.8M) on 2017-11-16, disclosed to the SEC on 2017-11-20.
Open-market sale of $1.8M RBCN by Director. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.
| Filing → |
| KWR | SELL | 2018-08-10 | $102K | — | Filing → |
| KWR | SELL | 2018-05-18 | $383K | — | Filing → |
| KWR | SELL | 2017-11-28 | $48K | — | Filing → |