Camtek shares dropped 4.23% to $165.50 today. * Stifel lowered its price target to $170 from $185, maintaining a Hold rating, citing valuation concerns. * Recent insider disclosures revealed substantial executive sales on August 11-12, including approximately $1.13 million by Executive Chairman Lior Aviram and $713,024 by CFO Moshe Eisenberg. * Strong semiconductor-sector performance makes broad sector weakness an unlikely explanation for the decline.