InsidersTradesSigma
Discover the full record of transactions filed by Gramm Jefferson, Director. Insider active across 1 companies, notably Rubicon Technology, Inc.. In total, 2 filings have been published. The latest transaction was filed on 23 June 2021 — Attribution. Regulator: SEC (Form 4). The full history is accessible without signup.
2 of 2 declarations
Jefferson Gramm is a Board Member at Rubicon Technology, Inc. He plays a key role in the governance of the company, contributing to strategic decision-making.