Chris Siu

This profile gathers the share dealings of Chris Siu across 2 companies, led by Aehr Test Systems and Ultra Clean Holdings, Inc. Over a trading history stretching from 30 April 2021 to 12 October 2026, the count stands at 46 filings.

Sales make up the whole of the open-market record (1 sale, €7,537). Other entries cover 39 share grants.

The record was last updated on 13 October 2026 with a share grant (€74k) in Aehr Test Systems. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 2 days. US insiders must file a Form 4 within two business days of a trade. Sales are harder to read than purchases, since they often meet personal needs such as tax or diversification. These figures are compiled from regulatory filings published by SEC (Form 4). They describe what insiders did and are not a recommendation.