Chris Siu

Companies

• Aehr Test SystemsChief financial officer Jun 7, 2023 to now¹
• Ultra Clean Holdings, Inc.Chief Accounting Officer & SVP Jun 5, 2019 to Jun 2, 2022²
• Trident MicrosystemsChief Accounting Officer Feb 7, 2007 to Jul 24, 2009³

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Aehr Test Systems AEHR83,034 shares⁴$5.3M at $63.77Sep 1, 2026
• UCUltra Clean Holdings, Inc. UCTT40,106 shares⁵$2.1M at $53.26May 31, 2022

As of each latest filing. The line shows shares held over time.

Recent filings

• Sep 1, 2026Shares withheld for tax 496 shares at $76.59 of Aehr Test Systems⁴
• Jul 13, 2026Shares withheld for tax 988 shares at $72.60 of Aehr Test Systems⁶
• Jul 2, 2026Shares withheld for tax 1,139 shares at $69.96 of Aehr Test Systems⁷
• Jul 1, 2026Shares withheld for tax 2,213 shares at $84.43 of Aehr Test Systems⁷
• Jul 1, 2026Granted 6,079 shares of Aehr Test Systems⁷
• Jul 1, 2026Granted 6,165 shares of Aehr Test Systems⁷
• Jun 1, 2026Shares withheld for tax 350 shares at $93.62 of Aehr Test Systems⁸
• May 14, 2026Sold 1,600 shares at $106.78 of Aehr Test Systems⁹
• May 14, 2026Sold 470 shares at $108.00 of Aehr Test Systems⁹
• Apr 11, 2026Shares withheld for tax 697 shares at $70.43 of Aehr Test Systems¹⁰
• Apr 2, 2026Shares withheld for tax 821 shares at $44.32 of Aehr Test Systems¹¹
• Apr 1, 2026Other 2,095 shares at $6.67 of Aehr Test Systems¹¹
• Mar 1, 2026Shares withheld for tax 368 shares at $37.43 of Aehr Test Systems¹²
• Jan 11, 2026Shares withheld for tax 799 shares at $26.32 of Aehr Test Systems¹³
• Jan 2, 2026Shares withheld for tax 940 shares at $22.16 of Aehr Test Systems¹⁴
• Dec 1, 2025Shares withheld for tax 349 shares at $22.53 of Aehr Test Systems¹⁵
• Oct 13, 2025Shares withheld for tax 695 shares at $23.49 of Aehr Test Systems¹⁶
• Oct 2, 2025Shares withheld for tax 126 shares at $32.25 of Aehr Test Systems¹⁷
• Oct 2, 2025Shares withheld for tax 694 shares at $32.25 of Aehr Test Systems¹⁸
• Oct 1, 2025Other 1,009 shares at $6.67 of Aehr Test Systems¹⁹
• Sep 2, 2025Shares withheld for tax 349 shares at $24.88 of Aehr Test Systems²⁰
• Jul 11, 2025Shares withheld for tax 1,045 shares at $14.11 of Aehr Test Systems²¹
• Jul 2, 2025Shares withheld for tax 752 shares at $15.13 of Aehr Test Systems²²
• Jul 2, 2025Granted 5,586 shares of Aehr Test Systems²²
• Jul 2, 2025Granted 30,998 shares of Aehr Test Systems²²