Aehr CFO Chris Siu Reports Recent Stock Acquisitions and Tax Withholdings

The 194-share withholding was recorded at $101.60 per share; the filing said the shares were withheld for tax obligations upon vesting of restricted stock units and that the transaction did not represent a sale by Siu.
Siu’s 1,089-share acquisition was recorded at $6.6725 per share under Aehr’s Amended and Restated 2006 Employee Stock Purchase Plan, which the filing describes as a tax-conditioned plan under Internal Revenue Code Section 423.
The Form 4 was filed by a single reporting individual and was not an amendment to a prior filing; it also reported no derivative-securities transactions.
Aehr Test Systems CFO Chris Siu acquired a combined 1,283 shares on October 1, 2026, through two separate transactions. The acquisitions included 1,089 shares purchased at $6.6725 per share under the company's employee stock purchase plan, plus 194 shares withheld at $101.60 per share to cover taxes when his restricted stock units vested stocktitan.
After these transactions, Siu directly owned 77,134 shares of Aehr Test Systems stock and indirectly owned an additional 6,795 shares through a trust stocktitan. The withholding of shares for tax obligations is a routine event when restricted stock units vest and does not count as a sale by the executive.
Siu's main acquisition came through Aehr's Amended and Restated 2006 Employee Stock Purchase Plan, a tax-conditioned plan under Internal Revenue Code Section 423 stocktitan. He purchased 1,089 shares at $6.6725 per share, a discounted price available only to participating employees. This plan lets workers buy company stock at favorable rates as part of their compensation package.
The 194-share withholding at $101.60 per share occurred when Siu's restricted stock units vested stocktitan. Companies withhold shares automatically to cover the tax bill that comes due when restricted awards become unrestricted. The filing clarified that this withholding does not count as a sale, distinguishing it from voluntary stock dispositions by insiders.
Insider acquisitions at Aehr follow a broader pattern in the tech sector during early October 2026. VP Alistair N. Sporck added 1,221 shares through the same employee stock purchase plan on October 1 stocktitan. Meanwhile, other company executives also used plan purchases to boost their holdings, signaling confidence in their employer's future prospects.
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