In an interview with Yahoo Finance, the chip-maker's chief executive officer Lisa Su said that the company's chips were not susceptible to the Meltdown flaw, which affects Intel chips, but they do have the Spectre security flaw.
The company's shares fell 3.5% in after-hours trading. Intel Corporation's (NASDAQ:INTC) stock edged up 0.3%.
Elsewhere in the technology sector communication equipment maker Finisar Corporation (NASDAQ:FNSR) was wanted after it named former Broadcom executive Michael Hurlston as its new chief executive officer.
Hurlston will replace co-founder Jerry Rawls, who announced his retirement.
In other technology board room news, investors in International Business Machines Corp (NYSE:IBM) shrugged off news that chief financial officer Martin Schroeter is to quit the role and become senior vice president of global markets.
The stock was modestly higher in screen-based trading.
The molecular diagnostics company priced its underwritten public offering of 1.0% convertible senior notes due 2025; the initial conversion rate will be 13.2569 shares of common stock per US$1,000 of notes, which is equivalent to an initial conversion price of around US$75.43 per share.
The shares were down US$3.16 at US$51.90 in electronic trading.