Check out which companies are making headlines after the bell Tuesday:
Wells Fargo - The bank said its website was experiencing an unusually high volume of traffic that it believes stems from a denial-of-service cyber attack. While the vast majority of customers are not impacted and client information remains safe, the company's spokeswoman advised users who have trouble logging in to try again as the disruption is usually intermittent. Shares edged lower in extended-hours trading.
(Read More: Dow Logs Fresh High,S&P Finishes Within 2 Points of Closing Peak)
SAIC - The defense company posted earnings of 54 cents a share, topping expectations by 3 cents a share, while revenue was in line with estimates at $2.71 billion, In addition, the company provided full-year revenue guidance that missed, while earnings came in on the lower end of forecasts. But the company announced a special cash dividend of $1 a share. Shares climbed in extended-hours trading.
Mattress Firm - The mattress maker posted earnings of 30 cents a share, excluding one-time items, on revenue of $258 million, missing estimates for earnings of 32 cents a share on sales of $262 million. But the company provided full-year outlook that topped Wall Street expectations, sending shares higher in extended-hours trading.
LogMeIn - The remote access software company announced it prevailed in a patent litigation case against 01 Communique Lab minutes before the closing bell, sending shares up nearly 20 percent. Shares slipped slightly in extended-hours trading after being temporarily halted.
- The semiconductor company appointed Michael Hurlston as its executive vice president of worldwide sales. Hurlston will succeed Thomas Lagatta, who will retire at the end of the year.
Tumi Holdings - The manufacturer of suitcases announced a 10 million share secondary offering for holders through Goldman Sachs, Credit Suisse and JPMorgan.
—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)
Questions? Comments? Email us at marketinsider@cnbc.com