Check out the companies making headlines after the bell Wednesday:
Alcoa - The metals maker's shares rose as much as 1 percent after it missed earnings forecasts but beat on revenue. The company reported adjusted second-quarter earnings of 19 cents per share on $5.90 billion in revenue, versus forecast of 22 cents a share on $5.81 billion.
WD-40 - The stock fell more than 4 percent after the maintenance products supplier reported a 3 percent annual decline in third-quarter revenue. However, adjusted earnings increased to 75 cents a share from 69 cents a share a year ago. The company also cut its full-year guidance, citing the negative effect of a stronger dollar and challenges in Eastern Europe.
Cedar Fair - KBCM Research maintained its "overweight" rating on the stock, citing the amusement parks operator's preliminary results. Earlier, Cedar said revenue through the July 4th weekend rose 5 percent to $491 million. Still, shares fell about 2 percent in light volume after closing up about 2.
PepsiCo - Shares rose modestly after the beverage giant announced a management reshuffle. The company said Chief Financial Officer Hugh Johnston will be named to the added role of vice chairman. In addition, Executive Vice President of Global Operations Enderson Guimaraes will leave the firm and his duties will be split between two executives.