While Open Road’s wolf adventure pic “The Grey” is looking on track to win the weekend box office, early Friday B.O. estimates for Lionsgate’s “One for the Money” are delivering something of a surprise.

Midweek tracking had put Katherine Heigl starrer “One” in the $5 million-$7 million range through Sunday. But Friday afternoon grosses — boosted in large part by a special from coupon website Groupon — show the pic angling to rake in between $13 million and $15 million over the weekend frame.

“The Grey” is on a pace to take in between $5 million and $6 million on Friday, putting it in line to earn between $15 million and $17 million for the weekend.

That means that Summit’s “Man on a Ledge” will likely take third place among the trio of openers.

Box office observers estimate “Ledge” to earn between $2 million and $2.5 million Friday, positioning the Sam Worthington-toplined action thriller to earn $6 million to $8 million through Sunday. Summit also offered an online deal for “Ledge” through the Living Social site, but tracking as of Friday afternoon doesn’t show the pic earning more than data had indicated earlier this week.

Meanwhile, Screen Gems’ holdover “Underworld: Awakening” is likely to be down by about 60% in its soph sesh, putting the fourth installment in the vampire vs. werewolves franchise in line to earn around $10 million.