Crispin CEO Jeff Hicks confirmed the split in a statement, citing a mutual decision to go different ways: "We will forever be in awe of the company that is Nike and wish them nothing but the best."
A Wieden spokeswoman could not be immediately reached. A report of the split first surfaced on George Parker's blog Adscam/The Horror.
Nike first stunned the ad world last April by adding Crispin to an agency roster long exclusively dominated by Wieden. The pairing of one of the most iconic brands of all time with the hotshop was seen by many as a harbinger of trouble for Wieden, but the collaboration thus far resulted in a single TV ad, for the iPod-integrated Nike-Plus brand, which ran in December.
The move also comes as Nike has been testing the waters with other agency partners beyond its primary relationship with Wieden, even though the agency had still been handling the bulk of the business. Earlier this year Nike tapped 72 and Sunny, El Segundo, Calif., for work related to its European soccer account.
Nike spent a total of $184 million in U.S. measured media across its brands in 2007, according to TNS Media Intelligence.