OVERLAND PARK, Kan. (AP) — Sprint Nextel Corp. is offering 14 percent more than before for the stake in wireless data network operator Clearwire Corp. it does not already own, but a large shareholder said the offer was still inadequate.

Sprint said Tuesday that it is offering $3.40 per share, or $2.5 billion, for the remainder of Clearwire Corp. Its previous offer, from December, was for $2.97 per share.