Rambus ( RMBS) posted a 24% rise in fourth-quarter revenue and said it could face a delisting from Nasdaq because of its ongoing restatement.

The tech licensing company said Wednesday that revenue totaled $51.7 million in the fourth quarter, driven by new patent licensing agreements. Two analysts polled by Thomson Financial had an average estimate for revenue of $50 million.

Rambus didn't report bottom-line fourth-quarter figures because of its internal investigation of past stock option grants. The company is in the midst of restating its results for several years due to the misdating of stock options and has said it plans to take charges of more than $200 million.

The company said it won't complete its restatement by the Feb. 9 deadline set by Nasdaq's listing qualifications panel. The market requires timely filings for companies to remain listed.

Rambus said the panel indicated that it isn't able to grant a further extension. As a result, the company's shares will be subject to delisting Feb. 12 unless a review council stays the decision.

Rambus said it has asked the listing council to stay the move, but there's no assurance the stay will be granted.

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