M:Metrics (www.mmetrics.com), the recognized leader in mobile measurement, has been sold to comScore (Nasdaq: SCOR) (www.comscore.com) a leader in measuring the digital world. The acquisition makes comScore the immediate leader in measuring the emerging and strategically important mobile Internet market and adds to comScore’s leading position in measuring PC-based Internet usage.

The transaction involves a cash payment of $44.3 million and the issuance of approximately 50,000 options to purchase shares of comScore stock to certain M:Metrics unvested option holders.