Quest Diagnostics Announces Completion of Final Extension of the Subsequent Offering Period and Intent to Exercise Top-Up Option and Complete Merger

Quest Diagnostics Incorporated DGX and Spark Acquisition Corporation, its wholly owned subsidiary, announced today the completion of the final extension of the subsequent offering period with respect to Spark's cash tender offer for all outstanding shares of common stock of Celera Corporation CRA. The final extension of the subsequent offering period for the tender offer expired at 5:00 p.m., New York City time, on Tuesday, May 10, 2011. Computershare Trust Company, N.A., the depositary for the tender offer, has indicated that 1,492,309 shares of common stock of Celera had been tendered during the final extension of the subsequent offering period and Spark has accepted for payment all tendered shares. Spark now owns approximately 53,215,043 shares of common stock of Celera, representing approximately 64.02% of Celera's outstanding shares of common stock and 61.01% of Celera's outstanding shares of common stock on a fully diluted basis.