X0303 4 2011-02-15 0001022079 QUEST DIAGNOSTICS INC DGX 0001222671 MOHAPATRA SURYA N C/O QUEST DIAGNOSTICS INCORPORATED 3 GIRALDA FARMS MADISON NJ 07940 1 1 Chairman, President & CEO Common Stock 2011-02-15 4 A 0 67469 0 A 353425 D Common Stock 2011-02-15 4 D 0 31272 56.82 D 322153 D Common Stock 2011-02-16 4 A 0 45457 0 A 367972 D Common Stock 5166 I 401(k)/sdcp Stock Options (Right to Buy) 57.115 2011-02-16 4 A 0 140917 0 A 2021-02-16 Common Stock 140917 140917 D The option vests in three equal annual installments beginning on the first annual anniversary of the grant date. Stock issued by Quest Diagnostics Incorporated in settlement of a performance share award dated March 4, 2008, approved in accordance with the requirements of Rule 16b-3(d). Disposition of common stock to the issuer solely to cover tax withholding obligations arising from the settlement of said performance share award. Represents an award of restricted shares granted on February 16, 2011. The amount includes approximately 362 shares acquired via dividend reinvestment during 2010 pursuant to a dividend reinvestment plan, sponsored by a broker-dealer, that essentially mirrors a dividend reinvestment plan sponsored by the registrant. These underlying shares were acquired on a periodic basis by the trustee of the Company's tax qualified Profit Sharing (401(k)) and/or Supplemental Deferred Compensation Plan. The information was obtained from the plan administrator as of a current date. The number of shares is based on the account balance of the Company stock fund under each Plan (which includes some money market instruments) divided by the market price of the Company stock as of that date. /s/ William J. O'Shaughnessy, Jr., Attorney in Fact for Surya N. Mohapatra 2011-02-17