X0303 4 2011-02-10 0001022079 QUEST DIAGNOSTICS INC DGX 0001222676 HAGEMANN ROBERT C/O QUEST DIAGNOSTICS INCORPORATED 3 GIRALDA FARMS MADISON NJ 07940 1 SVP & Chief Financial Officer Common Stock 2011-02-10 4 F 0 2305 57.28 D 112611 D Common Stock 2011-02-11 4 F 0 2305 57.15 D 110306 D Common Stock 1758 I SDCP Disposition of common stock to the issuer solely to cover tax withholding obligations arising from the vesting of a previous grant of restricted share units. The amount includes exempt purchases made under the Company's stock purchase plan. These underlying shares were acquired on a periodic basis by the trustee of the Company's Supplemental Deferred Compensation Plan. The information was obtained from the plan administrator as of a recent date. The number of shares is based on the account balance of the Company stock fund under the plan (which includes some money market instruments), divided by the market price of the Company's stock as of that date. /s/ William J. O'Shaughnessy, Jr., Attorney in Fact for Robert Hagemann 2011-02-14