X0304 4 2012-02-25 0 0000070318 TENET HEALTHCARE CORP THC 0001217839 PORTER BIGGS C 1445 ROSS AVENUE SUITE 1400 DALLAS TX 75202 0 1 0 0 Chief Financial Officer Common Stock 2012-02-25 4 A 0 32552 0.00 A 454471 D Common Stock 2012-02-25 4 F 0 10227 5.78 D 444244 D Common Stock 2012-02-25 4 A 0 32552 0.00 A 476796 D Common Stock 2012-02-25 4 F 0 10227 5.78 D 466569 D Common Stock 25000 I By Trust 2010 February Performance-Based Restricted Units 2012-02-25 4 A 0 32552 0.00 A Common Stock 32552 32552 D 2010 February Restricted Units 2012-02-25 4 D 0 32552 0.00 D Common Stock 32552 32552 D (BP1) As previously reported, on February 25, 2010, the reporting person received a grant of 97,656 performance restricted units that were subject to the issuer's attainment of a specified one-year performance metric for the year then-ending December 31, 2010. The performance metric was met; therefore, these restricted units vest ratably on each of the first, second and third anniversaries of the date of grant. The first anniversary of this grant occurred on February 25, 2011, resulting in the vesting and settlement of 32,552 shares of common stock. The second anniversary of this grant occurred on February 25, 2012, resulting in the vesting and settlement of 32,552 shares of common stock, as shown in Table I. The remaining 32,552 performance restricted units, which are scheduled to vest on February 25, 2013, are shown in Table II. Restricted units are settled in shares of the issuer's common stock upon vesting. Shares withheld for payment of taxes upon vesting of restricted units in accordance with Rule 16b-3. (BP3) As previously reported, on February 25, 2010, the reporting person received a grant of 97,656 restricted units that vest ratably on each of the first, second and third anniversaries of the date of grant. The first anniversary of this grant occurred on February 25, 2011, resulting in the vesting and settlement of 32,552 shares of common stock. The second anniversary of this grant occurred on February 25, 2012, resulting in the vesting and settlement of 32,552 shares of common stock as shown in Table I and Table II. The remaining 32,552 restricted units, as shown in Table II, are scheduled to vest on February 25, 2013. Restricted units are settled in shares of the issuer's common stock upon vesting. /s/ Paul A. Castanon, Attorney-in-Fact for Biggs C. Porter 2012-02-28