X0306 4 2014-08-11 0 0001320414 SELECT MEDICAL HOLDINGS CORP SEM 0001557543 NORTH TIDE CAPITAL, LLC 500 BOYLSTON STREET SUITE 310 BOSTON MA 02116 0 0 1 0 0001594882 North Tide Capital Master, LP 500 BOYLSTON STREET SUITE 310 BOSTON MA 02116 0 0 1 0 0001594068 Laughlin Conan 500 BOYLSTON STREET SUITE 310 BOSTON MA 02116 0 0 1 0 Common Stock 2014-08-11 4 S 0 100000 14.00 D 13850000 I See Footnote Common Stock 2014-08-11 4 P 0 100000 14.00 A 13950000 I See Footnote Shares reported herein represent 12,750,000 shares held by North Tide Capital Master, LP and 1,200,000 shares held by a managed account client for which North Tide Capital, LLC ("North Tide") serves as investment manager. Mr. Laughlin serves as manager of North Tide. Each of the Reporting Persons disclaims beneficial ownership of the shares reported herein except to the extent of its or his pecuniary interest therein, and the filing of this Form 4 shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any such shares for purposes of Section 16(a) of the Securities Exchange Act of 1934 or for any other purpose. The reported transactions reflect a purchase of shares by North Tide Capital Master, LP and a sale of the same number of shares by the managed account client. /s/ NORTH TIDE CAPITAL, LLC, by Conan Laughlin, Manager 2014-08-13 /s/ NORTH TIDE CAPITAL MASTER, LP, by North Tide Capital GP, LLC, Conan Laughlin, Manager 2014-08-13 /s/ CONAN LAUGHLIN 2014-08-13