X0306 4/A 2015-03-09 2015-03-11 0 0001320414 SELECT MEDICAL HOLDINGS CORP SEM 0001557543 NORTH TIDE CAPITAL, LLC 500 BOYLSTON STREET SUITE 1860 BOSTON MA 02116 0 0 1 0 Common Stock 2015-03-09 4 S 0 58630 13.375 D 13891370 I See Footnotes Common Stock 2015-03-09 4 S 0 277670 13.375 D 13613700 I See Footnotes This amendment to the Form 4 previously filed on March 11, 2015 is being filed to correct the date of the earliest transaction required to be reported from "March 11, 2015" to "March 9, 2015" and to correct the number of securities disposed of on such date at a price of $13.375 per share. Shares reported herein represent: as of the close of business on March 9, 2015, (i) 12,344,790 shares held by North Tide Capital Master, LP (the Master Fund") and (ii) 1,238,310 shares held by held by a managed account (the "Account"); and as of the close of business on March 10, 2015, (i) 12,225,000 shares held by the Master Fund and (ii) 1,225,000 shares held by the Account. North Tide Capital, LLC ("North Tide") serves as investment manager for the Master Fund and the Account. 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. Transaction effected by the Master Fund. Transaction effected by the Account. NOTE: This amendment to the Form 4 previously filed on March 11, 2015 is being filed to correct the date of the earliest transaction required to be reported from "March 11, 2015" to "March 9, 2015" and to correct the number of securities disposed of on such date at a price of $13.375 per share. /s/ NORTH TIDE CAPITAL, LLC, by Conan Laughlin, Manager 2015-03-12 /s/ NORTH TIDE CAPITAL MASTER, LP, by North Tide Capital GP, LLC, Conan Laughlin, Manager 2015-03-12 /s/ CONAN LAUGHLIN 2015-03-12