X0609 4 2026-06-30 1 0001320414 SELECT MEDICAL HOLDINGS CORP SEM 0000918697 ORTENZIO ROBERT A false C/O SELECT MEDICAL HOLDINGS CORPORATION 4714 GETTYSBURG RD MECHANICSBURG PA 17055 true true true false EXECUTIVE CHAIRMAN 0 Common Stock 2026-06-30 4 J 0 7081788 0 D 0 D Common Stock 2026-06-30 4 J 0 1000000 0 D 279000 I By the Robert A. Ortenzio Descendants Trust Common Stock 2026-06-30 4 D 0 279000 16.50 D 0 I By the Robert A. Ortenzio Descendants Trust Common Stock 2026-06-30 4 J 0 280415 0 D 0 I By the Robert A. Ortenzio 2014 Trust for Bryan A. Ortenzio Common Stock 2026-06-30 4 J 0 280415 0 D 0 I By the Robert A. Ortenzio 2014 Trust for Kevin M. Ortenzio Common Stock 2026-06-30 4 J 0 280415 0 D 0 I By the Robert A. Ortenzio 2014 Trust for Madeline G. Ortenzio This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026). Immediately prior to the effective time of the merger, the Reporting Person contributed 6,674,010 common shares and 407,778 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP. Immediately prior to the effective time of the merger, The Robert A. Ortenzio Descendants Trust contributed 1,000,000 common shares ("Rollover Shares") to Parent in exchange for an equivalent amount of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP. The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein. At the effective time of the merger, each of the shares of common stock reported in this row of this Form 4 issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest. Immediately prior to the effective time of the merger, The Robert A. Ortenzio 2014 Trust for Bryan A. Ortenzio contributed 280,415 common shares to Parent in exchange for an equivalent amount of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP. Immediately prior to the effective time of the merger, The Robert A. Ortenzio 2014 Trust for Kevin M. Ortenzio contributed 280,415 common shares to Parent in exchange for an equivalent amount of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP. Immediately prior to the effective time of the merger, The Robert A. Ortenzio 2014 Trust for Madeline G. Ortenzio contributed 280,415 common shares to Parent in exchange for an equivalent amount of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP. /s/ John F. Duggan, Attorney-in-Fact 2026-07-01