X0202 SCHEDULE 13D/A 0000918697 XXXXXXXX LIVE 3 Common Stock, par value $0.01 per share 08/21/2026 false 0002014596 20603L102 Concentra Group Holdings Parent, Inc.

5080 Spectrum Drive, Suite 1200W Addison TX 75001

Timothy F. Ryan (972) 364-8000 Concentra Group Holdings Parent, Inc. 5080 Spectrum Drive, Suite 1200W Addison TX 75001 Stephen M. Leitzell (215) 994-2621 Dechert LLP 2929 Arch Street Philadelphia PA 19104 0000918697 N Robert A. Ortenzio OO N X1 4763794.00 1984428.00 4763794.00 1984428.00 6748222.00 N 5.3 IN Based on 127,517,736 shares of the Company's common stock outstanding as of July 31, 2026 as disclosed on Issuer's Quarterly Report on Form 10-Q for the quarter ended June 30, 2026 filed on August 6, 2026. Common Stock, par value $0.01 per share Concentra Group Holdings Parent, Inc. 5080 Spectrum Drive, Suite 1200W Addison TX 75001 Item 3 of the Schedule 13D is hereby amended to add the following information: On August 21, 2026, the Reporting Person entered into that certain Stock Repurchase Agreement (the "Repurchase Agreement") with the Company and The Robert A. Ortenzio Descendants Trust, The Robert A. Ortenzio 2014 Trust FBO Bryan A. Ortenzio, The Robert A. Ortenzio 2014 Trust FBO Kevin M. Ortenzio and The Robert A. Ortenzio 2014 Trust FBO Madeline G. Ortenzio (collectively, with the Reporting Person, the "Sellers"). Pursuant to the Repurchase Agreement, the Company agreed to repurchase an aggregate of 1,000,000 shares of the Company's common stock from the Sellers in a privately negotiated transaction at a purchase price of $34.65 per share, for an aggregate purchase price of $34,650,000. The foregoing description of the Repurchase Agreement and the transactions contemplated thereby is qualified in its entirety by reference to the full text of the Repurchase Agreement, a copy of which is filed as Exhibit 99.1 to this Amendment No. 3 and is incorporated herein by reference. Sections (a), (b) and (c) of Item 5 of the Schedule 13D are hereby replaced with the following information: "(a)-(b) The Reporting Person may be deemed to beneficially own an aggregate of 6,748,222 shares of the Company's common stock. This aggregate represents approximately 5.3% of the shares of the Company's common stock outstanding. The Reporting Person may be deemed to have (a) the sole power to vote or direct the vote of, and to dispose of or to direct the disposition of, 4,763,794 shares of the Company's common stock and (b) the shared power to vote or direct the vote of, and to dispose of or to direct the disposition of, 1,984,428 shares of the Company's common stock (including 882,115 shares of the Company's common stock owned of record by the Robert A. Ortenzio Descendants Trust, 503,455 shares of the Company's common stock owned of record by the Rocco A. Ortenzio Separate Descendants Trust FBO Robert A. Ortenzio, 196,286 shares of the Company's common stock owned of record by the Robert A. Ortenzio 2014 Trust for Bryan A. Ortenzio, 196,286 shares of the Company's common stock owned of record by the Robert A. Ortenzio 2014 Trust for Kevin M. Ortenzio, and 206,286 shares of the Company's common stock owned of record by the Robert A. Ortenzio 2014 Trust for Madeline G. Ortenzio)." The description of the transactions contemplated by the Repurchase Agreement set forth in Item 3 above is hereby incorporated by reference into this Item 5. Other than as described above, Schedule A attached hereto as Exhibit 99.2 describes all transactions in the shares of the Company's common stock that were effected by the Reporting Person in the past sixty days." 99.1 Stock Repurchase Agreement, dated as of August 21, 2026, by and among Concentra Group Holdings Parent, Inc. and Robert A. Ortenzio, The Robert A. Ortenzio Descendants Trust, The Robert A. Ortenzio 2014 Trust FBO Bryan A. Ortenzio, The Robert A. Ortenzio 2014 Trust FBO Kevin M. Ortenzio and The Robert A. Ortenzio 2014 Trust FBO Madeline G. Ortenzio. 99.2 Schedule A: Transactions during the past 60 days. Robert A. Ortenzio Robert A. Ortenzio 08/24/2026