UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ________________________________________________________________ Form 10-K ☒ Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the fiscal year ended December 31, 2023 OR ☐ Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission file number: 001-37576 Surgery Partners, Inc. (Exact name of registrant as specified in its charter) Delaware 47-3620923 (State o ...