UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 11, 2025

Surgery Partners, Inc.

(Exact Name of Registrant as Specified in Charter)

340 Seven Springs Way, Suite 600

Brentwood, Tennessee 37027

(Address of Principal Executive Offices) (Zip Code)

(615) 234-5900

(Registrant’s Telephone Number, Including Area Code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b- 2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

On December 11, 2025, Surgery Center Holdings, Inc. (the “Issuer”), entered into a purchase agreement with Barclays Capital Inc. as representative of certain initial purchasers, relating to the issuance and sale of $425.0 million in aggregate principal amount of the Issuer’s 7.250% senior unsecured notes due 2032 (the “Offering”). The net proceeds from the Offering will be used for general corporate purposes, including, but not limited to, repaying outstanding borrowings under its revolving credit facility. The consummation of the Offering is subject to market and other conditions.

On December 11, 2025, Surgery Partners, Inc. issued a press release announcing the pricing of the notes offering. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.