UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 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): June 30, 2026

Apollo IG Core Replacement, L.P.

(Exact name of Registrant as Specified in Charter)

(212) 515-3200

(Registrant’s telephone number, including area code)

Not Applicable
(Former Name or Former Address, if Changed Since Last Report)

_____________________

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:

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 July 1, 2026, Apollo IG Core Replacement, L.P. (“Apollo IG Core”) issued unregistered limited partnership interests (the “Interests”) for aggregate consideration of approximately $500.0 million in cash.

The offer and sale of the Interests were made as part of Apollo IG Core’s continuous private offering and were exempt from the registration provisions of the Securities Act of 1933, as amended, pursuant to Section 4(a)(2), including Regulation D and/or Regulation S thereunder.

On June 30, 2026, Apollo IG Core entered into a Second Amended and Restated Agreement of Limited Partnership (the “Partnership Agreement”) with Apollo IG Core Replacement Advisors, L.P., a Cayman Islands exempted limited partnership, in its capacity as general partner of Apollo IG Core (the “General Partner”), and each of Apollo IG Core’s limited partners, which Partnership Agreement implements the addition of two additional aggregator entities into the fund structure. The Partnership Agreement amends and restates in its entirety the Amended and Restated Agreement of Limited Partnership of Apollo IG Core, dated as of August 1, 2025. A description of the Partnership Agreement was included under “Item 1. Business - General Overview - Partnership Agreement” of Apollo IG Core’s Annual Report on Form 10-K and is incorporated by reference herein.

The foregoing description of the Partnership Agreement does not purport to be complete and is qualified in its entirety by reference to the Partnership Agreement, a copy of which is filed as Exhibit 3.1 to this Current Report on Form 8-K and is incorporated herein by reference.

On July 1, 2026, the investment manager of Apollo IG Core determined the net asset value of Apollo IG Core as of May 31, 2026 was $1,836.8 million. For additional information, please see Exhibit 99.1 to this Current Report on Form 8-K, which is incorporated herein by reference.

(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.

ATTACHMENTS / EXHIBITS

EXHIBIT 3.1

EXHIBIT 99.1

XBRL SCHEMA FILE

XBRL LABEL FILE

XBRL PRESENTATION FILE

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