NEW YORK--(BUSINESS WIRE)--Fitch Ratings has assigned the Long-term Issuer Default Rating (IDR) and unsecured debt rating of Apollo Principal Holdings X, L.P. 'A-'. This entity is a subsidiary of Apollo Global Management, LLC (together with its subsidiaries, 'Apollo')). The Rating Outlook is Stable. A full list of rating actions follows at the end of this release. KEY RATING DRIVERS IDR AND SENIOR DEBT Apollo Principal Holdings X, L.P., together with Apollo Management Holdings, L.P., Apollo Pri