SCHEDULE 13G/A

ASPEN INSURANCE HOLDINGS LTD

Class A Ordinary Shares, par value $0.001 per share · CUSIP: G05384501

Event date: 2025-09-30

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Apollo Management Holdings GP, LLC

  Shares: 75,418,220.00 · Class: 82.1%

• AP Highlands Co-Invest, L.P.

  Shares: 28,610,563.00 · Class: 31.2%

• Apollo Co-Investment Management, LLC

  Shares: 28,610,563.00 · Class: 31.2%

• Apollo Management, L.P.

  Shares: 28,610,563.00 · Class: 31.2%

• Apollo Management GP, LLC

  Shares: 28,610,563.00 · Class: 31.2%

• AP Highlands Holdings, L.P.

  Shares: 46,807,657.00 · Class: 51.0%

• AP Highlands Holdings (GP), LLC

  Shares: 46,807,657.00 · Class: 51.0%

• AIF IX International Holdings, L.P.

  Shares: 46,807,657.00 · Class: 51.0%

• APH Holdings, L.P.

  Shares: 46,807,657.00 · Class: 51.0%

• Apollo Principal Holdings A, L.P.

  Shares: 46,807,657.00 · Class: 51.0%

• Apollo Principal Holdings A GP, Ltd.

  Shares: 46,807,657.00 · Class: 51.0%

• Apollo Advisors IX (EH), L.P.

  Shares: 75,418,220.00 · Class: 82.1%

• Apollo Advisors IX (EH-GP), LLC

  Shares: 75,418,220.00 · Class: 82.1%

• Apollo Management Holdings, L.P.

  Shares: 75,418,220.00 · Class: 82.1%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.