SCHEDULE 13G

ASPEN INSURANCE HOLDINGS LTD

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

Event date: 2025-06-30

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 Advisors IX (EH), L.P.

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

• Apollo Advisors IX (EH-GP), LLC

  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%

• Apollo Investment Fund IX, L.P.

  Shares: 20,209,587.00 · Class: 22.0%

• Apollo Overseas Partners (Delaware 892) IX, L.P.

  Shares: 11,795,043.00 · Class: 12.8%

• Apollo Overseas Partners (Delaware) IX, L.P.

  Shares: 4,098,066.00 · Class: 4.5%

• Apollo Overseas Partners (Lux) IX, SCSp

  Shares: 2,943,970.00 · Class: 3.2%

• Apollo Overseas Partners (Lux) IX GP, S.a r.l.

  Shares: 2,943,970.00 · Class: 3.2%

• Apollo Overseas Partners IX, L.P.

  Shares: 7,760,991.00 · Class: 8.5%

• Apollo Advisors IX, L.P.

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

• Apollo Capital Management IX, LLC

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

• Apollo Management IX, L.P.

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

• AIF IX Management, LLC

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

• 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.