v3.26.3
Cover
Oct. 09, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Oct. 09, 2026
Entity File Number 001-42622
Entity Registrant Name Copley Acquisition Corp
Entity Central Index Key 0002045473
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One Suite 1801-1803, 18/K
Entity Address, Address Line Two Alexandra House
Entity Address, Address Line Three 18 Chater Road
Entity Address, City or Town Central
Entity Address, Country HK
Entity Address, Postal Zip Code 00000
City Area Code +852
Local Phone Number 2861 3335
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period false
Units, each consisting of one Class A ordinary share and one-half of one warrant  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-half of one warrant
Trading Symbol COPLU
Security Exchange Name NYSE
Class A ordinary shares, par value $0.0001 per share  
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share
Trading Symbol COPL
Security Exchange Name NYSE
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share  
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol COPLW
Security Exchange Name NYSE