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Cover
Jul. 24, 2025
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 24, 2025
Current Fiscal Year End Date --12-31
Entity File Number 001-41757
Entity Registrant Name HAYMAKER ACQUISITION CORP. 4
Entity Central Index Key 0001970509
Entity Tax Identification Number 87-2213850
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 501 Madison Avenue
Entity Address, Address Line Two Floor 5
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10022
City Area Code 212
Local Phone Number 616-9600
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 [Member]  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant
Trading Symbol HYACU
Security Exchange Name NYSE
Common Class A [Member]  
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share
Trading Symbol HYAC
Security Exchange Name NYSE
Warrants [Member]  
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 HYAC WS
Security Exchange Name NYSE