v3.26.1
Cover
Mar. 26, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Mar. 26, 2026
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 324 Royal Palm Way
Entity Address, Address Line Two Suite 300-i
Entity Address, City or Town Palm Beach
Entity Address, State or Province FL
Entity Address, Postal Zip Code 33480
City Area Code 212
Local Phone Number 616-9600
Written Communications true
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