v3.26.1
Cover
Jun. 11, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Jun. 11, 2026
Current Fiscal Year End Date --12-31
Entity File Number 001-43341
Entity Registrant Name JAB Acquisition Corp I
Entity Central Index Key 0002128739
Entity Tax Identification Number 41-2462795
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 270 Sylvan Avenue Suite 2230
Entity Address, City or Town Englewood Cliffs
Entity Address, State or Province NJ
Entity Address, Postal Zip Code 07632
City Area Code 201
Local Phone Number 899-4470
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 redeemable warrant  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant
Trading Symbol JABRU
Security Exchange Name NASDAQ
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 JAB
Security Exchange Name NASDAQ
Warrants, each whole warrant exercisable for one Class A ordinary share  
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A ordinary share
Trading Symbol JABRW
Security Exchange Name NASDAQ
Rights to receive one-fourth (¼th) of one Class A ordinary share  
Title of 12(b) Security Rights to receive one-fourth (¼th) of one Class A ordinary share
Trading Symbol JABRR
Security Exchange Name NASDAQ