v3.26.1
Cover
May 08, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date May 08, 2026
Entity File Number 001-42871
Entity Registrant Name STONEBRIDGE ACQUISITION II CORPORATION
Entity Central Index Key 0002043630
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One One World Trade Center
Entity Address, Address Line Two Suite 8500
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10007
City Area Code (646)
Local Phone Number 314-3555
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, par value $0.0001 per share, and one Right to acquire one-tenth of one Class A Ordinary Share  
Title of 12(b) Security Units, each consisting of one Class A Ordinary Share, par value $0.0001 per share, and one Right to acquire one-tenth of one Class A Ordinary Share
Trading Symbol APACU
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 APAC
Security Exchange Name NASDAQ
Rights, each Right to acquire one-tenth of one Class A Ordinary Share  
Title of 12(b) Security Rights, each Right to acquire one-tenth of one Class A Ordinary Share
Trading Symbol APACR
Security Exchange Name NASDAQ