v3.25.2
Cover
Jul. 28, 2025
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 28, 2025
Entity File Number 001-42392
Entity Registrant Name Bleichroeder Acquisition Corp. I
Entity Central Index Key 0002028707
Entity Tax Identification Number 98-1797826
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 1345 Avenue of the Americas
Entity Address, Address Line Two Fl 47
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10105
City Area Code 212
Local Phone Number 984-3835
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 right  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one right
Trading Symbol BACQU
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 BACQ
Security Exchange Name NASDAQ
Rights, each right entitling the holder to receive one-tenth (1/10) of one Class A ordinary share  
Title of 12(b) Security Rights, each right entitling the holder to receive one-tenth (1/10) of one Class A ordinary share
Trading Symbol BACQR
Security Exchange Name NASDAQ