v3.26.1
Cover
Jul. 06, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 06, 2026
Current Fiscal Year End Date --12-31
Entity File Number 001-43387
Entity Registrant Name Bleichroeder Acquisition Corp. III
Entity Central Index Key 0002128045
Entity Tax Identification Number 98-1931116
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-fourth of one redeemable warrant  
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-fourth of one redeemable warrant
Trading Symbol BCCQU
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 BCCQ
Security Exchange Name NASDAQ
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share  
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol BCCQW
Security Exchange Name NASDAQ