v3.26.1
Cover
Aug. 03, 2026
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 03, 2026
Entity File Number 001-43431
Entity Registrant Name ARC Group Securities Acquisition I
Entity Central Index Key 0002094712
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One 398 Mill Avenue
Entity Address, Address Line Two Suite 306
Entity Address, City or Town Tempe
Entity Address, State or Province AZ
Entity Address, Postal Zip Code 85281
City Area Code (928)
Local Phone Number 625-0928
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, one warrant, and one right to acquire 1/4  
Title of 12(b) Security Units, each consisting of one Class A Ordinary Share, par value $0.0001 per share, one warrant, and one right to acquire 1/4
Trading Symbol FJDIU
Security Exchange Name NASDAQ
Class A Ordinary Shares included as part of the Units  
Title of 12(b) Security Class A Ordinary Shares included as part of the Units
Trading Symbol FJDI
Security Exchange Name NASDAQ
Rights included as part of the Units  
Title of 12(b) Security Rights included as part of the Units
Trading Symbol FJDIR
Security Exchange Name NASDAQ
Warrants, each warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share  
Title of 12(b) Security Warrants, each warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share
Trading Symbol FJDIW
Security Exchange Name NASDAQ