v3.26.1
Document And Entity Information
Aug. 10, 2026
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 10, 2026
Entity Registrant Name Apogee Therapeutics, Inc.
Entity Central Index Key 0001974640
Entity Emerging Growth Company false
Entity File Number 001-41740
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 93-4958665
Entity Address, Address Line One 1 Letterman Drive
Entity Address, Address Line Two Building B
Entity Address, Address Line Three Suite B6-800
Entity Address, City or Town San Francisco
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94129
City Area Code (650)
Local Phone Number 394-5230
Entity Information, Former Legal or Registered Name  
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.00001 per share
Trading Symbol APGE
Security Exchange Name NASDAQ
Former Address [Member]  
Document Information [Line Items]  
Entity Address, Address Line One 221 Crescent St., Bldg 17, Suite 102b
Entity Address, City or Town Waltham
Entity Address, State or Province MA
Entity Address, Postal Zip Code 02453