X0508 4 2023-08-09 0001865494 IO Biotech, Inc. IOBT 0001591046 Lundbeckfond Invest A/S C/O IO BIOTECH, INC. OLE MAALOES VEJ 3 COPENHAGEN G7 2200 DENMARK true true false Common Stock 2023-08-09 4 A 0 7901234 1.9 A 13950686 D Warrants (Right to Buy) 2.47 2023-08-09 4 A 0 7901234 0.125 A 2023-08-09 Common Stock 7901234 7901234 D These warrants expire at 5:00 p.m. Eastern time on the earlier of (i) February 9, 2027, and (ii) one day prior to the closing of an Acquisition (as such term is defined in the Form of Warrant, attached as Exhibit 4.1 to the Issuer's Current Report on Form 8-K, filed with the Securities and Exchange Commission on August 7, 2023). Christian Elling is Managing Partner of Lundbeckfonden Emerge, a division of Lundbeckfond Invest A/S, and currently serves as the representative of Lundbeckfond Invest A/S on the Issuer's board of directors, and therefore Lundbeckfond Invest A/S may be deemed a "director by deputization" of the Issuer. Lundbeckfond Invest A/S, by: /s/ Brian Burkavage, Attorney-in-Fact for Christian Elling, Managing Partner, and Lene Skole, Chief Executive Officer 2023-08-11