Company: IOBT
Filing Date: 2025-04-25
Form Type: DEFA14A
Source: 0000950170-25-058704
Chunk: 0

Company: IO Biotech, Inc.
Filing Date: 2025-04-25
Form: DEFA14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |

| ☐ | Definitive Proxy Statement |

| ☒ | Definitive Additional Materials |

| ☐ | Soliciting Material under §240.14a-12 |

IO BIOTECH, INC. (Name of Registrant as Specified in its Charter) (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant) Payment of Filing Fee (Check all boxes that apply):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

LOGO IO BIOTECH, INC. OLE MAALØES VEJ 3 DK-2200 COPENHAGEN N DENMARK Your Vote Counts! IO BIOTECH, INC. 2025 Annual Meeting Vote by June 4, 2025 11:59 PM ET V74606-P25213 You invested in IO BIOTECH, INC. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on June 5, 2025. Get informed before you vote View the Notice & Proxy Statement and Form-10K online OR you can receive a free paper or email copy of the material(s) by requesting prior to May 22, 2025. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below