Company: IMRX
Filing Date: 2025-04-21
Form Type: DEF 14A
Source: 0001790340-25-000053
Chunk: 0

Company: Immuneering Corp
Filing Date: 2025-04-21
Form: DEF 14A
Chunk 0
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TABLE OF CONTENTS

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
<div align='center'>___________________________</div>

#### SCHEDULE 14A

#### Proxy Statement Pursuant to Section 14(a) of the

#### Securities Exchange Act of 1934
<div align='center'>(Amendment No. )

___________________________</div>

| Filed by the Registrant |     | x |     | Filed by a party other than the Registrant |     | o |

Check the appropriate box:

| o |     | Preliminary Proxy Statement                                                     |
| o |     | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| x |     | Definitive Proxy Statement                                                      |
| o |     | Definitive Additional Materials                                                 |
| o |     | Soliciting Material Pursuant to §240.14a-12                                     |

| Immuneering Corporation                          |
| (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):

| x |     | No fee required                                                                                     |
| o |     | Fee paid previously with preliminary materials                                                      |
| o |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

TABLE OF CONTENTS

#### Immuneering Corporation
<div align='center'>245 Main Street

Second Floor

Cambridge, MA 02142</div>

### NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

#### TO BE HELD ON JUNE 13, 2025
NOTICE HEREBY IS GIVEN that the Annual Meeting of Stockholders of Immuneering Corporation, a Delaware corporation, will be held on Friday, June 13, 2025 at 10:00 a.m. Eastern Time. The Annual Meeting will be a completely virtual meeting and will be held via live webcast. You will be able to attend the Annual Meeting online and submit your questions during the meeting by visiting www.virtualshareholdermeeting.com/IMRX2025. The meeting is being held for the following purposes, as more fully described in the accompanying proxy statement.

The Annual Meeting is being held:

1. to elect Ann E. Berman,