Company: NGVT
Filing Date: 2025-03-31
Form Type: DEFA14A
Source: 0001140361-25-011160
Chunk: 0

Company: Ingevity Corp
Filing Date: 2025-03-31
Form: DEFA14A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### 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   ☒

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 Pursuant to §240.14a-12 |

### INGEVITY CORPORATION
<div align='center'>**(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than The Registrant)**</div>

Payment of Filing Fee (Check the appropriate box):

| ☒ | 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 |

On March 30, 2025, Ingevity Corporation (the “ Company ”) filed a Current Report on Form 8-K (the “ Cooperation Agreement 8-K ”) with the Securities and Exchange Commission (the “ SEC ”)
      disclosing its entry into a Cooperation Agreement with Vision One Fund, LP and certain of its affiliates. The Company is filing this Form DEFA14A on Schedule 14A to update the Company’s Definitive Proxy Statement (the “ Proxy Statement ”) filed
      with the SEC on March 20, 2025 with the information contained in the Cooperation Agreement 8-K. The below information supplements, and
      should be read in conjunction with, the Proxy Statement.

| Item 1.01 | Entry Into a Material Definitive Agreement. |

Cooperation Agreement

On March 30, 2025, Ingevity Corporation (the “ Company ”) entered into a cooperation agreement (the “ Cooperation Agreement ”) with Vision One Fund, LP and certain of its affiliates (the “ Vision One Parties ”).

P