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 (Amendment No.       )

Filed by the Registrant  x

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

x Definitive Additional Materials

¨ Soliciting Material under §240.14a-12

IMPAC MORTGAGE HOLDINGS, 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 the appropriate box):

x No fee required.

¨ Fee paid previously with preliminary materials.

¨ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a6(i)(1) and 0-11.

Get informed before you vote *If you choose to vote these shares in person at the meeting, you must request a “legal proxy.” To do so, please follow the instructions at www.ProxyVote.com or request a paper copy of the materials, which will contain the appropriate instructions. Please check the meeting materials for any special requirements for meeting attendance. Smartphone users Point your camera here and vote without entering a control number Your Vote Counts! FLASHID-JOB# For complete information and to vote, visit www.ProxyVote.com Control # Ricky Campana P.O. Box 123456 Suite 500 51 Mercedes Way Edgewood, NY 11717 148,294 322,224 1 OF 2 30# Hextone, Inc. P.O. Box 9142 Farmingdale, NY 11735 XXXX XXXX XXXX XXXX IMPAC MORTGAGE HOLDINGS, INC. 2023 Annual Meeting Vote by June 14, 2023 11:59 PM ET You invested in IMPAC MORTGAGE HOLDINGS, 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 material for the shareholder meeting to be held on June 15, 2023. View the Annual Report, Proxy Statement online OR you can receive a free paper or email copy of the material(s) by requesting prior to June 02, 2023. If you would like to request a copy of the material(s) for this and/or future shareholder 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) in the subject line. Unless requested, you will not otherwise receive a paper or email copy. Vote in Person at the Meeting* June 15, 2023 9:00 AM PDT Annual Meeting to be held virtually: To attend, you must register as a Beneficial Holder at the below URL: https://viewproxy.com/impaccompanies/2023/htype.asp

Voting Items Board Recommends THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Vote at www.ProxyVote.com FLASHID-JOB# Control # XXXX XXXX XXXX XXXX 1.00000 322,224 148,294 Under New York Stock Exchange rules, brokers may vote “routine” matters at their discretion if your voting instructions are not communicated to us at least 10 days before the meeting. We will nevertheless follow your instructions, even if the broker’s discretionary vote has already been given, provided your instructions are received prior to the meeting date. IMPAC MORTGAGE HOLDINGS, INC. 2023 Annual Meeting Vote by June 14, 2023 11:59 PM ET 1. Election of Directors Nominees: 01 Katherine J. Blair 03 Joseph A. Piscina 02 Frank P. Filipps 04 George A. Mangiaracina For 2. Approval, on an advisory basis, of the compensation of named executive officers. For 3. Ratification of the First Amendment to the Tax Benefits Preservation Rights Agreement. For 4. Ratification of the appointment of Baker Tilly US, LLP as the Company's independent registered public accounting firm for the year ending December 31, 2023. For 5. Such other business as may properly come before the meeting or any adjournment thereof.

IMPAC MORTGAGE HOLDINGS, INC. Important Notice Regarding the Internet Availability of Proxy Materials for the Annual Meeting of Stockholders to be held at 9:00 A.M. on June 15, 2023 This communication is not a form for voting and presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. The Proxy Statement and Annual Report to Stockholders are available at http://www.viewproxy.com/impaccompanies/2023/ If you want to receive a paper or e-mail copy of these documents, you must request one. There is no charge to you for requesting a copy. Please make your request for a copy as instructed below on or before June 7, 2023 to facilitate timely delivery. Important information regarding the Internet availability of the Company’s proxy materials, instructions for accessing your proxy materials and voting online and instructions for requesting paper or e-mail copies of your proxy materials are provided on the reverse side of this Notice. STOCKHOLDERS ARE CORDIALLY INVITED TO ATTEND THE ANNUAL MEETING AND VOTE VIRTUALLY VIA THE INTERNET. The Securities and Exchange Commission rules permit us to make our proxy materials available to our stockholders via the Internet. Material for this annual meeting and future meetings may be requested by one of the following methods: Toview your proxy materials online, go to http://viewproxy.com/impaccompanies/2023/. Have your 11 digit control number (located below) available when you access the website and follow the instructions. 877-777-2857 TOLL FREE requests@viewproxy.com * If requesting material by e-mail, please send a blank e-mail with the company name and your 11 digit control number (located below) in the subject line. No other requests, instructions or other inquiries should be included with your e-mail requesting material. You must use the 11 digit control number located in the box below. To the Stockholders of IMPAC MORTGAGE HOLDINGS, INC.: The 2023 Annual Meeting of Stockholders of Impac Mortgage Holdings, Inc. will be held virtually on June 15, 2023 at 9:00 AM PDT. As a Registered Holder, you may vote your shares at the Annual Meeting of Stockholders by first registering at http://viewproxy.com/ impaccompanies/2023/htype.asp and then using your Virtual Control Number below. Your registration must be received by 11:59 PM PDT on June 12, 2023. On the day of the Annual Meeting of Stockholders, if you have properly registered, you will log in using the password you received via email in your registration confirmation and follow instructions to vote your shares. Please have your Virtual Control Number with you during the meeting in order to vote. For further instructions on how to attend and vote at the Annual Meeting of Stockholders, please see the sections of the Proxy Statement titled “Registering to attend the Virtual Meeting” and “Voting Requirements and Procedures.” Proposals to be voted on at the meeting are listed below along with recommendations of the Board of Directors. 1. Election of Directors Nominees: 01 Katherine J. Blair 02 Frank P. Filipps 03 George A. Mangiaracina 04 Joseph A. Piscina 2. Approval, on an advisory basis, of the compensation of named executive officers. 3. Ratification of the First Amendment to the Tax Benefits Preservation Rights Agreement. 4. Ratification of the appointment of Baker Tilly US, LLP as the Company’s independent registered public accounting firm for the year ending December 31, 2023. 5. Such other business as may properly come before the meeting or any adjournments or postponements thereof. The Board of Directors recommends you vote FOR all nominees listed in Proposal 1 and FOR Proposals 2, 3 and 4. CONTROL NO. INTERNET TELEPHONE E-MAIL

IMPAC MORTGAGE HOLDINGS, INC. 4000 MacArthur Blvd., Suite 6000 Newport Beach, CA 92660 The following proxy materials are available to you for review at: www.viewproxy.com/impaccompanies/2023/ ● 2022 Annual Report ● Proxy Statement ACCESSING YOUR PROXY MATERIALS ONLINE Have this notice available when you request a paper copy of the proxy materials or to vote your proxy electronically. You must reference your control number to vote by Internet or request a paper copy. You May Vote Your Proxy When You View The Materials On The Internet. You Will Be Asked To Follow The Prompts To Vote Your Shares. Your electronic vote authorizes the named proxies to vote your shares in the same manner as if you marked, signed, dated and returned the proxy card. Early voting via the Internet and telephone is available through 11:59 P.M. Eastern Daylight Time on June 14, 2023. You may also vote online during the annual meeting at www.AALVote.com/IMH REQUESTING A PAPER COPY OF THE PROXY MATERIALS By telephone please call 1-877-777-2857 toll free or By logging onto http://viewproxy.com/impaccompanies/2023/ or By email at requests@viewproxy.com Please include the company name and your control number in the e-mail subject line.