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

Filed by the Registrant  ☒Filed by a Party other than the Registrant  ☐

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☐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

Gold Resource Corporation

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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You invested in GOLD RESOURCE CORPORATION and it's time to vote! You have the right to vote on proposals being presented at the Annual Meeting. Thisis an important notice regarding the availability of proxy material for the shareholder meeting to be held on June 15, 2023. Get informed before you vote View the Notice & Proxy Statement, Annual Report online OR you can receive a free paper or email copy of the material(s) by requestingpriortoJune01, 2023.Ifyouwouldliketorequestacopyofthematerial(s)forthisand/orfutureshareholdermeetings, youmay(1)visitwww.ProxyVote.com,(2)call1‐800‐579‐1639or(3)sendanemailtosendmaterial@proxyvote.com.Ifsendingan email,pleaseincludeyourcontrolnumber(indicatedbelow)inthesubjectline.Unlessrequested,youwillnototherwisereceivea paper or email copy. For complete information and to vote, visit www.ProxyVote.com Control# Smartphone users Pointyour camerahereand votewithoutentering a control number Vote in Person at the Meeting* June 15, 2023 10:00AM MDT 7800 East Union Avenue Denver co 80237 *If youchoose tovote these sharesinpersonatthemeeting, youmustrequest a "legalproxy." Todo so, pleasefollow theinstructionsatwww.ProxyVote.comorrequesta paper copy ofthe materials, which will contain the appropriate instructions. Please check the meeting materialsfor any specialrequirementsformeeting attendance. 2023 Annual Meeting Vote by June 14, 2023 11 :59 PM ET

Vote at www.ProxyVote.com 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. Voting Items GOLD RESOURCE CORPORATION 2023 Annual Meeting Vote by June 14, 2023 11:59PMET Board Recommends 1. Election ofDirectors Nominees: 01) Alex G. Morrison 03) Lila Manassa Murphy 05) Ronald Little 0For 02) Allen Palmiere 04) Joseph Driscoll 2. Advisory vote to approve executive compensation. 0For 3. Non‐binding advisory vote to approve the frequency of future advisory votes on executive compensation. 0Year 4. Ratify BDO USA, LLP as independent registered accounting firm for 2023. 0For NOTE: To transact such other business as may properly come before the meeting or any adjournment thereof.