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<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">As filed with the Securities and Exchange
Commission on June 13, 2017</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">Registration No. ______</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>WASHINGTON, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B></B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 12pt"><B>FORM S-8</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>REGISTRATION STATEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNDER THE SECURITIES ACT OF 1933</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 12pt"><B>Aqua Metals,
Inc.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact name of registrant as specified in
its charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="CENTER" STYLE="font: 10pt Times New Roman, Times, Serif; width: 75%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>Delaware</B></FONT></TD>
    <TD STYLE="width: 50%; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>47-1169572</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(State or other jurisdiction of</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">incorporation or organization)</P></TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(I.R.S. Employer</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Identification No.)</P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="CENTER" STYLE="font: 10pt Times New Roman, Times, Serif; width: 75%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>1010 Atlantic Avenue</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Alameda, California</B></P></TD>
    <TD STYLE="width: 50%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>94501</B></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">(Address of Principal Executive Offices)</FONT></TD>
    <TD STYLE="font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt">(Zip Code)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Amended and Restated 2014 Stock Incentive
Plan</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Full title of the plan)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<!-- Field: Rule-Page --><DIV ALIGN="CENTER" STYLE="margin-top: 0; margin-bottom: 0"><DIV STYLE="font-size: 1pt; border-top: Black 1pt solid; width: 25%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Daniel K. Donahue</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Greenberg Traurig, LLP</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>3161 Michelson Drive, Suite 1000</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Irvine, California 92612</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(949) 732-6500</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Name and address of agent for service)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(949) 732-6500</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Telephone number, including area code,
of agent for service)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Indicate by check mark whether the registrant is a large accelerated
filter, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of &ldquo;large accelerated
filer,&rdquo; &ldquo;accelerated filer,&rdquo; &ldquo;smaller reporting company,&rdquo; and &ldquo;emerging company&rdquo; in Rule
12b-2 of the Exchange Act.:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; padding-left: 0.5in; font-size: 10pt"><FONT STYLE="font-size: 10pt">Large accelerated filer <FONT STYLE="font-family: Wingdings">&uml;</FONT></FONT></TD>
    <TD STYLE="width: 50%; font-size: 10pt"><FONT STYLE="font-size: 10pt">Accelerated filer <FONT STYLE="font-family: Wingdings">x</FONT></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-left: 0.5in; font-size: 10pt"><FONT STYLE="font-size: 10pt">Non-accelerated filer <FONT STYLE="font-family: Wingdings">&uml;</FONT></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Smaller reporting company <FONT STYLE="font-family: Wingdings">&uml;</FONT></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">(Do not check if a smaller reporting company)</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Emerging growth company <FONT STYLE="font-family: Wingdings">x</FONT></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">If an emerging growth company, indicate by check mark if the
registrant has elected not to use the extended transition period for complying with any new or revised financial or accounting
standards pursuant to Section&nbsp;7(a)(2)(B) of the Securities Act. <FONT STYLE="font-family: Wingdings">x</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>CALCULATION OF REGISTRATION FEE</B></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD NOWRAP STYLE="text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>Title&nbsp;of&nbsp;Securities</B></FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>&nbsp;to&nbsp;be&nbsp;Registered</B></FONT></P></TD><TD NOWRAP STYLE="font-weight: bold; padding-bottom: 1pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD NOWRAP STYLE="font-weight: bold; text-align: center; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt">Amount&nbsp;to&nbsp;be<BR>
    Registered&nbsp;(1)</FONT></TD><TD NOWRAP STYLE="padding-bottom: 1pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD NOWRAP COLSPAN="2" STYLE="text-align: center; border-bottom: Black 1pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>Proposed&nbsp;Maximum</B><BR>
                                         <B>Offering&nbsp;</B></FONT></P> <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt"><B>Price&nbsp;per&nbsp;Share</B></FONT></P></TD><TD NOWRAP STYLE="padding-bottom: 1pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD><TD NOWRAP STYLE="font-weight: bold; padding-bottom: 1pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD NOWRAP COLSPAN="2" STYLE="font-weight: bold; text-align: center; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt">Proposed&nbsp;Maximum<BR>
    Aggregate&nbsp;Offering<BR> Price</FONT></TD><TD NOWRAP STYLE="padding-bottom: 1pt; font-weight: bold"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD><TD NOWRAP STYLE="font-weight: bold; padding-bottom: 1pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD NOWRAP COLSPAN="2" STYLE="font-weight: bold; text-align: center; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt">Amount&nbsp;of<BR>
    Registration&nbsp;Fee</FONT></TD><TD NOWRAP STYLE="padding-bottom: 1pt; font-weight: bold"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 20%; text-align: left; padding-bottom: 2.5pt"><FONT STYLE="font-size: 10pt">Common Stock</FONT></TD><TD STYLE="width: 1%; padding-bottom: 2.5pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="width: 19%; padding-bottom: 2.5pt"><FONT STYLE="font-size: 10pt">750,000 shares</FONT></TD><TD STYLE="width: 1%; padding-bottom: 2.5pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="width: 1%; border-bottom: Black 2.5pt double; text-align: left"><FONT STYLE="font-size: 10pt">$</FONT></TD><TD STYLE="width: 17%; border-bottom: Black 2.5pt double; text-align: right; padding-left: -0.5in"><FONT STYLE="font-size: 10pt">12.99</FONT></TD><TD STYLE="width: 1%; padding-bottom: 2.5pt; text-align: left"><FONT STYLE="font-size: 10pt">(2)</FONT></TD><TD STYLE="width: 1%; padding-bottom: 2.5pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="width: 1%; border-bottom: Black 2.5pt double; text-align: left"><FONT STYLE="font-size: 10pt">$</FONT></TD><TD STYLE="width: 17%; border-bottom: Black 2.5pt double; text-align: right"><FONT STYLE="font-size: 10pt">9,742,500</FONT></TD><TD STYLE="width: 1%; padding-bottom: 2.5pt; text-align: left"><FONT STYLE="font-size: 10pt">(2)</FONT></TD><TD STYLE="width: 1%; padding-bottom: 2.5pt"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="width: 1%; border-bottom: Black 2.5pt double; text-align: left"><FONT STYLE="font-size: 10pt">$</FONT></TD><TD STYLE="width: 17%; border-bottom: Black 2.5pt double; text-align: right"><FONT STYLE="font-size: 10pt">1,129.16</FONT></TD><TD STYLE="width: 1%; padding-bottom: 2.5pt; text-align: left"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-align: justify; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">(1)</TD><TD STYLE="text-align: justify">In addition, pursuant to Rule 416(c) under the Securities Act of 1933, as amended (the &ldquo;Securities
Act&rdquo;), this Registration Statement includes an indeterminate number of additional shares which may be offered and sold as
a result of anti-dilution provisions described in the above-referenced plan.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">(2)</TD><TD>Estimated solely for the purpose of calculating the amount of the registration fee and calculated pursuant to Rule 457(h)(1)
and Rule 457(c) under the Securities Act.</TD></TR></TABLE>

<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>EXPLANATORY NOTE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">This Registration Statement is being filed
by the Registrant to register 750,000 additional shares (the &ldquo;Additional Shares&rdquo;) of the Registrant&rsquo;s Common
Stock issuable under the Aqua Metals, Inc. Amended and Restated 2014 Stock Incentive Plan (the &ldquo;Plan&rdquo;). The Additional
Shares are in addition to the Common Stock previously registered for issuance on the Registrant&rsquo;s Registration Statement
on Form S-8 filed with the Securities and Exchange Commission (the &ldquo;SEC&rdquo;) on June 3, 2016 (File No. 333-211810) (the
&ldquo;Prior Registration Statement&rdquo;).</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">This Registration Statement relates to
securities of the same class as that to which the Prior Registration Statement relates, and is submitted in accordance with General
Instruction E to Form S-8 regarding registration of additional securities. Pursuant to such instruction, the contents of the Prior
Registration Statement are incorporated by reference and made part of this Registration Statement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.75in"><B>Item 8.</B></TD><TD><B>Exhibits.</B></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 32%; font-size: 10pt; text-decoration: underline"><FONT STYLE="font-size: 10pt"><B><U>Exhibit No.</U></B></FONT></TD>
    <TD STYLE="width: 68%; font-size: 10pt; text-decoration: underline"><FONT STYLE="font-size: 10pt"><B><U>Description of Exhibits</U></B></FONT></TD></TR>
</TABLE>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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    <TD STYLE="vertical-align: bottom; width: 12%; border-bottom: Black 1pt solid">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Exhibit </B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>No.</B></P></TD>
    <TD STYLE="vertical-align: top; width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 55%; border-bottom: Black 1pt solid; layout-grid-mode: line; text-align: center"><FONT STYLE="font-size: 10pt"><B>Description</B></FONT></TD>
    <TD STYLE="vertical-align: top; width: 2%">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; width: 29%; border-bottom: Black 1pt solid; layout-grid-mode: line"><FONT STYLE="font-size: 10pt"><B>Method of Filing</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">5.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt"><A HREF="s106529_ex5-1.htm">Opinion and Consent of Greenberg Traurig, LLP</A></FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Filed electronically herewith</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">23.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="s106529_ex23-1.htm"><FONT STYLE="font-size: 10pt">Consent of Armanino LLP</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Filed electronically herewith</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">23.4</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Consent of Greenberg Traurig, LLP</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Included in Exhibit 5.1</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">24.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Power of Attorney</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line"><FONT STYLE="font-size: 10pt">Included on the signature page to this registration statement</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center"><FONT STYLE="font-size: 10pt">99.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Aqua Metals, Inc. 2014 Amended and Restated Stock Incentive Plan</FONT></TD>
    <TD>&nbsp;</TD>
    <TD STYLE="layout-grid-mode: line"><FONT STYLE="font-size: 10pt">Incorporated by reference from the Company&rsquo;s Definitive Proxy Statement filed with the SEC on April&nbsp;24, 2017</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Pursuant to the requirements
of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements
of filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the city of Alameda, California on June&nbsp;13, 2017.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="text-align: justify"><FONT STYLE="font-size: 10pt; text-transform: uppercase">AQUA METALS, INC.</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 4%; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 46%; text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">By:</FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: justify"><FONT STYLE="font-size: 10pt"><I>/s/ Stephen R. Clarke</I></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Stephen R. Clarke</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Chief Executive Officer</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 21pt; text-align: justify; text-indent: 247.5pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>POWER OF ATTORNEY</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Each person whose
signature appears below hereby constitutes and appoints Stephen R. Clarke and Thomas Murphy, and each of them, as such person&rsquo;s
true and lawful attorney-in-fact and agent, each with full powers of substitution and re-substitution, for such person and in such
person&rsquo;s name, place and stead, in any and all capacities, to sign any or all amendments (including post effective amendments)
to this Registration Statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with
the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform
each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes
as such person might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent or his or
her substitute or substitutes, may lawfully do or cause to be done by virtue thereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.25in">Pursuant to the requirements
of the Securities Act of 1933, this Registration Statement has been signed on June&nbsp;13, 2017 by the following persons in the
capacities indicated.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 35%; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><B>Signature</B></FONT></TD>
    <TD STYLE="width: 6%; text-align: justify">&nbsp;</TD>
    <TD STYLE="width: 59%; border-bottom: Black 1pt solid; text-align: justify"><FONT STYLE="font-size: 10pt"><B>Title</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Stephen R. Clarke</I></FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">President, Chief Executive Officer and Director&nbsp;(Principal</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Stephen R. Clarke</FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Executive Officer) </FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Thomas Murphy</I></FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Chief Financial Officer and Director (Principal Financial </FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Thomas Murphy</FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">and Accounting Officer)</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Vincent L. DiVito</I></FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Vincent L. DiVito</FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I>/s/ Mark Slade</I></FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Mark Slade</FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><I></I></FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">Director</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD><FONT STYLE="font-size: 10pt">Mark Stevenson</FONT></TD>
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>INDEX TO EXHIBITS</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 6%; border-bottom: Black 1pt solid; text-align: justify"><FONT STYLE="font-size: 10pt"><B>No.</B></FONT></TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 50%; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><B>Item</B></FONT></TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 40%; border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt"><B>Method of Filing</B></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">5.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt"><A HREF="s106529_ex5-1.htm">Opinion and Consent of Greenberg Traurig, LLP</A></FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Filed electronically herewith</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">23.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt"><A HREF="s106529_ex23-1.htm">Consent of Armanino LLP</A></FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Filed electronically herewith</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">23.4</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Consent of Greenberg Traurig, LLP</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Included in Exhibit 5.1</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">24.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Power of Attorney</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Included on the signature page to this registration statement</FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify"><FONT STYLE="font-size: 10pt">99.1</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Aqua Metals, Inc. 2014 Amended and Restated Stock Incentive Plan</FONT></TD>
    <TD>&nbsp;</TD>
    <TD><FONT STYLE="font-size: 10pt">Incorporated by reference from the Company&rsquo;s Definitive Proxy Statement filed with
    the SEC on April 24, 2017</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


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[{"type": "S-8", "sequence": "1", "filename": "s106529_s8.htm", "description": "S-8", "secsgml_size_bytes": 35571}]
{"company-data": {"conformed-name": "Aqua Metals, Inc.", "cik": "0001621832", "assigned-sic": "3341", "irs-number": "471169572", "state-of-incorporation": "DE"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-218709", "film-number": "17909640"}, "business-address": {"street1": "1010 ATLANTIC AVENUE", "city": "ALAMEDA", "state": "CA", "zip": "94501", "phone": "(510) 479-7635"}, "mail-address": {"street1": "1010 ATLANTIC AVENUE", "city": "ALAMEDA", "state": "CA", "zip": "94501"}}
As filed with the Securities and Exchange
Commission on June 13, 2017
Registration No. ______
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER THE SECURITIES ACT OF 1933
Aqua Metals,
Inc.
(Exact name of registrant as specified in
its charter)
Delaware
47-1169572
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer
Identification No.)
1010 Atlantic Avenue
Alameda, California
94501
(Address of Principal Executive Offices)
(Zip Code)
Amended and Restated 2014 Stock Incentive
Plan
(Full title of the plan)
Daniel K. Donahue
Greenberg Traurig, LLP
3161 Michelson Drive, Suite 1000
Irvine, California 92612
(949) 732-6500
(Name and address of agent for service)
(949) 732-6500
(Telephone number, including area code,
of agent for service)
Indicate by check mark whether the registrant is a large accelerated
filter, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated
filer," "accelerated filer," "smaller reporting company," and "emerging company" in Rule
12b-2 of the Exchange Act.:
Large accelerated filer
¨
Accelerated filer
x
Non-accelerated filer
¨
Smaller reporting company
¨
(Do not check if a smaller reporting company)
Emerging growth company
x
If an emerging growth company, indicate by check mark if the
registrant has elected not to use the extended transition period for complying with any new or revised financial or accounting
standards pursuant to Section 7(a)(2)(B) of the Securities Act.
x
CALCULATION OF REGISTRATION FEE
Title of Securities
to be Registered
Amount to be
Registered (1)
Proposed Maximum
Offering
Price per Share
Proposed Maximum
Aggregate Offering
Price
Amount of
Registration Fee
Common Stock
750,000 shares
$
12.99
(2)
$
9,742,500
(2)
$
1,129.16
(1)
In addition, pursuant to Rule 416(c) under the Securities Act of 1933, as amended (the "Securities
Act"), this Registration Statement includes an indeterminate number of additional shares which may be offered and sold as
a result of anti-dilution provisions described in the above-referenced plan.
(2)
Estimated solely for the purpose of calculating the amount of the registration fee and calculated pursuant to Rule 457(h)(1)
and Rule 457(c) under the Securities Act.
EXPLANATORY NOTE
This Registration Statement is being filed
by the Registrant to register 750,000 additional shares (the "Additional Shares") of the Registrant's Common
Stock issuable under the Aqua Metals, Inc. Amended and Restated 2014 Stock Incentive Plan (the "Plan"). The Additional
Shares are in addition to the Common Stock previously registered for issuance on the Registrant's Registration Statement
on Form S-8 filed with the Securities and Exchange Commission (the "SEC") on June 3, 2016 (File No. 333-211810) (the
"Prior Registration Statement").
This Registration Statement relates to
securities of the same class as that to which the Prior Registration Statement relates, and is submitted in accordance with General
Instruction E to Form S-8 regarding registration of additional securities. Pursuant to such instruction, the contents of the Prior
Registration Statement are incorporated by reference and made part of this Registration Statement.
Item 8.
Exhibits.
Exhibit No.
Description of Exhibits
Exhibit
No.
Description
Method of Filing
5.1
Opinion and Consent of Greenberg Traurig, LLP
Filed electronically herewith
23.1
Consent of Armanino LLP
Filed electronically herewith
23.4
Consent of Greenberg Traurig, LLP
Included in Exhibit 5.1
24.1
Power of Attorney
Included on the signature page to this registration statement
99.1
Aqua Metals, Inc. 2014 Amended and Restated Stock Incentive Plan
Incorporated by reference from the Company's Definitive Proxy Statement filed with the SEC on April 24, 2017
SIGNATURES
Pursuant to the requirements
of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements
of filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the city of Alameda, California on June 13, 2017.
AQUA METALS, INC.
By:
/s/ Stephen R. Clarke
Stephen R. Clarke
Chief Executive Officer
POWER OF ATTORNEY
Each person whose
signature appears below hereby constitutes and appoints Stephen R. Clarke and Thomas Murphy, and each of them, as such person's
true and lawful attorney-in-fact and agent, each with full powers of substitution and re-substitution, for such person and in such
person's name, place and stead, in any and all capacities, to sign any or all amendments (including post effective amendments)
to this Registration Statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, with
the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and perform
each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes
as such person might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent or his or
her substitute or substitutes, may lawfully do or cause to be done by virtue thereof.
Pursuant to the requirements
of the Securities Act of 1933, this Registration Statement has been signed on June 13, 2017 by the following persons in the
capacities indicated.
Signature
Title
/s/ Stephen R. Clarke
President, Chief Executive Officer and Director (Principal
Stephen R. Clarke
Executive Officer)
/s/ Thomas Murphy
Chief Financial Officer and Director (Principal Financial
Thomas Murphy
and Accounting Officer)
/s/ Vincent L. DiVito
Director
Vincent L. DiVito
/s/ Mark Slade
Director
Mark Slade
Director
Mark Stevenson
2
INDEX TO EXHIBITS
No.
Item
Method of Filing
5.1
Opinion and Consent of Greenberg Traurig, LLP
Filed electronically herewith
23.1
Consent of Armanino LLP
Filed electronically herewith
23.4
Consent of Greenberg Traurig, LLP
Included in Exhibit 5.1
24.1
Power of Attorney
Included on the signature page to this registration statement
99.1
Aqua Metals, Inc. 2014 Amended and Restated Stock Incentive Plan
Incorporated by reference from the Company's Definitive Proxy Statement filed with
    the SEC on April 24, 2017