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    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">UNITED STATES</div>

    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">SECURITIES AND EXCHANGE COMMISSION</div>

    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">WASHINGTON, D.C. 20549</div>

    <div><br />
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    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 14pt; font-weight: bold;">FORM <ix:nonNumeric name="dei:DocumentType" id="Fact_250c2255888f45d3a27f92f59f2ced5b" contextRef="c20210527to20210527">8-K</ix:nonNumeric></div>

    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">CURRENT REPORT</div>

    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</div>

    <div><br />
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    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Date of Report (Date of earliest event reported):&#160; <span style="text-decoration: underline;"><ix:nonNumeric name="dei:DocumentPeriodEndDate" id="Fact_d35bbb09fe884348ac6ac8b38a5f1092" contextRef="c20210527to20210527" format="ixt:datemonthdayyearen">May 27, 2021</ix:nonNumeric></span></div>

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    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>

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    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(Exact name of Registrant as specified in its charter)</div>

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            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(State or Other Jurisdiction</div>
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            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(Commission File Number)</div>
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            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(I.R.S. Employer Identification No.)</div>
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    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(Address of principal executive offices)</div>

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    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><span style="text-decoration: underline;">Not Applicable</span></div>

    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(Former Name or former address, if changed since last report)</div>

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    <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Securities registered pursuant to Section 12(b) of the Act:</div>

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            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
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            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Trading</div>
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Symbol</div>
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            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
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    <td style="width: 43.84%; vertical-align: bottom; border-bottom: #000000 2px solid;">
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    <td style="width: 38.03%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><ix:nonNumeric name="dei:Security12bTitle" id="Fact_68e7e980b45e4607950cec6ddee92cb7" contextRef="c20210527to20210527">Common Stock, $0.01 Par Value</ix:nonNumeric><br />
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    <td style="width: 1.66%; vertical-align: bottom;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
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    <td style="width: 14.82%; vertical-align: bottom;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><ix:nonNumeric name="dei:TradingSymbol" id="Fact_e99a8438d8f84f5aa30157138e4b47cf" contextRef="c20210527to20210527">WSBF</ix:nonNumeric><br />
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            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
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    <td style="width: 43.84%; vertical-align: bottom;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><ix:nonNumeric name="dei:SecurityExchangeName" id="Fact_ab18f23af85c496eb57d2a6bd551ac31" contextRef="c20210527to20210527" format="ixt-sec:exchnameen">The NASDAQ Stock Market LLC</ix:nonNumeric><br />
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    <div><br />
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    <div><br />
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    <td colspan="2" style="width: 100%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the
              following provisions:</div>
          </td>

  </tr>

  <tr>

    <td colspan="2" style="width: 100%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

  </tr>

  <tr>

    <td style="width: 5.64%; vertical-align: middle;">
            <div style="text-align: center; font-family: 'Segoe UI Symbol', sans-serif; font-size: 10pt;"><ix:nonNumeric name="dei:WrittenCommunications" id="Fact_835a2b19d2b64718880ea4e499274157" contextRef="c20210527to20210527" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
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    <td style="width: 94.36%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</div>
          </td>

  </tr>

  <tr>

    <td style="width: 5.64%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

    <td style="width: 94.36%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

  </tr>

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    <td style="width: 5.64%; vertical-align: middle;">
            <div style="text-align: center; font-family: 'Segoe UI Symbol', sans-serif; font-size: 10pt;"><ix:nonNumeric name="dei:SolicitingMaterial" id="Fact_548e21f1c1dd4f6d9ced669a2612abfb" contextRef="c20210527to20210527" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
            </div>
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    <td style="width: 94.36%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</div>
          </td>

  </tr>

  <tr>

    <td style="width: 5.64%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

    <td style="width: 94.36%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

  </tr>

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    <td style="width: 5.64%; vertical-align: middle;">
            <div style="text-align: center; font-family: 'Segoe UI Symbol', sans-serif; font-size: 10pt;"><ix:nonNumeric name="dei:PreCommencementTenderOffer" id="Fact_a52b83376d574ca8bba50df0b8a553d0" contextRef="c20210527to20210527" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
            </div>
          </td>

    <td style="width: 94.36%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act</div>
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(17 CFR 240.14d-2(b))</div>
          </td>

  </tr>

  <tr>

    <td style="width: 5.64%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

    <td style="width: 94.36%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

  </tr>

  <tr>

    <td style="width: 5.64%; vertical-align: middle;">
            <div style="text-align: center; font-family: 'Segoe UI Symbol', sans-serif; font-size: 10pt;"><ix:nonNumeric name="dei:PreCommencementIssuerTenderOffer" id="Fact_e08fb868fe6c49c8ae12aa57d765569b" contextRef="c20210527to20210527" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
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    <td style="width: 94.36%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act</div>
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(17 CFR 240.13e-4(c))</div>
          </td>

  </tr>

  <tr>

    <td style="width: 5.64%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

    <td style="width: 94.36%; vertical-align: middle;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

  </tr>


</table>
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    <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or
      Rule 12b-2 of the Securities and Exchange Act of 1934 (&#167;240.12b-2 of this chapter).</div>

    <div><br />
    </div>

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    <td style="width: 5.76%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Segoe UI Symbol', sans-serif; font-size: 10pt;"><ix:nonNumeric name="dei:EntityEmergingGrowthCompany" id="Fact_b21c2d0135584edc8f18087c679b1a10" contextRef="c20210527to20210527" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
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    <td style="width: 94.24%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Emerging growth company</div>
          </td>

  </tr>

  <tr>

    <td style="width: 5.76%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

    <td style="width: 94.24%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>
          </td>

  </tr>

  <tr>

    <td style="width: 5.76%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Segoe UI Symbol', sans-serif; font-size: 10pt;">&#9744;</div>
          </td>

    <td style="width: 94.24%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">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 accounting standards provided pursuant to Section 13(a) of the Exchange Act.</div>
          </td>

  </tr>


</table>
    <div><br />
    </div>

    <div><br />
    </div>

    <div><br />
    </div>

    <div style="margin-top: 3pt; margin-bottom: 3pt;"><br />
    </div>

    <div style="text-align: left; margin-top: 3pt; margin-bottom: 3pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">&#160;</div>

    <div style="text-align: left; margin-top: 3pt; margin-bottom: 3pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><br />
      <span style="font-size: 10pt; font-family: 'Times New Roman', Times, serif;"><br />
      </span>&#160;</div>

    <div style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
      <div style="page-break-after: always;">
        <hr style="background-color: #ffffff; border-width: 0px; clear: both; color: #ffffff; height: 0px; margin: 4px 0px; width: 100%;" /></div>

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    <div style="text-align: left; margin-top: 3pt; margin-bottom: 3pt; font-family: Times, serif; font-size: 1pt;">&#160;</div>

    <div style="text-align: left; color: #000000; font-family: 'Times New Roman', Times, serif; font-size: 12pt; font-weight: bold;">Item 4.01<span style="font-size: 12pt; font-family: 'Times New Roman', Times, serif;"><span style="text-decoration: underline;">&#160; Change in Registrant&#8217;s
          Certifying Accountant</span></span></div>

    <div style="text-align: justify; text-indent: 36pt; margin-top: 10.8pt; color: #000000; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">RSM US LLP was previously the principal accountants for Waterstone Financial, Inc. (the
      &#8220;Registrant&#8221;). On May 27, 2021, the firm was dismissed as the Registrant&#8217;s principal accountants. The decision to dismiss RSM US LLP was approved by the Audit Committee of the Registrant.</div>

    <div style="text-align: justify; text-indent: 36pt; margin-top: 12.6pt; color: #000000; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">During the years ended December 31, 2020 and 2019 and the subsequent interim period through May 27,
      2021, there were no: (1) disagreements with RSM US LLP on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures, which disagreements, if not resolved to their satisfaction, would have caused
      them to make reference in connection with their opinion to the subject matter of the disagreement, or (2) reportable events under Item 304(a)(1)(v) of Regulation S-K.</div>

    <div style="text-align: justify; text-indent: 36pt; margin-top: 14.4pt; color: #000000; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">The audit reports of RSM US LLP on the consolidated financial statements of the Registrant as of and
      for the years ended December 31, 2020 and 2019 did not contain an adverse opinion or a disclaimer of opinion, and were not qualified or modified as to uncertainty, audit scope or accounting principles.</div>

    <div style="text-align: justify; margin-left: 36pt; margin-top: 14.4pt; color: #000000; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">A letter from RSM US LLP is attached as an Exhibit to this Report on Form 8-K.</div>

    <div style="text-align: justify; text-indent: 36pt; margin-top: 9pt; color: #000000; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">On June 2, 2021, the Registrant engaged CliftonLarsonAllen LLP as the Registrant&#8217;s new principal
      accountants for the year ending December 31, 2021. The engagement was approved by the Audit Committee of the Board of Directors of the Registrant. During the years ended December 31, 2020 and 2019, and the subsequent interim period prior to the
      engagement of CliftonLarsonAllen LLP, the Registrant did not consult with CliftonLarsonAllen LLP regarding any of the matters or events set forth in Item 304(a)(2)(i) and (ii) of Regulation S-K.</div>

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    <div style="margin-bottom: 3pt; margin-top: 3pt; font-weight: bold; color: #000000;">Item 9.01. Financial Statements and Exhibits.</div>

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    <div style="margin-bottom: 3pt; margin-top: 3pt; color: #000000;"><span style="text-decoration: underline;"> Exhibit No.</span>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span style="text-decoration: underline;">Decscription</span><br />
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    <a href="exhibit16.htm">16&#160;</a>&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;<a href="exhibit16.htm"> Letter regarding change in certifying accountant</a>
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    <div style="text-align: center; margin-top: 3pt; margin-bottom: 3pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">SIGNATURES</div>

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    <div style="text-align: left; margin-top: 3pt; margin-bottom: 3pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be
      signed on its behalf by the undersigned hereunto duly authorized.</div>

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            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-style: italic;">/s/ William F. Bruss</div>
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM
8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported):
May 27, 2021
Waterstone Financial, Inc.
(Exact name of Registrant as specified in its charter)
Maryland
(State or Other Jurisdiction
of Incorporation)
001-36271
(Commission File Number)
90-1026709
(I.R.S. Employer Identification No.)
11200 West Plank Ct
,
Wauwatosa
,
Wisconsin
53226
(Address of principal executive offices)
(
414
)
761-1000
Registrant's telephone number, including area code
Not Applicable
(Former Name or former address, if changed since last report)
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading
Symbol
Name of each exchange on which registered
Common Stock, $0.01 Par Value
WSBF
The NASDAQ Stock Market LLC
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the
              following provisions:
☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act
(17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act
(17 CFR 240.13e-4(c))
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or
      Rule 12b-2 of the Securities and Exchange Act of 1934 (§240.12b-2 of this chapter).
☐
Emerging growth company
☐
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 accounting standards provided pursuant to Section 13(a) of the Exchange Act.
Item 4.01
Change in Registrant's
          Certifying Accountant
RSM US LLP was previously the principal accountants for Waterstone Financial, Inc. (the
      "Registrant"). On May 27, 2021, the firm was dismissed as the Registrant's principal accountants. The decision to dismiss RSM US LLP was approved by the Audit Committee of the Registrant.
During the years ended December 31, 2020 and 2019 and the subsequent interim period through May 27,
      2021, there were no: (1) disagreements with RSM US LLP on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures, which disagreements, if not resolved to their satisfaction, would have caused
      them to make reference in connection with their opinion to the subject matter of the disagreement, or (2) reportable events under Item 304(a)(1)(v) of Regulation S-K.
The audit reports of RSM US LLP on the consolidated financial statements of the Registrant as of and
      for the years ended December 31, 2020 and 2019 did not contain an adverse opinion or a disclaimer of opinion, and were not qualified or modified as to uncertainty, audit scope or accounting principles.
A letter from RSM US LLP is attached as an Exhibit to this Report on Form 8-K.
On June 2, 2021, the Registrant engaged CliftonLarsonAllen LLP as the Registrant's new principal
      accountants for the year ending December 31, 2021. The engagement was approved by the Audit Committee of the Board of Directors of the Registrant. During the years ended December 31, 2020 and 2019, and the subsequent interim period prior to the
      engagement of CliftonLarsonAllen LLP, the Registrant did not consult with CliftonLarsonAllen LLP regarding any of the matters or events set forth in Item 304(a)(2)(i) and (ii) of Regulation S-K.
Item 9.01. Financial Statements and Exhibits.
(d) Exhibits
Exhibit No.
Decscription
16
Letter regarding change in certifying accountant
- 2 -
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be
      signed on its behalf by the undersigned hereunto duly authorized.
Waterstone Financial, Inc.
Date:  June 2, 2021
/s/ William F. Bruss
Name: William F. Bruss
Title: Chief Operating Officer and General Counsel
- 3 -