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

    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">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.&#160;&#160; 20549</div>

    <div style="text-align: center; margin-top: 18pt; margin-bottom: 12pt; font-family: 'Times New Roman', Times, serif; font-size: 14pt; font-weight: bold;">FORM <ix:nonNumeric name="dei:DocumentType" id="Fact_1d15fdb3796d48a6a15dbd4819f09a58" contextRef="c20210520to20210520">8-K</ix:nonNumeric></div>

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

    <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">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 the earliest event reported)</div>

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    <div style="text-align: center; margin-bottom: 18pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(Exact name of registrant as specified in its charter)</div>

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    <td style="width: 33.33%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(Commission</div>
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            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(IRS Employer</div>
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">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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    <td style="width: 33.08%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(Zip Code)</div>
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    <div style="text-align: center; margin-top: 12pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Registrant&#8217;s telephone number, including area code</div>

    <div style="text-align: center; margin-bottom: 12pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">(<ix:nonNumeric name="dei:CityAreaCode" id="Fact_203f72b169c3464dad450a89482252be" contextRef="c20210520to20210520">972</ix:nonNumeric>)
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    <td style="width: 23.68%; vertical-align: top;">&#160;</td>

    <td style="width: 52.63%; vertical-align: top; border-bottom: #000000 2px solid;">&#160;</td>

    <td style="width: 23.68%; vertical-align: top;">&#160;</td>

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    <td style="width: 23.68%; vertical-align: top;">&#160;</td>

    <td style="width: 52.63%; vertical-align: top;">
            <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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    <td style="width: 23.68%; vertical-align: top;">&#160;</td>

  </tr>


</table>
    <div style="text-align: left; margin-top: 18pt; margin-bottom: 12pt; 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 (see General Instruction A.2):</div>

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    <td style="width: 6.77%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 14pt;"><ix:nonNumeric name="dei:WrittenCommunications" id="Fact_ebbd101306004e3f8863077c0159d167" contextRef="c20210520to20210520" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
            </div>
          </td>

    <td style="width: 93.23%; vertical-align: middle;">
            <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: 6.77%; vertical-align: top;">&#160;</td>

    <td style="width: 93.23%; vertical-align: middle;">&#160;</td>

  </tr>

  <tr>

    <td style="width: 6.77%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 14pt;"><ix:nonNumeric name="dei:SolicitingMaterial" id="Fact_9ee7a013b3384fd4a583564259da7a53" contextRef="c20210520to20210520" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
            </div>
          </td>

    <td style="width: 93.23%; vertical-align: middle;">
            <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: 6.77%; vertical-align: top;">&#160;</td>

    <td style="width: 93.23%; vertical-align: middle;">&#160;</td>

  </tr>

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    <td style="width: 6.77%; vertical-align: top;">
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            </div>
          </td>

    <td style="width: 93.23%; vertical-align: middle;">
            <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 (17 CFR 240.14d-2(b))</div>
          </td>

  </tr>

  <tr>

    <td style="width: 6.77%; vertical-align: top;">&#160;</td>

    <td style="width: 93.23%; vertical-align: middle;">&#160;</td>

  </tr>

  <tr>

    <td style="width: 6.77%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 14pt;"><ix:nonNumeric name="dei:PreCommencementIssuerTenderOffer" id="Fact_65f473a1cd6748428060cef6ac8f3e90" contextRef="c20210520to20210520" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric><br />
            </div>
          </td>

    <td style="width: 93.23%; vertical-align: middle;">
            <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 (17 CFR 240.13e-4(c))</div>
          </td>

  </tr>


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

    <div><br />
    </div>

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    <td style="width: 38%; vertical-align: bottom; border-bottom: #000000 2px solid;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 8pt; font-weight: bold;">Title of each class</div>
          </td>

    <td style="width: 1%; vertical-align: bottom;">&#160;</td>

    <td style="width: 15%; vertical-align: bottom; border-bottom: #000000 2px solid;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 8pt; font-weight: bold;">Trading</div>
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 8pt; font-weight: bold;">Symbol(s)</div>
          </td>

    <td style="width: 1%; vertical-align: bottom;">&#160;</td>

    <td style="width: 45%; vertical-align: bottom; border-bottom: #000000 2px solid;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 8pt; font-weight: bold;">Name of each exchange on which registered</div>
          </td>

  </tr>

  <tr>

    <td style="width: 38%; vertical-align: top;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 8pt;"><ix:nonNumeric name="dei:Security12bTitle" id="Fact_be0846463d964988b7789cbd69a8ebc9" contextRef="c20210520to20210520">Common stock</ix:nonNumeric><br />
            </div>
          </td>

    <td style="width: 1%; vertical-align: bottom;">&#160;</td>

    <td style="width: 15%; vertical-align: bottom;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 8pt;"><ix:nonNumeric name="dei:TradingSymbol" id="Fact_839a5265550b4517a4c6189d3dc47c73" contextRef="c20210520to20210520">NL</ix:nonNumeric><br />
            </div>
          </td>

    <td style="width: 1%; vertical-align: bottom;">&#160;</td>

    <td style="width: 45%; vertical-align: bottom;">
            <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 8pt;"><ix:nonNumeric name="dei:SecurityExchangeName" id="Fact_369d900ee3f04e6b89c19589fa34eb79" contextRef="c20210520to20210520" format="ixt-sec:exchnameen">New York Stock Exchange</ix:nonNumeric><br />
            </div>
          </td>

  </tr>


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

      <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 (17&#160;CFR &#167;230.405) or Rule
        12b-2 of the Securities Exchange Act of 1934 (17 CFR &#167;240.12b-2).</div>

    </div>

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

      <div style="text-align: right; margin-top: 6pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Emerging growth company&#160; <ix:nonNumeric name="dei:EntityEmergingGrowthCompany" id="Fact_725fb1c758864a8d910659e77f85c0a0" contextRef="c20210520to20210520" format="ixt-sec:boolballotbox">&#x2610;</ix:nonNumeric></div>

    </div>

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

      <div style="text-align: left; margin-top: 6pt; 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&#160;13(a) of the Exchange Act.&#160;&#160;<span style="font-size: 10pt; font-family: 'Times New Roman', Times, serif;">&#9744;</span></div>

    </div>

    <div style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
      <div style="page-break-after:always;">
        <hr style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;" /></div>

    </div>

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

    </div>

    <div><br />
    </div>

    <div><br />
    </div>

    <div><br />
    </div>

    <div><br />
    </div>

    <div><br />
    </div>

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  <tr>

    <td style="width: 72pt; vertical-align: top; align: right; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Item 5.07</td>

    <td style="width: auto; vertical-align: top; text-align: left;">
            <div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Submission of Matters to a Vote of Security Holders.</div>
          </td>

  </tr>


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

    <div style="text-align: left; text-indent: 36pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">The registrant held its 2021 annual meeting of shareholders on May 20, 2021.&#160; At the 2021 annual meeting, the registrant&#8217;s shareholders
      voted on the two proposals described in detail in the registrant&#8217;s definitive proxy statement on Schedule 14A filed with the U.S. Securities and Exchange Commission on March 31, 2021.&#160; Shareholders present at the 2021 annual meeting, either in person
      or by proxy, represented 94.01% of the 48,788,984 shares eligible to vote at the meeting.</div>

    <div><br />
    </div>

    <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-variant: small-caps;">Proposal 1:&#160; Election of Director<span style="font-size: 10pt; font-family: 'Times New Roman', Times, serif; font-style: italic;">s</span></div>

    <div><br />
    </div>

    <div style="text-align: left; text-indent: 36pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">The registrant&#8217;s shareholders elected Ms. Loretta J. Feehan, Mr. Robert D. Graham, Mr. John E. Harper, Ms. Meredith W. Mendes, Mr. Cecil H.
      Moore, Jr. and Gen. Thomas P. Stafford (ret.) as directors.&#160; Each director nominee received votes &#8220;For&#8221; his or her election from at least 86.86% of the shares eligible to vote at the annual meeting.</div>

    <div><br />
    </div>

    <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-variant: small-caps;">Proposal 2:&#160; Say-on-Pay, Nonbinding Advisory Vote Approving Executive Compensation</div>

    <div><br />
    </div>

    <div style="text-align: left; text-indent: 36pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">The registrant&#8217;s shareholders adopted a resolution, on a nonbinding advisory basis, approving <span style="font-size: 10pt; font-family: 'Times New Roman', Times, serif;">the compensation of the registrant&#8217;s named executive officers as described in the registrant&#8217;s 2021 proxy statement.&#160; The resolution received the approval from 85.74 of the shares eligible to vote at the annual
        meeting.</span></div>

    <div><br />
    </div>

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  <tr>

    <td style="width: 72pt; vertical-align: top; align: right; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Item 7.01</td>

    <td style="width: auto; vertical-align: top; text-align: left;">
            <div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Regulation FD Disclosure.</div>
          </td>

  </tr>


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

    <div style="text-align: left; text-indent: 36pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">The registrant also hereby furnishes the information set forth in its press releases issued on May 20, 2021, a copy of which is attached as
      Exhibit 99.1 and incorporated herein by reference.&#160; The information the registrant furnishes in this report under this Item 7.01, and the exhibit in Item 9.01, is not deemed &#8220;filed&#8221; for purposes of section 18 of the Securities Exchange Act of 1934,
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            <div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Financial Statements and Exhibits.</div>
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              <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Item No.</div>
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              <div style="text-align: center; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">Exhibit Index</div>
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            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">99.1</div>
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    <td style="width: 71.62%; vertical-align: top;">
            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;"><a href="exh991.htm">Press release dated May 20, 2021
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            <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Cover Page Interactive Data File (embedded within the Inline XBRL document)</div>
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      <div style="text-align: left; text-indent: 36pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-weight: bold;">SIGNATURE</div>

      <div><br />
      </div>

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      </div>

      <div style="text-align: left; text-indent: 36pt; 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-variant: small-caps; font-weight: bold;">NL INDUSTRIES, INC.</div>
            </td>

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              <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">(Registrant)</div>
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              <div style="text-align: left; font-family: 'Times New Roman', Times, serif; font-size: 10pt;">Date:&#160; May 20, 2021</div>
            </td>

    <td style="width: 52.24%; vertical-align: top;">
              <div style="text-align: left;"><span style="font-size: 10pt; font-family: 'Times New Roman', Times, serif;">By:</span>&#160;&#160;&#160;&#160;&#160;&#160;&#160; <span style="text-decoration: underline;"><span style="font-size: 10pt; font-family: 'Times New Roman', Times, serif;"><span style="font-size: 10pt; font-family: 'Times New Roman', Times, serif;">/s/ Clarence B. Brown, III</span><span style="display: inline-block; text-indent: 0px; font-size: 1px; width: 12pt">&#160;</span></span></span></div>
              <div style="text-align: left; text-indent: 36pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-style: italic;">Clarence B. Brown, III,</div>
              <div style="text-align: left; text-indent: 36pt; font-family: 'Times New Roman', Times, serif; font-size: 10pt; font-style: italic;">Vice President and Secretary</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 the earliest event reported)
May 20, 2021
NL Industries, Inc.
(Exact name of registrant as specified in its charter)
New Jersey
1-640
13-5267260
(State or other jurisdiction of incorporation)
(Commission
File Number)
(IRS Employer
Identification No.)
5430 LBJ Freeway
,
Suite 1700
,
Dallas
,
Texas
75240-2620
(Address of principal executive offices)
(Zip Code)
Registrant's telephone number, including area code
(
972
)
233-1700
(Former name or former address, if changed since last report.)
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 (see General Instruction A.2):
☐
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))
Securities registered pursuant to Section 12(b) of the Act:
Title of each class
Trading
Symbol(s)
Name of each exchange on which registered
Common stock
NL
New York Stock Exchange
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule
        12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).
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 5.07
Submission of Matters to a Vote of Security Holders.
The registrant held its 2021 annual meeting of shareholders on May 20, 2021.  At the 2021 annual meeting, the registrant's shareholders
      voted on the two proposals described in detail in the registrant's definitive proxy statement on Schedule 14A filed with the U.S. Securities and Exchange Commission on March 31, 2021.  Shareholders present at the 2021 annual meeting, either in person
      or by proxy, represented 94.01% of the 48,788,984 shares eligible to vote at the meeting.
Proposal 1:  Election of Director
s
The registrant's shareholders elected Ms. Loretta J. Feehan, Mr. Robert D. Graham, Mr. John E. Harper, Ms. Meredith W. Mendes, Mr. Cecil H.
      Moore, Jr. and Gen. Thomas P. Stafford (ret.) as directors.  Each director nominee received votes "For" his or her election from at least 86.86% of the shares eligible to vote at the annual meeting.
Proposal 2:  Say-on-Pay, Nonbinding Advisory Vote Approving Executive Compensation
The registrant's shareholders adopted a resolution, on a nonbinding advisory basis, approving
the compensation of the registrant's named executive officers as described in the registrant's 2021 proxy statement.  The resolution received the approval from 85.74 of the shares eligible to vote at the annual
        meeting.
Item 7.01
Regulation FD Disclosure.
The registrant also hereby furnishes the information set forth in its press releases issued on May 20, 2021, a copy of which is attached as
      Exhibit 99.1 and incorporated herein by reference.  The information the registrant furnishes in this report under this Item 7.01, and the exhibit in Item 9.01, is not deemed "filed" for purposes of section 18 of the Securities Exchange Act of 1934,
      as amended, or otherwise subject to the liabilities of that section.  Registration statements or other documents filed with the U.S. Securities and Exchange Commission shall not incorporate this information by reference, except as otherwise expressly
      stated in such filing.
Item 9.01
Financial Statements and Exhibits.
(d)
Exhibits
Item No.
Exhibit Index
99.1
Press release dated May 20, 2021
                issued by the registrant
.
104
Cover Page Interactive Data File (embedded within the Inline XBRL document)
SIGNATURE
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.
NL INDUSTRIES, INC.
(Registrant)
Date:  May 20, 2021
By:
/s/ Clarence B. Brown, III
Clarence B. Brown, III,
Vice President and Secretary