<?xml version='1.0' encoding='UTF-8'?>

      <!-- iXBRL document created with: Toppan Merrill Bridge iXBRL 9.6.7401.38943 -->
      <!-- Based on: iXBRL 1.1 -->
      <!-- Created on: 4/15/2020 11:22:48 AM -->
      <!-- iXBRL Library version: 1.0.7401.38955 -->
      <!-- iXBRL Service Job ID: 4c36a510-5f89-4d76-ba2a-1361dec820d2 -->

  <html xmlns:dei="http://xbrl.sec.gov/dei/2019-01-31" xmlns="http://www.w3.org/1999/xhtml" xmlns:tse="http://trinseo.com/20200415" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xmlns:ixt-sec="http://www.sec.gov/inlineXBRL/transformation/2015-08-31" xmlns:ixt="http://www.xbrl.org/inlineXBRL/transformation/2015-02-26" xmlns:ix="http://www.xbrl.org/2013/inlineXBRL" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrli="http://www.xbrl.org/2003/instance"><head><meta http-equiv="content-type" content="text/html" /><title></title></head><body><div style="margin-top:30pt;"></div><div style="display:none;"><ix:header><ix:hidden><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:EntityCentralIndexKey" id="Tc_mT19Qn6Kok-3shATH6qqWQ_2_1">0001519061</ix:nonNumeric><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:AmendmentFlag" id="Tc_WieDImpHN0GbBS43tCRAcg_3_1">false</ix:nonNumeric><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:EntityTaxIdentificationNumber" id="Hidden_NkSYNKD_bUWWIyhkU0373w">00-0000000</ix:nonNumeric></ix:hidden><ix:references><link:schemaRef xlink:href="tse-20200415.xsd" xlink:type="simple"></link:schemaRef></ix:references><ix:resources><xbrli:context id="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0001519061</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2020-04-15</xbrli:startDate><xbrli:endDate>2020-04-15</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div><div style="max-width:100%;padding-left:5.88%;padding-right:5.88%;position:relative;"><div style="clear:both;max-width:100%;position:relative;min-height:11.5pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;padding-bottom:1pt;padding-top:1pt;border-bottom:1.0pt solid #000000;border-top:3.0pt solid #000000;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="font-weight:bold;visibility:hidden;">&#8203;</span></p><a id="_c0244c5b_da2e_4289_bd19_046990b3d751"></a><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-size:18pt;font-weight:bold;">UNITED STATES</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-size:18pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;">Washington, D.C. 20549</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><div style="background-color:#ffffff;font-family:'Times New Roman';font-size:10.0pt;margin-bottom:0pt;min-height:1.19em;position:relative;width:100%;"><div style="background-color:#000000;height:1pt;position:relative;top:0.6em;width:25.0%;border:none;margin:0 auto;"></div></div><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:18pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;">FORM&#160;</b><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:DocumentType" id="Narr_qdMrLAYOkkiddOeTG8BeRg"><b style="font-weight:bold;">8-K</b></ix:nonNumeric></p><div style="background-color:#ffffff;font-family:'Times New Roman';font-size:10.0pt;margin-bottom:0pt;min-height:1.19em;position:relative;width:100%;"><div style="background-color:#000000;height:1pt;position:relative;top:0.6em;width:25.0%;border:none;margin:0 auto;"></div></div><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-size:12pt;font-weight:bold;">CURRENT REPORT</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-size:12pt;font-weight:bold;">Pursuant to Section&#160;13 or 15(d)</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-size:12pt;font-weight:bold;">of The Securities Exchange Act of 1934</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="background-color:#ffff00;font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">Date of Report (Date of earliest event reported):<b style="font-weight:bold;"> </b><b style="font-weight:bold;">April 15, 2020</b><span style="font-size:8pt;"> </span><b style="font-weight:bold;">(</b><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt:datemonthdayyearen" name="dei:DocumentPeriodEndDate" id="Narr_GPkFWVK7gES7eLDzGE5NxA"><b style="font-weight:bold;">April 10, 2020</b></ix:nonNumeric><b style="font-weight:bold;">)</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><div style="background-color:#ffffff;font-family:'Times New Roman';font-size:10.0pt;margin-bottom:0pt;min-height:1.19em;position:relative;width:100%;"><div style="background-color:#000000;height:1pt;position:relative;top:0.6em;width:25.0%;border:none;margin:0 auto;"></div></div><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:18pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:EntityRegistrantName" id="Narr_6y4dv3zCvECibeAkKDzwiw"><b style="font-weight:bold;">Trinseo S.A.</b></ix:nonNumeric></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(Exact name of registrant as specified in its charter)</p><div style="background-color:#ffffff;font-family:'Times New Roman';font-size:10.0pt;margin-bottom:0pt;min-height:1.19em;position:relative;width:100%;"><div style="background-color:#000000;height:1pt;position:relative;top:0.6em;width:25.0%;border:none;margin:0 auto;"></div></div><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><a id="_c7076d27_0600_49a5_956e_97b2dcb62696"></a><a id="Tc_E-Ef4Sqq9kWYCR_AiZXaIA_2_0"></a><a id="Tc_lBXf3Hhp6UWm0g8mCEHWsA_2_2"></a><a id="Tc_GtIJhOkwBU6q0D8IgbrYjQ_2_4"></a><table style="border-collapse:collapse;font-size:16pt;margin-left:auto;margin-right:auto;padding-left:0pt;padding-right:0pt;width:100%;"><tr style="height:1pt;"><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:2%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:bottom;width:2%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td></tr><tr><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt-sec:edgarprovcountryen" name="dei:EntityIncorporationStateCountryCode" id="Tc_W_8L8wvqtUejymjOrVG0hQ_1_0"><b style="font-weight:bold;">Luxembourg</b></ix:nonNumeric></p></td><td style="vertical-align:bottom;width:2%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:EntityFileNumber" id="Tc_BRYmiDsszE6CJdRzILJnYw_1_2"><b style="font-weight:bold;">001-36473</b></ix:nonNumeric></p></td><td style="vertical-align:bottom;width:2%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="-sec-ix-hidden:Hidden_NkSYNKD_bUWWIyhkU0373w"><b style="color:#000000;font-family:'Times New Roman';font-size:10pt;font-style:normal;font-weight:bold;line-height:1.19;text-align:center;">N/A</b></span></p></td></tr><tr><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(State or other jurisdiction<br />of incorporation or organization)</p></td><td style="vertical-align:bottom;width:2%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(Commission<br />File Number)</p></td><td style="vertical-align:bottom;width:2%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:32%;margin:0pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(I.R.S. Employer<br />Identification Number)</p></td></tr></table><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:EntityAddressAddressLine1" id="Narr_nOmZ2hb94UGWVk1Kqp9wRA"><b style="font-weight:bold;">1000 Chesterbrook Boulevard</b></ix:nonNumeric><b style="font-weight:bold;">, </b><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:EntityAddressAddressLine2" id="Narr_SkaxHkA1DkmAXx2mhjMf1g"><b style="font-weight:bold;">Suite&#160;300</b></ix:nonNumeric><b style="font-weight:bold;">,</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:EntityAddressCityOrTown" id="Narr_ok3m-MNG6E2OAOZRbSoZ4A"><b style="font-weight:bold;">Berwyn</b></ix:nonNumeric><b style="font-weight:bold;">, </b><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt-sec:stateprovnameen" name="dei:EntityAddressStateOrProvince" id="Narr_6mKSnEt1aEGF5feMtirrJA"><b style="font-weight:bold;">Pennsylvania</b></ix:nonNumeric><b style="font-weight:bold;"> </b><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:EntityAddressPostalZipCode" id="Narr_AZtkV9SsuU2S-5kvFwkPaw"><b style="font-weight:bold;">19312</b></ix:nonNumeric></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(Address of principal executive offices, including zip code)</p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;">(</b><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:CityAreaCode" id="Narr_9DP8HU17gUSsLono-kUNjw"><b style="font-weight:bold;">610</b></ix:nonNumeric><b style="font-weight:bold;">) </b><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:LocalPhoneNumber" id="Narr_REaid8xYVUOxIL34D7MzCQ"><b style="font-weight:bold;">240-3200</b></ix:nonNumeric></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">(Telephone number, including area code)</p><div style="background-color:#ffffff;font-family:'Times New Roman';font-size:10.0pt;margin-bottom:0pt;min-height:1.19em;position:relative;width:100%;"><div style="background-color:#000000;height:1pt;position:relative;top:0.6em;width:25.0%;border:none;margin:0 auto;"></div></div><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">Check the appropriate box below if the Form&#160;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. below):</p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><table style="border-collapse:collapse;border:0;"><tr><td style="vertical-align:text-top;white-space:nowrap;width:24.5pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin-bottom:0pt;margin-top:0pt;padding-bottom:6pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt-sec:boolballotbox" name="dei:WrittenCommunications" id="Narr_--WAAfC_3keha3ur1daXzA"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric></p></td><td style="padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin-bottom:0pt;margin-top:0pt;padding-bottom:6pt;">Written communications pursuant to Rule&#160;425 under the Securities Act (17 CFR 230.425)</p></td></tr></table><table style="border-collapse:collapse;border:0;"><tr><td style="vertical-align:text-top;white-space:nowrap;width:24.5pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin-bottom:0pt;margin-top:0pt;padding-bottom:6pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt-sec:boolballotbox" name="dei:SolicitingMaterial" id="Narr_tjkLuwd5O0iOPJtVgXRDNQ"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric></p></td><td style="padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin-bottom:0pt;margin-top:0pt;padding-bottom:6pt;">Soliciting material pursuant to Rule&#160;14a-12 under the Exchange Act (17 CFR 240.14a-12)</p></td></tr></table><table style="border-collapse:collapse;border:0;"><tr><td style="vertical-align:text-top;white-space:nowrap;width:24.5pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin-bottom:0pt;margin-top:0pt;padding-bottom:6pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt-sec:boolballotbox" name="dei:PreCommencementTenderOffer" id="Narr_wBR5v8W0vEeg4e34k9pEcw"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric></p></td><td style="padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin-bottom:0pt;margin-top:0pt;padding-bottom:6pt;">Pre-commencement communications pursuant to Rule&#160;14d-2(b)&#160;under the Exchange Act (17 CFR 240.14d-2(b))</p></td></tr></table><table style="border-collapse:collapse;border:0;"><tr><td style="vertical-align:text-top;white-space:nowrap;width:24.5pt;padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin-bottom:0pt;margin-top:0pt;padding-bottom:12pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt-sec:boolballotbox" name="dei:PreCommencementIssuerTenderOffer" id="Narr_cCkntN-8oUKNWo6t2HlslA"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric></p></td><td style="padding:0pt;"><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin-bottom:0pt;margin-top:0pt;padding-bottom:12pt;">Pre-commencement communications pursuant to Rule&#160;13e-4(c)&#160;under the Exchange Act (17 CFR 240.13e-4(c))</p></td></tr></table><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule&#160;405 of the Securities Act of 1933 (&#167;230.405 of this chapter) or Rule&#160;12b-2 of the Securities Exchange Act of 1934 (&#167;240.12b-2 of this chapter).</p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">Emerging growth company <ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt-sec:boolballotbox" name="dei:EntityEmergingGrowthCompany" id="Narr_XFAHJOrVW02IqCf8jc7imQ"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;padding-bottom:6pt;margin:0pt;">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)&#160;of the Exchange Act. <span style="font-family:'Segoe UI Symbol';">&#9744;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt 0pt 6pt 0pt;">Securities registered pursuant to Section 12(b) of the Act:</p><a id="_44be8218_0215_4675_aa98_5b460d437c96"></a><a id="Tc_T9TLmB-UjUCDLPPGBT9ryg_1_0"></a><a id="Tc_nLExOFyQBke2tH1DAitPDw_1_1"></a><a id="Tc_K6YFz2NWlUazMN2CCGObvA_1_2"></a><table style="border-collapse:collapse;font-size:16pt;margin-left:auto;margin-right:auto;width:100%;"><tr style="height:1pt;"><td style="vertical-align:top;width:33.31%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;font-weight:bold;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:33.34%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;font-weight:bold;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:33.34%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;font-weight:bold;visibility:hidden;">&#8203;</span></p></div></div></td></tr><tr><td style="vertical-align:top;width:33.31%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:8pt;line-height:1.37;text-align:center;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">Title of Each Class</b></p></td><td style="vertical-align:top;width:33.34%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:8pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">Trading symbol(s)</b></p></td><td style="vertical-align:top;width:33.34%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:8pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">Name of Each Exchange on which registered</b></p></td></tr><tr><td style="vertical-align:top;width:33.31%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:Security12bTitle" id="Tc_rPQve3m89kegdqRbZK3Z9w_2_0"><b style="font-size:9pt;font-weight:bold;">Ordinary Shares, par value $0.01 per share</b></ix:nonNumeric></p></td><td style="vertical-align:top;width:33.34%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" name="dei:TradingSymbol" id="Tc_JFTVV_7ywUyTuMoTXv07OA_2_1"><b style="font-size:9pt;font-weight:bold;">TSE</b></ix:nonNumeric></p></td><td style="vertical-align:top;width:33.34%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_4_15_2020_To_4_15_2020_OB09U1owFEqXy-TUKtrFbQ" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="Tc_46TNJeqOS0-xFia4yfIJJg_2_2"><b style="font-size:9pt;font-weight:bold;">New York Stock Exchange</b></ix:nonNumeric></p></td></tr></table><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:10pt;line-height:1.19;padding-bottom:1pt;padding-top:1pt;border-bottom:3.0pt solid #000000;border-top:1.0pt solid #000000;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><a id="_488160ea_9ec9_4dd1_82a9_b9710cba48dd"></a></div></div>
<div style="background-color:#000000;clear:both;height:2pt;page-break-after:always;width:88.24%;border:0;margin:30pt 5.88% 30pt 5.88%;"></div><div style="max-width:100%;padding-left:5.88%;padding-right:5.88%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;">ITEM 5.02&#160;  Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.</b></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;white-space:pre-wrap;">(b)  Departure of Directors or Certain Officers</b></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><i style="font-style:italic;">Retirement Announcement from Mr. Zide and Mr. Pappas</i></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">On April 15, 2020, two directors of Trinseo S.A. (the &#8220;Company&#8221;), Stephen M. Zide and Christopher D. Pappas, notified the Company of their decisions to retire from the Company&#8217;s Board of Directors (the &#8220;Board&#8221;) and not serve past the Company&#8217;s 2021 annual general meeting of shareholders. Mr. Zide and Mr. Pappas have been nominated for election to the Board at the Company&#8217;s upcoming 2020 annual general meeting of shareholders and if reelected will continue to serve as the Company&#8217;s directors. The decision by Mr. Zide and Mr. Pappas to retire as directors of the Company was not the result of any disagreement with the Company on any matter relating to the operations, internal controls, policies or practices of the Company.</p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">Mr. Zide has served on the Board since 2010, leading the Company through its initial public offering in 2014. Mr. Pappas served as the Company&#8217;s President and Chief Executive Officer since 2010 until his retirement in 2019, and has been a member of the Board since 2010. As the Board&#8217;s longest-tenured members, Mr. Zide and Mr. Pappas have been important contributors to the successful transition of Frank Bozich into the role of Chief Executive Officer of the Company, and to the initial onboarding of the Board&#8217;s two newest directors. Anticipating that the current volatile market environment will stabilize, and the orientation of new directors will be complete before the 2021 annual general meeting, Mr. Zide and Mr. Pappas believed it was appropriate to announce their decisions to retire from the Board and not serve past the Company&#8217;s 2021 annual general meeting. In light of Mr. Zide&#8217;s and Mr. Pappas&#8217; decisions, the Board has begun a new search for director candidates.</p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">The Company and the Board are grateful to Mr. Zide and Mr. Pappas for their years of dedication and service to the Company.</p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><i style="font-style:italic;">Termination of Executive Officer</i></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">On April 15, 2020, the Company announced that Timothy Stedman, Senior Vice President, Corporate Development, has been named Special Advisor effective May 1, 2020 in connection with a reorganization of the Company&#8217;s management team, and will leave the Company on October 31, 2020. A copy of the Company&#8217;s press release announcing the management reorganization is filed as Exhibit 99.1 hereto and is incorporated herein by reference. The Company thanks Mr. Stedman for his contributions to the business.</p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;white-space:pre-wrap;">(e)  Compensatory Arrangements of Certain Officers</b></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">In connection with his termination, Mr. Stedman entered into a separation agreement with the Company&#8217;s subsidiary, Trinseo Europe GmbH, on April 10, 2020, pursuant to which he will receive a severance amount equal to 1.5 multiplied by the sum of his base salary and target cash bonus, paid in equal monthly installments for a period of eighteen (18) months after Mr. Stedman&#8217;s final date of employment.</p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">Mr. Stedman will also receive continued health and welfare benefits as provided in his employment contract or required by local law. The foregoing summary of the agreement with Mr. Stedman is supplemented and qualified in all respects by reference to the full terms of the agreement, which is filed as Exhibit 10.1 hereto and is incorporated herein by reference.</p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;white-space:pre-wrap;">ITEM 9.01  Financial Statements and Exhibits.</b></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;">(d) Exhibits</b></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><table style="border-collapse:collapse;font-size:16pt;margin-left:auto;margin-right:auto;padding-left:0pt;padding-right:0pt;width:100%;"><tr><td style="vertical-align:bottom;width:12.12%;border-bottom:1.0pt solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:8pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;">Exhibit<br />Number</b></p></td><td style="vertical-align:bottom;width:2.65%;border-bottom:1.0pt solid transparent;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:8pt;line-height:1.19;margin:0pt;">&#160;&#160;&#160;&#160;</p></td><td style="vertical-align:bottom;width:85.22%;border-bottom:1.0pt solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:8pt;line-height:1.19;text-align:center;margin:0pt;"><b style="font-weight:bold;">Description</b></p></td></tr><tr><td style="vertical-align:top;width:12.12%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">10.1</p></td><td style="vertical-align:bottom;width:2.65%;margin:0pt;padding:0pt;"></td><td style="vertical-align:top;width:85.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><a href="tse-20200410xex10d1.htm"><span style="font-family:'Times New Roman';font-size:10pt;font-style:normal;font-weight:normal;line-height:1.19;text-align:left;">Separation Agreement between Timothy Stedman and Trinseo Europe GmbH, dated April 10, 2020</span></a></p></td></tr><tr><td style="vertical-align:top;width:12.12%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">99.1</p></td><td style="vertical-align:bottom;width:2.65%;margin:0pt;padding:0pt;"></td><td style="vertical-align:top;width:85.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><a href="tse-20200410xex99d1.htm"><span style="font-family:'Times New Roman';font-size:10pt;font-style:normal;font-weight:normal;line-height:1.19;text-align:left;">P</span><span style="font-family:'Times New Roman';font-size:10pt;font-style:normal;font-weight:normal;line-height:1.19;text-align:left;">ress</span><span style="font-family:'Times New Roman';font-size:10pt;font-style:normal;font-weight:normal;line-height:1.19;text-align:left;"> </span><span style="font-family:'Times New Roman';font-size:10pt;font-style:normal;font-weight:normal;line-height:1.19;text-align:left;">Release dated April 15, 2020</span></a></p></td></tr><tr><td style="vertical-align:top;width:12.12%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;">104</p></td><td style="vertical-align:bottom;width:2.65%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:85.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)</p></td></tr></table><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.37;margin:0pt 0pt 10pt 0pt;"><span style="line-height:1.19;margin-bottom:0pt;visibility:hidden;">&#8203;</span></p><a id="_6ced7468_daa7_4f8e_834e_7551e273c2f8"></a></div></div>
<div style="background-color:#000000;clear:both;height:2pt;page-break-after:always;width:88.24%;border:0;margin:30pt 5.88% 30pt 5.88%;"></div><div style="max-width:100%;padding-left:5.88%;padding-right:5.88%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt 0pt 6pt 0pt;"><b style="font-weight:bold;">SIGNATURE</b></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-indent:36pt;margin:0pt;">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.</p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><table style="border-collapse:collapse;font-size:16pt;margin-left:auto;margin-right:auto;padding-left:0pt;padding-right:0pt;width:100%;"><tr><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"></td><td colspan="2" style="vertical-align:bottom;width:48.58%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><b style="font-weight:bold;">TRINSEO S.A.</b></p></td></tr><tr><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:7.72%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:40.86%;margin:0pt;padding:0pt;"></td></tr><tr><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:7.72%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:40.86%;margin:0pt;padding:0pt;"></td></tr><tr><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:7.72%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">By:</p></td><td style="vertical-align:bottom;width:40.86%;border-bottom:1.0pt solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">/s/ Angelo N. Chaclas</p></td></tr><tr><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:7.72%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">Name:</p></td><td style="vertical-align:bottom;width:40.86%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">Angelo N. Chaclas</p></td></tr><tr><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"></td><td style="vertical-align:top;width:7.72%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">Title:</p></td><td style="vertical-align:bottom;width:40.86%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;">Senior Vice President, Chief Legal Officer,<br />Chief Compliance Officer &amp; Corporate Secretary</p></td></tr><tr style="height:14.85pt;"><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:7.72%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:40.86%;margin:0pt;padding:0pt;"></td></tr><tr><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="white-space:pre-wrap;">Date:  April 15, 2020</span></p></td><td style="vertical-align:bottom;width:7.72%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:40.86%;margin:0pt;padding:0pt;"></td></tr><tr><td style="vertical-align:bottom;width:51.41%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:7.72%;margin:0pt;padding:0pt;"></td><td style="vertical-align:bottom;width:40.86%;margin:0pt;padding:0pt;"></td></tr></table><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.19;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:10pt;line-height:1.37;margin:0pt 0pt 10pt 0pt;"><span style="line-height:1.19;margin-bottom:0pt;visibility:hidden;">&#8203;</span></p></div></div>
<div style="background-color:#000000;clear:both;height:2pt;margin-left:5.88%;margin-right:5.88%;margin-top:30pt;page-break-after:avoid;width:88.24%;border:0;"></div></body></html>
[{"type": "8-K", "sequence": "1", "filename": "tse-20200415x8k.htm", "description": "8-K", "secsgml_size_bytes": 42108}]
{"company-data": {"conformed-name": "Trinseo S.A.", "cik": "0001519061", "assigned-sic": "2821", "irs-number": "000000000", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-36473", "film-number": "20792596"}, "business-address": {"street1": "1000 CHESTERBROOK BOULEVARD", "street2": "SUITE 3000", "city": "BERWYN", "state": "PA", "zip": "19312", "phone": "610-240-3200"}, "mail-address": {"street1": "1000 CHESTERBROOK BOULEVARD", "street2": "SUITE 3000", "city": "BERWYN", "state": "PA", "zip": "19312"}, "former-company": {"former-conformed-name": "Bain Capital Everest (Luxco 2) S.a r.l.", "date-changed": "20110426"}}
​
​
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):
April 15, 2020
(
April 10, 2020
)
​
Trinseo S.A.
(Exact name of registrant as specified in its charter)
​
​
​
​
​
​
Luxembourg
​
001-36473
​
N/A
(State or other jurisdiction
of incorporation or organization)
​
(Commission
File Number)
​
(I.R.S. Employer
Identification Number)
​
1000 Chesterbrook Boulevard
,
Suite 300
,
Berwyn
,
Pennsylvania
19312
(Address of principal executive offices, including zip code)
​
(
610
)
240-3200
(Telephone number, including area code)
​
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. below):
​
☐
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 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.
☐
Securities registered pursuant to Section 12(b) of the Act:
​
​
​
Title of Each Class
Trading symbol(s)
Name of Each Exchange on which registered
Ordinary Shares, par value $0.01 per share
TSE
New York Stock Exchange
​
​
​
ITEM 5.02   Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.
​
(b)  Departure of Directors or Certain Officers
​
Retirement Announcement from Mr. Zide and Mr. Pappas
​
On April 15, 2020, two directors of Trinseo S.A. (the "Company"), Stephen M. Zide and Christopher D. Pappas, notified the Company of their decisions to retire from the Company's Board of Directors (the "Board") and not serve past the Company's 2021 annual general meeting of shareholders. Mr. Zide and Mr. Pappas have been nominated for election to the Board at the Company's upcoming 2020 annual general meeting of shareholders and if reelected will continue to serve as the Company's directors. The decision by Mr. Zide and Mr. Pappas to retire as directors of the Company was not the result of any disagreement with the Company on any matter relating to the operations, internal controls, policies or practices of the Company.
​
Mr. Zide has served on the Board since 2010, leading the Company through its initial public offering in 2014. Mr. Pappas served as the Company's President and Chief Executive Officer since 2010 until his retirement in 2019, and has been a member of the Board since 2010. As the Board's longest-tenured members, Mr. Zide and Mr. Pappas have been important contributors to the successful transition of Frank Bozich into the role of Chief Executive Officer of the Company, and to the initial onboarding of the Board's two newest directors. Anticipating that the current volatile market environment will stabilize, and the orientation of new directors will be complete before the 2021 annual general meeting, Mr. Zide and Mr. Pappas believed it was appropriate to announce their decisions to retire from the Board and not serve past the Company's 2021 annual general meeting. In light of Mr. Zide's and Mr. Pappas' decisions, the Board has begun a new search for director candidates.
​
The Company and the Board are grateful to Mr. Zide and Mr. Pappas for their years of dedication and service to the Company.
​
Termination of Executive Officer
​
On April 15, 2020, the Company announced that Timothy Stedman, Senior Vice President, Corporate Development, has been named Special Advisor effective May 1, 2020 in connection with a reorganization of the Company's management team, and will leave the Company on October 31, 2020. A copy of the Company's press release announcing the management reorganization is filed as Exhibit 99.1 hereto and is incorporated herein by reference. The Company thanks Mr. Stedman for his contributions to the business.
​
(e)  Compensatory Arrangements of Certain Officers
​
In connection with his termination, Mr. Stedman entered into a separation agreement with the Company's subsidiary, Trinseo Europe GmbH, on April 10, 2020, pursuant to which he will receive a severance amount equal to 1.5 multiplied by the sum of his base salary and target cash bonus, paid in equal monthly installments for a period of eighteen (18) months after Mr. Stedman's final date of employment.
​
Mr. Stedman will also receive continued health and welfare benefits as provided in his employment contract or required by local law. The foregoing summary of the agreement with Mr. Stedman is supplemented and qualified in all respects by reference to the full terms of the agreement, which is filed as Exhibit 10.1 hereto and is incorporated herein by reference.
​
ITEM 9.01  Financial Statements and Exhibits.
​
(d) Exhibits
​
Exhibit
Number
Description
10.1
Separation Agreement between Timothy Stedman and Trinseo Europe GmbH, dated April 10, 2020
99.1
P
ress
Release dated April 15, 2020
104
​
Cover Page Interactive Data File (formatted in Inline XBRL and contained in Exhibit 101)
​
​
​
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.
​
​
TRINSEO S.A.
By:
/s/ Angelo N. Chaclas
Name:
Angelo N. Chaclas
Title:
Senior Vice President, Chief Legal Officer,
Chief Compliance Officer & Corporate Secretary
Date:  April 15, 2020
​
​
​