<?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: 6/18/2020 12:15:15 PM -->
      <!-- iXBRL Library version: 1.0.7401.38955 -->
      <!-- iXBRL Service Job ID: a77788e1-1d81-4874-abc5-d774c5379563 -->

  <html xmlns:dei="http://xbrl.sec.gov/dei/2019-01-31" xmlns="http://www.w3.org/1999/xhtml" xmlns:imgn="http://www.immunogen.com/20200618" 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_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:EntityCentralIndexKey" id="Tc_EeZf4RbhAESuwU_b-oAUvQ_2_1">0000855654</ix:nonNumeric><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:AmendmentFlag" id="Tc_CaP-z0UaSk2N3nKM34nbpA_3_1">false</ix:nonNumeric></ix:hidden><ix:references><link:schemaRef xlink:href="imgn-20200618.xsd" xlink:type="simple"></link:schemaRef></ix:references><ix:resources><xbrli:context id="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g"><xbrli:entity><xbrli:identifier scheme="http://www.sec.gov/CIK">0000855654</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2020-06-17</xbrli:startDate><xbrli:endDate>2020-06-17</xbrli:endDate></xbrli:period></xbrli:context></ix:resources></ix:header></div><div style="max-width:100%;padding-left:10.35%;padding-right:10.35%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><a id="_2b3dc912_5bc3_48f5_b5ac_b1478520123e"></a><p style="font-family:'Times New Roman';font-size:14pt;font-weight:bold;text-align:center;margin:0pt;">UNITED STATES</p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-size:14pt;font-weight:bold;">SECURITIES AND EXCHANGE COMMISSION</b></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">Washington, D.C. 20549</b></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:18pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">FORM </b><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:DocumentType" id="Narr_9TQORg9JAEyf9HUGXzLVTA"><b style="font-weight:bold;">8-K</b></ix:nonNumeric></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">CURRENT REPORT</b></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">PURSUANT TO SECTION 13 OR 15(d)</b></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">OF THE SECURITIES EXCHANGE ACT OF 1934</b></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">Date of Report (Date of earliest event reported): <ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" format="ixt:datemonthdayyearen" name="dei:DocumentPeriodEndDate" id="Narr_Ytbhv2Ri-0iHF0U3pl2FEA">June 17, 2020</ix:nonNumeric></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="font-size:8pt;font-weight:bold;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:24pt;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:EntityRegistrantName" id="Narr_pioNWJzRxUONAZRbUmk6wQ"><b style="font-weight:bold;">ImmunoGen, Inc.</b></ix:nonNumeric></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">(Exact name of registrant as specified in its charter)</p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><a id="_2b3f9c18_ffce_45ab_af8e_c5ead214879e"></a><a id="Tc_1lZZ5tC1u0yibYpO8pyhCA_2_1"></a><a id="Tc_aIagUB-OhUu2lyNlY_cTfg_2_2"></a><a id="Tc_6gXYZudgp0m4eO3rf4vM4g_2_3"></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:0.22%;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:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:38.37%;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:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:36.57%;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:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:24.62%;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:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:0.19%;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:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td></tr><tr><td style="vertical-align:top;width:0.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="font-weight:bold;text-decoration:underline;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:38.37%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" format="ixt-sec:stateprovnameen" name="dei:EntityIncorporationStateCountryCode" id="Tc_FmyWpooWZ0qzxoci-x4Rsg_1_1"><b style="font-weight:bold;">Massachusetts</b></ix:nonNumeric></p></td><td style="vertical-align:top;width:36.57%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:EntityFileNumber" id="Tc_qW7sBFhwbk2PB7ot3LxcUQ_1_2"><b style="font-weight:bold;">0-17999</b></ix:nonNumeric></p></td><td style="vertical-align:top;width:24.62%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:EntityTaxIdentificationNumber" id="Tc_QoCiXfAxQEWLUAnW4NHNgg_1_3"><b style="font-weight:bold;">04-2726691</b></ix:nonNumeric></p></td><td style="vertical-align:top;width:0.19%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="font-weight:bold;text-decoration:underline;visibility:hidden;">&#8203;</span></p></td></tr><tr style="height:27.9pt;"><td style="vertical-align:top;width:0.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:38.37%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">(State or other jurisdiction of<br />incorporation)</p></td><td style="vertical-align:top;width:36.57%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">(Commission File Number)</p></td><td style="vertical-align:top;width:24.62%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">(IRS Employer<br />Identification No.)</p></td><td style="vertical-align:top;width:0.19%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr></table><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:EntityAddressAddressLine1" id="Narr_p6y56q2aKE6YuCrXa7YReQ"><b style="font-weight:bold;">830 Winter Street</b></ix:nonNumeric><b style="font-weight:bold;">, </b><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:EntityAddressCityOrTown" id="Narr_RhvXJO-vnEyH4LMPc_r_rQ"><b style="font-weight:bold;">Waltham</b></ix:nonNumeric><b style="font-weight:bold;">, </b><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:EntityAddressStateOrProvince" id="Narr_M2nuu4c1PkqzL3U1kt38pQ"><b style="font-weight:bold;">MA</b></ix:nonNumeric><b style="font-weight:bold;"> </b><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:EntityAddressPostalZipCode" id="Narr_HR4jAyAcpEqXdjZdhNQZ5A"><b style="font-weight:bold;">02451</b></ix:nonNumeric></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="white-space:pre-wrap;">(Address of principal executive offices)   (Zip Code)</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">Registrant&#39;s telephone number, including area code: (<ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:CityAreaCode" id="Narr_7xTOGTDsrUusn2Qol0JD5Q">781</ix:nonNumeric>) <ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:LocalPhoneNumber" id="Narr_Z0XvGde4n0qC5ItB56q5cw">895-0600</ix:nonNumeric></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;">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 (<i style="font-style:italic;">see </i>General Instruction A.2. below):</p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;text-indent:18pt;margin:0pt 0pt 3pt 0pt;"><span style="display:inline-block;text-align:left;text-indent:0pt;width:18pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" format="ixt-sec:boolballotbox" name="dei:WrittenCommunications" id="Narr_c_VCdCs5Akyqfb-nKeN64A"><span style="color:#000000;font-family:'Segoe UI Symbol';font-size:12pt;font-style:normal;font-weight:normal;text-align:justify;">&#9744;</span></ix:nonNumeric></span>Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;text-indent:18pt;margin:0pt 0pt 3pt 0pt;"><span style="display:inline-block;text-align:left;text-indent:0pt;width:18pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" format="ixt-sec:boolballotbox" name="dei:SolicitingMaterial" id="Narr_h5US4RuyWkC1PfRF3dVu7w"><span style="color:#000000;font-family:'Segoe UI Symbol';font-size:12pt;font-style:normal;font-weight:normal;text-align:justify;">&#9744;</span></ix:nonNumeric></span>Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)</p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;text-indent:18pt;margin:0pt 0pt 3pt 0pt;"><span style="display:inline-block;text-align:left;text-indent:0pt;width:18pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" format="ixt-sec:boolballotbox" name="dei:PreCommencementTenderOffer" id="Narr_-MoQdeutB02x1OSNCRYMhQ"><span style="color:#000000;font-family:'Segoe UI Symbol';font-size:12pt;font-style:normal;font-weight:normal;text-align:justify;">&#9744;</span></ix:nonNumeric></span>Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))</p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;text-indent:18pt;margin:0pt;"><span style="display:inline-block;text-align:left;text-indent:0pt;width:18pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" format="ixt-sec:boolballotbox" name="dei:PreCommencementIssuerTenderOffer" id="Narr_yJRSQMJohEmZEnls5MSMow"><span style="color:#000000;font-family:'Segoe UI Symbol';font-size:12pt;font-style:normal;font-weight:normal;text-align:justify;">&#9744;</span></ix:nonNumeric></span>Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;text-indent:18pt;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><b style="font-weight:bold;">Securities registered pursuant to Section 12(b) of the Act:</b></p><a id="_e8d4466d_05d3_45ef_aa67_7e80b3b179f0"></a><a id="Tc_YwSrlCGgkUmQTemzvSLpIg_1_1"></a><a id="Tc_m8inMORp_k-CmlbXhPo-MA_1_3"></a><a id="Tc_Sc4WfHKhjU2IFyNr-zbRbw_1_5"></a><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:top;width:0.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:32.49%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:2.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:16.34%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:2.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:45.77%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:0.19%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:top;width:0.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="font-weight:bold;text-decoration:underline;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:bottom;width:32.49%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">Title of Each Class</b></p></td><td style="vertical-align:top;width:2.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">&#160;&#160;&#160;&#160;</b></p></td><td style="vertical-align:bottom;width:16.34%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">Trading Symbol</b></p></td><td style="vertical-align:top;width:2.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">&#160;&#160;&#160;&#160;</b></p></td><td style="vertical-align:bottom;width:45.77%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">Name of Each Exchange on Which Registered</b></p></td><td style="vertical-align:top;width:0.19%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="font-weight:bold;text-decoration:underline;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:top;width:0.22%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:32.49%;border-top:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:Security12bTitle" id="Tc_C_UB4xSR7Eq23ETaa5KIew_2_1">Common Stock, $.01 par value</ix:nonNumeric></p></td><td style="vertical-align:top;width:2.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:16.34%;border-top:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" name="dei:TradingSymbol" id="Tc_ZdD8Pizsv0uyj4DMcJYGxQ_2_3">IMGN</ix:nonNumeric></p></td><td style="vertical-align:top;width:2.48%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:45.77%;border-top:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" format="ixt-sec:exchnameen" name="dei:SecurityExchangeName" id="Tc_ck21lUWP6EKlYk_lbvQXaQ_2_5">Nasdaq Global Select Market</ix:nonNumeric></p></td><td style="vertical-align:top;width:0.19%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr></table><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;text-indent:18pt;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;">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 Exchange Act of 1934 (&#167;240.12b-2) of this chapter.</p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:right;margin:0pt;">Emerging growth company <ix:nonNumeric contextRef="Duration_6_17_2020_To_6_17_2020_3Gq5PTkRzk-OYMDusgx96g" format="ixt-sec:boolballotbox" name="dei:EntityEmergingGrowthCompany" id="Narr_gj9cnO4h-kuhVz4rCN92Gg"><span style="font-family:'Segoe UI Symbol';">&#9744;</span></ix:nonNumeric></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-size:8pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;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 13(a) of the Exchange Act. <span style="font-family:'Segoe UI Symbol';">&#9744;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p><p style="display:none;font-size:12pt;line-height:0pt;text-align:justify;margin:0pt;"><span style="font-family:'Times New Roman';font-size:0pt;font-weight:bold;letter-spacing:-0.15pt;visibility:hidden;">&#8203;</span></p></div></div>
<div style="background-color:#000000;clear:both;height:2pt;page-break-after:always;width:79.3%;border:0;margin:30pt 10.35% 30pt 10.35%;"></div><div style="max-width:100%;padding-left:10.35%;padding-right:10.35%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><b style="font-weight:bold;">ITEM 5.07. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS</b></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="white-space:pre-wrap;">At the 2020 annual meeting of shareholders of ImmunoGen, Inc. held on June 17, 2020 (the &#8220;2020 Annual Meeting&#8221;), shareholders fixed the number of Directors constituting the full Board of Directors at seven.  The voting results were as follows:</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:36pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">For:</span></span><span style="display:inline-block;width:36pt;"></span><span style="display:inline-block;width:36pt;"></span>146,268,797</p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:72pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">Against:</span></span><span style="display:inline-block;width:36pt;"></span><span style="white-space:pre-wrap;">       840,871</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:72pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">Abstain:</span></span><span style="display:inline-block;width:36pt;"></span><span style="white-space:pre-wrap;">       158,685</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Broker Non-Votes<span style="display:inline-block;width:19.02pt;"></span><span style="white-space:pre-wrap;">                  0</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">At the 2020 Annual Meeting, shareholders elected seven Directors as follows:</p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><div style="margin-left:0pt;"><table style="border-collapse:collapse;font-size:16pt;table-layout:auto;width:106.63%;"><tr style="height:1pt;"><td style="vertical-align:top;width:19.19%;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:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:middle;width:17.32%;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:50%;transform:translate(0,-50%);width:100%;"></div></div></td><td style="vertical-align:middle;width:15.65%;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:50%;transform:translate(0,-50%);width:100%;"></div></div></td><td style="vertical-align:top;width:20.86%;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:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:middle;width:26.95%;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:50%;transform:translate(0,-50%);width:100%;"></div></div></td></tr><tr><td style="vertical-align:top;width:19.19%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:middle;width:17.32%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">FOR</b></p></td><td style="vertical-align:middle;width:15.65%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">WITHHELD</b></p></td><td style="vertical-align:middle;width:20.86%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">BROKER NON-VOTES</b></p></td><td style="vertical-align:middle;width:26.95%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="font-weight:bold;text-decoration:underline;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:middle;width:19.19%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Stephen C. McCluski</p></td><td style="vertical-align:middle;width:17.32%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">114,501,125</p></td><td style="vertical-align:middle;width:15.65%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">2,736,606</p></td><td style="vertical-align:middle;width:20.86%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 43.2pt 0pt 0pt;">30,030,622</p></td><td style="vertical-align:middle;width:26.95%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt 43.2pt 0pt 0pt;"><span style="margin-right:0pt;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:middle;width:19.19%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Richard J. Wallace</p></td><td style="vertical-align:middle;width:17.32%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">113,338,788</p></td><td style="vertical-align:middle;width:15.65%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">3,898,943</p></td><td style="vertical-align:middle;width:20.86%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 43.2pt 0pt 0pt;">30,030,622</p></td><td style="vertical-align:middle;width:26.95%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt 43.2pt 0pt 0pt;"><span style="margin-right:0pt;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:middle;width:19.19%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Mark Goldberg, MD</p></td><td style="vertical-align:middle;width:17.32%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">114,586,898</p></td><td style="vertical-align:middle;width:15.65%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">2,650,833</p></td><td style="vertical-align:middle;width:20.86%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 43.2pt 0pt 0pt;">30,030,622</p></td><td style="vertical-align:middle;width:26.95%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt 43.2pt 0pt 0pt;"><span style="margin-right:0pt;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:middle;width:19.19%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Dean J. Mitchell</p></td><td style="vertical-align:middle;width:17.32%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">116,212,650</p></td><td style="vertical-align:middle;width:15.65%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">1,025,081</p></td><td style="vertical-align:middle;width:20.86%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 43.2pt 0pt 0pt;">30,030,622</p></td><td style="vertical-align:middle;width:26.95%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt 43.2pt 0pt 0pt;"><span style="margin-right:0pt;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:middle;width:19.19%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Kristine Peterson</p></td><td style="vertical-align:middle;width:17.32%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">64,422,928</p></td><td style="vertical-align:middle;width:15.65%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">52,814,803</p></td><td style="vertical-align:middle;width:20.86%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 43.2pt 0pt 0pt;">30,030,622</p></td><td style="vertical-align:middle;width:26.95%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt 43.2pt 0pt 0pt;"><span style="margin-right:0pt;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:middle;width:19.19%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Mark J. Enyedy</p></td><td style="vertical-align:middle;width:17.32%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">115,767,197</p></td><td style="vertical-align:middle;width:15.65%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">1,470,534</p></td><td style="vertical-align:middle;width:20.86%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 43.2pt 0pt 0pt;">30,030,622</p></td><td style="vertical-align:middle;width:26.95%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt 43.2pt 0pt 0pt;"><span style="margin-right:0pt;visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:middle;width:19.19%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Stuart A. Arbuckle</p></td><td style="vertical-align:middle;width:17.32%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">116,007,719</p></td><td style="vertical-align:middle;width:15.65%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 14.4pt 0pt 0pt;">1,230,012</p></td><td style="vertical-align:middle;width:20.86%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt 43.2pt 0pt 0pt;">30,030,622</p></td><td style="vertical-align:middle;width:26.95%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt 43.2pt 0pt 0pt;"><span style="margin-right:0pt;visibility:hidden;">&#8203;</span></p></td></tr></table></div><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">At the 2020 Annual Meeting, shareholders voted to approve an amendment to our <br /><span style="white-space:pre-wrap;">Restated Articles of Organization to increase the number of authorized shares of our common stock from 200,000,000 to 300,000,000.  The voting results were as follows:</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:36pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">For:</span></span><span style="display:inline-block;width:36pt;"></span><span style="display:inline-block;width:36pt;"></span>141,196,724</p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:72pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">Against:</span></span><span style="display:inline-block;width:36pt;"></span><span style="white-space:pre-wrap;">    5,115,903</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:72pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">Abstain:</span></span><span style="display:inline-block;width:36pt;"></span><span style="white-space:pre-wrap;">       955,726</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Broker Non-Votes<span style="display:inline-block;width:19.02pt;"></span><span style="white-space:pre-wrap;">                  0</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">At the 2020 Annual Meeting, shareholders voted, on an advisory basis, to approve the compensation paid to our named executive officers, as described in our proxy statement (referred to as the &#8220;say-on-pay vote&#8221;) as follows:</p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:36pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">For:</span></span><span style="display:inline-block;width:36pt;"></span><span style="display:inline-block;width:36pt;"></span><span style="white-space:pre-wrap;">  113,647,949</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:72pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">Against:</span></span><span style="display:inline-block;width:36pt;"></span><span style="white-space:pre-wrap;">      3,166,870</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="display:inline-block;text-indent:0pt;width:72pt;"><span style="color:#000000;font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">Abstain:</span></span><span style="display:inline-block;width:36pt;"></span><span style="white-space:pre-wrap;">         422,912</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Broker Non-Votes:<span style="display:inline-block;width:15.69pt;"></span><span style="white-space:pre-wrap;">    30,030,622</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></div></div>
<div style="background-color:#000000;clear:both;height:2pt;page-break-after:always;width:79.3%;border:0;margin:30pt 10.35% 30pt 10.35%;"></div><div style="max-width:100%;padding-left:10.35%;padding-right:10.35%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><b style="font-weight:bold;">ITEM 8.01. OTHER EVENTS</b></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="background-color:#ffffff;">On June 17, 2020, the Board of Directors approved amendments to the Company&#8217;s Compensation Policy for Non-Employee&#160;Directors (as so amended, the &#8220;Director Compensation Policy&#8221;) effective as of June 17, 2020. A copy of the Director Compensation Policy is being filed with this Current Report on&#160;Form&#160;8-K&#160;as&#160;Exhibit 10.1 and is incorporated into this Item 8.01 by reference</span> </p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="font-weight:bold;visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:12pt;margin:6pt 0pt 0pt 0pt;"><b style="font-weight:bold;">ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS</b></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:12pt;padding-top:6pt;margin:0pt;"><span style="font-size:10pt;font-style:italic;visibility:hidden;">&#8203;</span></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:12pt;padding-top:6pt;margin:0pt;"><i style="font-style:italic;">(d) Exhibits</i></p><p style="background-color:#ffffff;font-family:'Times New Roman';font-size:12pt;margin:0pt;">&#160;</p><table style="background-color:#ffffff;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:middle;width:12.27%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:50%;transform:translate(0,-50%);width:100%;"></div></div></td><td style="vertical-align:bottom;width:6%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="bottom:0pt;position:absolute;width:100%;"></div></div></td><td style="vertical-align:middle;width:81.72%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:50%;transform:translate(0,-50%);width:100%;"></div></div></td></tr><tr><td style="background-color:#ffffff;vertical-align:middle;width:12.27%;margin:0pt;padding:0pt;"></td><td style="background-color:#ffffff;vertical-align:bottom;width:6%;margin:0pt;padding:0pt;"></td><td style="background-color:#ffffff;vertical-align:middle;width:81.72%;margin:0pt;padding:0pt;"></td></tr><tr><td style="background-color:#ffffff;vertical-align:bottom;white-space:nowrap;width:12.27%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;border-bottom:1.0pt solid #000000;margin:0pt;"><b style="font-weight:bold;">Exhibit&#160;No.</b></p></td><td style="background-color:#ffffff;vertical-align:bottom;width:6%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">&#160;&#160;</p></td><td style="background-color:#ffffff;vertical-align:bottom;white-space:nowrap;width:81.72%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;border-bottom:1.0pt solid #000000;margin:0pt;"><b style="font-weight:bold;">Description</b></p></td></tr><tr style="height:4pt;"><td style="background-color:#ffffff;vertical-align:middle;width:12.27%;margin:0pt;padding:0pt;"></td><td colspan="2" style="background-color:#ffffff;vertical-align:middle;width:87.72%;margin:0pt;padding:0pt;"></td></tr><tr><td style="background-color:#ffffff;vertical-align:top;white-space:nowrap;width:12.27%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">10.1</p></td><td style="background-color:#ffffff;vertical-align:bottom;width:6%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">&#160;&#160;</p></td><td style="background-color:#ffffff;vertical-align:top;width:81.72%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><a href="imgn-20200617xex10d1.htm"><span style="font-family:'Times New Roman';font-size:12pt;font-style:normal;font-weight:normal;text-align:left;">Compensation Policy for Non-Employee Directors, as amended through June 17, 2020</span></a><span style="text-decoration:underline;text-decoration-color:#000000;"> </span></p></td></tr><tr><td style="background-color:#ffffff;vertical-align:top;white-space:nowrap;width:12.27%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="background-color:#ffffff;vertical-align:bottom;width:6%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="background-color:#ffffff;vertical-align:top;width:81.72%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="background-color:#ffffff;vertical-align:top;white-space:nowrap;width:12.27%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">104</p></td><td style="background-color:#ffffff;vertical-align:bottom;width:6%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="background-color:#ffffff;vertical-align:top;width:81.72%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;">Cover Page Interactive Data File (embedded within the Inline XBRL (eXtensible Business Reporting Language) document)</p></td></tr></table><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-weight:bold;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">SIGNATURES</b></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="font-size:11pt;visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;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:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><table style="border-collapse:collapse;font-size:16pt;padding-left:0pt;padding-right:0pt;width:100%;"><tr style="height:1pt;"><td style="vertical-align:top;width:43.28%;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:12pt;margin:0pt;"><span style="font-size:1pt;visibility:hidden;">&#8203;</span></p></div></div></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"></div></div></td></tr><tr><td style="vertical-align:top;width:43.28%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="font-weight:bold;text-decoration:underline;visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><b style="font-weight:bold;text-decoration:underline;text-decoration-color:#000000;">ImmunoGen, Inc. </b></p></td></tr><tr><td style="vertical-align:top;width:43.28%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;">(Registrant) </p></td></tr><tr><td style="vertical-align:top;width:43.28%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:top;width:43.28%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;">Date: June 18, 2020</p></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="text-decoration:underline;text-decoration-color:#000000;">/s/ David G. Foster </span></p></td></tr><tr><td style="vertical-align:top;width:43.28%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:center;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr><tr><td style="vertical-align:top;width:43.28%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;">David G. Foster</p></td></tr><tr><td style="vertical-align:top;width:43.28%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;">Vice President, Finance</p></td></tr><tr><td style="vertical-align:top;width:43.28%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td><td style="vertical-align:top;width:56.71%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman';font-size:12pt;text-align:justify;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></td></tr></table><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p><p style="font-family:'Times New Roman';font-size:12pt;margin:0pt;"><span style="visibility:hidden;">&#8203;</span></p></div></div>
<div style="background-color:#000000;clear:both;height:2pt;margin-left:10.35%;margin-right:10.35%;margin-top:30pt;page-break-after:avoid;width:79.3%;border:0;"></div></body></html>
[{"type": "8-K", "sequence": "1", "filename": "imgn-20200618x8k.htm", "description": "8-K", "secsgml_size_bytes": 52340}]
{"company-data": {"conformed-name": "ImmunoGen, Inc.", "cik": "0000855654", "assigned-sic": "2834", "irs-number": "042726691", "state-of-incorporation": "MA", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-17999", "film-number": "20971278"}, "business-address": {"street1": "830 WINTER ST", "city": "WALTHAM", "state": "MA", "zip": "02451", "phone": "(781)895-0600"}, "mail-address": {"street1": "830 WINTER ST", "city": "WALTHAM", "state": "MA", "zip": "02451"}, "former-company": {"former-conformed-name": "IMMUNOGEN INC", "date-changed": "19920703"}}
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):
June 17, 2020
​
ImmunoGen, Inc.
(Exact name of registrant as specified in its charter)
​
​
​
​
​
​
​
Massachusetts
0-17999
04-2726691
​
​
(State or other jurisdiction of
incorporation)
(Commission File Number)
(IRS Employer
Identification No.)
​
830 Winter Street
,
Waltham
,
MA
02451
(Address of principal executive offices)   (Zip Code)
​
Registrant's telephone number, including area code: (
781
)
895-0600
​
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))
​
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, $.01 par value
​
IMGN
​
Nasdaq Global Select Market
​
​
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.
☐
​
ITEM 5.07. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
​
At the 2020 annual meeting of shareholders of ImmunoGen, Inc. held on June 17, 2020 (the "2020 Annual Meeting"), shareholders fixed the number of Directors constituting the full Board of Directors at seven.  The voting results were as follows:
​
For:
146,268,797
Against:
840,871
Abstain:
158,685
Broker Non-Votes
0
​
At the 2020 Annual Meeting, shareholders elected seven Directors as follows:
​
​
​
​
FOR
WITHHELD
BROKER NON-VOTES
​
Stephen C. McCluski
114,501,125
2,736,606
30,030,622
​
Richard J. Wallace
113,338,788
3,898,943
30,030,622
​
Mark Goldberg, MD
114,586,898
2,650,833
30,030,622
​
Dean J. Mitchell
116,212,650
1,025,081
30,030,622
​
Kristine Peterson
64,422,928
52,814,803
30,030,622
​
Mark J. Enyedy
115,767,197
1,470,534
30,030,622
​
Stuart A. Arbuckle
116,007,719
1,230,012
30,030,622
​
​
At the 2020 Annual Meeting, shareholders voted to approve an amendment to our
Restated Articles of Organization to increase the number of authorized shares of our common stock from 200,000,000 to 300,000,000.  The voting results were as follows:
​
For:
141,196,724
Against:
5,115,903
Abstain:
955,726
Broker Non-Votes
0
​
​
At the 2020 Annual Meeting, shareholders voted, on an advisory basis, to approve the compensation paid to our named executive officers, as described in our proxy statement (referred to as the "say-on-pay vote") as follows:
​
For:
113,647,949
Against:
3,166,870
Abstain:
422,912
Broker Non-Votes:
30,030,622
​
​
ITEM 8.01. OTHER EVENTS
​
On June 17, 2020, the Board of Directors approved amendments to the Company's Compensation Policy for Non-Employee Directors (as so amended, the "Director Compensation Policy") effective as of June 17, 2020. A copy of the Director Compensation Policy is being filed with this Current Report on Form 8-K as Exhibit 10.1 and is incorporated into this Item 8.01 by reference
​
ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS
​
(d) Exhibits
Exhibit No.
Description
10.1
Compensation Policy for Non-Employee Directors, as amended through June 17, 2020
​
​
​
104
​
Cover Page Interactive Data File (embedded within the Inline XBRL (eXtensible Business Reporting Language) document)
​
​
​
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.
​
​
​
​
ImmunoGen, Inc.
​
(Registrant)
​
​
Date: June 18, 2020
/s/ David G. Foster
​
​
​
David G. Foster
​
Vice President, Finance
​
​
​
​