<!--Enhanced HTML document created with Toppan Merrill Bridge  9.10.0.88--><!--Created on: 5/14/2021 08:16:54 PM (UTC)--><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta charset="UTF-8"><title></title></head><body><div style="margin-top:30pt;"></div><div style="max-width:100%;padding-left:10.83%;padding-right:10.83%;position:relative;"><div style="margin-top:30pt;width:100%;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:right;margin:0pt;"><font style="font-weight:bold;visibility:hidden;">&#8203;</font></p></div><div style="clear:both;max-width:100%;position:relative;"><p style="font-family:'Times New Roman','Times','serif';font-size:1pt;border-bottom:1.0pt solid #000000;border-top:2.25pt solid #000000;margin:0pt 0pt 3pt 0pt;">&#160;</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><b style="font-size:14pt;font-weight:bold;">UNITED STATES </b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;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','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><b style="font-size:14pt;font-weight:bold;">Washington, D.C. 20549 </b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><font style="font-size:12pt;font-weight:bold;visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><b style="font-size:18pt;font-weight:bold;">FORM 8-K</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><font style="font-size:12pt;font-weight:bold;visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;">CURRENT REPORT</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">Pursuant to Section&#160;13 or 15 (d)&#160;of The Securities Exchange Act of 1934</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><font style="font-weight:bold;visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;">Date of Report (Date of earliest event reported): May 13, 2021</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><b style="font-size:22pt;font-weight:bold;">CAPSTONE GREEN ENERGY CORPORATION</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;">(Exact name of registrant as specified in its charter)</p><div align="right"><table style="border-collapse:collapse;font-size:16pt;height:max-content;margin-left:auto;padding-left:0pt;padding-right:0pt;table-layout:auto;width:100%;"><tr style="height:1pt;"><td style="vertical-align:bottom;width:33.78%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td style="vertical-align:bottom;width:2.81%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td style="vertical-align:bottom;width:25.33%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td colspan="2" style="vertical-align:bottom;width:4.69%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td colspan="2" style="vertical-align:bottom;width:33.36%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td></tr><tr><td style="vertical-align:bottom;width:33.78%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">&#160;</p></td><td style="vertical-align:bottom;width:2.81%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">&#160;</p></td><td style="vertical-align:bottom;width:25.33%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">&#160;</p></td><td colspan="2" 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style="vertical-align:bottom;width:4.69%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">&#160;</p></td><td colspan="2" style="vertical-align:top;width:33.36%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:9pt;visibility:hidden;">&#8203;</font></p></td></tr><tr style="height:1pt;"><td style="vertical-align:bottom;width:33.78%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td style="vertical-align:bottom;width:2.81%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td colspan="2" style="vertical-align:bottom;width:28.39%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td colspan="2" style="vertical-align:bottom;width:5.02%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td style="vertical-align:bottom;width:29.97%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td></tr><tr><td style="vertical-align:top;width:33.78%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;">16640 Stagg Street,</p></td><td style="vertical-align:bottom;width:2.81%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">&#160;</p></td><td style="vertical-align:bottom;width:25.33%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">&#160;</p></td><td colspan="2" 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style="vertical-align:top;width:4%;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><td style="vertical-align:top;width:92%;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></table></div><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="font-family:'Times New Roman';">&#9723;</font> Written communications pursuant to Rule&#160;425 under the Securities Act (17 CFR 230.425)</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="font-family:'Times New Roman';">&#9723;</font> Soliciting material pursuant to 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style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td style="vertical-align:top;width:32.41%;margin:0pt;padding:0pt 3.59pt 0pt 3.59pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"></div></div></td><td style="vertical-align:top;white-space:nowrap;width:1.06%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;text-decoration:underline;visibility:hidden;">&#8203;</font></p></div></div></td><td style="vertical-align:top;width:32.41%;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:32.98%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">Title of each class</b></p></td><td style="vertical-align:top;width:1.11%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:8pt;visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;width:32.41%;border-bottom:1px solid #000000;margin:0pt;padding:0pt 3.59pt 0pt 3.59pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:8pt;text-align:center;margin:0pt;"><b style="font-weight:bold;">Trading Symbol(s)</b></p></td><td style="vertical-align:top;white-space:nowrap;width:1.06%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font 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style="font-size:8pt;visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;width:32.41%;margin:0pt;padding:0pt 3.59pt 0pt 3.59pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><font style="font-size:8pt;font-weight:bold;visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;white-space:nowrap;width:1.06%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:8pt;font-weight:bold;visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;width:32.41%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><font style="font-size:8pt;font-weight:bold;visibility:hidden;">&#8203;</font></p></td></tr></table></div><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;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 (17 CFR &#167;230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR &#167;240.12b-2).</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">Emerging growth company <font style="font-family:'Times New Roman';">&#9723;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;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. <font style="font-family:'Times New Roman';">&#9723;</font> </p></div></div><hr style="background-color:#000000;clear:both;color:#000000;height:2pt;line-height:0;margin-bottom:30pt;margin-left:10.83%;margin-right:10.83%;margin-top:30pt;page-break-after:always;width:78.35%;border-width:0;"><div style="max-width:100%;padding-left:10.83%;padding-right:10.83%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 11pt 0pt;"><font style="display:inline-block;text-indent:0pt;width:72pt;"><b style="color:#000000;font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:bold;text-align:left;">Item 1.01</b></font><b style="font-weight:bold;">Entry into Material Definitive Agreement.</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><u style="text-decoration:underline;text-decoration-color:#000000;">First Amendment to Amended and Restated Note Purchase Agreement</u></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="text-decoration:underline;visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;text-indent:36pt;margin:0pt;">On May 13, 2021 (the &#8220;Amendment Date&#8221;), Capstone Green Energy Corporation (the &#8220;Company&#8221;), certain subsidiaries of the company (the &#8220;Guarantors&#8221;), the Purchaser party thereto (the &#8220;Purchaser&#8221;) and Goldman Sachs Specialty Lending Group, L.P. (as successor in interest to Goldman Sachs Specialty Lending Holdings, Inc.), as collateral agent (the &#8220;Collateral Agent&#8221;), entered into a First Amendment, dated as of May 13, 2021 (the &#8220;Amendment&#8221;), to the Amended and Restated Note Purchase Agreement, dated as of October 1, 2020 (the &#8220;Closing Date&#8221;), by and among the Company, the Guarantors, the Purchaser and the Collateral Agent (the &#8220;A&amp;R Note Purchase Agreement&#8221;). &#160;The Amendment amends certain provisions of the A&amp;R Note Purchase Agreement, including to (a) require the Company to expand its Rental Fleet (as defined in the A&amp;R Note Purchase Agreement) by (i) at least 2.00 MW by the 9-month anniversary of the Closing Date (instead of 6.25 MW as provided in the A&amp;R Note Purchase Agreement prior to the Amendment), and (ii) at least 12.50 MW by the 18-month anniversary of the Closing Date (which is unchanged from the covenant set forth in in the A&amp;R Note Purchase Agreement prior to the Amendment), and (b) increase the Company&#8217;s minimum consolidated liquidity requirement from $9,000,000 to $12,200,000 for the period from the Amendment Date to March 31, 2022. </p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;text-indent:36pt;margin:0pt;">The foregoing description of the Amendment does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Amendment, which is filed herewith as Exhibit 10.1 to this Current Report and is incorporated by reference herein.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt 0pt 11pt 0pt;"><font style="visibility:hidden;">&#8203;</font></p><table border="0" cellpadding="0" cellspacing="0"><tr><td style="vertical-align:text-top;white-space:nowrap;width:72pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin-bottom:10pt;margin-top:18pt;"><b style="font-weight:bold;">Item 9.01</b></p></td><td style="padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin-bottom:10pt;margin-top:18pt;"><b style="font-weight:bold;">Financial Statements and Exhibits.</b></p></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt 0pt 10pt 0pt;"><b style="font-weight:bold;">(d)&#160;Exhibits.</b></p><div align="left"><table style="border-collapse:collapse;font-size:16pt;height:max-content;width:100%;"><tr style="height:1pt;"><td style="vertical-align:top;width:19.57%;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%;"></div></div></td><td style="vertical-align:top;width:80.42%;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%;"></div></div></td></tr><tr><td style="vertical-align:top;width:19.57%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;padding-bottom:1pt;border-bottom:1px solid #000000;margin:0pt;">Exhibit Number</p></td><td style="vertical-align:top;width:80.42%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;padding-bottom:1pt;border-bottom:1px solid #000000;margin:0pt;">Exhibit Description</p></td></tr><tr style="height:27.45pt;"><td style="vertical-align:top;width:19.57%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">10.1</p></td><td style="vertical-align:top;width:80.42%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><a style="-sec-extract:exhibit;" href="cpst-20210513xex10d1.htm"><font style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;text-align:left;">First Amendment, dated as of May 13, 2021, to the Amended and Restated Note Purchase Agreement, by and among Capstone Green Energy Corporation, certain subsidiaries of the Company and Goldman Sachs Specialty Lending Group, L.P.</font></a></p></td></tr><tr style="height:18pt;"><td style="vertical-align:top;width:19.57%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;width:80.42%;margin:0pt;padding:0pt 5.4pt 0pt 5.4pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p></td></tr></table></div><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p></div></div><hr style="background-color:#000000;clear:both;color:#000000;height:2pt;line-height:0;margin-bottom:30pt;margin-left:10.83%;margin-right:10.83%;margin-top:30pt;page-break-after:always;width:78.35%;border-width:0;"><div style="max-width:100%;padding-left:10.83%;padding-right:10.83%;position:relative;"><div style="clear:both;max-width:100%;position:relative;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-weight:bold;padding-left:36pt;text-align:center;text-indent:-36pt;margin:0pt 0pt 24pt 0pt;">SIGNATURE</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt 0pt 6pt 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','Times','serif';font-size:10pt;text-align:center;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p><div><table style="border-collapse:collapse;font-size:16pt;height:max-content;margin-left:auto;margin-right:auto;padding-left:0pt;padding-right:0pt;width:100%;" align="center"><tr style="height:1pt;"><td style="vertical-align:top;width:49.97%;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><td style="vertical-align:top;width:3.44%;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><td style="vertical-align:top;width:46.57%;margin:0pt;padding:0pt;"><div style="height:1pt;overflow:hidden;overflow-wrap:break-word;position:relative;"><div style="position:absolute;top:0pt;width:100%;"></div></div></td></tr><tr style="height:1pt;"><td style="vertical-align:top;width:49.97%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td><td colspan="2" style="vertical-align:top;width:50.02%;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','Times','serif';font-size:10pt;margin:0pt;"><font style="font-size:1pt;visibility:hidden;">&#8203;</font></p></div></div></td></tr><tr><td style="vertical-align:top;width:49.97%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;margin:0pt;"><font style="font-size:10pt;margin-bottom:30pt;margin-top:12pt;visibility:hidden;">&#8203;</font></p></td><td colspan="2" style="vertical-align:top;width:50.02%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">CAPSTONE GREEN ENERGY CORPORATION</p></td></tr><tr><td style="vertical-align:top;width:49.97%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;margin:0pt;"><font style="font-size:10pt;margin-bottom:12pt;visibility:hidden;">&#8203;</font></p></td><td colspan="2" style="vertical-align:top;width:50.02%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;margin:0pt;"><font style="font-size:10pt;margin-bottom:12pt;visibility:hidden;">&#8203;</font></p></td></tr><tr><td style="vertical-align:top;width:49.97%;margin:0pt;padding:0pt;"><p style="font-family:'Arial','Helvetica','sans-serif';font-size:12pt;margin:0pt;"><font style="font-family:'Times New Roman','Times','serif';font-size:10pt;visibility:hidden;">&#8203;</font></p></td><td colspan="2" style="vertical-align:top;width:50.02%;margin:0pt;padding:0pt;"><p style="font-family:'Arial','Helvetica','sans-serif';font-size:12pt;margin:0pt;"><font style="font-family:'Times New Roman','Times','serif';font-size:10pt;visibility:hidden;">&#8203;</font></p></td></tr><tr><td style="vertical-align:top;width:49.97%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">Date: May 14, 2021</p></td><td style="vertical-align:top;width:3.44%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">By: </p></td><td style="vertical-align:top;width:46.57%;border-bottom:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">/s/ Frederick S. Hencken III</p></td></tr><tr><td style="vertical-align:top;width:49.97%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;margin:0pt;"><font style="font-size:10pt;margin-bottom:12pt;visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;width:3.44%;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:12pt;margin:0pt;"><font style="font-size:10pt;margin-bottom:12pt;visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;width:46.57%;border-top:1px solid #000000;margin:0pt;padding:0pt;"><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;">Name: Frederick S. Hencken III</p></td></tr><tr><td style="vertical-align:top;width:49.97%;margin:0pt;padding:0pt;"><p style="font-family:'Arial','Helvetica','sans-serif';font-size:12pt;margin:0pt;"><font style="font-family:'Times New Roman','Times','serif';font-size:10pt;visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;width:3.44%;margin:0pt;padding:0pt;"><p style="font-family:'Arial','Helvetica','sans-serif';font-size:12pt;margin:0pt;"><font style="font-family:'Times New Roman','Times','serif';font-size:10pt;visibility:hidden;">&#8203;</font></p></td><td style="vertical-align:top;width:46.57%;margin:0pt;padding:0pt;"><p style="font-family:'Arial','Helvetica','sans-serif';font-size:10pt;margin:0pt;"><font style="font-family:'Times New Roman','Times','serif';">Title: Chief Financial Officer (Principal Financial Officer)</font></p></td></tr></table></div><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><font style="visibility:hidden;">&#8203;</font></p></div></div><hr style="background-color:#000000;clear:both;color:#000000;height:2pt;line-height:0;margin-left:10.83%;margin-right:10.83%;margin-top:30pt;page-break-after:avoid;width:78.35%;border-width:0;"></body></html>
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​
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
​
FORM 8-K
​
CURRENT REPORT
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Pursuant to Section 13 or 15 (d) of The Securities Exchange Act of 1934
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Date of Report (Date of earliest event reported): May 13, 2021
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CAPSTONE GREEN ENERGY CORPORATION
(Exact name of registrant as specified in its charter)
​
​
​
​
​
Delaware
001-15957
95-4180883
(State or other jurisdiction of incorporation)
(Commission File Number)
(IRS Employer Identification No.)
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​
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16640 Stagg Street,
Van Nuys, California
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91406
(Address of principal executive offices)
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(Zip Code)
(818) 734-5300
(Registrant's telephone number, including area code)
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Former name or former address, if changed since last report: N/A
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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:
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◻
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
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◻
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
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◻
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
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◻
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
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Securities registered pursuant to Section 12(b) of the Act:
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Title of each class
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Trading Symbol(s)
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Name of each exchange on which registered
Common Stock, par value $.001 per share
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CGRN
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NASDAQ Capital Market
Series B Junior Participating Preferred Stock Purchase Rights
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​
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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).
​
Emerging growth company
◻
​
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.
◻
Item 1.01
Entry into Material Definitive Agreement.
First Amendment to Amended and Restated Note Purchase Agreement
​
On May 13, 2021 (the "Amendment Date"), Capstone Green Energy Corporation (the "Company"), certain subsidiaries of the company (the "Guarantors"), the Purchaser party thereto (the "Purchaser") and Goldman Sachs Specialty Lending Group, L.P. (as successor in interest to Goldman Sachs Specialty Lending Holdings, Inc.), as collateral agent (the "Collateral Agent"), entered into a First Amendment, dated as of May 13, 2021 (the "Amendment"), to the Amended and Restated Note Purchase Agreement, dated as of October 1, 2020 (the "Closing Date"), by and among the Company, the Guarantors, the Purchaser and the Collateral Agent (the "A&R Note Purchase Agreement").  The Amendment amends certain provisions of the A&R Note Purchase Agreement, including to (a) require the Company to expand its Rental Fleet (as defined in the A&R Note Purchase Agreement) by (i) at least 2.00 MW by the 9-month anniversary of the Closing Date (instead of 6.25 MW as provided in the A&R Note Purchase Agreement prior to the Amendment), and (ii) at least 12.50 MW by the 18-month anniversary of the Closing Date (which is unchanged from the covenant set forth in in the A&R Note Purchase Agreement prior to the Amendment), and (b) increase the Company's minimum consolidated liquidity requirement from $9,000,000 to $12,200,000 for the period from the Amendment Date to March 31, 2022.
​
The foregoing description of the Amendment does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Amendment, which is filed herewith as Exhibit 10.1 to this Current Report and is incorporated by reference herein.
​
Item 9.01
Financial Statements and Exhibits.
(d) Exhibits.
Exhibit Number
Exhibit Description
10.1
First Amendment, dated as of May 13, 2021, to the Amended and Restated Note Purchase Agreement, by and among Capstone Green Energy Corporation, certain subsidiaries of the Company and Goldman Sachs Specialty Lending Group, L.P.
​
​
​
​
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.
​
​
​
​
CAPSTONE GREEN ENERGY CORPORATION
​
​
​
​
Date: May 14, 2021
By:
/s/ Frederick S. Hencken III
​
​
Name: Frederick S. Hencken III
​
​
Title: Chief Financial Officer (Principal Financial Officer)
​