{"url_path":"/sec/rpid/8-k/2026-05-19/item-1-01","section_key":"item-1-01","section_title":"Item 1.01 **","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-05-19","source_url":"https://www.sec.gov/Archives/edgar/data/1380106/0001104659-26-063936-index.html","accession_number":"0001104659-26-063936","cik":"0001380106","ticker":"RPID","issuer_name":"RAPID MICRO BIOSYSTEMS, INC.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1380106/0001104659-26-063936-index.html","primary_entity_key":"0001380106","primary_entity_name":"RAPID MICRO BIOSYSTEMS, INC."},"word_count":1731,"has_tables":true,"body_markdown":"**Item 1.01**\n**Entry into a Material Definitive Agreement.**\n\n \n\n*Underwriting Agreement*\n\n \n\nOn May 18, 2026, Rapid Micro Biosystems, Inc. (the “Company”)\nentered into an underwriting agreement (the “Underwriting Agreement”) with TD Securities (USA) LLC and Lake Street Capital\nMarkets LLC, as representatives of the several underwriters named therein (the “Underwriters”) relating to an underwritten\noffering (the “Offering”) of (i) 3,581,000 shares (the “Shares”) of the Company’s Class A common\nstock, $0.01 par value per share (the “Common Stock”) and accompanying Series A warrants (“Series A Common\nStock Warrants”) to purchase an aggregate of 3,581,000 shares of Class A common stock (or pre-funded warrants in lieu thereof)\nand Series B warrants (“Series B Common Stock Warrants”) to purchase an aggregate of 3,581,000 shares of Class A\ncommon stock (or pre-funded warrants in lieu thereof), and, (ii) in lieu of Common Stock to certain investors, pre-funded warrants\nto purchase an aggregate of up to 1,463,000 shares of Common Stock (the “Pre-Funded Warrants” and together with the Series A\nCommon Stock Warrants, and Series B Common Stock Warrants, the “Warrants” and the shares of Common Stock issuable upon\nexercise of the warrants, the “Warrant Shares”) and accompanying Series A Common Stock Warrants to purchase an aggregate\nof 1,463,000 shares of Class A common stock (or pre-funded warrants in lieu thereof) at an exercise price of $1.955 per share and\nSeries B Common Stock Warrants to purchase an aggregate of 1,463,000 shares of Class A common stock (or pre-funded warrants\nin lieu thereof) at an exercise price of $2.340 per share. Each Share was offered and sold together with an accompanying Series A\nCommon Stock Warrant and a Series B Common Stock Warrant at a combined offering price of $1.955, and each Pre-Funded Warrant was\noffered and sold together with an accompanying Series A Common Stock Warrant and a Series B Common Stock Warrant at a combined\noffering price of $1.945, which is equal to the combined offering price per share of Common Stock and accompanying Series A Common\nStock Warrant and Series B Common Stock Warrant less the $0.01 exercise price of each Pre-Funded Warrant. The Offering is expected\nto close on May 20, 2026, subject to customary closing conditions.\n\n \n\nEach Pre-Funded Warrant has an initial exercise price per share of\n$0.01, subject to certain adjustments. The Pre-Funded Warrants are exercisable immediately and may be exercised at any time until all\nof the Pre-Funded Warrants are exercised in full. Each Series A Common Stock Warrant has an initial exercise price per share of $1.955,\nsubject to certain adjustments and each Series B Common Stock Warrant has an initial exercise price per share of $2.340, subject\nto certain adjustments. The Series A Common Stock Warrants are exercisable 6 months from the date of issuance and will expire one\nyear from the date of issuance. The Series B Common Stock Warrants are exercisable 6 months from the date of issuance and will expire\nfive years from the date of issuance.\n\n \n\nUnder the Warrants, the Company\nmay not effect the exercise of any Warrant, and a holder will not be entitled to exercise any portion of any Warrant (i) if immediately\nprior to the exercise, holder (together with its affiliates), beneficially own an aggregate number of shares of Common Stock greater than\n4.5% or 4.99% or 9.99%, as applicable (the “Maximum Percentage”) of the total number of issued and outstanding shares of Common\nStock of the Company without taking into account any Warrant Shares, or (ii) to the extent that immediately following the exercise,\nthe holder (together with its affiliates) would beneficially own in excess of the Maximum Percentage of the number of shares of Common\nStock outstanding immediately after giving effect to the issuance of such shares of Common Stock, which such percentage may be changed\nat the holder’s election to a higher or lower percentage not in excess of 19.99% upon 61 days’ notice to the Company.\n\n \n\nThe Series A Common Stock\nWarrants include certain rights upon “fundamental transactions” as described therein, including the right of the holders thereof\nto receive, upon exercise of the Series A Common Stock Warrants following such fundamental transaction, the same amount and kind\nof securities, cash or property as the holder would have been entitled to receive upon the occurrence of such fundamental transaction\nif it had been, immediately prior to such fundamental transaction, the holder of the number of Warrant Shares issuable upon exercise of\nthe Series A Common Stock Warrants.\n\n \n\nThe Series\nA Common Stock Warrants also contain a forced exercise provision granting the Company the right, upon the satisfaction of specified conditions,\nto require holders to exercise all or any portion of their Series A Common Stock Warrants.\n\n \n\nThe Series B Common Stock\nWarrants include certain rights upon “fundamental transactions” as described therein, including the right of the holders thereof\nto receive from the Company or a successor entity the same type or form of consideration (and in the same proportion) that is being offered\nand paid to the holders of Common Stock in such fundamental transaction in the amount of the Black Scholes Value (as described in such\nSeries A Common Stock Warrants) of the unexercised portion of the applicable Series B Common Stock Warrants on the date of the\nconsummation of such fundamental transaction.\n\n \n\nThe Series B Common Stock\nWarrants also include a participation rights whereby for a period of twelve months from the original issue date, holders of the Series\nB Common Stock Warrants have the right to participate in future issuances of the Company’s Class A common stock or Common Stock\nequivalents on pro rata basis, up to an aggregate of 25% of such offering, subject to certain conditions.\n\n \n\n \n\n \n\n \n\nThe Company estimates that\nthe net proceeds from the Offering will be approximately $8.9 million, after deducting underwriting discounts and commissions and estimated\noffering expenses payable by the Company. The Company intends to use the net proceeds from the Offering to fund working capital and other\ngeneral corporate purposes.\n\n \n\nThe Shares and the Warrants were issued pursuant to a shelf registration\nstatement on Form S-3 (File No. 333-276081), as filed with the U.S. Securities and Exchange Commission (“SEC”) on\nDecember 15, 2023 and declared effective on December 26, 2023 (the “Registration Statement”), and a related prospectus\nincluded in the Registration Statement, as supplemented by a prospectus supplement dated May 18, 2026.\n\n \n\nThe Underwriting Agreement\ncontains customary representations, warranties, covenants, indemnification obligations of the Company and the Underwriters, including\nfor liabilities under the Securities Act of 1933, as amended, and other obligations of the parties. The representations, warranties and\ncovenants contained in the Underwriting Agreement were made only for purposes of such agreement and as of specific dates, were solely\nfor the benefit of the parties to such agreement, and may be subject to limitations agreed upon by the contracting parties. The foregoing\nis only a brief description of the terms of the Underwriting Agreement, does not purport to be a complete statement of the rights and\nobligations of the parties under the Underwriting Agreement and the transactions contemplated thereby, and is qualified in its entirety\nby reference to the Underwriting Agreement, which is filed as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated\nherein by reference.\n\n \n\nThe foregoing is only a brief\ndescription of the terms of the form of Warrants, does not purport to be a complete statement of the rights and obligations of the parties\nthereto and the transactions contemplated thereby, and is qualified in its entirety by reference to the form of Pre-Funded Warrant, the\nform of Series A Common Stock Warrant and form of Series B Common Stock Warrant that are filed as Exhibit 4.1, Exhibit 4.2\nand Exhibit 4.3, respectively, to this Current Report on Form 8-K and are incorporated herein by reference.\n\n \n\nA copy of the legal opinion\nof Goodwin Procter LLP, relating to the validity of the shares issued in the Offering is filed as Exhibit 5.1 to this Current Report\non Form 8-K and is filed with reference to, and is hereby incorporated by reference into, the Registration Statement.\n\n \n\n*Securities Purchase Agreement*\n\n \n\nOn May 18, 2026,\nthe Company also entered into a Securities Purchase Agreement (the “Purchase Agreement”) with certain of the\nCompany’s directors and officers (the “D&Os”). Pursuant to the Purchase Agreement, the Company agreed to issue\nand sell to the D&Os in a registered direct offering 71,607 shares of Common Stock and accompanying Series A Common Stock\nWarrants to purchase an aggregate of 71,607 shares of Common Stock (or Pre-Funded Warrants in lieu thereof) with an exercise price\nof $1.955 per share and Series B Common Stock warrants to purchase an aggregate of 71,607 shares of Common Stock (or Pre-Funded\nWarrants in lieu thereof) with an exercise price of $2.34 per share (the “Concurrent Offering”) for gross proceeds of\napproximately $140,000. Each Share was offered and sold together with an accompanying Series A Common Stock Warrant and a\nSeries B Common Stock Warrant at a combined offering price of $1.955. The terms of the Series A Common Stock Warrants and\nSeries B Common Stock Warrants sold to investors in the Concurrent Offering are identical to those sold to investors in the\nOffering. The Concurrent Offering was made without an underwriter or placement agent. The Company intends to use the net proceeds of\nthe Concurrent Offering to fund working capital and other general corporate purposes. The Concurrent Offering is anticipated to\nclose on or about May 20, 2026, and is contingent and conditioned upon consummation of, the Offering, as well as certain other\ncustomary closing conditions in the Purchase Agreement.\n\n \n\nThe Purchase Agreement contains\ncustomary representations, warranties, and agreements by the Company. The foregoing summary of the Purchase Agreement is qualified in\nits entirety by the full text of the Purchase Agreement, which is filed herewith as Exhibit 10.1 and incorporated herein by reference.\n\n \n\nThe securities in the Concurrent Offering were offered and sold by\nthe Company pursuant to the Registration Statement, and a related prospectus included in the Registration Statement, as supplemented by\na prospectus supplement dated May 18, 2026.\n\n \n\nA copy of the legal opinion\nof Goodwin Procter LLP, relating to the validity of the shares issued in the Concurrent Offering, is filed as Exhibit 5.2 to this\nCurrent Report on Form 8-K and is filed with reference to, and is hereby incorporated by reference into, the Registration Statement."}