YMTX Yumanity Therapeutics Inc

As previously disclosed, on June 5, 2022, Yumanity Therapeutics, Inc., a Delaware corporation (“Yumanity”), entered into an Asset Purchase Agreement (the “Asset Purchase Agreement”) with Janssen Pharmaceutica NV (“Janssen”). Concurrently with the execution of the Asset Purchase Agreement, on June 5, 2022, Yumanity entered into an Agreement and Plan of Merger with Kineta, Inc., a Washington corporation (“Kineta”), and Yacht Merger Sub, Inc., a Washington corporation and wholly-owned subsidiary of Yumanity.

On November 29, 2022, Kineta announced that Shawn Iadonato, Ph.D., Kineta’s Chief Executive Officer, will present at the JMP Securities Hematology and Oncology Summit (the “Summit”), a virtual investor event to be held from December 6-7, 2022. On December 6, 2022, Dr. Iadonato presented a corporate update and overview of KVA12123 (formerly referred to as KVA12.1), Kineta’s VISTA blocking immunotherapy. A copy of the slide presentation presented at the Summit is attached hereto as Exhibit 99.1.

The information in this Item 7.01, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, and shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Important Information and Where to Find It

This communication may be deemed to be solicitation material with respect to the proposed transactions between Yumanity and Kineta and between Yumanity and Janssen. In connection with the proposed transactions, on August 29, 2022, Yumanity filed with the U.S. Securities and Exchange Commission (the “SEC”) a registration statement on Form S-4 (the “Initial Registration Statement”), as amended by Amendment No. 1 to the Initial Registration Statement filed with the SEC on October 3, 2022, Amendment No. 2 to the Initial Registration Statement filed with the SEC on October 24, 2022 and Amendment No. 3 to the Initial Registration Statement filed with the SEC on November 4, 2022 (together with the Initial Registration Statement, the “Registration Statement”), which contains a preliminary proxy statement and prospectus. The Registration Statement has been declared effective by the SEC on November 10, 2022. Yumanity subsequently filed the definitive proxy statement/prospectus (the “Proxy Statement”) on November 10, 2022, which has been mailed to stockholders of record as of the close of business on November 4, 2022. On December 5, 2022, Yumanity filed with the SEC and mailed to stockholders of record as of the close of business on November 4, 2022, a supplement to the proxy statement and prospectus contained in the Registration Statement (the “Prospectus Supplement”). Investors and securityholders of Yumanity and Kineta are urged to read these materials when they become available because they contain important information about Yumanity, Kineta and the proposed transactions. This communication is not a substitute for the Registration Statement, the Proxy Statement, the Prospectus Supplement or any other documents that

Yumanity may file with the SEC or send to securityholders in connection with the proposed transactions. Investors and securityholders may obtain free copies of the documents filed with the SEC, once available, on Yumanity’s website at www.yumanity.com, on the SEC’s website at www.sec.gov or by directing a request to Yumanity’s Investor Relations at (212) 213-0006 ext. 331.

This communication shall not constitute an offer to sell or the solicitation of an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act.

Participants in the Solicitation

Each of Yumanity, Kineta and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the stockholders of Yumanity in connection with the proposed transactions. Information about the executive officers and directors of Yumanity is set forth in Yumanity’s Definitive Proxy Statement on Schedule 14A relating to the 2022 Annual Meeting of Stockholders, filed with the SEC on April 25, 2022. Other information regarding the interests of such individuals, who may be deemed to be participants in the solicitation of proxies for the stockholders of Yumanity, is set forth in the Proxy Statement and will be set forth in any other relevant documents to be filed with the SEC. You may obtain free copies of these documents as described above.

Cautionary Statement Regarding Forward-Looking Statements

This Current Report on Form 8-K and the exhibit furnished herewith contain forward-looking statements, including statements made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These statements may be identified by words and phrases such as “aims,” “anticipates,” “believes,” “could,” “designed to,” “estimates,” “expects,” “forecasts,” “goal,” “intends,” “may,” “plans,” “possible,” “potential,” “seeks,” “will,” and variations of these words and phrases or similar expressions that are intended to identify forward-looking statements. These forward-looking statements include, without limitation, statements regarding the proposed merger between Yumanity and Kineta and the proposed asset sale to Janssen, including whether and when the transactions will be consummated; statements about the structure, timing and completion of the proposed transactions; the listing of the combined company on Nasdaq after the closing of the proposed merger; expectations regarding the ownership structure of the combined company after the closing of the proposed merger; the expected executive officers and directors of the combined company; the expected cash position of each of Yumanity and Kineta and the combined company at the closing of the proposed merger; the future operations of the combined company; the nature, strategy and focus of the combined company; the development and commercial potential and potential benefits of any product candidates of the combined company; the executive and board structure of the combined company; the location of the combined company’s corporate headquarters; anticipated preclinical and clinical drug development activities and related timelines, including the expected timing for data and other clinical and preclinical results; Kineta having sufficient resources to advance its pipeline; and other statements that are not historical fact. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties, which include, without limitation: (i) the risk that the conditions to the closing of the proposed transactions are not satisfied, including the failure to timely obtain stockholder approval for the transactions, if at all; (ii) uncertainties as to the timing of the consummation of the proposed transactions and the ability of each of Yumanity, Kineta, Janssen and the institutional investors party to the securities purchase agreement, dated as of June 5, 2022 and as amended on October 24, 2022 and December 5, 2022, among Yumanity, Kineta and the institutional investors, to consummate the proposed merger, asset sale or the transactions contemplated by the securities purchase agreement, as applicable; (iii) risks related to Yumanity’s ability to manage its operating expenses and its expenses associated with the proposed transactions pending closing; (iv) risks related to the failure or delay in obtaining required approvals from any governmental or quasi-governmental entity necessary to consummate the proposed transactions; (v) the risk that as a result of adjustments to the exchange ratio, Yumanity stockholders and Kineta shareholders could own more or less of the combined company than is currently anticipated; (vi) risks related to the market price of Yumanity’s common stock relative to the exchange ratio; (vii) unexpected costs, charges or expenses resulting from either or both of the proposed transactions; (viii) potential adverse reactions or changes to business relationships resulting from the announcement or completion of the proposed transactions; (ix) the risk that the amount of the dividend distributed to Yumanity stockholders in

connection with the asset sale, if any, may be lower than currently anticipated; (x) risks related to the inability of the combined company to obtain sufficient additional capital to continue to advance these product candidates and its preclinical programs; (xi) uncertainties in obtaining successful clinical results for product candidates and unexpected costs that may result therefrom; (xii) risks related to the failure to realize any value from product candidates and preclinical programs being developed and anticipated to be developed in light of inherent risks and difficulties involved in successfully bringing product candidates to market; and (xiii) risks associated with the possible failure to realize certain anticipated benefits of the proposed transactions, including with respect to future financial and operating results. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties. These and other risks and uncertainties are more fully described in periodic filings with the SEC, including the factors described in the section titled “Risk Factors” in Yumanity’s most recent Annual or Quarterly Report filed with the SEC, and in other filings that Yumanity makes and will make with the SEC in connection with the proposed transactions, including the Proxy Statement. You should not place undue reliance on these forward-looking statements, which are made only as of the date hereof or as of the dates indicated in the forward-looking statements. Except as required by law, Yumanity expressly disclaims any obligation or undertaking to update or revise any forward-looking statements contained herein to reflect any change in its expectations with regard thereto or any change in events, conditions or circumstances on which any such statements are based.