{"url_path":"/sec/eq/10-q/2026/item-6","section_key":"item-6","section_title":"Item 6 Exhibits","topic":"sec","document":{"doc_type":"10-Q","doc_date":"2026-05-13","source_url":"https://www.sec.gov/Archives/edgar/data/1746466/0001193125-26-221625-index.html","accession_number":"0001193125-26-221625","cik":"0001746466","ticker":"EQ","issuer_name":"Equillium, Inc.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1746466/0001193125-26-221625-index.html","primary_entity_key":"0001746466","primary_entity_name":"Equillium, Inc."},"word_count":798,"has_tables":true,"body_markdown":"Item 6. Exhibits\n\nThe following exhibits are filed as part of, or incorporated by reference into this Quarterly Report on Form 10-Q.\n\nExhibit\n\nNumber\n\nDescription of Exhibit\n\n2.1††*\n\n \n\n[Agreement and Plan of Merger, dated February 14, 2022, by and among the Registrant, Bioniz Therapeutics, Inc., Project JetFuel Merger Sub, Inc. and Kevin Green, solely in his capacity as Securityholders’ Representative, incorporated by reference by Exhibit 2.1 of the Registrant’s Current Report on Form 8-K, filed with the Securities and Exchange Commission on February 16, 2022.](https://www.sec.gov/Archives/edgar/data/1746466/000119312522043939/d320942dex21.htm)\n\n \n\n \n\n \n\n3.1\n\n[Amended and Restated Certificate of Incorporation of the Registrant, incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K filed on October 16, 2018.](https://www.sec.gov/Archives/edgar/data/1746466/000119312518300246/d634419dex31.htm)\n\n \n\n \n\n \n\n3.2\n\n[Amended and Restated Bylaws of the Registrant, incorporated by reference to Exhibit 3.2 of the Registrant’s Current Report on Form 8-K filed on October 16, 2018.](https://www.sec.gov/Archives/edgar/data/1746466/000119312518300246/d634419dex32.htm)\n\n \n\n \n\n \n\n4.1\n\n[Form of Common Stock Certificate of the Registrant, incorporated by reference to Exhibit 4.1 of the Registrant’s Registration Statement on Form S-1 (File No. 333-227387), as amended, originally filed with the Securities and Exchange Commission on September 17, 2018.](https://www.sec.gov/Archives/edgar/data/1746466/000119312518290169/d582934dex41.htm)\n\n \n\n \n\n \n\n4.2\n\n \n\n[Warrant to Purchase Common Stock, dated September 30, 2019, issued to Oxford Finance LLC, incorporated by reference to Exhibit 4.2 of the Registrant’s Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on November 12, 2019.](https://www.sec.gov/Archives/edgar/data/1746466/000156459019042933/eq-ex42_45.htm)\n\n \n\n \n\n \n\n4.3\n\n \n\n[Warrant to Purchase Common Stock, dated September 30, 2019, issued to Silicon Valley Bank, incorporated by reference to Exhibit 4.3 of the Registrant’s Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on November 12, 2019.](https://www.sec.gov/Archives/edgar/data/1746466/000156459019042933/eq-ex43_43.htm)\n\n \n\n \n\n \n\n4.4\n\n \n\n[Description of Common Stock, incorporated by reference to Exhibit 4.4 of the Registrant's Annual Report on Form 10-K, filed with the Securities and Exchange Commission on March 26, 2020.](https://www.sec.gov/Archives/edgar/data/1746466/000156459020013207/eq-ex44_352.htm)\n\n \n\n \n\n \n\n 4.5†\n\n \n\n[Registration Rights Agreement, dated August 12, 2025, by and between the Registrant and the investors named therein, incorporated reference to Exhibit 4.5 of the Registrant's Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on August 14, 2025.](https://www.sec.gov/Archives/edgar/data/1746466/000095017025108834/eq-ex4_5.htm)\n\n \n\n \n\n \n\n4.6\n\n \n\n[Form of Pre-Funded Warrant to Purchase Common Stock, incorporated by reference to Exhibit 4.2 of the Registrant's Current Report on Form 8-K, filed with the Securities and Exchange Commission on August 11, 2025.](https://www.sec.gov/Archives/edgar/data/1746466/000119312525177510/d448302dex42.htm)\n\n \n\n \n\n \n\n4.7\n\n \n\n[Form of Pre-Funded Warrant to Purchase Common Stock, incorporated by reference to Exhibit 4.1 of the Registrant's Current Report on Form 8-K, filed with the Securities and Exchange Commission on March 13, 2026.](https://www.sec.gov/Archives/edgar/data/1746466/000119312526105083/d125584dex41.htm)\n\n \n\n \n\n \n\n4.8*\n\n \n\n[Registration Rights Agreement, dated March 13, 2026, by and between the Registrant and the investor named therein, incorporated by reference to Exhibit 4.3 of the Registrant's Registration Statement on Form S-3, filed with the Securities and Exchange Commission on April 7, 2026.](https://www.sec.gov/Archives/edgar/data/1746466/000119312526145746/d116924dex43.htm)\n\n \n\n \n\n \n\n10.1*\n\n \n\n[Securities Purchase Agreement, dated March 11, 2026, by and between the Registrant and the investor named therein, incorporated by reference to Exhibit 10.1 of the Registrant's Current Report on Form 8-K, filed with the Securities and Exchange Commission on March 13, 2026.](https://www.sec.gov/Archives/edgar/data/1746466/000119312526105083/d125584dex101.htm)\n\n \n\n \n\n \n\n31.1\n\n[Certification of Principal Executive Officer and Principal Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) of the Securities Exchange Act, as amended.](eq-ex31_1.htm)\n\n \n\n \n\n \n\n32.1**\n\n[Certification of Principal Executive Officer and Principal Financial Officer pursuant to Rules 13a-14(b) or 15d-14(b) of the Securities Exchange Act, as amended, and 18 U.S.C. Section 1350.](eq-ex32_1.htm)\n\n \n\n \n\n \n\n101.INS\n\nInline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document\n\n \n\n \n\n \n\n101.SCH\n\nInline XBRL Taxonomy Extension Schema With Embedded Linkbase Documents\n\n \n\n \n\n \n\n104\n\n \n\nCover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101)\n\n \n\n* Schedules and exhibits to the agreement have been omitted pursuant to Item 601(a)(5) of Regulation S-K. A copy of any omitted schedule and/or exhibit will be furnished to the Securities and Exchange Commission upon request.\n\n \n\n** This certification will 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 liability of that section. Such certification will not be deemed to be incorporated by\n\n68\n\n \n\nreference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except to the extent specifically incorporated by reference into such filing.\n\n† Confidential treatment has been granted with respect to certain portions of this exhibit. Omitted portions have been filed separately with the Securities and Exchange Commission.\n\n†† Certain information in this exhibit has been omitted pursuant to Item 601 of Regulation S-K.\n\n69\n\n \n\nSIGNATURES\n\nPursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.\n\n \n\nDate: May 13, 2026\n\nEQUILLIUM, INC.\n\nBy:\n\n/s/ Bruce D. Steel\n\nBruce D. Steel\n\nChief Executive Officer\n\n(Principal Executive Officer and Principal Financial Officer)\n\n \n\n \n\n70"}