{"url_path":"/sec/oust/proxy/2026-05-15/000119312526226667","section_key":"body","section_title":"DEFA14A body","topic":"sec","document":{"doc_type":"DEFA14A","doc_date":"2026-05-15","source_url":"https://www.sec.gov/Archives/edgar/data/1816581/0001193125-26-226667-index.html","accession_number":"0001193125-26-226667","cik":"0001816581","ticker":"OUST","issuer_name":"Ouster, Inc.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1816581/0001193125-26-226667-index.html","primary_entity_key":"0001816581","primary_entity_name":"Ouster, Inc."},"word_count":407,"has_tables":true,"body_markdown":"DEFA14A\n1\nd112452ddefa14a.htm\nDEFA14A\n\nDEFA14A\n\n**UNITED STATES**\n\n**SECURITIES AND EXCHANGE COMMISSION**\n\n**Washington, DC 20549**\n\n**SCHEDULE 14A**\n\n**(Rule 14a-101)**\n\n**INFORMATION REQUIRED IN PROXY STATEMENT**\n\n**SCHEDULE 14A INFORMATION**\n\n**Proxy Statement Pursuant to Section 14(a) of**\n\n**the Securities Exchange Act of 1934 (Amendment No. )**\n\nFiled by the Registrant ☒\n\nFiled by a Party other\nthan the Registrant ☐\n\nCheck the appropriate box:\n\n☐\n\nPreliminary Proxy Statement\n\n****☐********\n\n**Confidential, for Use of the Commission Only (as permitted by Rule\n14a-6(e)(2))**\n\n☐\n\nDefinitive Proxy Statement\n\n☒\n\nDefinitive Additional Materials\n\n☐\n\nSoliciting Material Pursuant to §240.14a-12\n\n**OUSTER, INC.**\n\n**(Name of\nRegistrant as Specified in its Charter)**\n\n**(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)**\n\nPayment of Filing Fee (Check all boxes that apply):\n\n☒\n\nNo fee required.\n\n☐\n\nFee paid previously with preliminary materials.\n\n☐\n\nFee computed on table in exhibit required by Item 25(b) per Exchange Act Rules\n14a-6(i)(1) and 0-11.\n\n**SUPPLEMENT TO PROXY STATEMENT**\n\n**FOR THE ANNUAL MEETING OF STOCKHOLDERS**\n\n**TO BE HELD ON JUNE 17, 2026**\n\nThis\nproxy statement supplement (this “Supplement”), dated May 15, 2026, supplements and amends the proxy statement filed with the Securities and Exchange Commission on April 28, 2026 (the “Proxy Statement”) relating to\nthe proxies being solicited by the Board of Directors (the “Board”) of Ouster, Inc., a Delaware corporation (the “Company” and “we,” “us” or “our”), in connection with our 2026 Annual\nMeeting of Stockholders to be held on Wednesday, June 17, 2026. This Supplement should be read together with the Proxy Statement. Other than as set forth below, no changes have been made to the Proxy Statement.\n\n**Engagement of Proxy Solicitor**\n\nWe have engaged Alliance\nAdvisors, LLC, an independent proxy solicitation firm, to assist in soliciting proxies on our behalf. The Company has agreed to pay a fee of $10,000, plus costs and expenses, for these and related services.\n\n**Expenses and Manner of Solicitation**\n\nAs noted in the\nProxy Statement, the Company will bear the expense of soliciting proxies by the Board. In addition to the use of mail, proxies may be solicited by personal interview, telephone, e-mail and facsimile by our\ndirectors, officers and other employees who will not be specially compensated for these services. We will also request that brokers, nominees, custodians and other fiduciaries forward soliciting materials to the beneficial owners of shares held by\nthe brokers, nominees, custodians and other fiduciaries. We will reimburse these persons for their reasonable expenses in connection with these activities."}