Oklo Appoints Five New Executive Officers to Strengthen Leadership Team

Alexandra Renner Assumes Chief Product Officer Role

Alexandra Renner, 35, has been formalized as Chief Product Officer of Oklo following her service in that capacity since May 2024. The disclosure indicates that Renner has held multiple positions within the company since joining in June 2016, progressing through roles including Engineer, Director of Licensing, and Senior Director of Product before moving into the Chief Product Officer position. Her career prior to Oklo included service at the U.S. Nuclear Regulatory Commission from 2013 to 2016, where she worked in reactor engineering, project management, and inspection roles. The filing states that during her tenure at the Nuclear Regulatory Commission, she participated in activities supporting the startup of Watts Bar Unit 2.

Renner holds a Bachelor of Science degree in Nuclear Engineering from the University of Tennessee, Knoxville. Her background in nuclear regulation and engineering, combined with nearly a decade of internal experience at Oklo, positions her with significant technical and regulatory knowledge relevant to the company's nuclear technology focus. The formalization of her Chief Product Officer appointment reflects the company's recognition of her leadership in product development and strategy.

John Hanson Appointed as Chief of Staff

John Hanson, 39, has been appointed as Chief of Staff after serving in that role since May 2024. Hanson joined Oklo in 2015 and has held several technical and leadership positions, including Reactor Engineer, Director of Policies and Procedures, and Senior Director of Special Projects. The filing indicates he held the Senior Director of Special Projects role from February 2022 to September 2024 before transitioning to Chief of Staff. Prior to his tenure at Oklo, Hanson was a U.S. Department of Energy Office of Science Graduate Research Fellow at the Massachusetts Institute of Technology, where he conducted research focused on nuclear materials and corrosion science.

Hanson holds a Ph.D. in Nuclear Science and Engineering from Massachusetts Institute of Technology and Bachelor of Science degrees in Mechanical Engineering and Economics from The Ohio State University. His academic background and research experience in nuclear materials complement his practical engineering experience at Oklo, where he has contributed to reactor engineering and operational policy development over the past eleven years. His appointment to Chief of Staff formalizes a role he has been fulfilling since mid-2024.

Vivek Narayanadas Named General Counsel and Corporate Secretary

Vivek Narayanadas, 42, has been appointed as General Counsel and Corporate Secretary, a position he has held since October 2025 after initially joining Oklo as Head of Legal in February 2025. The disclosure describes his background prior to Oklo as including executive legal roles at multiple high-growth companies across healthcare technology, software-as-a-service, and advertising technology sectors. He served as Deputy General Counsel at Maven Clinic Co., a healthcare technology company, from May 2023 to January 2025. Before that role, he was General Counsel and Corporate Secretary at MetaMap, Inc., a software-as-a-service company, from December 2021 to May 2023.

Narayanadas also held senior legal leadership positions at Shopify Inc. and The Rubicon Project, Inc. prior to moving into in-house counsel roles. The filing indicates he started his career as a litigator, focusing on intellectual property, securities, and class action litigation at two large law firms. He holds a J.D. from Columbia Law School and a Bachelor of Arts in History and Economics from the University of California, Berkeley. His appointment formalizes legal leadership at Oklo as the company expands its executive structure.

Erik Lassen Joins as Senior Vice President of Engineering

Erik Lassen, 48, has been appointed as Senior Vice President of Engineering, a position he has held since April 2026. Prior to that appointment, Lassen served as Senior Director of Manufacturing Center of Excellence from January 2026 to April 2026. Before joining Oklo, Lassen held various engineering and manufacturing leadership roles at Joby Aviation, Inc. from 2019 to 2026, most recently serving as Aircraft Final Assembly and Integration Lead. His earlier career included founding and serving as Chief Technology Officer of Monolith Aeroworks LLC from 2011 to 2019.

Lassen also held engineering positions with Virgin Galactic, LLC and Scaled Composites, LLC, where the filing indicates he contributed to the development, testing, and manufacturing of advanced aerospace and spaceflight systems. He holds a Bachelor of Science degree in Manufacturing Engineering from Brigham Young University. His background in advanced manufacturing and systems integration from the aerospace industry brings specialized expertise to Oklo's engineering operations. His appointment as Senior Vice President of Engineering represents a formalization of leadership responsibilities he has carried since April 2026.

Michael Dixon Appointed Vice President of Accounting and Controller

Michael Dixon, 42, has been appointed as Vice President of Accounting and Controller, and will serve as the company's Principal Accounting Officer. Dixon joined Oklo in May 2026 and held that position before his formal appointment as executive officer. Prior to Oklo, Dixon was employed by National Grid USA Service Company from April 2020 to May 2026. In his most recent role at National Grid, he served as Vice President, US/New York Controller and Financial Planning and Analysis from April 2024 to April 2026, where the filing states he was responsible for certifying financial statements and Sarbanes-Oxley Act certifications of National Grid North America and National Grid USA, as well as the regulated utility subsidiaries in New York.

Dixon also held roles as Vice President, US Controller and Director, US Assistant Controller at National Grid. Before National Grid, he was employed by PricewaterhouseCoopers LLP from 2006 to 2020. He is a Chartered Accountant and member of the Institute of Chartered Accountants in England and Wales. Dixon holds a Bachelor of Science degree in Mathematics from the University of Edinburgh. His experience with financial reporting, budgeting, and regulatory compliance at a large utility company brings substantial accounting and financial management expertise to Oklo's finance function.

No Related-Party Issues or Compensation Changes Noted

The filing states that there is no arrangement or understanding between any of the five appointees and any other person pursuant to which they were appointed to their respective positions. Additionally, the disclosure confirms that none of the appointees have family relationships with any director or other executive officer of Oklo, nor with any person nominated or chosen to become a director or executive officer. The filing further indicates that none of the appointees are parties to any transaction that would require disclosure under Item 404(a) of Regulation S-K.

In connection with these appointments, the disclosure specifies that the company did not enter into any new compensatory plan, contract or arrangement with any of the appointees, did not grant any equity awards, and did not materially amend any existing compensatory plan, contract or arrangement applicable to them. Each appointee will continue to be employed pursuant to existing employment arrangements with the company. This structure suggests that these appointments formalize roles the individuals have already been filling rather than representing new hiring or compensation increases.

Emerging Growth Company Status and Regulatory Framework

Oklo remains classified as an emerging growth company as defined under Rule 405 of the Securities Act of 1933 and Rule 12b-2 of the Securities Exchange Act of 1934. The company has elected not to use the extended transition period for complying with new or revised financial accounting standards provided pursuant to Section 13(a) of the Securities Exchange Act. This status indicates the company may be subject to certain reduced disclosure requirements under federal securities regulations, though it has opted to adopt new accounting standards on the standard timeline.

The appointments were disclosed through a current report filed on July 28, 2026, signed by R. Craig Bealmear, Chief Financial Officer. The disclosure addresses Item 5.02 concerning departures and appointments of directors and officers. The timing of the announcement and the effective date of July 27, 2026 provide investors and stakeholders with formal notice of the executive leadership structure that will govern the company's operations going forward.

Leadership Experience and Industry Background

The five appointees collectively bring experience spanning nuclear engineering and regulation, aerospace manufacturing, healthcare technology, financial management at regulated utilities, and accounting and audit functions at major firms. Renner and Hanson both possess advanced nuclear engineering credentials and years of experience at Oklo, while Narayanadas brings in-house legal experience from multiple sectors and prior law firm practice. Lassen contributes advanced manufacturing and systems integration expertise from aerospace, and Dixon brings substantial financial and regulatory compliance experience from utility and professional services backgrounds.

The appointment of these individuals formalizes an executive structure that appears to have been developing since 2024, with most appointees having held their respective roles in non-formal capacities for periods ranging from three months to over a year. The combination of internal promotions and external hires suggests Oklo is building a leadership team with both deep institutional knowledge and specialized expertise from adjacent industries relevant to nuclear technology development and deployment.