Washington, D.C. 20549 FORM 10-Q/A For the quarterly period ended March 31, 2026 OR Commission file number 001-40583 Oklo Inc. Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submittedpursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the ExchangeAct).YesNo The registrant had 173,990,987 shares of Class A common stock outstanding as of May7, 2026. EXPLANATORY NOTE The sole purpose of this Amendment No. 1 on Form 10-Q/A is to amend the certification filed as Exhibit 31.2 to the Quarterly Reporton Form 10-Q of Oklo Inc. (the "Company") for the quarterly period ended March 31, 2026, filed with the U.S. Securities andExchange Commission on May 12, 2026 (the "Original Filing") to correct the inadvertent omission of the conformed signature of the Other than set forth above, this Amendment No. 1 does not modify, amend or update in any way the financial or other informationcontained in the Original Filing, nor does this Amendment No. 1 reflect events that may have occurred after the Original Filing. TABLE OF CONTENTS SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS This Quarterly Report on Form 10-Q (this “Quarterly Report”) of Oklo Inc. (“Oklo,” the “Company,” “we,” “our,” and “us”) containscertain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “SecuritiesAct”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Forward-looking statements relateto future events or future performance and include, without limitation, statements concerning our business strategy, future revenues,market growth, capital requirements, product introductions, expansion plans and the adequacy of our funding. Other statements We caution investors that any forward-looking statements presented in this Quarterly Report, or that we may make orally or in writingfrom time to time, are based on information currently available, as well as our beliefs and assumptions. The actual outcome related toforward-looking statements will be affected by known and unknown risks, trends, uncertainties, and factors that are beyond our controlor ability to predict. Although we believe that our assumptions are reasonable, they are not guarantees of future performance, and somewill inevitably prove to be incorrect. As a result, our actual future results can be expected to differ from our expectations, and those The forward-looking statements contained in this Quarterly Report are based on current expectations and beliefs concerning futuredevelopments and their potential effects on us. There can be no assurance that future developments affecting us will be those that wehave anticipated. Forward-looking statements, by their nature, are subject to a variety of assumptions, risks, and uncertainties thatcould cause actual results or performance to differ materially from the results projected. Many of these risks and uncertainties cannotbe controlled by us. Factors that may cause our actual decisions or results to differ materially from those contemplated by theseforward-looking statements include, among other things: risks related to the development and deployment of Oklo’s powerhouses, fuelfabrication and fuel recycling facilities, and radioisotope production activities; the risk that Oklo is pursuing an emerging market withno commercial project operating and regulatory uncertainties; risks related to acquisitions, divestitures, or joint ventures we mayengage in; the need for financing to construct plants, which remain subject to market, financial, political, and legal conditions; risksrelated to an inability to raise additional capital to support our business and sustain our growth on favorable terms; the effects ofcompetition; risks related to accessing high-assay low-enriched uranium (“HALEU”), plutonium, and other fuels (including recycled This Quarterly Report and all subsequent written and oral forward-looking statements attributable to us or any person acting on ourbehalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this section. We undertake no Oklo Inc.Condensed Consolidated