Oklo

Item 1.01. Entry into a Material Definitive Agreement. On September 11, 2026, Oklo Inc. (the Company ) entered into an equity distribution agreement (the Sales Agreement ) with Goldman Sachs & Co. LLC, BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, Barclays Capital Inc., Cantor Fitzgerald & Co., Guggenheim Securities, LLC, Canaccord Genuity LLC and B. Riley Securities, Inc. under which the Company may offer and sell, from time to time in its sole discretion, shares of the Company s Class A common stock, par value $0.0001 per share (the Common Stock ), with aggregate gross sales proceeds of up to $1,000,000,000 through an at the market equity offering program under which Goldman Sachs & Co. LLC, BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, Barclays Capital Inc., Cantor Fitzgerald & Co., Guggenheim Securities, LLC, Canaccord Genuity LLC and B. Riley Securities, Inc. will act as the agents (each, a Sales Agent and collectively, the Sales Agents ). Sales, if any, of Common Stock under the Sales Agreement may be made in ordinary brokers transactions, to or through a market maker, on or through the New York Stock Exchange or any other market venue where the securities may be traded, in the over-the-counter market, in privately negotiated transactions, in block trades, in transactions that are deemed to be at the market offerings as defined in Rule 415(a)(4) under the Securities Act or through a combination of any such methods of sale. The Sales Agents may also sell Common Stock by any other method permitted by law. The securities may be sold at market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. The Company will designate the maximum amount of Common Stock to be sold through the Sales Agents on a daily basis or otherwise as the Company and the Sales Agents agree and the minimum price per share at which such Common Stock may be sold. Subject to the terms and conditions of the Sales Agreement, the Sales Agents will use their reasonable efforts consistent with their normal sales and trading practices to sell on the Company s behalf all of the designated shares of Common Stock. The Company may instruct the Sales Agents not to sell any Common Stock if the sales cannot be effected at or above the price designated by the Company in any such instruction. The Company or any of the Sales Agents may suspend the offering of Common Stock by notifying the other party. The Sales Agreement provides that the Company will pay the Sales Agents a commission of up to 1.5% of the gross sales price per share of Common Stock sold through such Sales Agents under the Sales Agreement, and the Company will reimburse the Sales Agents for certain expenses incurred in connection with their services under the Sales Agreement. The offering of Common Stock pursuant to the Sales Agreement will terminate upon the termination of the Sales Agreement by the Company or by the Sales Agents, as provided therein. The Sales Agreement contains representations and warranties and covenants that are customary for transactions of this type. In addition, the Company has agreed to indemnify the Sales Agents against certain liabilities on customary terms, subject to limitations on such arrangements imposed by applicable law and regulation. In the ordinary course of its business, the Sales Agents and their affiliates have engaged in, and may engage in the future engage in, investment banking and other commercial dealings in the ordinary course of business with the Company and its affiliates. The Sales Agents have received, or may in the future receive, customary fees and commissions for these transactions. The shares will be issued pursuant to the Company s shelf registration statement on Form S-3 (File No. 333-291157) as subsequently amended by that Amendment No. 1 to Form S-3, which was declared effective by the Securities and Exchange Commission (the SEC ) on December 4, 2025 (the Shelf Registration Statement ). The Company intends to file a prospectus supplement, dated September 11, 2026, with the SEC in connection with the offer and sale of the shares pursuant to the Sales Agreement. The foregoing description of the Sales Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Sales Agreement. A copy of the Sales Agreement is filed with this Current Report on Form 8-K as Exhibit 1.1 and is incorporated herein by reference. 1 A copy of the legal opinion of Orrick, Herrington & Sutcliffe LLP, relating to the validity of the shares of Common Stock that may be sold pursuant to the Sales Agreement, is filed with this Current Report on Form 8-K as Exhibit 5.1. This Current Report on Form 8-K shall not constitute an offer to sell or the solicitation of any offer to buy the securities discussed herein, nor shall there be any offer, solicitation or sale of the securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

Item 1.02. Termination of Material Definitive Agreement. On September 10, 2026, the Company delivered written notice of its intention to terminate the Equity Distribution Agreement, dated as of May 13, 2026 (the Prior Sales Agreement ), by and among the Company and each of Goldman Sachs & Co. LLC, BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, Barclays Capital Inc., Cantor Fitzgerald & Co., Guggenheim Securities, LLC, Canaccord Genuity LLC and William Blair & Company, L.L.C. (collectively, the Prior Sales Agents ). The termination of the Prior Sales Agreement was effective as of the close of business on September 10, 2026. As previously reported, pursuant to the terms of the Prior Sales Agreement and the related prospectus supplement filed with the SEC on May 13, 2026, the Company could offer and sell shares of its Common Stock having an aggregate offering price of up to $1,000,000,000, from time to time through the Prior Sales Agents. The Company is not subject to any termination penalties related to the termination of the Prior Sales Agreement. The Company sold 17,971,448 shares of its Common Stock for gross proceeds of approximately $1,000,000,000 pursuant to the Prior Sales Agreement through the termination date of such Prior Sales Agreement. The Company will not make any further sales of shares of its Common Stock under the Prior Sales Agreement and the related prospectus supplement.

Item 9.01 Financial Statements and Exhibits (d) Exhibits. The following exhibits are included in this report: No. Description 1.1 Equity Distribution Agreement, dated as of September 11, 2026, by and among the Company and Goldman Sachs & Co. LLC, BofA Securities, Inc., Citigroup Global Markets Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, Barclays Capital Inc., Cantor Fitzgerald & Co., Guggenheim Securities, LLC, Canaccord Genuity LLC and B. Riley Securities, Inc. 5.1 Opinion of Orrick, Herrington & Sutcliffe LLP. 23.1 Consent of Orrick, Herrington & Sutcliffe LLP (included in Exhibit 5.1). 104 Cover Page Interactive Data File (formatted in iXBRL) 2 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Oklo Inc. Dated: September 11, 2026 /s/ R. Craig Bealmear R. Craig Bealmear Chief Financial Officer 3