Oklo (OKLO) Stock After Hours on Dec. 24, 2025: Insider Selling, Nuclear Catalysts, and What to Know Before the Next Market Open

Oklo Inc. is back in the spotlight on December 17, 2025, with its share price sliding even as the company highlighted fresh technical progress tied to advanced nuclear fuels and fast-reactor development.

Oklo Inc. is starting the week with a fresh reminder of just how volatile the market’s “next-gen nuclear for AI data centers” trade can be. After a sharp selloff late last week, OKLO shares extended their pullback on Monday, December 15, 2025, as investors weighed dilution risk, a long runway to revenue, and a growing stack of regulatory and execution milestones.

December 15, 2025 — Oklo Inc. is starting the week with investors trying to separate two very different stories that have become tangled together: the long, regulated march toward advanced nuclear deployment, and the short, adrenaline-fueled “AI infrastructure” trade that just took a hit.

Oklo Inc. heads into Monday’s session after another headline-heavy stretch that underscored why the advanced nuclear name has become one of the market’s most polarizing “AI power” trades. Investors have been weighing rapid progress signals—federal program participation, supply-chain deals, and fresh analyst coverage—against the two issues that tend to hit early-stage infrastructure plays hardest: dilution risk and long regulatory timelines.

Oklo Inc. is ending the week at the center of a familiar high-volatility trade: advanced nuclear power as a potential solution for AI-era electricity demand—and the equally familiar pushback investors deliver when dilution risk rises.

Oklo Inc. ended the week with a sharp selloff and a renewed debate among investors: is the nuclear “AI power” narrative simply taking a breath, or is Wall Street starting to price in dilution and execution risk more aggressively?

Oklo Inc. ended Friday with one of the sharpest drops among high-beta “AI infrastructure” names, then stabilized modestly in after-hours trading. The move comes as investors reassessed the near-term pace of the AI data-center buildout, a theme that has become tightly linked to Oklo’s long-term “clean baseload for hyperscalers” narrative. Reuters+1

Oklo Inc. has turned into one of 2025’s most explosive energy trades. The advanced nuclear start‑up is still pre‑revenue, but its share price has rocketed more than 400% this year, lifted by hype around small reactors that could power AI data centers, new U.S. government pilot programs, and a wave of analyst coverage.Investorsobserver+2Barron's+2

Below is a deeper look at what all of this means for traders and long‑term investors before the bell on Monday, December 8, 2025.

Oklo Inc. has been one of 2025’s wildest energy stories. The advanced nuclear start‑up has ridden the AI data‑center boom to a gain of more than 400% this year, yet it still has no commercial revenue and remains years away from operating its first reactor. Nasdaq+1

Oklo Inc., the high‑profile advanced nuclear start‑up, is ripping higher again.

Oklo Inc. is back in the spotlight. On December 4, 2025, the fast‑reactor startup’s stock jumped roughly 13% to about $109.62 per share, bouncing from a bruising correction and reigniting the debate over whether OKLO is a generational nuclear opportunity or a textbook speculative bubble. FX Leaders

As of December 2, 2025, Oklo Inc. sits at the center of two of the market’s biggest themes: advanced nuclear power and the surging energy needs of AI data centers. The stock is still up well over 300% year to date, yet has also lost more than half of its value since its autumn peak, making it one of the most volatile names in the utilities and clean‑energy space. StockAnalysis+1