Oklo Inc. Class A common stock (OKLO)
OKLO moved a median of -0.18% 30 minutes after news, and -0.28% by the close. How OKLO actually reacts to news — the realized, point-in-time move the market made, measured across 448 labeled events over the last three years with zero look-ahead.
OKLO’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 49% | 444 |
| 30-min | -0.18% | 47% | 445 |
| 60-min | -0.09% | 49% | 445 |
| to close | -0.28% | 45% | 439 |
| Middle 50% of OKLO reactions | -1.86% to +1.52% |
|---|---|
| Median reaction (30-min) | -0.18% |
| Measured reactions | 448 |
Half of all Oklo Inc. Class A common stock news events land between -1.86% and +1.52% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How OKLO reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 26 | -2.71% | 12% | -2.32% |
| Analyst downgrades | 12 | -2.22% | 25% | -3.56% |
| Coverage initiations | 73 | +0.33% | 55% | +0.42% |
| Rating reiterations | 62 | -0.38% | 39% | -0.91% |
| Price-target cuts | 11 | -1.06% | 36% | -4.22% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 1 further class was observed with fewer than 10 measured events and is not published. See how OKLO ranks against every other measured name →
That’s how OKLO usually reacts — get an email when it moves on news →Email me when OKLO moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to OKLO's baseline. Nothing else.
Recent OKLO events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Oklo to Advance Groves 2 Forge as Part of U.S. Department of Energy’s Nuclear Energy Launch Pad Selection | Press release | Business Wire | -1.11% | +1.08% | |
| Form 8-K Oklo Inc. For: Sep 10 | SEC filing · Form 8-K | SEC EDGAR | -2.27% | -6.41% | |
| Form 10-Q Oklo Inc. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +1.08% | +9.05% | |
| Oklo Publishes Second Quarter 2026 Financial Results and Business Update | Press release | Business Wire | +1.08% | +9.05% | |
| Oklo's Groves Reactor Achieves First Criticality in Under a Year | Press release | Business Wire | -1.23% | -1.91% | |
| Form 8-K Oklo Inc. For: Jul 22 | SEC filing · Form 8-K | SEC EDGAR | +0.90% | -5.51% | |
| Oklo Announces Date for Second Quarter 2026 Financial Results and Business Update Call | Press release | Business Wire | +2.19% | +2.40% | |
| Oklo Receives U.S. Department of Energy Startup Authorization for Groves Reactor, Clearing Way for Fuel Loading and First Criticality | Press release | Business Wire | -2.03% | -7.68% | |
| U.S. Department of Energy Approves Final Safety Analysis for Oklo's Groves Isotope Test Reactor, Advancing the Project Toward Operational Authorization | Press release | Business Wire | -1.98% | -2.20% | |
| Oklo Acquires Creative Engineers to Strengthen Sodium, Alkali-Metal Capabilities | Press release | Business Wire | -1.16% | -0.95% | |
| Form S-8 Oklo Inc. | SEC filing · Form S-8 | SEC EDGAR | -2.58% | -8.26% | |
| Oklo, Centrus Sign Letter of Intent to Purchase Nuclear Fuel for Aurora Powerhouse Deployment in Southern Ohio | Press release | Business Wire | -0.86% | +1.27% | |
| Form 10-Q/A Oklo Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +1.64% | +3.19% | |
| Oklo and Standard Nuclear Form Strategic Alliance to Strengthen Advanced Nuclear Fuel Supply Chain | Press release | Business Wire | +2.27% | -4.15% | |
| U.S. Department of Energy Approves Preliminary Documented Safety Analysis for Aurora Powerhouse at Idaho National Laboratory | Press release | Business Wire | +3.61% | +8.31% | |
| Form 8-K Oklo Inc. For: Jun 03 | SEC filing · Form 8-K | SEC EDGAR | -0.22% | -3.58% | |
| Oklo Acquires ARMEC to Expand Vertically Integrated Manufacturing Capabilities for Advanced Reactor and Fuel-Manufacturing Programs | Press release | Business Wire | -2.36% | -1.95% | |
| Oklo Selected by U.S. Department of Energy for Advanced Negotiations Under Surplus Plutonium Utilization Program | Press release | Business Wire | -0.48% | -5.04% | |
| Form 8-K Oklo Inc. For: May 13 | SEC filing · Form 8-K | SEC EDGAR | -0.47% | +1.83% | |
| Form 10-Q Oklo Inc. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -0.64% | -4.64% | |
| Oklo and Idaho National Laboratory to Employ AI-Enabled Reactor Design for Advanced Nuclear Systems | Press release | Business Wire | +0.57% | -2.30% | |
| Oklo Publishes First Quarter 2026 Financial Results and Business Update | Press release | Business Wire | -0.64% | -4.64% | |
| Oklo’s NRC Principal Design Criteria Topical Report Approved for Aurora Powerhouse in Idaho | Press release | Business Wire | +2.31% | +12.14% | |
| Form ARS Oklo Inc. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -2.63% | -0.73% | |
| Oklo Announces Date for First Quarter 2026 Financial Results and Business Update Call | Press release | Business Wire | -2.86% | -6.76% | |
| Oklo, NVIDIA, and Los Alamos National Laboratory Collaborate to Advance Nuclear Fuel Validation at Los Alamos in Support of Nuclear-Powered AI Factories | Press release | Business Wire | +1.45% | -0.70% | |
| Form DEF 14A Oklo Inc. For: Dec 31 | SEC filing · Form DEF | SEC EDGAR | +2.00% | +11.68% | |
| Form 8-K Oklo Inc. For: Apr 10 | SEC filing · Form 8-K | SEC EDGAR | -0.21% | +1.85% | |
| Oklo Announces Changes to its Board of Directors and Management Team to Support its Continued Growth | Press release | Business Wire | -0.21% | +1.85% | |
| Oklo, Blykalla to Expand Strategic Partnership Through U.S. Investment and Collaboration | Press release | Business Wire | +1.01% | -10.63% | |
| Oklo Co-Founder and CEO Appointed to Serve on President’s Council of Advisors on Science and Technology | Press release | Business Wire | +0.13% | -3.36% | |
| Nuclear Waste Innovator Deep Isolation Further Validates Borehole Technology for Safe Disposal of Recycled Fuel Waste | Press release | GlobeNewswire | +0.81% | -0.42% | |
| Form 10-K Oklo Inc. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.72% | -6.71% | |
| Oklo Announces U.S. Department of Energy Approval for Nuclear Safety Design Agreement of Aurora Powerhouse at Idaho National Laboratory | Press release | Business Wire | -0.15% | -6.42% | |
| Oklo Publishes Full-Year 2025 Financial Results and Business Update | Press release | Business Wire | -0.72% | -6.71% | |
| Oklo’s Atomic Alchemy Announces U.S. Department of Energy Approval for Nuclear Safety Design Agreement of its Groves Isotopes Test Reactor | Press release | Business Wire | -0.72% | -6.71% | |
| Oklo’s Atomic Alchemy Granted U.S. Nuclear Regulatory Commission License for Isotope Material | Press release | Business Wire | -0.15% | -6.42% | |
| Oklo, Centrus Announce Planned Joint Venture to Advance Nuclear Fuel Services in Ohio | Press release | Business Wire | +1.35% | +8.21% | |
| Oklo Announces Date for Full Year 2025 Financial Results and Business Update Call | Press release | Business Wire | +0.82% | +2.10% | |
| Oklo, Meta Announce Agreement in Support of 1.2 GW Nuclear Energy Development in Southern Ohio | Press release | Business Wire | -3.64% | -6.97% | |
| Oklo and DOE Partner to Deploy Radioisotope Pilot Facility Supporting Cancer Care and U.S. Medical Supply Chains | Press release | Business Wire | +2.47% | +4.04% | |
| THE RESILIENCE STACK: 5 Assets Fixing the AI Bottleneck | Press release | GlobeNewswire | -1.33% | -0.77% | |
| Oklo and Los Alamos National Lab Conduct Fast Spectrum Plutonium Criticality Experiment | Press release | Business Wire | +0.53% | -9.91% | |
| U.S. Department of Energy Approves Preliminary Documented Safety Analysis of Oklo’s Aurora Fuel Fabrication Facility as Assembly Begins at Idaho National Laboratory | Press release | Business Wire | +3.59% | +3.48% | |
| Form EFFECT Oklo Inc. | SEC filing · Form EFFECT | SEC EDGAR | -1.97% | -2.09% | |
| Form 8-K Oklo Inc. For: Dec 04 | SEC filing · Form 8-K | SEC EDGAR | -1.97% | -2.09% | |
| Defiance ETFs Launches OKLS: The First 2X Short ETF of Oklo Inc. | Press release | GlobeNewswire | -0.41% | +0.82% | |
| Oklo and Siemens Energy Sign Binding Contract to Expedite Procurement of the Power Conversion System for Commercial Power Plant | Press release | Business Wire | +1.68% | +3.38% | |
| Form 10-Q Oklo Inc. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.76% | +2.37% | |
| Oklo Announces U.S. Department of Energy Approval for Nuclear Safety Design Agreement of Aurora Fuel Fabrication Facility | Press release | Business Wire | +1.34% | -4.10% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the OKLO section they belong to.
Where else OKLO is measured.
OKLO earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Oklo Inc. Class A common stock's median reaction calculated?
Every labeled OKLO news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 448 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 47% of OKLO's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does OKLO's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.