Form 4: Oklo COO Sells 840,000 Shares Under 10b5-1 Plan

Oklo Inc.'s Co-Founder and COO, Caroline Cochran, reported the sale of 840,000 Class A Common Stock shares on December 22, 2025, through pre-arranged 10b5-1 plans.

Summary

• Caroline Cochran, Co-Founder, COO, Director, and 10% Owner of Oklo Inc., reported sales of Class A Common Stock.
• A total of 840,000 shares were sold on December 22, 2025.
• These sales were executed pursuant to Rule 10b5-1 plans adopted on March 31, 2025.
• The sales occurred across multiple transactions at weighted average prices ranging from $80.8378 to $85.7025 per share.
• The shares were sold from holdings indirectly owned through Caroline Cochran GRAT and Jacob DeWitte GRAT.
• Following these transactions, Caroline Cochran's beneficial ownership includes 9,502,108 shares held directly, 9,780,098 shares indirectly held by Jacob DeWitte, 1,580,000 shares indirectly held by Caroline Cochran GRAT, and 1,580,000 shares indirectly held by Jacob DeWitte GRAT.

Sentiment

Score: 4

Explanation: The sale of a significant number of shares by a key insider, even under a 10b5-1 plan, generally carries a slightly negative sentiment as it can be interpreted as a lack of confidence or a move to diversify away from the company. However, the pre-planned nature mitigates some of the immediate negative impact.

Positives

• The sales were conducted under a pre-arranged Rule 10b5-1 plan, indicating a planned disposition rather than an immediate reaction to market conditions.

Negatives

• Significant insider selling by a key executive (Co-Founder, COO, Director, 10% Owner) could be perceived negatively by investors, potentially signaling a lack of confidence or a desire to diversify holdings.
• The sales represent a substantial number of shares (840,000).

Risks

• Investor perception risk due to significant insider selling.
• Potential for downward pressure on stock price if the market interprets the sales negatively.

Future Outlook

The filing does not contain specific forward-looking statements or guidance regarding the company's future performance or strategic direction. It solely reports insider trading activity.

Industry Context

Insider selling by a co-founder and COO in the nuclear energy sector, particularly for a company like Oklo focused on advanced fission, could be viewed with scrutiny. While 10b5-1 plans are common for diversification and liquidity, significant sales by key personnel can sometimes raise questions about internal outlook, especially in a capital-intensive and long-development-cycle industry.

Comparison to Industry Standards

• Insider sales under 10b5-1 plans are a standard practice for executives to manage personal finances and diversify holdings while complying with insider trading regulations.
• The volume of shares sold by a co-founder and COO is notable, but without context on the executive's total holdings or the company's overall market capitalization, it is difficult to assess its relative significance compared to similar transactions at other advanced nuclear or energy technology companies like TerraPower or NuScale Power (SMR).

Related Party Transactions

• Sales of Class A Common Stock from Caroline Cochran GRAT and Jacob DeWitte GRAT, both of which are indirectly beneficially owned by the reporting person and her spouse, respectively.

Stakeholder Impact

• Shareholders may interpret the insider selling as a negative signal, potentially leading to decreased investor confidence or downward pressure on the stock price.
• Employees may observe the executive's actions, but direct impact is unlikely unless it signals broader company issues.

Next Steps

• The filing does not mention any specific future actions, events, or milestones for the company. It is a historical report of a transaction.

Key Dates

Recommendation

While significant insider selling by a co-founder and COO can be a negative signal, the transactions were executed under a pre-arranged 10b5-1 plan, which suggests a planned diversification or liquidity event rather than an immediate reaction to adverse company news. Without additional context on the company's operational performance, strategic outlook, or the executive's remaining holdings relative to their overall wealth, a 'hold' recommendation is prudent. Investors should monitor future filings and company announcements for further insights into Oklo's trajectory.

Keywords

Oklo Inc., OKLO, Caroline Cochran, Insider Selling, Form 4, 10b5-1 Plan, Class A Common Stock, Executive Stock Sale, Nuclear Energy