Form 4: Datadog Director Converts, Sells Shares Under 10b5-1 Plan

Datadog Director Michael James Callahan converted Class B shares to Class A and subsequently sold a portion of his Class A holdings under a pre-arranged 10b5-1 plan.

Summary

• Michael James Callahan, a Director at Datadog, Inc. (DDOG), reported transactions on November 6, 2025.
• He converted 12,500 shares of Class B Common Stock into 12,500 shares of Class A Common Stock at a price of $0.
• Following the conversion, he sold 12,500 shares of Class A Common Stock at an average price of $187.47 per share.
• These sales were executed pursuant to a Rule 10b5-1 trading plan established on December 12, 2024.
• After these transactions, Callahan indirectly holds 12,496 shares of Class A Common Stock through The Callahan-Thernstrom Family Trust and directly holds 19,612 shares of Class A Common Stock.
• Each Class B Common Stock share is convertible at any time into one Class A Common Stock share and has no expiration date, with automatic conversion triggers including certain transfers, the reporting person's death, or the tenth anniversary of the Issuer's initial public offering.

Sentiment

Score: 5

Explanation: The sentiment is neutral. While insider selling can sometimes be viewed negatively, the execution under a pre-arranged 10b5-1 plan mitigates concerns about the timing being based on new, adverse information. It represents a planned divestment rather than an immediate reaction.

Positives

• The sale was conducted under a pre-arranged 10b5-1 plan, indicating a planned divestment rather than an immediate reaction to new, non-public information.

Negatives

• Insider selling, even under a 10b5-1 plan, can sometimes be perceived negatively by the market as it reduces the insider's direct equity stake in the company.

Future Outlook

This filing is a transaction report and does not contain any forward-looking statements or guidance regarding the company's future performance or outlook.

Industry Context

This insider transaction is specific to Datadog and its director, Michael James Callahan, and does not directly provide broader industry trends or competitive insights. However, insider activity is a common data point monitored by investors across all industries.

Related Party Transactions

• The shares are held indirectly by The Callahan-Thernstrom Family Trust, of which the Reporting Person, Michael James Callahan, is Trustee. This constitutes a related party holding.

Stakeholder Impact

• Shareholders may note a reduction in direct insider ownership, which could slightly influence market sentiment, though the planned nature of the sale under a 10b5-1 plan typically lessens any negative interpretation.

Key Dates

Recommendation

A single Form 4 filing detailing a planned insider sale does not typically provide sufficient information to alter a long-term investment thesis. Investors should consider the broader company fundamentals, financial performance, and market conditions rather than basing decisions solely on this routine insider transaction.

Keywords

Datadog, DDOG, insider trading, Form 4, stock sale, director, Michael James Callahan, 10b5-1 plan, Class A Common Stock, Class B Common Stock