A cluster of large insider stock sales surfaced across unrelated companies. Medpace CEO August Troendle sold $27.4 million in company stock, Datadog CTO Alexis Le-Quoc sold $10.9 million, and Reddit's CEO sold more than 17,000 shares worth $2.8 million. Reddit's sale came after the stock has fallen 39% over the past year.

Insider sales alone don't necessarily signal trouble — executives often sell for tax planning, diversification or scheduled trading plans — but the size and timing of these three together are notable. Reddit's sale in particular stands out because it follows a steep decline in the shares rather than a rally, which is a less common pattern for insider selling.

Not every signal points the same way: Skillsoft's CEO bought $66,414 of shares in the same window, a much smaller but opposite-direction bet. What isn't disclosed is whether any of these sales were pre-scheduled under 10b5-1 trading plans, which would soften the read that executives are turning cautious on their own companies.