Trade Summary

3 days ago, Rajavelu Esther, serving as See Remarks at Spero Therapeutics, Inc. (SPRO), sold 25,240 shares at $2.51 per share, for a total transaction value of $63,352.00. Following this transaction, Rajavelu Esther now holds 986,851 shares of SPRO.

This sale represents a 2.00% decrease in Rajavelu Esther's stake in the company. This is considered a medium-conviction trade.

The trade was executed on Monday, May 4, 2026 and publicly disclosed via SEC Form 4 filing on Wednesday, May 6, 2026, 2 days after the trade was made.

Spero Therapeutics, Inc. operates in the HEALTHCARE sector, specifically within the BIOTECHNOLOGY industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.