Rajavelu Esther - Insider Non-Derivative Transactions at Spero Therapeutics, Inc. (SPRO) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Nov 7, 2025, Rajavelu Esther's relationship to Spero Therapeutics, Inc. (SPRO) is Officer (See Remarks), and currently has 869,450 shares of Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other SPRO insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Rajavelu Esther - Insider Non-Derivative Transactions of SPRO Common Stock

Rajavelu Esther - Insider Non-Derivative Transactions at SPRO

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Nov 8, 2025	Sell -- (Common Stock)	40270	2.37	869450
May 3, 2025	Acquisition -- (Common Stock)	185000	0	909720
Feb 6, 2025	Sell -- (Common Stock)	20689	0.78	724720
Feb 4, 2025	Acquisition -- (Common Stock)	266139	0	645409
Feb 4, 2025	Acquisition -- (Common Stock)	100000	0	745409
Nov 9, 2024	Sell -- (Common Stock)	17245	1.3	379270
Nov 8, 2024	Sell -- (Common Stock)	23351	1.31	396515
Feb 2, 2024	Acquisition -- (Common Stock)	119866	0	419866
Nov 14, 2023	Acquisition -- (Common Stock)	300000	0	300000