Ankit Mahadevia - 28 Aug 2025 Form 4 Insider Report for Spero Therapeutics, Inc. (SPRO)

Reporting relationship: Director
Issuer ticker: SPRO
Reported as of: 28 Aug 2025
Net transaction value: -$12,947
SEC form: 4
Accepted by SEC: 03 Sep 2025, 06:04:03 UTC
Prior SEC filing: 16 Jun 2025
Source filing: View source filing
Reporting owner signature: /s/ Maegan Deare, Attorney-in-Fact for Ankit Mahadevia

Key filing fact

Ankit Mahadevia filed Form 4 for Spero Therapeutics, Inc. (SPRO) on 03 Sep 2025.

Key facts

This page summarizes Ankit Mahadevia's Form 4 filing for Spero Therapeutics, Inc. (SPRO).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 03 Sep 2025, 06:04.

Change

Previous filing in this sequence was filed on 16 Jun 2025.
Current net transaction value: -$12,947.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001720974 Primary reporting owner

Mahadevia Ankit

Relationship: Director
Address: C/O SPERO THERAPEUTICS, INC., 675 MASSACHUSETTS AVENUE, 14TH FLOOR, CAMBRIDGE
Signature: /s/ Maegan Deare, Attorney-in-Fact for Ankit Mahadevia
Signature date: 02 Sep 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SPRO transaction

Common Stock

Sale

Transaction value: $12,947
Shares: -6,572
Change %: -0.93%
Price: $1.97
Shares after: 703,294
Date: 28 Aug 2025
Ownership: Direct
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

The reported transaction is a sale of common stock effected to cover tax withholding obligations pursuant to a "sell to cover" provision included in each RSU Agreement in connection with the vesting of restricted stock unit ("RSUs") that were granted to the Reporting Person on August 26, 2021.

Footnote F2

Amount includes 65,817 shares of common stock held by the Mahadevia-Mehta Family Trust, of which the Reporting Person is a trustee.