0000950170-24-066659.txt : 20240530 0000950170-24-066659.hdr.sgml : 20240530 20240530162924 ACCESSION NUMBER: 0000950170-24-066659 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240529 FILED AS OF DATE: 20240530 DATE AS OF CHANGE: 20240530 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Deshpande Milind CENTRAL INDEX KEY: 0001378588 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38266 FILM NUMBER: 241005858 MAIL ADDRESS: STREET 1: ACHILLION PHARMACEUTICALS STREET 2: 300 GEORGE STREET CITY: NEW HAVEN STATE: CT ZIP: 06511 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Spero Therapeutics, Inc. CENTRAL INDEX KEY: 0001701108 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 675 MASSACHUSETTS AVENUE STREET 2: 14TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 BUSINESS PHONE: 857-242-1600 MAIL ADDRESS: STREET 1: 675 MASSACHUSETTS AVENUE STREET 2: 14TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 FORMER COMPANY: FORMER CONFORMED NAME: Spero Therapeutics, LLC DATE OF NAME CHANGE: 20170316 4 1 ownership.xml 4 X0508 4 2024-05-29 0001701108 Spero Therapeutics, Inc. SPRO 0001378588 Deshpande Milind C/O SPERO THERAPEUTICS, INC. 675 MASSACHUSETTS AVENUE, 14TH FLOOR CAMBRIDGE MA 02139 true false false false false Common Stock 2024-05-29 4 A false 20000 0.00 A 71454 D Consists of restricted stock units ("RSUs"). Each RSU represents the right to receive one share of common stock upon vesting. The RSUs vest on May 29, 2025, subject to the Reporting Person's continued service through the applicable vesting date. /s/Satyavrat Shukla, Attorney-in-Fact for Milind Deshpande 2024-05-30