0000950170-23-045441.txt : 20230830 0000950170-23-045441.hdr.sgml : 20230830 20230830162021 ACCESSION NUMBER: 0000950170-23-045441 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230828 FILED AS OF DATE: 20230830 DATE AS OF CHANGE: 20230830 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Shukla Sath CENTRAL INDEX KEY: 0001782817 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38266 FILM NUMBER: 231225488 MAIL ADDRESS: STREET 1: C/O ZIOPHARM ONCOLOGY, INC. STREET 2: ONE FIRST AVENUE, PARRIS BUILDING #34 CITY: BOSTON STATE: MA ZIP: 02129 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Spero Therapeutics, Inc. CENTRAL INDEX KEY: 0001701108 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] 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 2023-08-28 0001701108 Spero Therapeutics, Inc. SPRO 0001782817 Shukla Sath C/O SPERO THERAPEUTICS, INC. 675 MASSACHUSETTS AVENUE, 14TH FLOOR CAMBRIDGE MA 02139 true true false false CEO and President true Common Stock 2023-08-28 4 S false 1854 1.26 D 576663 D Common Stock 2023-08-29 4 S false 4163 1.30 D 572500 D The reported transaction is a sale of common stock effected to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs") that were granted to the Reporting Person on August 26, 2021 pursuant to a "sell to cover" provision included in the RSU Agreement. The reported transaction is a sale of common stock pursuant to a preexisting 10b5-1 plan upon the vesting of RSUs that were granted to the Reporting Person on August 26, 2021. /s/ Tamara Joseph, Attorney-in-Fact for Sath Shukla 2023-08-30