0000899243-21-004782.txt : 20210203 0000899243-21-004782.hdr.sgml : 20210203 20210203194417 ACCESSION NUMBER: 0000899243-21-004782 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210201 FILED AS OF DATE: 20210203 DATE AS OF CHANGE: 20210203 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Melnick David A. CENTRAL INDEX KEY: 0001726485 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38266 FILM NUMBER: 21588186 MAIL ADDRESS: STREET 1: C/O SPERO THERAPEUTICS, INC. STREET 2: 675 MASSACHUSETTS AVE., 14TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02139 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 doc4.xml FORM 4 SUBMISSION X0306 4 2021-02-01 0 0001701108 Spero Therapeutics, Inc. SPRO 0001726485 Melnick David A. C/O SPERO THERAPEUTICS, INC. 675 MASSACHUSETTS AVENUE, 14TH FLOOR CAMBRIDGE MA 02139 0 1 0 0 Chief Medical Officer Stock Option (Right to Buy) 19.18 2021-02-01 4 A 0 57432 0.00 A 2031-02-01 Common Stock 57432 57432 D The shares underlying this option vest as to 25% on February 1, 2022, with the remainder vesting in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service through the applicable vesting date. /s/ David A. Melnick 2021-02-03