0000899243-20-034477.txt : 20201218 0000899243-20-034477.hdr.sgml : 20201218 20201218161508 ACCESSION NUMBER: 0000899243-20-034477 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20201216 FILED AS OF DATE: 20201218 DATE AS OF CHANGE: 20201218 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Larkin Cristina CENTRAL INDEX KEY: 0001721173 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38266 FILM NUMBER: 201400774 MAIL ADDRESS: STREET 1: C/O SPERO THERAPEUTICS, INC. STREET 2: 675 MASSACHUSETTS AVENUE, 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 2020-12-16 0 0001701108 Spero Therapeutics, Inc. SPRO 0001721173 Larkin Cristina C/O SPERO THERAPEUTICS, INC. 675 MASSACHUSETTS AVENUE, 14TH FLOOR CAMBRIDGE MA 02139 0 1 0 0 Chief Operating Officer Common Stock 2020-12-16 4 M 0 12000 5.90 A 13500 D Common Stock 2020-12-16 4 S 0 12000 19.00 D 1500 D Stock Option (Right to Buy) 5.90 2020-12-16 4 M 0 12000 0.00 D 2027-07-05 Common Stock 12000 8434 D All transactions reported on this Form 4 were made pursuant to a previously adopted Rule 10b5-1 trading plan. Specifically, the transactions reported herein relate to option exercises and related sales (totaling 12,000 shares). All shares underlying this option were fully vested as of March 7, 2020. /s/ Cristina Larkin 2020-12-18