$Spero Therapeutics, Inc.(SPRO)$ 8-K - Current report Filed: 2017-11-06 AccNo: 0001193125-17-334318 Size: 196 KBItem 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain OfficersItem 5.03: Amendments to Articles of Inco 网页链接