Certain Stock Options of SpringWorks Therapeutics, Inc. are subject to a Lock-Up Agreement Ending on 6-JAN-2021. These Stock Options will be under lockup for 91 days starting from 7-OCT-2020 to 6-JAN-2021. Details: The directors, executive officers, and certain affiliated security holders have entered into lock-up agreements with the underwriters prior to the commencement of this offering pursuant to which each of these persons or entities, with limited exceptions, for a period of 90 days after the date of the prospectus supplement.