Sec Form 4 Filing - Islam Saqib @ SpringWorks Therapeutics, Inc. - 2023-11-30

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Islam Saqib 2. Issuer Name and Ticker or Trading Symbol SpringWorks Therapeutics, Inc. [ SWTX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) C/O SPRINGWORKS THERAPEUTICS, INC., 100 WASHINGTON BLVD. 3. Date of Earliest Transaction (MM/DD/YY) 11/30/2023 (Street) STAMFORD, CT06902 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock ( 1 ) ( 2 ) 11/30/2023 A( 1 )( 2 ) 199,053 A $ 0 199,053 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Of ficer Other Islam Saqib C/O SPRINGWORKS THERAPEUTICS, INC. 100 WASHINGTON BLVD. STAMFORD, CT06902 X Chief Executive Officer Signatures /s/ Francis I. Perier, Jr. as Attorney-in Fact 12/01/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This transaction represents the grant of performance restricted stock units ("PSUs"). Each PSU represents a contingent right to receive one share of the Issuer's Common Stock upon vesting. The PSUs were originally granted on January 5, 2023, subject to the achievement of a certain performance based milestone within four years from the grant date, which milestone was achieved as a result of approval by the U.S. Food and Drug Administration of the Issuer's lead product candidate, Ogsiveo, for the treatment of desmoid tumors. ( 2 )66,351 PSUs shall vest on the date that is 15 months following November 30, 2023, another 66,351 PSUs shall vest on the date that is 27 months following November 30, 2023 and the remaining 66,351 PSUs shall vest on the date that is the later of (i) 39 months following November 30, 2023 or (ii) the Measurement Period End Date (as defined below), subject to continued service to the Issuer by the Reporting Person as of each such vesting date; provided that, such remaining 66,351 PSUs shall be subject to an upwards or downwards adjustment described in the PSU award agreement. As used herein, "Measurement Period End Date" means the first to occur of (i) December 31, 2026 or (ii) the date of consummation of a Sale Event (as defined in Issuer's 2019 Stock Option and Equity Incentive Plan).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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