Ownership Submission
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 OF SECURITIES

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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Shacham Sharon
  2. Issuer Name and Ticker or Trading Symbol
Karyopharm Therapeutics Inc. [KPTI]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President & CSO
(Last)
(First)
(Middle)
C/O KARYOPHARM THERAPEUTICS INC., 85 WELLS AVENUE
3. Date of Earliest Transaction (Month/Day/Year)
04/09/2018
(Street)

NEWTON, MA 02459
4. If Amendment, Date Original Filed(Month/Day/Year)
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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 04/09/2018   M(1)   10,000 A $ 0.264 723,510 D  
Common Stock 04/09/2018   S(1)   10,000 D $ 12.4829 (2) 713,510 D  
Common Stock               512,143 I By Spouse
Common Stock               47,309 I By GRAT (3)
Common Stock               47,309 I By Spouse's GRAT (4)

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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 (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 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
(Month/Day/Year)
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
Stock Option (right to buy) $ 0.264 04/09/2018   M(1)     10,000   (5) 12/15/2021 Common Stock 10,000 $ 0 19,697 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Shacham Sharon
C/O KARYOPHARM THERAPEUTICS INC.
85 WELLS AVENUE
NEWTON, MA 02459
      President & CSO  

Signatures

 /s/ Christopher B. Primiano, Attorney-in-Fact for Sharon Shacham   04/10/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
(2) Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $12.20 to $12.64, inclusive. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
(3) These shares are held by the Sharon Shacham 2016 Qualified Annuity Interest Trust.
(4) These shares are held by the Michael G. Kauffman 2016 Qualified Annuity Interest Trust.
(5) This option, representing a right to purchase a specified number of shares, vested as to 25% of the shares on December 14, 2012, and the remaining 75% vested in 36 equal monthly installments thereafter.

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