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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1503802	Karyopharm Therapeutics Inc.	KPTI	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1364719	Michael Kauffman	C/O Karyopharm Therapeutics Inc. 85 Wells Avenue Newton MA 02459	Chief Executive Officer	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2017-12-18	10,000	$0.26	522,143	No	4	M	Direct
Common Stock	Disposition	2017-12-18	10,000	$9.16	512,143	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (right to buy)	Disposition	2017-12-18	10,000	$0.00	10,000	$0.26

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
32,424		2021-12-13	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	713,510	Indirect	By Spouse
Common Stock	47,309	Indirect	By GRAT
Common Stock	47,309	Indirect	By Spouse's GRAT

Footnotes

These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
Represents the weighted average sale price. These shares were sold in multiple transactions at prices ranging from $9.0501 to $9.3500, 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.
These shares are held by the Michael G. Kauffman 2016 Qualified Annuity Interest Trust.
These shares are held by the Sharon Shacham 2016 Qualified Annuity Interest Trust.
This option, representing a right to purchase a specified number of shares, vested as to 25% of the shares on December 12, 2012, and the remaining 75% vested in 36 equal monthly installments thereafter.