Exhibit 99.1

Joint Filer Information

(Other Reporting Persons)

Name:		Marcin Czernik
Address:		Simou Menardou 5 Kifisia Court, Office 225 6015 Larnaca, Cyprus
Designated Filer:		Chione Limited
Issuer & Ticker Symbol:		Karyopharm Therapeutics Inc. [KPTI]
Date of Earliest Transaction Required to Be Reported:		02/25/2019
Relationship of Reporting Persons to Issuer: If Amendment, Date Original Filed (Month/Day/Year): Individual or Joint/Group Filing: Signature and Date:		10% Owner Not Applicable Form filed by More than One Reporting Person Marcin Czernik, by /s/ Simon Prisk, as attorney-in fact by power of attorney 02/27/2019

Name:

Andreas Hadjimichael

Address:

Simou Menardou 5

Kifisia Court, Office 225

6015 Larnaca, Cyprus

Designated Filer:

Chione Limited

Issuer & Ticker Symbol:

Karyopharm Therapeutics Inc. [KPTI]

Date of Earliest Transaction Required to Be Reported:

02/25/2019

Relationship of Reporting Persons to Issuer:

If Amendment, Date Original Filed (Month/Day/Year):

Individual or Joint/Group Filing:

Signature and Date:

10% Owner

Not Applicable

Form filed by More than One Reporting Person

Andreas Hadjimichael, by /s/ Simon Prisk, as attorney-in fact by power of attorney 02/27/2019

Name:		George Hadjimichael

Address:		Simou Menardou 5 Kifisia Court, Office 225 6015 Larnaca, Cyprus

Designated Filer:		Chione Limited

Issuer & Ticker Symbol:		Karyopharm Therapeutics Inc. [KPTI]

Date of Earliest Transaction Required to Be Reported:		02/25/2019
Relationship of Reporting Persons to Issuer:		10% Owner

If Amendment, Date Original Filed (Month/Day/Year):		Not Applicable

Individual or Joint/Group Filing:		Form filed by More than One Reporting Person
Signature and Date:		George Hadjimichael, by /s/ Simon Prisk, as attorney-in fact by power of attorney 02/27/2019

Name:		Wiaczeslaw Smolokowski

Address:		Chalet Lenotchka Ch.de Barnoud 1885 Chesieres Switzerland

Designated Filer:		Chione Limited

Issuer & Ticker Symbol:		Karyopharm Therapeutics Inc. [KPTI]

Date of Earliest Transaction Required to Be Reported:		02/25/2019

Relationship of Reporting Persons to Issuer:		10% Owner

If Amendment, Date Original Filed (Month/Day/Year):		Not Applicable

Individual or Joint/Group Filing:		Form filed by More than One Reporting Person

Signature and Date:		Wiaczeslaw Smolokowski, by /s/ Simon Prisk, as attorney-in fact by power of attorney 02/27/2019

Chione Ltd 4