13D Filing: Delphi Ventures VIII LP and Karyopharm Therapeutics Inc. (KPTI)

You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
James J. Bochnowski ( Bochnowski ) 2,241,123 2,263,006 2,241,123 2,263,006 2,241,123 4.8%
David L. Douglass ( Douglass ) 21,883 2,263,006 21,883 2,263,006 21,883 0.0%
Deepika R. Pakianathan ( Pakianathan ) 2,263,006 2,263,006 2,263,006 2,263,006 2,263,006 4.8%
Douglas A. Roeder ( Roeder ) 0 2,263,006 0 2,263,006 2,263,006 4.8%

Page 1 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page 1 of 12

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Schedule 13D

INFORMATION TO BE INCLUDED IN STATEMENTS FILED
PURSUANT TO RULES 13d-1 (a) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (a)

(Amendment No. 2)

Karyopharm Therapeutics Inc.

(Name of Issuer)

Common Stock,
par value $0.0001 per share

(Title of Class of Securities)

48576U106

(CUSIP Number)

Matthew Potter

c/o Delphi Ventures

160 Bovet Rd, Suite 408

San Mateo, CA 94402

(650) 854-9650

 

COPY TO:

Christine Wichrowski, Esq.

c/o Gunderson Dettmer Stough Villeneuve Franklin
& Hachigian, LLP

1200 Seaport Boulevard, Redwood City, California
94063

(650) 321-2400

(Name, Address
and Telephone Number of Person Authorized to Receive Notices and Communications)

April 28, 2017

 (Date
of Event Which Requires Filing of this Statement)

If the filing person has
previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box ¨.

Note: Schedules filed in
paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other
parties to whom copies are to be sent.

* The remainder of this
cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of
securities and for any subsequent amendment containing information which would alter disclosures provided in the cover page.

The information required
on the remainder of this cover page shall not be deemed to be “filed” for the purposes of Section 18 of the Securities
Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject
to all other provisions of the Act (however, see the Notes).

 

(Continued on following
pages)

 

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Page 2 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page
2 of 12
1

NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Delphi Ventures VIII, L.P. (“Delphi
VIII”)

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a)   ¨   (b)   x

3 SEC USE ONLY
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware

 

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING

PERSON
WITH
5 SOLE VOTING POWER
2,241,123 shares, except that Delphi Management Partners VIII, L.L.C. (“DMP VIII”), the general partner of Delphi VIII, may be deemed to have sole power to vote these shares, and James J. Bochnowski (“Bochnowski”), David L. Douglass (“Douglass”), Deepika R. Pakianathan (“Pakianathan”) and Douglas A. Roeder (“Roeder”), the managing members of DMP VIII, may be deemed to have shared power to vote these shares.
6 SHARED VOTING POWER
See response to row 5.
7 SOLE DISPOSITIVE POWER
2,241,123 shares, except that DMP VIII, the general partner of Delphi VIII, may be deemed to have sole power to dispose of these shares, and Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to dispose of these shares.
8 SHARED DISPOSITIVE POWER
See response to row 7.

 

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON

2,241,123

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*

¨

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
9

4.8%

12

TYPE OF REPORTING PERSON*

PN

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Page 3 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page
3 of 12
1

NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Delphi BioInvestments VIII, L.P. (“DBI
VIII”)

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a)   ¨   (b)   x

3 SEC USE ONLY
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware

 

NUMBER
OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON
WITH
5 SOLE
VOTING POWER
21,883 shares, except that DMP VIII, the general partner of DBI VIII, may be deemed to have sole power to vote these shares,
and Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to
vote these shares.
  6 SHARED
VOTING POWER
See response to row 5.
  7 SOLE
DISPOSITIVE POWER
21,883 shares, except that DMP VIII, the general partner of Delphi VIII, may be deemed to have sole power to dispose of these
shares, and Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power
to dispose of these shares.
  8 SHARED
DISPOSITIVE POWER
See response to row 7.

 

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON

21,883

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*

¨

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
9

0.0%

12

TYPE OF REPORTING PERSON*

PN

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Page 4 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page
4 of 12
1

NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

Delphi Management Partners VIII, L.L.C.
(“DMP VIII”)

2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a)   ¨   (b)   x

3 SEC USE ONLY
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware

 

NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING

PERSON
WITH
5 SOLE VOTING POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  DMP VIII is the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have sole voting power with respect to such shares, except Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to vote these shares.
6 SHARED VOTING POWER
See response to row 5.
7 SOLE DISPOSITIVE POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  DMP VIII is the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have sole power to dispose of these shares, except Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to dispose of these shares.
8 SHARED DISPOSITIVE POWER
See response to row 7.

 

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON

2,263,006

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*

¨

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
9

4.8%

12

TYPE OF REPORTING PERSON*

OO

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Page 5 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page
5 of 12
1 NAME OF REPORTING PERSON               James J. Bochnowski (“Bochnowski”)
2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a)   ¨   (b)   x

3 SEC USE ONLY
4

CITIZENSHIP
OR PLACE OF ORGANIZATION
U.S. Citizen

 

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY EACH

REPORTING

PERSON

WITH

5 SOLE VOTING POWER
0 shares.
6 SHARED VOTING POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  Bochnowski is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to vote these shares.
7 SOLE DISPOSITIVE POWER
0 shares.
8 SHARED DISPOSITIVE POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  Bochnowski is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to dispose of these shares.

 

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH

REPORTING PERSON

2,263,006

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*

¨

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
9

4.8%

12

TYPE OF REPORTING PERSON*

IN

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Page 6 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page
6 of 12
1 NAME OF REPORTING PERSON               David L. Douglass (“Douglass”)
2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a)   ¨   (b)   x

3 SEC USE ONLY
4 CITIZENSHIP
OR PLACE OF ORGANIZATION
U.S. Citizen

 

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY EACH

REPORTING

PERSON

WITH

5 SOLE VOTING POWER
0 shares.
6 SHARED VOTING POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  Douglass is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to vote these shares.
7 SOLE DISPOSITIVE POWER
0 shares.
8 SHARED DISPOSITIVE POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  Douglass is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to dispose of these shares.

 

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON

2,263,006

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*

¨

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
9

4.8%

12

TYPE OF REPORTING PERSON*

IN

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Page 7 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page
7 of 12
1 NAME OF REPORTING PERSON               Deepika R. Pakianathan (“Pakianathan”)
2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a)   ¨   (b)   x

3 SEC USE ONLY
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen

 

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY EACH

REPORTING

PERSON

WITH

5 SOLE VOTING POWER
40,000 shares, which are issuable pursuant to outstanding options exercisable within 60 days of April 28, 2017.
6 SHARED VOTING POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  Pakianathan is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to vote these shares.
7 SOLE DISPOSITIVE POWER
40,000 shares, which are issuable pursuant to outstanding options exercisable within 60 days of April 28, 2017.
8 SHARED DISPOSITIVE POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  Pakianathan is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to dispose of these shares.

 

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH

REPORTING PERSON

2,303,006

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*

¨

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
9

4.9%

12

TYPE OF REPORTING PERSON*

IN

 

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Page 8 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page
8 of 12
1 NAME OF REPORTING PERSON               Douglas A. Roeder (“Roeder”)
2

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

(a)   ¨   (b)   x

3 SEC USE ONLY
4 CITIZENSHIP OR PLACE OF ORGANIZATION
U.S. Citizen

 

NUMBER OF

SHARES

BENEFICIALLY

OWNED BY EACH

REPORTING

PERSON

WITH

5 SOLE VOTING POWER
0 shares.
6 SHARED VOTING POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  Roeder is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to vote these shares.
7 SOLE DISPOSITIVE POWER
0 shares.
8 SHARED DISPOSITIVE POWER
2,263,006 shares, of which 2,241,123 shares are directly owned by Delphi VIII and 21,883 shares are directly owned by DBI VIII.  Roeder is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to dispose of these shares.

 

9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON

2,263,006

10

CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*

¨

11

PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW
9

4.8%

12

TYPE OF REPORTING PERSON*

IN

 

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Page 9 of 12 – SEC Filing

 

CUSIP NO.   48576U106 13D Page
9 of 12

 

ITEM 1. SECURITY AND ISSUER.

This Amendment No. 2 to
Schedule 13D relates to the beneficial ownership of the common stock, par value $0.0001 per share (the “Common Stock”),
of Karyopharm Therapeutics Inc., a Delaware corporation (the “Company”), by the Reporting Persons and supplements and
amends the Schedule 13D originally filed with the Securities and Exchange Commission (the “SEC”) on November 15, 2013
and amended on February 14, 2017 (as amended, the “Original Schedule 13D”) to reflect changes resulting solely from
the impact of changes in the number of outstanding shares of the Common Stock in connection with a follow-on public offering (the
“Follow-On Offering”) and sales of Common Stock under an at-the-market offering program (the “ATM Offering”).
Only those items that are hereby reported are amended; all other items reported in the Original Schedule 13D remain unchanged.
Information given in response to each item shall be deemed incorporated by reference in all other items, as applicable. Capitalized
terms not defined in this Amendment No. 2 have the meanings ascribed to them in the Original Schedule 13D. The Company’s
principal executive offices are located at 2 Mercer Road, Natick, Massachusetts 01760.

ITEM 2. IDENTITY AND BACKGROUND.

Items 2(a)-(c) and 5(f) of the Original Schedule
13D are hereby amended and restated in their entirety as follows:

(a-c, f) This Schedule
13D is being filed on behalf of: (i) Delphi Ventures VIII, L.P., a Delaware limited partnership (“Delphi VIII”), (ii)
Delphi BioInvestments VIII, L.P., a Delaware limited partnership (“DBI VIII”), (iii) Delphi Management Partners VIII,
L.L.C., a Delaware limited liability company (“DMP VIII”), and (iv) James J. Bochnowski (“Bochnowski”),
a citizen of the United States, (v) David L. Douglass (“Douglass”), a citizen of the United States, (vi) Deepika R.
Pakianathan (“Pakianathan”), a citizen of the United States, and (vii) Douglas A. Roeder (“Roeder”), a
citizen of the United States (the foregoing entities and individuals are collectively referred to as the “Reporting Persons”).

Delphi VIII and DBI VIII are venture capital
funds. DMP VIII is the general partner of each of Delphi VIII and DBI VIII. Bochnowski, Douglass, Pakianathan and Roeder are the
managing members of DMP VIII (collectively, the “Managing Members”). The principal business office of the Reporting
Persons is 16 Bovet Road, Suite #408, San Mateo, California 94402.

 

ITEM 5. INTEREST IN SECURITIES OF THE ISSUER.

Items 5(a), 5(b) and 5(e) of the Original Schedule
13D are hereby amended and restated in their entirety as follows:

(a,b)
Regarding aggregate beneficial ownership, see Row 9 of the cover page
of each Reporting Person. Regarding percentage beneficial ownership, see Row 11 of the cover page of each Reporting Person.
Regarding sole power to vote shares, see Row 5 of the cover page of each Reporting Person. Regarding shared power to vote
shares, see Row 6 of the cover page of each Reporting Person. Regarding sole power to dispose of shares, see Row 7 of the
cover page of each Reporting Person. Regarding shared power to dispose of shares, see Row 8 of the cover page of each
Reporting Person. Aggregate beneficial ownership is based on 47,118,234 shares of Common Stock outstanding as of April 28,
2017. Although none of the Reporting Persons acquired any shares of Common Stock from the date of the Original Schedule 13D
through April 28, 2017 (the “Interim Period”), during the Interim Period there was a material change in the
percentage of Common Stock that the Reporting Persons are deemed to beneficially own as a result of the Follow-On Offering
and the ATM Offering.

(e)
The Reporting Persons
ceased to be beneficial owners of 5% or more of the Company’s Common Stock on April 28, 2017.

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Page 10 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page 10 of 12

SIGNATURES

After reasonable inquiry and to the best of my
knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: June 6, 2017

DELPHI VENTURES VIII, L.P.
By:   Delphi Management Partners VIII, L.L.C.
General Partner
By: /s/ Matthew T. Potter
Name: Matthew T. Potter
Title: Chief Financial Officer/Attorney-In-Fact
DELPHI BIOINVESTMENTS VIII, L.P.
By:   Delphi Management Partners VIII, L.L.C.
General Partner
By: /s/ Matthew T. Potter
Name: Matthew T. Potter
Title: Chief Financial Officer/Attorney-In-Fact
DELPHI MANAGEMENT PARTNERS VIII, L.L.C.
By: /s/ Matthew T. Potter
Name: Matthew T. Potter
Title: Chief Financial Officer/Attorney-In-Fact

* Signed pursuant to a Power of Attorney already
on file with the appropriate agencies.

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Page 11 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page 11 of 12
JAMES J. BOCHNOWSKI
DAVID L. DOUGLASS
DEEPIKA R. PAKIANATHAN
DOUGLAS A. ROEDER
By: /s/ Matthew T. Potter
Name: Matthew T. Potter
Title: Chief Financial Officer/Attorney-In-Fact

* Signed pursuant to a Power of Attorney already
on file with the appropriate agencies.

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Page 12 of 12 – SEC Filing

CUSIP NO.   48576U106 13D Page 12 of 12

exhibit A

Agreement of Joint Filing

The Reporting Persons agree that a single Schedule
13D (or any amendment thereto) relating to the Common Stock of Karyopharm Therapeutics Inc. shall be filed on behalf of each of
the Reporting Persons. Note that copies of the applicable Agreement of Joint Filing are already on file with the appropriate agencies.

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