SC 13G/A 1 d133911dsc13ga.htm SC 13G/A SC 13G/A

 

 

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

 

 

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)*

 

 

Syndax Pharmaceuticals, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

87164F105

(CUSIP Number)

December 31, 2020

(Date of Event Which Requires Filing of This Statement)

 

 

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐ Rule 13d-1(b)

☐ Rule 13d-1(c)

☒ Rule 13d-1(d)

 

*

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 the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose 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).

 

 

 


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

MPM BioVentures IV-QP, L.P.

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  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

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

PN

 

 

Page 2 of 14


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

MPM BioVentures IV GmbH & Co. Beteiligungs KG

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  3.  

SEC USE ONLY

 

  4.  

Citizenship or Place of Organization

 

Germany

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With:

   5.    

Sole Voting Power

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

PN

 

 

Page 3 of 14


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

MPM Asset Management Investors BV4 LLC

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  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

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

OO

 

 

Page 4 of 14


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

MPM BioVentures IV Strategic Fund, L.P.

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  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

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

PN

 

 

Page 5 of 14


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

MPM BioVentures IV GP LLC

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  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

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

PN

 

 

Page 6 of 14


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

MPM BioVentures IV LLC

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  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

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

OO

 

 

Page 7 of 14


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

Luke Evnin

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  3.  

SEC USE ONLY

 

  4.  

Citizenship or Place of Organization

 

United States

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With:

   5.    

Sole Voting Power

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

IN

 

 

Page 8 of 14


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

Ansbert Gadicke

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  3.  

SEC USE ONLY

 

  4.  

Citizenship or Place of Organization

 

United States

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With:

   5.    

Sole Voting Power

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

IN

 

 

Page 9 of 14


CUSIP No. 87164F105

 

  1.   

Name of Reporting Persons

 

Todd Foley

  2.  

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)  ☐        (b)  ☒

 

  3.  

SEC USE ONLY

 

  4.  

Citizenship or Place of Organization

 

United States

Number of

Shares

Beneficially

Owned by

Each

Reporting

Person

With:

   5.    

Sole Voting Power

 

0

   6.   

Shared Voting Power

 

0

   7.   

Sole Dispositive Power

 

0

   8.   

Shared Dispositive Power

 

0

  9.  

Aggregate Amount Beneficially Owned by Each Reporting Person

 

0

10.  

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

 

11.  

Percent of Class Represented by Amount in Row (9)

 

0%

12.  

Type of Reporting Person (See Instructions)

 

IN

 

 

Page 10 of 14


Item 1.

 

  (a)

Name of Issuer

Syndax Pharmaceuticals, Inc.

 

  (b)

Address of Issuer’s Principal Executive Offices

35 Gatehouse Drive

Building D, Floor 3

Waltham, MA 02451

 

Item 2.

 

  (a)

Name of Person Filing

MPM BioVentures IV-QP, L.P.

MPM BioVentures IV GmbH & Co. Beteiligungs KG

MPM Asset Management Investors BV4 LLC

MPM BioVentures IV Strategic Fund, L.P.

MPM BioVentures IV GP LLC

MPM BioVentures IV LLC

Luke Evnin

Ansbert Gadicke

Todd Foley

 

  (b)

Address of Principal Business Office or, if none, Residence

c/o MPM Capital LLC

450 Kendall Street

Cambridge, MA 02142

 

  (c)

Citizenship

All entities were organized in Delaware except MPM BioVentures IV GmbH & Co. Beteiligungs KG, which was organized in Germany. The individuals are all United States citizens.

 

  (d)

Title of Class of Securities

Common Stock

 

  (e)

CUSIP Number

87164F105

 

Item 3.

If this statement is filed pursuant to §§240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a:

Not applicable

 

Page 11 of 14


Item 4.

Ownership

 

MPM Entity

   Shares Held
Directly
     Sole Voting
Power
     Shared
Voting
Power
     Sole
Dispositive
Power
     Shared
Dispositive
Power
     Beneficial
Ownership
     Percentage
of Class
 

BV IV QP

     0        0        0        0        0        0        0

BV KG

     0        0        0        0        0        0        0

BV SF

     0        0        0        0        0        0        0

AM BV4

     0        0        0        0        0        0        0

BV IV GP

     0        0        0        0        0        0        0

BV IV LLC

     0        0        0        0        0        0        0

Luke Evnin

     0        0        0        0        0        0        0

Ansbert Gadicke

     0        0        0        0        0        0        0

Todd Foley

     0        0        0        0        0        0        0

 

Item 5.

Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following ☒.

 

Item 6.

Ownership of More than Five Percent on Behalf of Another Person

Not Applicable

 

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.

Not Applicable

 

Item 8.

Identification and Classification of Members of the Group

Not Applicable

 

Item 9.

Notice of Dissolution of a Group

Not Applicable

 

Item 10.

Certification

Not Applicable

 

Page 12 of 14


SIGNATURE

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.

Dated: February 11, 2021

 

MPM BIOVENTURES IV-QP, L.P.

    MPM BIOVENTURES IV GMBH & CO. BETEILIGUNGS KG

By:

 

MPM BioVentures IV GP LLC,

its General Partner

    By:   

MPM BioVentures IV GP LLC,

in its capacity as the Managing Limited Partner

By:

 

MPM BioVentures IV LLC,

its Managing Member

    By:   

MPM BioVentures IV LLC,

its Managing Member

By:

 

    /s/ Luke Evnin

Name: Luke Evnin

Title: Member

    By:   

  /s/ Luke Evnin

Name: Luke Evnin

Title: Member

MPM ASSET MANAGEMENT INVESTORS BV4 LLC     MPM BIOVENTURES IV STRATEGIC FUND, L.P.
By:   MPM BioVentures IV LLC, its Manager     By:   

MPM BioVentures IV GP LLC,

its General Partner

By:  

    /s/  Luke Evnin

Name: Luke Evnin

Title: Member

    By:   

MPM BioVentures IV LLC,

its Managing Member

      By:   

    /s/  Luke Evnin

Name: Luke Evnin

Title: Member

MPM BIOVENTURES IV GP LLC     MPM BIOVENTURES IV LLC
By:   MPM BioVentures IV LLC,     By:   

    /s/ Luke Evnin

  its Managing Member     Name:    Luke Evnin
      Title:    Member
By:  

    /s/ Luke Evnin

      
Name:   Luke Evnin       
Title:   Member       

By:

 

    /s/ Luke Evnin

Name: Luke Evnin

    By:   

    /s/ Ansbert Gadicke

Name: Ansbert Gadicke

By:

 

     /s/ Todd Foley

Name: Todd Foley

      

EXHIBITS

 

A:

Joint Filing Agreement

 

Page 13 of 14