0001144204-15-008432.txt : 20150212 0001144204-15-008432.hdr.sgml : 20150212 20150212170401 ACCESSION NUMBER: 0001144204-15-008432 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20150212 DATE AS OF CHANGE: 20150212 GROUP MEMBERS: 3X5 SPECIAL OPPORTUNITY PARTNERS, LLC GROUP MEMBERS: JOHN P. MCKEARN, PH.D. GROUP MEMBERS: MR. JAY SCHMELTER GROUP MEMBERS: MR. THOMAS C. MELZER GROUP MEMBERS: RIVERVEST 3X5 SPECIAL OPPORTUNITY MANAGERS, LLC GROUP MEMBERS: RIVERVEST VENTURE FUND II (OHIO), L.P. GROUP MEMBERS: RIVERVEST VENTURE FUND II, L.P. GROUP MEMBERS: RIVERVEST VENTURE PARTNERS II (OHIO), LLC GROUP MEMBERS: RIVERVEST VENTURE PARTNERS II, L.P. GROUP MEMBERS: RIVERVEST VENTURE PARTNERS II, LLC SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: ZS Pharma, Inc. CENTRAL INDEX KEY: 0001459266 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 263305698 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-88212 FILM NUMBER: 15607305 BUSINESS ADDRESS: STREET 1: 508 WRANGLER DRIVE, SUITE 100 CITY: COPPELL STATE: TX ZIP: 75019 BUSINESS PHONE: 650-458-4100 MAIL ADDRESS: STREET 1: 508 WRANGLER DRIVE, SUITE 100 CITY: COPPELL STATE: TX ZIP: 75019 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: 3x5 Special Opportunity Fund, L.P. CENTRAL INDEX KEY: 0001529594 IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 7733 FORSYTH BOULEVARD CITY: ST. LOUIS STATE: MO ZIP: 63105 BUSINESS PHONE: 314-726-6700 MAIL ADDRESS: STREET 1: 7733 FORSYTH BOULEVARD CITY: ST. LOUIS STATE: MO ZIP: 63105 SC 13G 1 v401349_sc13g.htm SC 13G

 

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

 

SCHEDULE 13G

 

Under the Securities Exchange Act of 1934
(Amendment No. ________)*

 

ZS Pharma, Inc. (ZSPH)

(Name of Issuer)

 

Common Stock, par value $0.001 per share

(Title of Class of Securities)

 

98979G105

(CUSIP Number)

 

December 31, 2014

(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)

x  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 disclosures provided in a prior cover page.

 

The information required on 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. 98979G105   13G   Page 2 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

3x5 Special Opportunity Fund, L.P.

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
0
  6.   SHARED VOTING POWER
 
1,503,333(2)
  7.   SOLE DISPOSITIVE POWER
 
0
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(2)

 

 9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,333(2)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(3)		    
12.   TYPE OF REPORTING PERSON (see instructions)

PN		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of thieir pecuniary interest therein.

(3)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

  

 
 

 

CUSIP No. 98979G105   13G   Page 3 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

RiverVest Venture Fund II, L.P.

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
0
  6.   SHARED VOTING POWER
 
1,503,333(2)
  7.   SOLE DISPOSITIVE POWER
 
0
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(2)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,333(2)   		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(3)		    
12.   TYPE OF REPORTING PERSON (see instructions)

PN		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(3)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 4 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

RiverVest Venture Fund II (Ohio), L.P.

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
0
  6.   SHARED VOTING POWER
 
1,503,333(2)
  7.   SOLE DISPOSITIVE POWER
 
0
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(2)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,333(2)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(3)		    
12.   TYPE OF REPORTING PERSON (see instructions)

PN		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(3)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 5 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

RiverVest 3x5 Special Opportunity Managers, LLC

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
0
  6.   SHARED VOTING POWER
 
1,503,333(2)
  7.   SOLE DISPOSITIVE POWER
 
0
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(2)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,333(2)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(3)		    
12.   TYPE OF REPORTING PERSON (see instructions)

OO		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(3)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 6 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

3x5 Special Opportunity Partners, LLC

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
0
  6.   SHARED VOTING POWER
 
1,503,333(2)
  7.   SOLE DISPOSITIVE POWER
 
0
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(2)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,333(2)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(3)		    
12.   TYPE OF REPORTING PERSON (see instructions)

OO		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn, Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(3)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 7 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

RiverVest Venture Partners II, LLC

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
0
  6.   SHARED VOTING POWER
 
1,503,333(2)
  7.   SOLE DISPOSITIVE POWER
 
0
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(2)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,333(2)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(3)		    
12.   TYPE OF REPORTING PERSON (see instructions)

OO		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(3)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 8 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

RiverVest Venture Partners II, L.P.

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
0
  6.   SHARED VOTING POWER
 
1,503,333(2)
  7.   SOLE DISPOSITIVE POWER
 
0
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(2)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,333(2)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(3)		    
12.   TYPE OF REPORTING PERSON (see instructions)

PN		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(3)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 9 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

RiverVest Venture Partners II (Ohio), LLC

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Delaware, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
0
  6.   SHARED VOTING POWER
 
1,503,333(2)
  7.   SOLE DISPOSITIVE POWER
 
0
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(2)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,333(2)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(3)		    
12.   TYPE OF REPORTING PERSON (see instructions)

OO		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(3)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 10 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

Mr. Jay Schmelter

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Missouri, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
738(2)
  6.   SHARED VOTING POWER
 
1,503,333(3)
  7.   SOLE DISPOSITIVE POWER
 
738(2)
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(3)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,504,071(4)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(5)		    
12.   TYPE OF REPORTING PERSON (see instructions)

IN		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of 738 shares of common stock held by Jay Schmelter.

(3)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Mr. Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(4)  Consists of the shares referenced in Note 2 and in Note 3.

(5)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 11 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS

Mr. Thomas C. Melzer


    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Missouri, United States of America		    

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
737(2)
  6.   SHARED VOTING POWER
 
1,503,333(3)
  7.   SOLE DISPOSITIVE POWER
 
737(2)
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(3)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,504,070(4)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(5)		    
12.   TYPE OF REPORTING PERSON (see instructions)

IN		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of (i) 184 shares held by Mr. Melzer and (ii) 553 shares held by a trust of which Mr. Melzer is trustee.

(3)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P., (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. John P. McKearn, Ph.D. is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(4)  Consists of the shares referenced in Note 2 and in Note 3.

(5)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

CUSIP No. 98979G105   13G   Page 12 of 17 Pages

         
1.  

NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

Dr. John P. McKearn

 

    
2.   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
(see instructions)
(a)    ¨
(b)    x (1)		    
3.   SEC USE ONLY
 		    
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
 
Missouri, United States of America		    
                 

         
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH   5.   SOLE VOTING POWER
 
258(2)
  6.   SHARED VOTING POWER
 
1,503,333(3)
  7.   SOLE DISPOSITIVE POWER
 
258(2)
  8.   SHARED DISPOSITIVE POWER
 
1,503,333(3)

         
9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

1,503,591(4)		    
10.   CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
(see instructions)    ¨		    
         
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

7.2%(5)		    
12.   TYPE OF REPORTING PERSON (see instructions)

IN		    
   

(1)  This Schedule is filed by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P., RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC, RiverVest Venture Partners II, L.P., RiverVest Venture Partners II (Ohio), LLC, and Messrs. Jay Schmelter, Thomas C. Melzer and John P. McKearn (collectively, the “3x5 Persons”). The 3x5 Persons expressly disclaim status as a “group” for purposes of this Schedule 13G. The share amounts are as of February 11, 2015.

(2)  Consists of 258 shares held by Dr. John P. McKearn.

(3)  Consists of (i) 1,319,077 shares of common stock held by 3x5 Special Opportunity Fund, L.P., (ii) 144,901 shares of common stock held by RiverVest Venture Fund II, L.P. and (iii) 39,355 shares of common stock held by RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn is an authorized person and Thomas C. Melzer and Jay Schmelter are members of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC. RiverVest 3x5 Special Opportunity Managers, LLC is a member of 3x5 Special Opportunity Partners, LLC, the general partner of 3x5 Special Opportunity Fund, L.P. RiverVest Venture Partners II, LLC is the general partner of RiverVest Venture Partners II, L.P. RiverVest Venture Partners II, L.P. is the sole member of RiverVest Venture Partners II (Ohio), LLC, the general partner of RiverVest Venture Fund II (Ohio), L.P. RiverVest Venture Partners II, L.P. is also the general partner of RiverVest Venture Fund II, L.P. As an authorized person or member, as the case may be, of RiverVest 3x5 Special Opportunity Managers, LLC and RiverVest Venture Partners II, LLC, Dr. McKearn and Messrs. Melzer and Schmelter may be deemed to share dispositive voting and investment power with respect to the shares held by 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P. and RiverVest Venture Fund II (Ohio), L.P. Dr. McKearn and Messrs. Melzer and Schmelter disclaim beneficial ownership of such shares except to the extent of their pecuniary interest therein.

(4)  Consists of the shares referenced in Note 2 and Note 3.

(5)  Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

    

 

 
 

 

Item 1.

 

  (a) Name of Issuer
ZS Pharma, Inc.
     
  (b) Address of Issuer’s Principal Executive Offices
508 Wrangler Drive, Suite 100, Coppell, Texas
     
Item 2.
     

 

 

 (a)

Name of Person Filing
3x5 Special Opportunity Fund, L.P.

RiverVest Venture Fund II, L.P.

RiverVest Venture Fund II (Ohio), L.P.

RiverVest 3x5 Special Opportunity Managers, LLC

3x5 Special Opportunity Partners, LLC

RiverVest Venture Partners II, LLC

RiverVest Venture Partners II, L.P.

RiverVest Venture Partners II (Ohio), LLC

Mr. Jay Schmelter

Mr. Thomas C. Melzer

John P. McKearn, Ph.D.

     
  (b) Address of the Principal Office or, if none, residence
101 S. Hanley Road, Suite 1850, St. Louis, MO  63105
     
  (c)

Citizenship
Each of 3x5 Special Opportunity Fund, L.P., RiverVest Venture Fund II, L.P., RiverVest Venture Fund II (Ohio), L.P. and RiverVest Venture Partners II, L.P. are limited partnerships organized in the State of Delaware. Each of RiverVest 3x5 Special Opportunity Managers, LLC, 3x5 Special Opportunity Partners, LLC, RiverVest Venture Partners II, LLC and RiverVest Venture Partners II (Ohio), LLC are limited liability companies organized in the State of Delaware. Dr. McKearn and Messrs. Schmelter and Melzer are individuals residing in the State of Missouri.

 

     
  (d) Title of Class of Securities
Common Stock
     
  (e)

CUSIP Number
98979G105

 

 

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:

 

  (a) ¨ Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
       
  (b) ¨ Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).
       
  (c) ¨ Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).
       
  (d) ¨ Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
       
  (e) ¨ An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

 

 
 

 

  (f) ¨ An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
       
  (g) ¨ A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);
       
  (h) ¨ A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
       
  (i) ¨ A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
       
  (j) ¨ Group, in accordance with §240.13d-1(b)(1)(ii)(J).
     
    Not applicable

 

Item 4.  Ownership.

 

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

 

Entity or Individual  Shares
Held
Directly		   Sole
Voting
Power		   Shared
Voting
Power		   Sole
Dispositive
Power		   Shared
Dispositive
Power		   Beneficial
Ownership		   Percentage of
Class*		 
3x5 Special Opportunity Fund, L.P.   1,319,077    0    1,503,333    0    1,503,333    1,503,333    7.2%
RiverVest Venture Fund II, L.P.   144,901    0    1,503,333    0    1,503,333    1,503,333    7.2%
RiverVest Venture Fund II (Ohio), L.P.   39,355    0    1,503,333    0    1,503,333    1,503,333    7.2%
RiverVest 3x5 Special Opportunity Managers, LLC   0    0    1,503,333    0    1,503,333    1,503,333    7.2%
3x5 Special Opportunity Partners, LLC   0    0    1,503,333    0    1,503,333    1,503,333    7.2%
RiverVest Venture Partners II, LLC   0    0    1,503,333    0    1,503,333    1,503,333    7.2%
RiverVest Venture Partners II, L.P.   0    0    1,503,333    0    1,503,333    1,503,333    7.2%
RiverVest Venture Partners II (Ohio), LLC   0    0    1,503,333    0    1,503,333    1,503,333    7.2%
Jay Schmelter   738    738    1,503,333    738    1,503,333    1,504,071    7.2%
Thomas C. Melzer**   737    737    1,503,333    737    1,503,333    1,504,070    7.2%
John P. McKearn, Ph.D.   258    258    1,503,333    258    1,503,333    1,503,591    7.2%

 

* Based on 20,819,299 shares of common stock, par value $0.001 per share, outstanding on September 30, 2014, based on information contained in the 10-Q filed by the Issuer dated November 10, 2014.

 

** Includes 553 shares held by a trust of which Mr. Melzer is trustee.

 

Instruction. For computations regarding securities which represent a right to acquire an underlying security see §240.13d-3(d)(1).

 

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     ¨.

 

Instruction. Dissolution of a group requires a response to this item.

 

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.

 

 Not applicable

 

Item 8.  Identification and Classification of Members of the Group.

 

 Not applicable

 

Item 9.  Notice of Dissolution of Group.

 

 Not applicable

 

Item 10.  Certification.

 

 Not applicable

 

 
 

 

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.

 

    February 12, 2015
     
3x5 Special Opportunity Fund, L.P.   RiverVest Venture Fund II, L.P.
   
By: 3x5 Special Opportunity Partners, LLC,   By: RiverVest Venture Partners II, L.P.,
its general partner   its general partner
By: RiverVest 3x5 Special Opportunity Managers, LLC,   By: RiverVest Venture Partners II, LLC,
its member   Its sole general partner
         
By: /s/ Thomas C. Melzer   By: /s/ Thomas C. Melzer
  Name: Thomas C. Melzer     Name: Thomas Melzer
  Title:    Member     Title:  Member
         
RiverVest Venture Fund II (Ohio), L.P.   3x5 Special Opportunity Partners, LLC
       
By: RiverVest Venture Partners II (Ohio), LLC,   By: /s/ Thomas C. Melzer
its general partner     Name:  Thomas C. Melzer
By: RiverVest Venture Partners II, L.P.,     Title:     Member
its sole member      
By: RiverVest Venture Partners II, LLC,      
Its general partner      
         
By: /s/ Thomas C. Melzer      
  Name: Thomas C. Melzer      
  Title:    Member      
         
RiverVest Venture Partners II (Ohio), LLC   RiverVest Venture Partners II, L.P.
         
By: /s/ Thomas C. Melzer   By: RiverVest Venture Partners II, LLC,
  Name:  Thomas C. Melzer   its sole general partner
  Title:     Member      
      By: /s/ Thomas C. Melzer
        Name: Thomas Melzer
        Title:    Member
         
RiverVest 3x5 Special Opportunity Managers, LLC   RiverVest Venture Partners II, LLC
         
By: /s/ Thomas C. Melzer   By: /s/ Thomas C. Melzer
  Name: Thomas Melzer     Name:  Thomas Melzer
  Title:    Member     Title:     Member
         
/s/ Thomas C. Melzer   /s/ Jay W. Schmelter
Thomas C. Melzer   Jay Schmelter
     
/s/  John P. McKearn    
John P. McKearn    

 

 
 

 

EXHIBIT A

JOINT FILING AGREEMENT

 

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned persons agree and consent to the joint filing on their behalf of a statement on Schedule 13G, including amendments thereto, in connection with shares of common stock of ZS Pharma, Inc., and that this agreement shall be included as an Exhibit to the Schedule 13G. Each of the undersigned agrees to be responsible for the timely filing of the Schedule 13G and any amendments thereto, and for the completeness and accuracy of the information concerning itself contained in the Schedule 13G and any amendments thereto.

 

IN WITNESS WHEREOF, the parties have executed this Joint Filing Agreement on February 12, 2015.

 

3x5 Special Opportunity Fund, L.P.   RiverVest Venture Fund II, L.P.
   
By: 3x5 Special Opportunity Partners, LLC,   By: RiverVest Venture Partners II, L.P.,
its general partner   its general partner
By: RiverVest 3x5 Special Opportunity Managers, LLC,   By: RiverVest Venture Partners II, LLC,
its member   Its sole general partner
         
By: /s/ Thomas C. Melzer   By: /s/ Thomas C. Melzer
  Name: Thomas C. Melzer     Name: Thomas Melzer
  Title:    Member     Title:  Member
         
RiverVest Venture Fund II (Ohio), L.P.   3x5 Special Opportunity Partners, LLC
       
By: RiverVest Venture Partners II (Ohio), LLC,   By: /s/ Thomas C. Melzer
its general partner     Name:  Thomas C. Melzer
By: RiverVest Venture Partners II, L.P.,     Title:     Member
its sole member      
By: RiverVest Venture Partners II, LLC,      
Its general partner      
         
By: /s/ Thomas C. Melzer      
  Name: Thomas C. Melzer      
  Title:    Member      
         
RiverVest Venture Partners II (Ohio), LLC   RiverVest Venture Partners II, L.P.
         
By: /s/ Thomas C. Melzer   By: RiverVest Venture Partners II, LLC,
  Name:  Thomas C. Melzer   its sole general partner
  Title:     Member      
      By: /s/ Thomas C. Melzer
        Name: Thomas Melzer
        Title:    Member
         
RiverVest 3x5 Special Opportunity Managers, LLC   RiverVest Venture Partners II, LLC
         
By: /s/ Thomas C. Melzer   By: /s/ Thomas C. Melzer
  Name: Thomas Melzer     Name:  Thomas Melzer
  Title:    Member     Title:     Member
         
/s/ Thomas C. Melzer   /s/ Jay W. Schmelter
Thomas C. Melzer   Jay Schmelter
     
/s/  John P. McKearn    
John P. McKearn