UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

o

Rule 13d-1(b)

x

Rule 13d-1(c)

o

Rule 13d-1(d)

CUSIP No. 039697107

1

Names of Reporting Persons
Future Fund Board of Guardians

2

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

(a)

o

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Australia

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
3,436,426

7

Sole Dispositive Power
0

8

Shared Dispositive Power
3,436,426

9

Aggregate Amount Beneficially Owned by Each Reporting Person
3,436,426

10

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

11

Percent of Class Represented by Amount in Row (9)
7.3%

12

Type of Reporting Person (See Instructions)
OO

CUSIP No. 039697107

1

Names of Reporting Persons
Future Fund Investment Company No.4 Pty Ltd

2

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

(a)

o

(b)

o

3

SEC Use Only

4

Citizenship or Place of Organization
Australia

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With:

5

Sole Voting Power
0

6

Shared Voting Power
3,436,426

7

Sole Dispositive Power
0

8

Shared Dispositive Power
3,436,426

9

Aggregate Amount Beneficially Owned by Each Reporting Person
3,436,426

10

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

11

Percent of Class Represented by Amount in Row (9)
7.3%

12

Type of Reporting Person (See Instructions)
OO

Item 1.

(a)

Name of Issuer:
Ardelyx, Inc.

(b)

Address of Issuer’s Principal Executive Offices:
34175 Ardenwood Blvd., Suite 200, Fremont, CA 94555

Item 2.

(a)

Name of Person Filing:
Future Fund Board of Guardians

Future Fund Investment Company No.4 Pty Ltd

The Reporting Persons have entered into a Joint Filing Agreement, a copy of which was attached as Exhibit 99.1 to the Schedule 13G filed by the Reporting Persons on July 25, 2016, pursuant to which the Reporting Persons have agreed to file the statement and any amendments thereto jointly in accordance with the provisions of Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended.

(b)

Address of Principal Business Office or, if none, Residence:
Level 42, 120 Collins Street, Melbourne VIC 300, Australia

(c)

Citizenship:
Australia

(d)

Title and Class of Securities:
Common Stock, $0.0001 par value per share

(e)

CUSIP No.:
039697107

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.

Item 4.

Ownership

(a)

Amount beneficially owned:   

3,436,426

(b)

Percent of class:   

7.3%

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote :  

0

(ii)

Shared power to vote or to direct the vote:    

3,436,426

(iii)

Sole power to dispose or to direct the disposition of:   

0

(iv)

Shared power to dispose or to direct the disposition of:   

3,436,426

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   o.

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.

Future Fund Investment Company No.4 Pty Ltd holds, indirectly through The Northern Trust Company, a company incorporated in the State of Illinois, in its capacity as custodian for the Reporting Person, the ownership interest reported herein in Ardelyx, Inc.

By virtue of Future Fund Board of Guardians being the parent of Future Fund Investment Company No.4 Pty Ltd, Future Fund Board of Guardians may be deemed to share beneficial ownership of the shares beneficially held by Future Fund Investment Company No.4 Pty Ltd.

Item 8.

Identification and Classification of Members of the Group.

Not applicable.

Item 9.

Notice of Dissolution of Group.

Not applicable.

Item 10.

Certifications.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Executed by Future Fund Board of Guardians

by:

/s/ Paul Mann

/s/ Cameron Price

Signature of Authorised Signatory

Signature of Authorised Signatory

Paul Mann

Cameron Price

Name of Authorised Signatory

Name of Authorised Signatory

Executed by Future Fund Investment Company No.4 Pty Ltd by:

/s/ Paul Mann

/s/ Kylie Yong

Signature of Director

Signature of Company Secretary

Paul Mann

Kylie Yong

Name of Director

Name of Company Secretary