Ardelyx (ARDX): Millennium entities and Israel Englander report 5.7% stake in 13G/A

Rhea-AI Filing Summary

Ardelyx, Inc. has a significant shareholder group led by investment entities affiliated with Millennium. Integrated Core Strategies (US) LLC reports beneficial ownership of 12,030,115 shares of Ardelyx common stock, representing 4.8% of the class, all with shared voting and dispositive power and no sole power. Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander each report beneficial ownership of 14,200,773 shares, or 5.7% of the outstanding common stock, again entirely on a shared basis for both voting and dispositive power and with no sole authority. The filing explains that these securities are held by entities over which Millennium Management LLC and related managers exercise voting control and investment discretion, and it includes language stating that this structure should not, by itself, be construed as an admission of beneficial ownership by Millennium Management LLC, Millennium Group Management LLC or Mr. Englander.

Key Figures

Integrated Core Strategies shares owned: 12,030,115 shares Integrated Core Strategies ownership percentage: 4.8% Millennium-related shares owned: 14,200,773 shares +3 more

6 metrics

Integrated Core Strategies shares owned 12,030,115 shares Beneficial ownership of Ardelyx common stock reported on the cover page

Integrated Core Strategies ownership percentage 4.8% Percentage of Ardelyx common stock class beneficially owned

Millennium-related shares owned 14,200,773 shares Beneficial ownership reported by Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander

Millennium-related ownership percentage 5.7% Percentage of Ardelyx common stock class reported as beneficially owned

Shared voting power (Integrated Core Strategies) 12,030,115 shares Number of shares over which Integrated Core Strategies has shared voting power

Shared voting power (Millennium entities and Englander) 14,200,773 shares Number of shares over which Millennium entities and Israel A. Englander have shared voting power

Key Terms

beneficial ownership, shared voting power, dispositive power, Schedule 13G/A, +1 more

5 terms

beneficial ownership financial

"The securities disclosed herein as potentially beneficially owned by Millennium Management LLC"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

shared voting power financial

"6 | Shared Voting Power 14,200,773.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

dispositive power financial

"Shared Dispositive Power 14,200,773.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Schedule 13G/A regulatory

"form_type": "SCHEDULE 13G/A""

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Joint Filing Agreement regulatory

"Exhibit I: Joint Filing Agreement, dated as of August 10, 2026"

FAQ

What ownership stake in Ardelyx (ARDX) does Integrated Core Strategies (US) LLC report?

Integrated Core Strategies (US) LLC reports beneficial ownership of 12,030,115 shares of Ardelyx common stock, representing 4.8% of the outstanding class, all with shared voting and shared dispositive power and no sole authority.

How many Ardelyx (ARDX) shares do Millennium entities and Israel A. Englander report owning?

Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander each report 14,200,773 shares of Ardelyx common stock, equal to 5.7% of the class, held with shared voting and shared dispositive power and no sole power.

Do the Millennium entities have sole or shared voting power over Ardelyx (ARDX) shares?

The Millennium-related filers report 0 shares with sole voting power and 14,200,773 shares with shared voting power. They likewise report no sole dispositive power and shared dispositive power over the same number of shares.

What disclaimers about beneficial ownership are included regarding Ardelyx (ARDX) shares?

The filing states that securities are held by entities subject to voting control and investment discretion of Millennium Management and related managers, and that this structure should not itself be construed as an admission of beneficial ownership by Millennium Management, Millennium Group Management or Israel A. Englander.

Which parties jointly file this Schedule 13G/A for Ardelyx (ARDX)?

The joint filing is made by Integrated Core Strategies (US) LLC, Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander, supported by a Joint Filing Agreement dated August 10, 2026, included as an exhibit.

Where is Ardelyx’s (ARDX) principal executive office located?

Ardelyx’s principal executive offices are located at 400 Fifth Avenue, Suite 210, Waltham, Massachusetts 02451. This address is listed in connection with the company’s common stock, par value $0.0001 per share, CUSIP 039697107.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/11/2026 - 06:11 PM Accepted by SEC EDGAR 08/11/2026 - 06:11 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Ardelyx, Inc.

(Name of Issuer)

Common Stock, par value $0.0001 per share

(Title of Class of Securities)

039697107

(CUSIP Number)

06/30/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 039697107

1

Names of Reporting Persons

Integrated Core Strategies (US) 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 0.00
6	Shared Voting Power 12,030,115.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 12,030,115.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

12,030,115.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.8 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP Number(s): 039697107

1

Names of Reporting Persons

Millennium Management 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 0.00
6	Shared Voting Power 14,200,773.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 14,200,773.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

14,200,773.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.7 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP Number(s): 039697107

1

Names of Reporting Persons

Millennium Group Management 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 0.00
6	Shared Voting Power 14,200,773.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 14,200,773.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

14,200,773.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.7 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP Number(s): 039697107

1

Names of Reporting Persons

Israel A. Englander

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 0.00
6	Shared Voting Power 14,200,773.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 14,200,773.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

14,200,773.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.7 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Ardelyx, Inc.
(b)	Address of issuer's principal executive offices: 400 Fifth Avenue, Suite 210, Waltham, Massachusetts 02451
Item 2.
(a)	Name of person filing: Integrated Core Strategies (US) LLC Millennium Management LLC Millennium Group Management LLC Israel A. Englander
(b)	Address or principal business office or, if none, residence: Integrated Core Strategies (US) LLC c/o Millennium Management LLC 399 Park Avenue New York, New York 10022 Millennium Management LLC 399 Park Avenue New York, New York 10022 Millennium Group Management LLC 399 Park Avenue New York, New York 10022 Israel A. Englander c/o Millennium Management LLC 399 Park Avenue New York, New York 10022
(c)	Citizenship: Integrated Core Strategies (US) LLC - Delaware Millennium Management LLC - Delaware Millennium Group Management LLC - Delaware Israel A. Englander - United States
(d)	Title of class of securities: Common Stock, par value $0.0001 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:
(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)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See response to Item 9 on each cover page.
(b)	Percent of class: See response to Item 11 on each cover page.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See response to Item 5 on each cover page.
	(ii) Shared power to vote or to direct the vote: See response to Item 6 on each cover page.
	(iii) Sole power to dispose or to direct the disposition of: See response to Item 7 on each cover page.
	(iv) Shared power to dispose or to direct the disposition of: See response to Item 8 on each cover page. The securities disclosed herein as potentially beneficially owned by Millennium Management LLC, Millennium Group Management LLC and Mr. Englander are held by entities subject to voting control and investment discretion by Millennium Management LLC and/or other investment managers that may be controlled by Millennium Group Management LLC (the managing member of Millennium Management LLC) and Mr. Englander (the sole voting trustee of the managing member of Millennium Group Management LLC). The foregoing should not be construed in and of itself as an admission by Millennium Management LLC, Millennium Group Management LLC or Mr. Englander as to beneficial ownership of the securities held by such entities.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 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 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, other than activities solely in connection with a nomination under § 240.14a-11.

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.

Integrated Core Strategies (US) LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	08/10/2026

Millennium Management LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	08/10/2026

Millennium Group Management LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	08/10/2026

Israel A. Englander

Signature:	/s/ Israel A. Englander
Name/Title:	Israel A. Englander
Date:	08/10/2026

Comments accompanying signature: ** INTEGRATED CORE STRATEGIES (US) LLC By: Integrated Holding Group LP, its Managing Member By: Millennium Management LLC, its General Partner

Exhibit Information

Exhibit I: Joint Filing Agreement, dated as of August 10, 2026, by and among Integrated Core Strategies (US) LLC, Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander.