Ardelyx, Inc.
MX ˙ BMV ˙ US0396971071
SecurityMX:ARDX / Ardelyx, Inc.
InstitutionVanguard Group Inc
Latest Disclosed Ownership0 shares
Ownership 0.00%
Vanguard Group Inc ownership in ARDX / Ardelyx, Inc.

2026-03-26 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of Ardelyx, Inc. (MX:ARDX). This represents 0.0 percent ownership of the company. In their previous filing dated 2026-01-30 , Vanguard Group Inc had reported owning 18,979,483 shares, indicating a decrease of -100.00 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-03-26 2026-03-26 13G/A 18,979,483 0 -100.00 0.00 -100.00
2026-01-30 2026-01-30 13G/A 16,031,649 18,979,483 18.39 7.81 16.57
2025-07-29 2025-07-29 13G/A 13,026,046 16,031,649 23.07 6.70 19.43
2024-02-13 2024-02-13 13G 13,026,046 5.61

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-01-29 2025-12-31 13F ARDELYX COM 039697107 18,979,483 610,162 3.32 110,650 9.32 0.0016
2025-11-07 2025-09-30 13F ARDELYX COM 039697107 18,369,321 2,337,672 14.58 101,215 61.06 0.0015
2025-08-11 2025-06-30 13F ARDELYX COM 039697107 16,031,649 1,034,415 6.90 62,844 -14.66 0.0010
2025-05-09 2025-03-31 13F ARDELYX COM 039697107 14,997,234 634,575 4.42 73,636 1.12 0.0013
2025-02-11 2024-12-31 13F ARDELYX COM 039697107 14,362,659 767,111 5.64 72,819 -22.26 0.0013
2024-11-13 2024-09-30 13F ARDELYX COM 039697107 13,595,548 -60,299 -0.44 93,673 -7.43 0.0017
2024-08-13 2024-06-30 13F ARDELYX COM 039697107 13,655,847 263,992 1.97 101,190 3.51 0.0019
2024-05-10 2024-03-31 13F ARDELYX COM 039697107 13,391,855 365,809 2.81 97,761 21.05 0.0019
2024-03-11 2023-12-31 13F/A-1 ARDELYX COM 039697107 13,026,046 1,460,246 12.63 80,761 71.15 0.0018
2024-02-14 2023-12-31 13F ARDELYX COM 039697107 13,026,046 1,460,246 80,761 0.0018
2023-12-18 2023-09-30 13F/A-1 ARDELYX COM 039697107 11,565,800 97,951 0.85 47,188 21.38 0.0012
2023-11-14 2023-09-30 13F ARDELYX COM 039697107 11,565,800 97,951 47,188 0.0002
2023-08-14 2023-06-30 13F ARDELYX COM 039697107 11,467,849 2,793,144 32.20 38,876 -6.44 0.0009
2023-07-14 2023-03-31 13F/A-1 ARDELYX COM 039697107 8,674,705 361,192 4.34 41,552 75.37 0.0011
2023-05-15 2023-03-31 13F ARDELYX COM 039697107 8,674,705 361,192 41,552 0.0011
2023-02-10 2022-12-31 13F ARDELYX COM 039697107 8,313,513 2,567,995 44.70 23,694 246.49 0.0006
2022-11-14 2022-09-30 13F ARDELYX COM 039697107 5,745,518 508,901 9.72 6,838 121.29 0.0002
2022-08-12 2022-06-30 13F ARDELYX COM 039697107 5,236,617 1,305,586 33.21 3,090 -26.53 0.0001
2022-05-13 2022-03-31 13F ARDELYX COM 039697107 3,931,031 -495,298 -11.19 4,206 -13.63 0.0001
2022-02-14 2021-12-31 13F ARDELYX COM 039697107 4,426,329 462,782 11.68 4,870 -6.92 0.0001
2021-11-12 2021-09-30 13F ARDELYX COM 039697107 3,963,547 66,954 1.72 5,232 -82.29 0.0001
2021-08-13 2021-06-30 13F ARDELYX COM 039697107 3,896,593 -79,345 -2.00 29,537 12.21 0.0007
2021-05-14 2021-03-31 13F ARDELYX COM 039697107 3,975,938 140,556 3.66 26,322 6.07 0.0007
2021-02-12 2020-12-31 13F ARDELYX COM 039697107 3,835,382 -134,638 -3.39 24,816 19.07 0.0007
2020-11-16 2020-09-30 13F ARDELYX COM 039697107 3,970,020 363,017 10.06 20,842 -16.50 0.0007
2020-08-14 2020-06-30 13F ARDELYX COM 039697107 3,607,003 451,958 14.32 24,961 39.17 0.0009
2020-05-15 2020-03-31 13F ARDELYX COM 039697107 3,155,045 147,074 4.89 17,936 -20.55 0.0008
2020-02-14 2019-12-31 13F ARDELYX COM 039697107 3,007,971 1,071,194 55.31 22,575 148.00 0.0008
2019-11-14 2019-09-30 13F ARDELYX COM 039697107 1,936,777 186,581 10.66 9,103 93.35 0.0003
2019-08-14 2019-06-30 13F ARDELYX COM 039697107 1,750,196 -626,407 -26.36 4,708 -29.25 0.0002
2019-05-15 2019-03-31 13F ARDELYX COM 039697107 2,376,603 413,088 21.04 6,654 89.30 0.0003
2019-02-14 2018-12-31 13F ARDELYX COM 039697107 1,963,515 -21,106 -1.06 3,515 -59.28 0.0002
2018-12-13 2018-09-30 13F/A-2 ARDELYX COM 039697107 1,984,621 60,171 3.13 8,633 21.25 0.0003
2018-11-23 2018-09-30 13F/A-1 ARDELYX COM 039697107 1,984,621 0 8,633 0.0003
2018-11-14 2018-09-30 13F ARDELYX COM 039697107 1,984,621 60,171 8,633
2018-08-14 2018-06-30 13F ARDELYX COM 039697107 1,924,450 436,460 29.33 7,120 -5.24 0.0003
2018-05-15 2018-03-31 13F ARDELYX COM 039697107 1,487,990 112,729 8.20 7,514 -17.22 0.0003
2018-02-14 2017-12-31 13F ARDELYX COM 039697107 1,375,261 319,189 30.22 9,077 53.46 0.0004
2017-11-14 2017-09-30 13F ARDELYX COM 039697107 1,056,072 -221,562 -17.34 5,915 -9.22 0.0003
2017-08-24 2017-06-30 13F/A-1 ARDELYX COM 039697107 1,277,634 48,077 3.91 6,516 -58.11 0.0003
2017-08-11 2017-06-30 13F ARDELYX COM 039697107 1,277,634 48,077 6,516
2017-05-12 2017-03-31 13F ARDELYX COM 039697107 1,229,557 47,853 4.05 15,554 -7.31 0.0008
2017-02-14 2016-12-31 13F ARDELYX COM 039697107 1,181,704 210,926 21.73 16,780 33.58 0.0009
2016-11-14 2016-09-30 13F ARDELYX COM 039697107 970,778 266,258 37.79 12,562 104.23 0.0007
2016-08-10 2016-06-30 13F ARDELYX COM 039697107 704,520 18,802 2.74 6,151 15.43 0.0004
2016-05-13 2016-03-31 13F ARDELYX COM 039697107 685,718 290,995 73.72 5,329 -25.50 0.0003
2016-02-08 2015-12-31 13F ARDELYX COM 039697107 394,723 37,281 10.43 7,153 15.82 0.0005
2015-11-12 2015-09-30 13F/A-1 ARDELYX COM 039697107 357,442 178,784 100.07 6,176 116.47 0.0003
2015-11-12 2015-09-30 13F/A-1 ARDELYX COM 039697107 357,442 178,784 6,176 0.0003
2015-11-12 2015-09-30 13F ARDELYX COM 039697107 4,966,287 185,801
2015-08-13 2015-06-30 13F ARDELYX COM 039697107 178,658 12,771 7.70 2,853 31.35 0.0002
2015-05-15 2015-03-31 13F/A-1 ARDELYX COM 039697107 165,887 12,674 8.27 2,172 -24.95 0.0001
2015-05-14 2015-03-31 13F ARDELYX COM 039697107 165,887 2,172
2015-02-12 2014-12-31 13F ARDELYX COM 039697107 153,213 90,383 143.85 2,894 224.08 0.0002
2014-11-12 2014-09-30 13F ARDELYX COM 039697107 62,830 62,830 893 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.