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Ken Griffin's Ardelyx, Inc. (ARDX) position

Yes: as of Q1 2026, Ken Griffin holds 3.5M shares of ARDX worth $21M (0.0% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
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Current value
$21M
Shares held
3.5M
% of portfolio
0.0%
Est. average buy price (i)
$5.66
est. since Q2 2025
Quarter-end price
$5.99

Estimated trade prices

Average price in quarters with purchases
$5.34
Average prices in quarters with sales
  • Q4 2025: $5.57 (201K shares sold)
  • Q3 2025: $5.43 (683K shares sold)
  • Q2 2024: $7.03 (190K shares sold)
  • Q4 2023: $4.49 (49K shares sold)
  • Q2 2023: $4.10 (183K shares sold)
  • Q3 2022: $0.95 (311K shares sold)

ARDX price vs Griffin's position

1Y 3Y 5Y MAX
Dates
$0.5$5$1020222023202420252026Added 90K shares (72.4%) · Q3 2021. Average closing price $1.57 · Price range $1.27–$2.0490KsharespurchasedNew position of 437K shares · Q2 2022. Average closing price $0.74 · Price range $0.51–$1.17437KsharespurchasedSold 311K shares (71.2%) · Q3 2022. Average closing price $0.95 · Price range $0.59–$1.44311KsharessoldSold 183K shares (72.9%) · Q2 2023. Average closing price $4.10 · Price range $3.23–$4.95183KsharessoldAdded 147K shares (216.6%) · Q3 2023. Average closing price $3.90 · Price range $3.30–$4.83147KsharespurchasedSold 49K shares (22.7%) · Q4 2023. Average closing price $4.49 · Price range $3.29–$6.6449KsharessoldSold 190K shares (42.2%) · Q2 2024. Average closing price $7.03 · Price range $5.89–$9.31190KsharessoldAdded 282K shares (12.8%) · Q4 2024. Average closing price $5.52 · Price range $4.50–$6.93282KsharespurchasedAdded 700K shares (28.1%) · Q1 2025. Average closing price $5.37 · Price range $4.91–$6.42700KsharespurchasedSold 683K shares (30.9%) · Q3 2025. Average closing price $5.43 · Price range $3.90–$6.68683KsharessoldSold 201K shares (13.2%) · Q4 2025. Average closing price $5.57 · Price range $4.94–$6.21201KsharessoldAdded 2.1M shares (161.0%) · Q1 2026. Average closing price $6.62 · Price range $5.31–$7.992.1Msharespurchased← Earlier —1 purchase
Average closing price · filing quarter
$6.62
Price range · filing quarter
$5.31 – $7.99
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Added +2.1M +$14M +161.0% 3.5M May 15, 2026
Q4 2025 Reduced −201K −$1.1M −13.2% 1.3M Feb 17, 2026
Q3 2025 Reduced −683K −$3.7M −30.9% 1.5M Nov 14, 2025
Q2 2025 First covered – – – 2.2M Aug 14, 2025
Q1 2025 Added +700K +$3.8M +28.1% 3.2M May 15, 2025
Q4 2024 Added +282K +$1.6M +12.8% 2.5M Feb 14, 2025
Q3 2024 First covered – – – 2.2M Nov 14, 2024
Q2 2024 Reduced −190K −$1.3M −42.2% 261K Aug 14, 2024
Q1 2024 First covered – – – 451K May 15, 2024
Q4 2023 Reduced −49K −$219K −22.7% 166K Feb 14, 2024
Q3 2023 Added +147K +$574K +216.6% 215K Nov 14, 2023
Q2 2023 Reduced −183K −$748K −72.9% 68K Aug 14, 2023
Q1 2023 First covered – – – 250K May 15, 2023
Q4 2022 First covered – – – 9K Feb 14, 2023
Q3 2022 Reduced −311K −$296K −71.2% 126K Nov 14, 2022
Q2 2022 New +437K +$322K – 437K Aug 15, 2022
Q4 2021 First covered – – – 179K Feb 14, 2022
Q3 2021 Added +90K +$140K +72.4% 213K Nov 15, 2021
Q2 2021 Added +69K +$128K +126.5% 124K Aug 16, 2021
Q1 2021 First covered – – – 55K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
20 grouped rows from 20 quarters

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Common questions

Does Ken Griffin own ARDX?

Yes. As of Q1 2026, Ken Griffin disclosed 3.5M shares of ARDX, worth $21M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy ARDX?

Ken Griffin held ARDX since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell ARDX?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in ARDX. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of ARDX does Ken Griffin own?

Ken Griffin disclosed 3.5M shares of ARDX as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for ARDX?

Ken Griffin began building the ARDX position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.