Foster Eric Duane 4

What Happened

• Eric Duane Foster, Chief Commercial Officer of Ardelyx, was granted equity awards on January 23, 2026: 137,945 restricted stock units (RSUs) and 206,915 derivative awards (option-type). The Form 4 shows acquisition prices of $0.00 for both line items; total awards = 344,860 share-equivalents.
• The RSUs convert 1:1 to common stock upon vesting. The derivative award is structured as an option-like award that becomes exercisable as it vests.

Key Details

• Transaction date: January 23, 2026; Form 4 filed January 26, 2026 (timely filing).
• Grant prices reported: $0.00 for both the RSU and derivative awards (common for equity grants).
• Vesting schedule (footnote): the option-type award vests in 48 equal monthly installments beginning January 23, 2026, subject to continued employment.
• RSU conversion (footnote): each RSU entitles the holder to one share of common stock upon vesting.
• Footnote also notes inclusion of 2,780 shares purchased under the Ardelyx ESPP (Aug 31, 2025) in the reporting person’s holdings.
• Shares owned after the transaction were not stated in the provided excerpt.

Context

• This was an equity grant (award), not a sale or open-market purchase — typically part of executive compensation and not an immediate market signal. The derivative award vests monthly over four years and becomes exercisable as it vests; no immediate cashless exercise or sale was reported.