Tandem Diabetes (TNDM) EVP Elizabeth Gasser Converts RSUs; Shares Withheld

What Happened
Elizabeth A. Gasser, EVP & Chief Strategy Officer of Tandem Diabetes Care (TNDM), had restricted stock units (RSUs) convert to 3,014 shares on 2026-08-15. To satisfy tax withholding, 1,618 of those shares were withheld by the issuer at $22.72 per share (total withholding ≈ $36,761). No open-market sale occurred; net newly acquired shares were 1,396 (3,014 − 1,618), implying an approximate value of $31,717 at $22.72 per share. The securities are held by The Gasser Family Trust (she is a co‑trustee).

Key Details

• Transaction date: 2026-08-15; Form 4 filed 2026-08-18.
• Conversions/exercises: 3,014 RSUs converted to common stock (entries show 1,097 and 1,917). Exercise/conversion price reported as $0.00 (RSU conversion).
• Tax withholding: 1,618 shares withheld (entries reported at $22.72/share) totaling $13,382 and $23,379 (combined ≈ $36,761). No shares were sold on the open market. (Footnote F1)
• Awards and plans: RSUs awarded under the Tandem Diabetes Care 2023 Long‑Term Incentive Plan (awards dated May 23, 2024 and May 30, 2025). RSUs vest per the plan schedules noted in the filing (see F3–F7).
• Beneficial ownership: Securities held by The Gasser Family Trust dated Sept 1, 2011 (F2).
• Timeliness: Filing date is 2026-08-18 for the 2026-08-15 transaction; the filing does not indicate a late-report flag.

Context
This was a routine RSU vest/conversion with issuer withholding shares to cover tax obligations (a common “cashless” withholding method). Because shares were withheld rather than sold on the open market, the transaction does not represent an executed sale or purchase signal to investors — it reflects compensation vesting and tax settlement under the company’s equity plan.