TWOMEY CHRISTOPHER J 4

What Happened

• Christopher J. Twomey, a director of Tandem Diabetes Care, received a grant of 10,220 restricted stock units (RSUs) on May 20, 2026 (reported as an award, code A). Separately, 8,759 RSUs that were granted on May 21, 2025 vested on May 21, 2026, converted into common shares (reported as an exercise/conversion, code M), and those 8,759 shares were recorded as disposed the same day. All reported transactions show $0.00 per share (no cash purchase or sale value reported).

Key Details

• Transaction dates and types:
  • 2026-05-20: Grant/award of 10,220 RSUs (A) at $0.00.
  • 2026-05-21: Conversion/exercise of 8,759 RSUs into shares (M) at $0.00 (acquired) and same-day disposition of 8,759 shares (M) at $0.00.
• Price/Value: Reported price for all items = $0.00; no cash proceeds reported in the filing.
• Shares owned after transaction: Not specified in the provided summary of the filing.
• Footnotes of note:
  • The 10,220 award is a derivative RSU grant under the 2023 Long-Term Incentive Plan (see footnotes F3–F4).
  • The 8,759 RSUs were granted on May 21, 2025 and vested/converted on the one‑year anniversary (F5).
  • Securities are held by the Chris J. Twomey and Rebecca J. Twomey Family Trust and by Twomey Family Investments, LLC; Mr. Twomey is co-manager and disclaims beneficial ownership except to his pecuniary interest (F1–F2).
• Filing timeliness: Reported period of report is 2026-05-20 and the Form 4 was filed 2026-05-22 — appears timely.

Context

• RSUs are awards that convert into shares (or cash in lieu) according to plan terms; the filing notes the RSUs vest on the one-year anniversary. Converting RSUs and an immediate disposition on the same day commonly reflects shares being surrendered or withheld to satisfy tax-withholding obligations, although the filing lists $0.00 and does not state the precise withholding mechanism.
• This filing documents equity compensation vesting and a new RSU grant rather than an open-market buy or sale; such activity is typically routine for executive/director compensation.