KOSTER CHRISTOPHER 4

What Happened
Christopher Koster, Centene's Secretary & General Counsel, had 9,087 shares disposed on March 15, 2026 to cover tax withholding tied to vested restricted stock units (RSUs). The shares were valued at $34.45 each for a total of $313,047. This was a tax-withholding disposition (transaction code F), not an open-market sale of newly purchased shares.

Key Details

• Transaction date: 2026-03-15; filing date: 2026-03-17 (Form 4 filed timely).
• Disposition: 9,087 shares withheld for taxes at $34.45 per share; total value ~$313,047.
• Shares owned after transaction: filing notes ownership includes 229,874 shares represented by previously-granted RSUs and PSUs (reported at target); the filing does not list a separate total common-share count.
• Notable footnotes:
  • F1: Shares were withheld specifically to satisfy tax obligations on vested RSUs.
  • F2: Ownership figure includes 229,874 previously-granted RSUs/PSUs (PSUs shown at target).
  • F3–F5: Additional disclosures about a 2021 performance stock option (price/vesting conditions) and phantom stock rights (cash/non-company security settlement, no formal expiration).
• Transaction type: F = tax withholding (routine disposition), not an indication of a market-view change.

Context
Tax-withholding disposals on RSU vesting are common and typically routine administrative events rather than insider-driven sales indicating a view on the company's stock. This was a cashless-type settlement by withholding shares to cover taxes; no open-market sale details are provided. The filing also notes other equity interests (PSUs, RSUs, a performance option, and phantom stock), which affect Mr. Koster’s overall economic exposure but do not change the routine nature of this tax-related disposition.