Schremser Christopher L. 4

What Happened

• Christopher L. Schremser, Chief Technology Officer of Waystar Holding Corp. (WAY), had 14,751 shares of common stock disposed (withheld) on June 9, 2026 at $19.23 per share, totaling $283,662. This was a tax-withholding/sell-to-cover transaction tied to the vesting of non‑qualified stock options and not an open-market sale intended as an investment action.

Key Details

• Transaction date & price: June 9, 2026; 14,751 shares at $19.23 each; proceeds ~$283,662.
• Transaction code: F — payment of exercise price or tax liability (shares withheld to satisfy tax obligations).
• Footnote: Shares were withheld to pay taxes on NQSOs granted June 6, 2024; the number withheld was determined by the actual sale price in a sell-to-cover on June 9, 2026.
• Footnote: Filing also references unvested RSUs (included in beneficial ownership disclosures).
• Shares owned after the transaction: Not specified in the filing.
• Filing timeliness: Reported on June 9, 2026 (period of report same day) — appears timely.

Context

• This was a routine tax-withholding (sell-to-cover) related to option vesting, effectively a disposition to satisfy tax obligations rather than a discretionary open-market sale. Such transactions are common following option vesting and don't necessarily signal insider sentiment about the company's stock.