Mattis Julia C 4

What Happened
Julia C. Mattis, Chief Licensing Officer of InterDigital, had 2,470.267 performance-based restricted stock units (RSUs) vest on March 15, 2026. At the reported fair market price of $362.35, the vested shares were worth about $895,000. To satisfy tax withholding and cash-settle fractional shares, a total of 2,044.92 shares were withheld or disposed (proceeds ≈ $740,978), leaving a net increase of about 425.347 shares (≈$154,100) added to her holdings.

Key Details

• Transaction date: March 15, 2026; Form 4 filed March 17, 2026 (timely).
• Vested: 2,470.267 RSUs (code A) — 2,372 performance RSUs at 200% of target plus 98.2674 dividend equivalents (per footnote).
• Withholding / dispositions: 1,050 + 993 whole shares and 0.267 + 1.653 fractional shares surrendered/paid (codes F and D) for tax obligations and cash settlement; total cash value disposed ≈ $740,978.
• Reported per-share price used: $362.35.
• Net new shares retained after withholding: ~425.347 shares (≈$154k at $362.35).
• Footnotes: Vesting reflects achievement of the 2023 performance goal (200% payout). Withholding satisfied tax liability; fractional shares were cash-settled.
• Filing timeliness: No late filing indicated.

Context
This was not an open-market purchase or an option exercise for immediate sale but the scheduled vesting of performance-based RSUs under the company’s equity plan, with the common practice of withholding/surrendering units to cover taxes (a cashless settlement). Such vesting events are routine compensation actions and are informational about realized compensation rather than a directional insider buy or sell signal.