Ribbon Communications Inc. EVP of Global Sales Stephen J. McCaffery filed a Form 4 on November 3, 2026, reporting the vesting of restricted stock units and related share withholding transactions dated October 31, 2026, on NASDAQ:RBBN.

Key Highlights

  • Two RSU tranches vested: 36,003 RSUs and 108,006 RSUs converted to common stock on October 31, 2026, for a combined 144,009 shares acquired.
  • Tax withholding shares disposed: 16,921 shares and 50,762 shares were withheld by the registrant at $1.55 per share to satisfy tax obligations, totaling 67,683 shares disposed.
  • Resulting direct ownership: Following all transactions, McCaffery directly held 163,526 shares of common stock.
  • RSU grants dated October 31, 2025: Both grants originated on that date; initial tranches vested one year later on October 31, 2026.
  • Remaining RSU balance: After vesting, McCaffery retained 72,003 RSUs from the first grant and 324,021 RSUs from the second grant as derivative securities.
  • Future vesting schedules: The 36,003-share grant vests in four equal semi-annual installments through October 31, 2028; the 108,006-share grant vests in six equal semi-annual installments through October 31, 2029.

McCaffery RSU Transactions at Ribbon Communications on October 31, 2026

According to the Form 4 filed November 3, 2026, Stephen J. McCaffery, EVP of Global Sales at Ribbon Communications Inc. (NASDAQ:RBBN), reported four transactions in common stock on October 31, 2026. Two transactions carried transaction code "M," reflecting the conversion of RSUs into common shares. Two transactions carried transaction code "F," reflecting shares withheld by the registrant to cover tax obligations associated with the vesting events.

The filing discloses that the first RSU grant converted 36,003 units to common stock (leaving a post-transaction direct holding of 123,203 shares), after which 16,921 shares were withheld at $1.55 per share, reducing the direct holding to 106,282 shares. The second RSU grant then converted 108,006 units, raising the direct holding to 214,288 shares, before 50,762 shares were withheld at $1.55 per share, leaving a final direct balance of 163,526 shares. The filing states that the $1.55 price "reflects shares of common stock withheld by the Registrant to satisfy tax withholding obligations in connection with the vesting."

In Table II, the filing reports that following the vesting of the first grant, 72,003 RSUs remain outstanding under that award, and 324,021 RSUs remain under the second award. The filing notes that each RSU "represents a contingent right to receive one share of the Registrant's common stock." The Form 4 was signed by Patrick Macken under a power of attorney from Stephen J. McCaffery on November 3, 2026.

What Was Disclosed

The filing covered RSU vesting and tax-related share withholding transactions by Ribbon Communications EVP Stephen J. McCaffery on October 31, 2026, resulting in direct beneficial ownership of 163,526 common shares and remaining RSU balances of 72,003 and 324,021 units.