Form 4 for RBBN Ribbon Communications Inc.
Accepted 2025-10-17 00:00:00 ET · period of report 2025-10-15 · accession 0001708055-25-000027 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-10-17 | 2025-10-15 | RBBN | Marmurek Eric S | SVP, CAO, Deputy CFO | M - OptEx | — | +75.0K | 456.6K | +20% | — |
| D | 2025-10-17 | 2025-10-15 | RBBN | Marmurek Eric S | SVP, CAO, Deputy CFO | F - Tax | $3.81 | -29.5K | 427.1K | -6% | -$112.4K |
| D | 2025-10-17 | 2025-10-15 | RBBN | Marmurek Eric S | SVP, CAO, Deputy CFO | M - OptEx | $0.00 | -75.0K | 75.0K | -50% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-10-15 | M | A | 75,000 | — | 456,575 | D | — | — | (F1) Eash RSU represents a contingent right to receive one share of the Registrant's common stock. |
| 2 | Common | Common Stock | 2025-10-15 | F | D | 29,512 | $3.81 | 427,063 | D | — | — | (F2) Reflects shares of common stock withheld by the Registrant to satisfy tax withholding obligations in connection with the vesting. |
| 3 | Derivative | Restricted Stock Units (RSUs) | 2025-10-15 | M | D | 75,000 | $0.00 | 75,000 | D | — · — to — | 75,000 Common Stock | (F1) Eash RSU represents a contingent right to receive one share of the Registrant's common stock. (F3) The RSUs were issued on October 15, 2024 and vested as to 50% on October 15, 2025. The remaining 50% of the RSUs vest in two equal semi-annual installments thereafter through October 15, 2026. |