Form 4 for RBBN Ribbon Communications Inc.
Accepted 2026-04-17 08:39:30 ET · period of report 2026-04-15 · accession 0001708055-26-000022 · 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 | 2026-04-17 08:39 | 2026-04-15 | RBBN | Marmurek Eric S | SVP, CAO, Deputy CFO | M - OptEx | — | +37.5K | 464.6K | +9% | — |
| D | 2026-04-17 08:39 | 2026-04-15 | RBBN | Marmurek Eric S | SVP, CAO, Deputy CFO | F - Tax | $2.48 | -14.8K | 449.8K | -3% | -$36.6K |
| D | 2026-04-17 08:39 | 2026-04-15 | RBBN | Marmurek Eric S | SVP, CAO, Deputy CFO | M - OptEx | $0.00 | -37.5K | 37.5K | -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 | 2026-04-15 | M | A | 37,500 | — | 464,563 | D | — | — | (F1) Eash RSU represents a contingent right to receive one share of the Registrant's common stock. |
| 2 | Common | Common Stock | 2026-04-15 | F | D | 14,756 | $2.48 | 449,807 | 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) | 2026-04-15 | M | D | 37,500 | $0.00 | 37,500 | D | — · — to — | 37,500 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. The remaining RSUs vest on October 15, 2026. (F3) The RSUs were issued on October 15, 2024. The remaining RSUs vest on October 15, 2026. |