Marmurek Eric S
SEC insider (Form 3/4/5 filer). CIK 0001720721. EVP, Chief Financial Officer at Ribbon Communications Inc. (RBBN). 40 reported Form 4/5 transactions since Sep 2024; latest on Oct 15, 2026. Located in PLANO, TX.
Companies Marmurek Eric S has filed insider reports for
- Ribbon Communications Inc. (RBBN): Officer, EVP, Chief Financial Officer
Marmurek Eric S
CIK: 0001720721
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Ribbon Communications Inc.
Discretionary Trading P&L
Holdings
Transaction History (40 total)
- Oct 15, 2026RBBN
Ribbon Communications Inc.
Tax PaymentDirect14.8K shares at avg. $1.46$22K - Oct 15, 2026RBBN
Ribbon Communications Inc.
ExerciseDirect37.5K shares- - Jun 15, 2026RBBN
Ribbon Communications Inc.
AwardDirectRestructed Stock Unites (RSUs)
150K shares- - Jun 15, 2026RBBN
Ribbon Communications Inc.
AwardDirectPSUs
60K shares- - Jun 15, 2026RBBN
Ribbon Communications Inc.
AwardDirectPerformance-Based RSUs (PSUs)
90K shares- - May 15, 2026RBBN
Ribbon Communications Inc.
ExerciseDirect31.6K shares- - May 15, 2026RBBN
Ribbon Communications Inc.
ExerciseDirect26K shares- - May 15, 2026RBBN
Ribbon Communications Inc.
Tax PaymentDirect9.1K shares at avg. $2.63$24K - May 15, 2026RBBN
Ribbon Communications Inc.
ExerciseDirect23.1K shares- - May 15, 2026RBBN
Ribbon Communications Inc.
Tax PaymentDirect12.5K shares at avg. $2.63$33K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 15, 2026 | RBBN Ribbon Communications Inc. | Tax Payment | 14,756 | $1.46 | $21,544 | Direct |
| Oct 15, 2026 | RBBN Ribbon Communications Inc. | Exercise | 37,500 | - | $0 | Direct |
| Jun 15, 2026 | RBBN Ribbon Communications Inc. | Award Restructed Stock Unites (RSUs) | 150,000 | - | - | Direct |
| Jun 15, 2026 | RBBN Ribbon Communications Inc. | Award PSUs | 60,000 | - | - | Direct |
| Jun 15, 2026 | RBBN Ribbon Communications Inc. | Award Performance-Based RSUs (PSUs) | 90,000 | - | - | Direct |
| May 15, 2026 | RBBN Ribbon Communications Inc. | Exercise | 31,646 | - | $0 | Direct |
| May 15, 2026 | RBBN Ribbon Communications Inc. | Exercise | 26,043 | - | $0 | Direct |
| May 15, 2026 | RBBN Ribbon Communications Inc. | Tax Payment | 9,107 | $2.63 | $23,951 | Direct |
| May 15, 2026 | RBBN Ribbon Communications Inc. | Exercise | 23,146 | - | $0 | Direct |
| May 15, 2026 | RBBN Ribbon Communications Inc. | Tax Payment | 12,452 | $2.63 | $32,749 | Direct |
1-10 of 40 transactions