Eric S. Marmurek serves as Executive at Sonus Networks, Inc., where they oversee executive responsibilities. Since joining the company, Eric S. Marmurek has executed 62 insider transactions totaling $81.9K, demonstrating a bearish approach to their equity position. Their most recent transaction on Oct 15, 2025 involved selling 29,512 shares valued at $112.4K.
Eric S. Marmurek currently holds 427,063 shares of Sonus Networks, Inc. (SONS), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Eric S. Marmurek has been a net seller of SONS stock. They have purchased $0 and sold $81.9K worth of shares.
Eric S. Marmurek's most recent insider trade was on Oct 15, 2025, when they sold 29,512 shares at $3.81 per share.
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| $N/A |
| Discretionary |
| Apr 18, 2024 | RBBN | $0 | Option Exercise | 13,354 | $N/A | Discretionary |
| Apr 18, 2024 | RBBN | $12.6K | Payment | 4,895 | $2.57 | Discretionary |
| Apr 17, 2024 | RBBN | $0 | Option Exercise | 46,469 | $N/A | Discretionary |
| Apr 17, 2024 | RBBN | $44.6K | Payment | 17,069 | $2.61 | Discretionary |
| Mar 15, 2024 | RBBN | $4.4K | Payment | 1,554 | $2.83 | Discretionary |
| Mar 15, 2024 | RBBN | $0 | Option Exercise | 4,116 | $N/A | Discretionary |
| Mar 15, 2024 | RBBN | $0 | Option Exercise | 1,581 | $N/A | Discretionary |
| Jan 18, 2024 | RBBN | $0 | Option Exercise | 15,000 | $N/A | Discretionary |
| Jan 18, 2024 | RBBN | $12.6K | Payment | 4,447 | $2.84 | Discretionary |
| Oct 18, 2023 | RBBN | $7.0K | Payment | 3,251 | $2.15 | Discretionary |
| Oct 18, 2023 | RBBN | $0 | Option Exercise | 13,355 | $N/A | Discretionary |
| Sep 15, 2023 | RBBN | $2.8K | Payment | 1,002 | $2.83 | Discretionary |
| Sep 15, 2023 | RBBN | $0 | Option Exercise | 4,117 | $N/A | Discretionary |
| Jun 16, 2023 | RBBN | $34.8K | Payment | 11,744 | $2.96 | Discretionary |
| Jun 16, 2023 | RBBN | $0 | Option Exercise | 48,231 | $N/A | Discretionary |
| Apr 18, 2023 | RBBN | $0 | Option Exercise | 26,710 | $N/A | Discretionary |
| Apr 18, 2023 | RBBN | $17.8K | Payment | 6,503 | $2.74 | Discretionary |
| Mar 16, 2023 | RBBN | $0 | Option Exercise | 15,432 | $N/A | Discretionary |
| Mar 16, 2023 | RBBN | $13.2K | Payment | 3,730 | $3.54 | Discretionary |
| Mar 15, 2023 | RBBN | $0 | Option Exercise | 18,307 | $N/A | Discretionary |
| Mar 15, 2023 | RBBN | $0 | Option Exercise | 11,442 | $N/A | Discretionary |
| Mar 15, 2023 | RBBN | $4.5K | Payment | 1,220 | $3.71 | Discretionary |
| Mar 15, 2023 | RBBN | $0 | Option Exercise | 4,116 | $N/A | Discretionary |
| Mar 15, 2023 | RBBN | $17.9K | Payment | 4,819 | $3.71 | Discretionary |
| Mar 15, 2023 | RBBN | $12.6K | Payment | 3,392 | $3.71 | Discretionary |
| Sep 16, 2022 | RBBN | $0 | Option Exercise | 15,432 | $N/A | Discretionary |
| Sep 16, 2022 | RBBN | $11.1K | Payment | 3,757 | $2.95 | Discretionary |
| Sep 15, 2022 | RBBN | $0 | Option Exercise | 4,117 | $N/A | Discretionary |