Marmurek Eric S - Insider Non-Derivative Transactions at Ribbon Communications Inc. (RBBN) - (SEC)
Updated on January 3, 2026.
According to recent SEC insider information filed on Oct 15, 2025, Marmurek Eric S's relationship to Ribbon Communications Inc. (RBBN) is Officer (SVP, Deputy CFO and CAO), and currently has 456,575 shares of Common Stock.
The chart below shows the number of shares owned, and the table shows the recent insider transactions.
You can see similar information for other RBBN insiders.
Related Topics: SEC Topic List.
Data Source: SEC.
Marmurek Eric S - Insider Non-Derivative Transactions of RBBN Common Stock
Marmurek Eric S - Insider Non-Derivative Transactions at RBBN
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| Date | Transaction | No. of Shares | Price Per Share | Shares Owned After Transactions |
|---|---|---|---|---|
| Oct 16, 2025 | F -- (Common Stock) | 29512 | 3.81 | 427063 |
| Oct 16, 2025 | M -- (Common Stock) | 75000 | 0 | 456575 |
| May 17, 2025 | F -- (Common Stock) | 12452 | 3.62 | 381575 |
| May 17, 2025 | M -- (Common Stock) | 31645 | 0 | 394027 |
| Apr 19, 2025 | F -- (Common Stock) | 5254 | 3.58 | 362382 |
| Apr 19, 2025 | M -- (Common Stock) | 13354 | 0 | 367636 |
| Apr 18, 2025 | F -- (Common Stock) | 9142 | 3.53 | 354282 |
| Apr 18, 2025 | M -- (Common Stock) | 23234 | 0 | 363424 |
| Mar 16, 2025 | F -- (Common Stock) | 7321 | 3.95 | 320968 |
| Mar 16, 2025 | M -- (Common Stock) | 16399 | 0 | 328289 |
| Mar 16, 2025 | M -- (Common Stock) | 32154 | 0 | 353122 |
| Oct 19, 2024 | F -- (Common Stock) | 5255 | 3.56 | 311890 |
| Oct 19, 2024 | M -- (Common Stock) | 13355 | 0 | 317145 |
| Oct 18, 2024 | F -- (Common Stock) | 9142 | 3.38 | 303790 |
| Oct 18, 2024 | M -- (Common Stock) | 23234 | 0 | 312932 |
| Apr 19, 2024 | F -- (Common Stock) | 4895 | 2.57 | 289698 |
| Apr 19, 2024 | M -- (Common Stock) | 13354 | 0 | 294593 |
| Apr 18, 2024 | F -- (Common Stock) | 17069 | 2.61 | 281239 |
| Apr 18, 2024 | M -- (Common Stock) | 46469 | 0 | 298308 |
| Mar 16, 2024 | M -- (Common Stock) | 4116 | 0 | 251812 |
| Mar 16, 2024 | F -- (Common Stock) | 1554 | 2.83 | 251839 |
| Mar 16, 2024 | M -- (Common Stock) | 1581 | 0 | 253393 |
| Mar 16, 2024 | F -- (Common Stock) | 12932 | 3.95 | 340190 |
| Jan 19, 2024 | F -- (Common Stock) | 4447 | 2.84 | 247696 |
| Jan 19, 2024 | M -- (Common Stock) | 15000 | 0 | 252143 |
| Oct 19, 2023 | F -- (Common Stock) | 3251 | 2.15 | 237143 |
| Oct 19, 2023 | M -- (Common Stock) | 13355 | 0 | 240394 |
| Sep 16, 2023 | F -- (Common Stock) | 1002 | 2.83 | 227039 |
| Sep 16, 2023 | M -- (Common Stock) | 4117 | 0 | 228041 |
| Jun 17, 2023 | F -- (Common Stock) | 11744 | 2.96 | 223005 |
| Jun 17, 2023 | M -- (Common Stock) | 48231 | 0 | 234749 |
| Apr 19, 2023 | F -- (Common Stock) | 6503 | 2.74 | 186518 |
| Apr 19, 2023 | M -- (Common Stock) | 26710 | 0 | 193021 |
| Mar 17, 2023 | F -- (Common Stock) | 3730 | 3.54 | 166311 |
| Mar 17, 2023 | M -- (Common Stock) | 15432 | 0 | 170041 |
| Mar 16, 2023 | F -- (Common Stock) | 1220 | 3.71 | 133071 |
| Mar 16, 2023 | M -- (Common Stock) | 4116 | 0 | 134291 |
| Mar 16, 2023 | F -- (Common Stock) | 3392 | 3.71 | 141121 |
| Mar 16, 2023 | M -- (Common Stock) | 11442 | 0 | 144513 |
| Mar 16, 2023 | F -- (Common Stock) | 4819 | 3.71 | 154609 |
| Mar 16, 2023 | M -- (Common Stock) | 18307 | 0 | 159428 |
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