SEC CIK 1720721
Marmurek Eric S
Reported ownership across 1 company, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| RBBNview stock → | 566,450 | 2026-10-15 |
Position History — RBBN
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — RBBN
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-10-15 | Option exercise (derivative) | 37,500 | $0.00 | 0 |
| 2026-10-15 | Tax withholding | 14,756 | $1.46 | 566,450 |
| 2026-10-15 | Option exercise | 37,500 | — | 581,206 |
| 2026-06-15 | Grant / award (derivative) | 60,000 | $0.00 | 60,000 |
| 2026-06-15 | Grant / award (derivative) | 90,000 | $0.00 | 90,000 |
| 2026-06-15 | Grant / award (derivative) | 150,000 | $0.00 | 150,000 |
| 2026-05-15 | Option exercise (derivative) | 31,646 | $0.00 | 31,645 |
| 2026-05-15 | Option exercise (derivative) | 26,043 | $0.00 | 52,082 |
| 2026-05-15 | Option exercise (derivative) | 23,146 | $0.00 | 0 |
| 2026-05-15 | Tax withholding | 10,247 | $2.63 | 543,706 |
| 2026-05-15 | Option exercise | 26,043 | — | 553,953 |
| 2026-05-15 | Tax withholding | 12,452 | $2.63 | 527,910 |
| 2026-05-15 | Option exercise | 31,646 | — | 540,362 |
| 2026-05-15 | Tax withholding | 9,107 | $2.63 | 508,176 |
| 2026-05-15 | Option exercise | 23,146 | — | 517,823 |
| 2026-04-17 | Option exercise (derivative) | 48,328 | $0.00 | 0 |
| 2026-04-17 | Option exercise (derivative) | 25,651 | $0.00 | 0 |
| 2026-04-17 | Tax withholding | 10,092 | $2.71 | 494,677 |
| 2026-04-17 | Option exercise | 25,651 | — | 504,769 |
| 2026-04-17 | Tax withholding | 19,107 | $2.71 | 479,118 |
| 2026-04-17 | Option exercise | 48,328 | — | 498,135 |
| 2026-04-15 | Option exercise (derivative) | 37,500 | $0.00 | 37,500 |
| 2026-04-15 | Tax withholding | 14,756 | $2.48 | 449,807 |
| 2026-04-15 | Option exercise | 37,500 | — | 464,563 |
| 2025-12-15 | Grant / award (derivative) | 169,721 | $0.00 | 169,721 |
| 2025-10-15 | Option exercise (derivative) | 75,000 | $0.00 | 75,000 |
| 2025-10-15 | Tax withholding | 29,512 | $3.81 | 427,063 |
| 2025-10-15 | Option exercise | 75,000 | — | 456,575 |
| 2025-05-16 | Option exercise (derivative) | 31,645 | $0.00 | 0 |
| 2025-05-16 | Tax withholding | 12,452 | $3.62 | 381,575 |
| 2025-05-16 | Option exercise | 31,645 | — | 394,027 |
| 2025-05-15 | Grant / award (derivative) | 36,392 | $0.00 | 36,392 |
| 2025-05-15 | Grant / award (derivative) | 31,250 | $0.00 | 31,250 |
| 2025-05-15 | Grant / award (derivative) | 46,875 | $0.00 | 46,875 |
| 2025-05-15 | Grant / award (derivative) | 63,291 | $0.00 | 63,291 |
| 2025-05-15 | Grant / award (derivative) | 78,125 | $0.00 | 78,125 |
| 2025-04-18 | Option exercise (derivative) | 13,354 | $0.00 | 0 |
| 2025-04-18 | Option exercise | 13,354 | — | 367,636 |
| 2025-04-18 | Tax withholding | 5,254 | $3.58 | 362,382 |
| 2025-04-17 | Option exercise (derivative) | 23,234 | $0.00 | 0 |
| 2025-04-17 | Option exercise | 23,234 | — | 363,424 |
| 2025-04-17 | Tax withholding | 9,142 | $3.53 | 354,282 |
| 2025-03-15 | Option exercise (derivative) | 32,154 | $0.00 | 0 |
| 2025-03-15 | Option exercise (derivative) | 16,399 | $0.00 | 0 |
| 2025-03-15 | Option exercise | 16,399 | — | 328,289 |
| 2025-03-15 | Tax withholding | 7,321 | $3.95 | 320,968 |
| 2025-03-15 | Option exercise | 32,154 | — | 353,122 |
| 2024-10-18 | Option exercise (derivative) | 13,355 | $0.00 | 13,354 |
| 2024-10-18 | Tax withholding | 5,255 | $3.56 | 311,890 |
| 2024-10-18 | Option exercise | 13,355 | — | 317,145 |
| 2024-10-17 | Option exercise (derivative) | 23,234 | $0.00 | 23,234 |
| 2024-10-17 | Tax withholding | 9,142 | $3.38 | 303,790 |
| 2024-10-17 | Option exercise | 23,234 | — | 312,932 |
| 2024-10-15 | Grant / award (derivative) | 150,000 | $0.00 | 150,000 |
| 2024-05-15 | Grant / award (derivative) | 43,670 | $0.00 | 43,670 |
| 2024-05-15 | Grant / award (derivative) | 29,114 | $0.00 | 29,114 |
| 2024-05-15 | Grant / award (derivative) | 31,645 | $0.00 | 31,645 |
| 2024-04-18 | Option exercise (derivative) | 13,354 | $0.00 | 26,709 |
| 2024-04-18 | Option exercise | 13,354 | — | 294,593 |
| 2024-04-18 | Tax withholding | 4,895 | $2.57 | 289,698 |
| 2024-04-17 | Option exercise (derivative) | 46,469 | $0.00 | 46,468 |
| 2024-04-17 | Option exercise | 46,469 | — | 298,308 |
| 2024-04-17 | Tax withholding | 17,069 | $2.61 | 281,239 |
| 2024-03-15 | Option exercise (derivative) | 4,116 | $0.00 | 0 |
| 2024-03-15 | Option exercise (derivative) | 1,581 | $0.00 | 0 |
| 2024-03-15 | Tax withholding | 1,554 | $2.83 | 251,839 |
| 2024-03-15 | Option exercise | 4,116 | — | 251,812 |
| 2024-03-15 | Option exercise | 1,581 | — | 253,393 |
| 2024-03-15 | Tax withholding | 12,932 | $3.95 | 340,190 |
| 2024-01-18 | Option exercise (derivative) | 15,000 | $0.00 | 0 |
| 2024-01-18 | Option exercise | 15,000 | $0.00 | 252,143 |
| 2024-01-18 | Tax withholding | 4,447 | $2.84 | 247,696 |
| 2023-10-18 | Option exercise (derivative) | 13,355 | $0.00 | 40,063 |
| 2023-10-18 | Tax withholding | 3,251 | $2.15 | 237,143 |
| 2023-10-18 | Option exercise | 13,355 | $0.00 | 240,394 |
| 2023-09-15 | Option exercise (derivative) | 4,117 | $0.00 | 4,117 |
| 2023-09-15 | Tax withholding | 1,002 | $2.83 | 227,039 |
| 2023-09-15 | Option exercise | 4,117 | $0.00 | 228,041 |
| 2023-06-16 | Option exercise (derivative) | 48,231 | $0.00 | 0 |
| 2023-06-16 | Tax withholding | 11,744 | $2.96 | 223,005 |
| 2023-06-16 | Option exercise | 48,231 | $0.00 | 234,749 |
| 2023-04-18 | Option exercise (derivative) | 26,710 | $0.00 | 53,418 |
| 2023-04-18 | Option exercise | 26,710 | $0.00 | 193,021 |
| 2023-04-18 | Tax withholding | 6,503 | $2.74 | 186,518 |
| 2023-04-17 | Grant / award (derivative) | 55,762 | $0.00 | 55,762 |
| 2023-04-17 | Grant / award (derivative) | 37,175 | $0.00 | 37,175 |
| 2023-04-17 | Grant / award (derivative) | 92,937 | $0.00 | 92,937 |
| 2023-03-16 | Option exercise (derivative) | 15,432 | $0.00 | 0 |
| 2023-03-16 | Option exercise | 15,432 | — | 170,041 |
| 2023-03-16 | Tax withholding | 3,730 | $3.54 | 166,311 |
| 2023-03-15 | Option exercise (derivative) | 18,307 | $0.00 | 0 |
| 2023-03-15 | Option exercise (derivative) | 4,116 | $0.00 | 8,233 |
| 2023-03-15 | Option exercise (derivative) | 11,442 | $0.00 | 0 |
| 2023-03-15 | Option exercise | 18,307 | — | 159,428 |
| 2023-03-15 | Option exercise | 11,442 | — | 144,513 |
| 2023-03-15 | Tax withholding | 1,220 | $3.71 | 133,071 |
| 2023-03-15 | Option exercise | 4,116 | — | 134,291 |
| 2023-03-15 | Tax withholding | 4,819 | $3.71 | 154,609 |
| 2023-03-15 | Tax withholding | 3,392 | $3.71 | 141,121 |
| 2023-01-17 | Grant / award (derivative) | 15,000 | $0.00 | 15,000 |
| 2022-09-16 | Option exercise (derivative) | 15,432 | — | 15,432 |
| 2022-09-16 | Option exercise | 15,432 | — | 133,932 |
| 2022-09-16 | Tax withholding | 3,757 | $2.95 | 130,175 |
| 2022-09-15 | Option exercise (derivative) | 4,117 | — | 12,349 |
| 2022-09-15 | Option exercise | 4,117 | — | 119,502 |
| 2022-09-15 | Tax withholding | 1,002 | $3.10 | 118,500 |
| 2022-06-15 | Grant / award (derivative) | 32,154 | $0.00 | 32,154 |
| 2022-06-15 | Grant / award (derivative) | 48,231 | $0.00 | 48,231 |
| 2022-06-15 | Grant / award (derivative) | 48,231 | $0.00 | 48,231 |
| 2022-04-18 | Grant / award (derivative) | 80,128 | $0.00 | 80,128 |
| 2022-04-15 | Option exercise (derivative) | 6,056 | $3.11 | 0 |
| 2022-04-15 | Option exercise | 6,056 | — | 117,778 |
| 2022-04-15 | Tax withholding | 1,474 | $3.11 | 116,304 |
| 2022-03-16 | Option exercise (derivative) | 15,432 | $0.00 | 30,864 |
| 2022-03-16 | Tax withholding | 3,663 | $2.99 | 111,772 |
| 2022-03-16 | Option exercise | 15,432 | — | 115,385 |
| 2022-03-15 | Option exercise (derivative) | 11,047 | $0.00 | 0 |
| 2022-03-15 | Option exercise (derivative) | 8,234 | $0.00 | 16,466 |
| 2022-03-15 | Tax withholding | 8,386 | $2.81 | 99,953 |
| 2022-03-15 | Option exercise | 11,047 | — | 108,339 |
| 2022-03-15 | Grant / award | 11,301 | — | 97,292 |
| 2022-03-15 | Option exercise | 8,234 | — | 85,991 |
| 2021-10-15 | Option exercise (derivative) | 6,056 | $0.00 | 6,056 |
| 2021-10-15 | Option exercise | 6,056 | — | 79,231 |
| 2021-10-15 | Tax withholding | 1,474 | $6.35 | 77,757 |
| 2021-09-16 | Option exercise (derivative) | 15,432 | $0.00 | 46,296 |
| 2021-09-16 | Option exercise | 15,432 | — | 76,932 |
| 2021-09-16 | Tax withholding | 3,757 | $6.28 | 73,175 |
| 2021-04-15 | Option exercise (derivative) | 6,057 | $0.00 | 12,112 |
| 2021-04-15 | Option exercise | 6,057 | — | 62,974 |
| 2021-04-15 | Tax withholding | 1,474 | $8.45 | 61,500 |
| 2021-03-16 | Option exercise (derivative) | 30,865 | $0.00 | 61,728 |
| 2021-03-16 | Tax withholding | 7,482 | $8.65 | 56,917 |
| 2021-03-16 | Option exercise | 30,865 | $0.00 | 64,399 |
| 2021-03-15 | Grant / award (derivative) | 14,820 | $0.00 | 14,820 |
| 2021-03-15 | Grant / award (derivative) | 9,880 | $0.00 | 9,880 |
| 2021-03-15 | Grant / award (derivative) | 24,700 | $0.00 | 24,700 |
| 2021-02-26 | Grant / award (derivative) | 9,085 | $0.00 | 11,301 |
| 2021-02-26 | Grant / award (derivative) | 11,442 | $0.00 | 11,442 |
| 2020-12-08 | Open-market sale | 8,304 | $7.19 | 33,534 |
| 2020-11-16 | Tax withholding | 1,088 | $4.67 | 41,838 |
| 2020-10-15 | Option exercise (derivative) | 6,056 | $0.00 | 18,169 |
| 2020-10-15 | Tax withholding | 1,474 | $3.92 | 42,926 |
| 2020-10-15 | Option exercise | 6,056 | — | 44,400 |
| 2020-06-19 | Grant / award (derivative) | 18,307 | $0.00 | 18,307 |
| 2020-05-15 | Open-market sale | 1,095 | $3.24 | 38,344 |
| 2020-04-15 | Option exercise (derivative) | 12,113 | $0.00 | 24,225 |
| 2020-04-15 | Option exercise | 12,113 | — | 42,861 |
| 2020-04-15 | Open-market sale | 3,422 | $2.92 | 39,439 |
| 2020-03-16 | Grant / award (derivative) | 92,593 | $0.00 | 92,593 |
| 2020-02-28 | Grant / award (derivative) | 2,216 | $0.00 | 2,216 |
| 2019-11-15 | Open-market sale | 1,102 | $2.99 | 30,748 |
| 2019-05-15 | Tax withholding | 1,109 | $4.85 | 68,188 |
| 2019-05-15 | Open-market sale | 1,109 | $4.85 | 31,850 |
| 2019-04-15 | Grant / award (derivative) | 36,338 | $0.00 | 36,338 |
| 2019-04-15 | Grant / award | 36,338 | $0.00 | 69,297 |
| 2019-03-15 | Tax withholding | 1,834 | $5.22 | 32,959 |
| 2019-03-15 | Grant / award | 7,823 | $0.00 | 34,793 |
| 2018-11-15 | Tax withholding | 2,178 | $6.12 | 26,970 |
| 2017-11-15 | Grant / award | 26,833 | $0.00 | 29,148 |
| 2017-10-27 | — | — | — | 2,315 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.