Marmurek Eric S (CIK 0001720721)

Latest company ownership

Shares held
75,000
Last filed at
Oct 17, 2025
Confidence Score
43.7
2025Q4
Confidence Score History
2018Q4 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Oct 15, 2025 Oct 17, 2025 Ribbon Communications Inc. CFO Sell 42.5 -29,512 -6.46% $112.4K
May 16, 2025 May 19, 2025 Ribbon Communications Inc. CFO Sell 46.3 -12,452 -3.16% $45.1K
Apr 17, 2025 Apr 22, 2025 Ribbon Communications Inc. CFO Sell 42.5 -14,396 -1.97% $51.1K
Mar 15, 2025 Mar 18, 2025 Ribbon Communications Inc. CFO Sell 42.5 -20,253 -2.97% $80K
Oct 17, 2024 Oct 21, 2024 Ribbon Communications Inc. CFO Sell 46.3 -14,397 -2.28% $49.6K
Apr 17, 2024 Apr 19, 2024 Ribbon Communications Inc. SVP, Finance & CAO Sell 42.5 -21,964 -3.70% $57.1K
Mar 15, 2024 Mar 18, 2024 Ribbon Communications Inc. SVP, Finance & CAO Sell 50.0 -1,554 -0.61% $4.4K
Jan 18, 2024 Jan 19, 2024 Ribbon Communications Inc. SVP, Finance & CAO Sell 46.3 -4,447 -1.76% $12.6K
Oct 18, 2023 Oct 23, 2023 Ribbon Communications Inc. SVP, Finance & CAO Sell 47.5 -3,251 -1.35% $7K
Sep 15, 2023 Sep 19, 2023 Ribbon Communications Inc. SVP, Finance & CAO Sell 52.5 -1,002 -0.44% $2.8K
Jun 16, 2023 Jun 20, 2023 Ribbon Communications Inc. SVP, Finance & CAO Sell 46.3 -11,744 -5.00% $34.8K
Apr 18, 2023 Apr 19, 2023 Ribbon Communications Inc. SVP, Finance & CAO Sell 46.3 -6,503 -3.37% $17.8K
Mar 15, 2023 Mar 17, 2023 Ribbon Communications Inc. SVP, Finance & CAO Sell 46.3 -13,161 -2.16% $48.2K
Sep 15, 2022 Sep 19, 2022 Ribbon Communications Inc. SVP, Finance & CAO Sell 46.3 -4,759 -1.88% $14.2K
Apr 15, 2022 Apr 18, 2022 Ribbon Communications Inc. SVP, Finance & CAO Sell 47.5 -1,474 -1.25% $4.6K
Mar 15, 2022 Mar 17, 2022 Ribbon Communications Inc. SVP, Finance & CAO Sell 51.3 -748 -0.24% $34.5K
Oct 15, 2021 Oct 19, 2021 Ribbon Communications Inc. SVP, Finance & CAO Sell 47.5 -1,474 -1.86% $9.4K
Sep 16, 2021 Sep 17, 2021 Ribbon Communications Inc. SVP, Finance & CAO Sell 46.3 -3,757 -4.88% $23.6K
Apr 15, 2021 Apr 16, 2021 Ribbon Communications Inc. SVP, CAO Sell 46.3 -1,474 -2.34% $12.5K
Mar 16, 2021 Mar 17, 2021 Ribbon Communications Inc. SVP, CAO Sell 42.5 -7,482 -11.62% $64.7K
Dec 8, 2020 Dec 10, 2020 Ribbon Communications Inc. SVP, CAO Sell 22.5 -8,304 -19.85% $59.7K
Nov 16, 2020 Nov 17, 2020 Ribbon Communications Inc. SVP, CAO Sell 47.5 -1,088 -2.53% $5.1K
Oct 15, 2020 Oct 16, 2020 Ribbon Communications Inc. SVP, CAO Sell 47.5 -1,474 -3.32% $5.8K
May 15, 2020 May 19, 2020 Ribbon Communications Inc. SVP and CAO Sell 46.3 -1,095 -2.78% $3.5K
Apr 15, 2020 Apr 17, 2020 Ribbon Communications Inc. SVP and CAO Sell 33.8 -3,422 -7.98% $10K
Nov 15, 2019 Nov 19, 2019 Ribbon Communications Inc. Principal Accounting Officer Sell 42.5 -1,102 -3.46% $3.3K
May 15, 2019 Nov 19, 2019 Ribbon Communications Inc. Principal Accounting Officer Sell 42.5 -1,109 -3.36% $5.4K
May 15, 2019 May 17, 2019 Ribbon Communications Inc. Principal Accounting Officer Sell 27.5 -1,109 -1.60% $5.4K
Mar 15, 2019 Mar 19, 2019 Ribbon Communications Inc. Principal Accounting Officer Sell 90.0 +5,989 22.21% $9.6K
Nov 15, 2018 Nov 19, 2018 Ribbon Communications Inc. Principal Accounting Officer Sell 26.3 -2,178 -7.47% $13.3K