Insiders who reported open-market trades in the last 12 months at the companies Eric S. Marmurek files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Eric S. Marmurek is a corporate insider, tracked as EVP, Chief Financial Officer of Ribbon Communications Inc. (RBBN). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Eric S. Marmurek last file a Form 4?
The most recent primary Form 4 on record is dated 17 June 2026, one of 7 filings going back to 2024.
Eric S. Marmurek is EVP, Chief Financial Officer of Ribbon Communications Inc. (RBBN). 7 SEC Form 4 filings on record going back to 2024, most recently on 17 June 2026.
Recent transactions
18
The latest 18 SEC Form 4 transactions reported by Eric S. Marmurek.
InsiderAlpha's records for Eric S. Marmurek go back to 2024: 7 primary Form 4 filings, an average of 2.3 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
