---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-043511"
form_type: "8-K"
ticker: "RBBN"
cik: "0001708055"
company_name: "Ribbon Communications Inc."
filed_at: "2026-04-15T23:59:59+00:00"
generated_at: "2026-05-15T06:08:01.153222+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Ribbon appoints Louis Silver to Board of Directors, board expands to nine

## Summary
- Louis Silver appointed to Board effective April 15, 2026; board increases to nine members, six independent.
- Silver is designee of Swarth Investments Ltd. under stockholders' agreement.
- Silver brings over 25 years board experience; currently serves on Ceva, Inc. board as Audit Committee Chairman.
- He will receive $60k annual retainer and RSUs valued at ~$170k pro-rated, plus potential committee retainers.

## SEC filing metadata
- accession: 0001104659-26-043511
- form_type: 8-K
- ticker: RBBN
- cik: 0001708055
- company_name: Ribbon Communications Inc.
- filed_at: 2026-04-15T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1708055/000110465926043511/0001104659-26-043511-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1708055/000110465926043511/tm2611696d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-043511
- JSON: https://secwatch.observer/filing/0001104659-26-043511.json
- Plain text: https://secwatch.observer/filing/0001104659-26-043511.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.