---
schema_version: "secwatch.filing_event.v1"
accession: "0000851310-21-000048"
form_type: "8-K"
ticker: "HLIT"
cik: "0000851310"
company_name: "HARMONIC INC."
filed_at: "2021-11-01T23:59:59+00:00"
generated_at: "2026-06-28T15:59:43.721147+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Harmonic Q3 revenue up 33% YoY to $126.3M; CableOS modems served up 77%

## Summary
- Revenue $126.3M (up 33% YoY); Cable Access +43%, Video +26%.
- GAAP net income $1.5M ($0.01 EPS) vs loss $5.4M ($0.06 loss) a year ago.
- Non-GAAP EPS $0.09 vs $0.03 YoY; adjusted EBITDA $14.8M vs $7.2M.
- CableOS deployed with 68 customers (+79%); modems served 3.9M (+77%).
- Cash $128.4M (up $57.6M YoY); backlog and deferred revenue $333.3M.

## SEC filing metadata
- accession: 0000851310-21-000048
- form_type: 8-K
- ticker: HLIT
- cik: 0000851310
- company_name: HARMONIC INC.
- filed_at: 2021-11-01T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/851310/000085131021000048/0000851310-21-000048-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/851310/000085131021000048/hlit-20211101.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000851310-21-000048
- JSON: https://secwatch.observer/filing/0000851310-21-000048.json
- Plain text: https://secwatch.observer/filing/0000851310-21-000048.txt

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