$HLIT: The Boring Telecom Stock Monopolizing AI Bandwidth

Asymmetrical Bets · Asymmetrical Bets · May 25, 2026 at 21:00 · ⏱ 11 min read  | Read on Substack ↗
Summary
Harmonic (HLIT) is a near-monopoly provider of software for cable broadband upgrades, riding a mandatory industry-wide DOCSIS 4.0 cycle and surging upstream traffic from AI applications. The article argues that a shift from hardware to software margins, a record backlog, and a pending divestiture position the stock for a re-rating, despite a 50%+ year-to-date gain.
  • •Harmonic controls over 95% of the virtualized CMTS market, with every major U.S. cable operator (Comcast, Charter, Cox, Altice) running its cOS software.
  • •The DOCSIS 4.0 upgrade cycle requires deploying cOS licenses across more than 100 million homes over the next few years, driven by fiber competition and AI bandwidth demands.
  • •Q1 2026 broadband revenue of $121.7 million beat guidance by 16%, and backlog surged 87% YoY to $582.1 million, covering 1.2x full-year revenue guidance.
  • •Software mix rose from 8% of revenue in 2022 to an estimated 38% by 2028, boosting blended gross margins from 38% to 52.5% in Q1 2026.
  • •Harmonic is selling its legacy Video segment to MediaKind for $145 million, expected to close by June 2026, making it a pure-play broadband software company.
  • •Diversification is improving: Rest of Market revenue grew 78% YoY to 42% of total, reducing reliance on Comcast and Charter.
Read time 11 min
Length 11,596 chars
Category finance
Trade Ideas
Asymmetrical Bets Substack author, Asymmetrical Bets
Harmonic is a software monopoly with 95% market share in virtualized CMTS, benefiting from the mandatory DOCSIS 4.0 upgrade cycle and growing AI bandwidth demand, with accelerating revenue, margin exp
Harmonic is a software monopoly with 95% market share in virtualized CMTS, benefiting from the mandatory DOCSIS 4.0 upgrade cycle and growing AI bandwidth demand, with accelerating revenue, margin expansion, and a pending divestiture that will transform it into a pure-play broadband software company.
HLIT HIGH
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This newsletter, published May 25, 2026, features Asymmetrical Bets discussing HLIT. 1 trade idea extracted by AI with direction and confidence scoring.

Speakers: Asymmetrical Bets  · Tickers: HLIT