Harmonic (HLIT) Q1 2026 earnings review
Pure-Play Broadband Pivot Triggers Massive Revenue Acceleration
Harmonic has successfully transitioned into a pure-play broadband provider, and the initial results are striking. Following the agreement to divest its Video business, continuing operations delivered a 43% YoY revenue surge in 26Q1 to $121.7 million. This acceleration is underpinned by a staggering 78% growth in Rest-of-Market (RoM) customers and a record $582.1 million backlog. The structural market inflection for DOCSIS 4.0 is visibly underway, leading management to raise FY26 revenue guidance to $475-$495 million. While top-line momentum is stellar, underlying operating cash flow decelerated sharply and guided gross margins imply compression ahead, signaling that supply chain and tariff costs remain lingering macro headwinds.
🐂 Bull Case
Broadband revenue broke out of its sluggish 2025 trajectory, accelerating to 43% YoY growth. The cOS platform now serves 45.7 million modems across 150 deployments, proving that the long-awaited network upgrade supercycle has fully commenced.
Rest-of-Market bookings exceeded 50% of the Q1 total, and RoM revenue surged 78% YoY. Harmonic is successfully executing its strategy to reduce historical reliance on two massive North American Tier-1 accounts.
🐻 Bear Case
Despite Q1's strong 52.5% Non-GAAP gross margin, full-year guidance targets 50.0-51.5%. This implies a deceleration in profitability in coming quarters, driven by $2.3 million in expected tariff impacts and previously flagged memory cost inflation.
Operating cash flow plunged from $83.6 million in 25Q1 to just $31.7 million in 26Q1, almost entirely due to less favorable working capital movements (Accounts Receivable collections slowed drastically vs prior year).
⚖️ Verdict: 🟢
Bullish. The strategic divestiture of the Video segment reveals a high-growth broadband engine. With backlog up 87% YoY and full-year guidance raised, the top-line trajectory vastly outweighs near-term working capital noise and mild tariff impacts.
Key Themes
cOS Platform & DOCSIS 4.0 Ramp Accelerating
The DOCSIS 4.0 upgrade cycle has officially transitioned from a headwind of field trials to a massive tailwind of commercialization. Broadband revenue surged 43% YoY. The company commercially deployed its cOS solution with 150 customers (up from 129 a year ago), now serving 45.7 million cable modems. With multiple fiber wins adding to the momentum (fiber is now >14% of Appliance & Integration revenue), the core growth engine is firing on all cylinders.
Rest-of-Market (RoM) Diversification Scaling Rapidly
Harmonic is successfully shedding its historical over-reliance on its top two MSO accounts. Rest-of-Market bookings exceeded 50% of total 26Q1 bookings. Correspondingly, RoM revenue skyrocketed 78% YoY to $50.6 million, making up 42% of total broadband revenue. This structural diversification drastically reduces customer concentration risk and improves long-term revenue stability.
Video Divestiture Finalizes Pure-Play Transformation
Harmonic's sale of its Video business to MediaKind for $145 million in cash is slated to close in Q2 2026. Stripping out the low-growth video segment eliminates roughly $2.3 million of stranded quarterly corporate costs and sharpens management's focus. The pending nine-figure cash infusion dramatically fortifies the balance sheet, accelerating capacity for the $200 million share repurchase program.
Top 2 Customers Lagging the Corporate Average
If any segment grows significantly below the company average, it requires scrutiny. While the RoM segment exploded by 78%, Harmonic's legacy Top 2 customers grew at a decelerating relative pace of 26% YoY (from $56.5 million to $71.1 million). Because these massive anchor accounts lag the 43% corporate growth rate, any sudden Capex cuts or deployment delays from them could disproportionately impact the $582 million backlog conversion.
Macro Headwinds Forcing Margin Deceleration
Despite a strong 52.5% Non-GAAP gross margin in Q1, full-year FY26 guidance targets 50.0%-51.5%. This implies a deceleration in profitability for the rest of the year. Management explicitly baked $2.3 million in estimated tariff impacts into the outlook, compounding the surging memory costs flagged in late 2025. Pricing power does not appear robust enough to fully offset these supply chain realities.
Operating Cash Flow Contradicts Earnings Growth
A glaring red flag emerged in working capital: Operating Cash Flow reversed course, plummeting to $31.7 million from $83.6 million a year ago. This move is in direct opposition to Non-GAAP Net Income, which more than doubled YoY to $18.8 million. The root cause is a massive slowdown in Accounts Receivable collections, which provided only $3.2 million in cash this quarter versus $79.6 million in 25Q1. While likely a timing issue related to massive Q4 bookings, it degrades near-term earnings quality.
Other KPIs
Accelerating. Making up the bulk of Q1 revenue, this segment grew substantially YoY. Fiber products represented over 14% of this total, proving that the hardware upgrade cycle is in full swing alongside software adoption.
Stable. Represents a steady stream of recurring revenue. While vastly smaller than the appliance business, growing the software and service layer on top of the 45.7 million deployed modems remains crucial for long-term margin expansion.
Accelerating. The company bought back approximately 4.2 million shares in Q1, aggressively utilizing its strong balance sheet ahead of the $145 million cash infusion from the Video divestiture. This underscores management's confidence in the intrinsic value of the stock.
Guidance
Stable. The midpoint of $120 million represents a slight sequential deceleration from Q1's $121.7 million, but still constitutes massive 38% YoY growth against 25Q2 ($86.9 million). The DOCSIS 4.0 ramp continues unabated.
Accelerating. Management raised the full-year outlook based on record bookings and robust backlog conversion. The midpoint implies nearly 35% growth from FY25's $360.5 million.
Accelerating. Represents a massive jump in absolute profitability, driven by volume leverage and cOS license mix, even though gross margins face slight compression from memory and tariff costs.
Key Questions
Cash Conversion Cycle Deterioration
Given the $83.6 million to $31.7 million YoY plunge in operating cash flow specifically due to Accounts Receivable timing, what are your expected cash conversion cycles for the remainder of the year?
Margin Deceleration Components
Your FY26 gross margin guidance of 50.0-51.5% implies compression from Q1's 52.5%. Exactly how much of this deceleration is driven by structural product mix versus the $2.3 million estimated tariff impact and memory costs?
Rest-of-Market Margin Profile
With Rest-of-Market bookings now exceeding 50% of the Q1 total, what is the blended margin profile of these new international and fiber deployments compared to your legacy Top 2 accounts?
Capital Allocation Post-Divestiture
Following the impending $145 million cash infusion from the Video divestiture, do you plan to accelerate the $200 million share repurchase program, or are you evaluating M&A targets in the AI-operations space?