Calix (CALX) Q2 2026 earnings review
Record Top Line Masked by Severe Margin Compression
Calix delivered a top-line beat with record Q2 revenue of $293.3M (up 21% YoY). Software growth rebounded nicely following the Gen 3 platform migration. However, the income statement tells a painful story: Non-GAAP gross margin plummeted 240 basis points sequentially to 54.8% and is guided to fall another 280 bps to 52.0% in Q3. A massive industry-wide spike in memory component costs, driven by AI data center demand, has forced Calix to implement zero-margin customer surcharges. While management is controlling OpEx admirably, this aggressive margin compression outweighs the volume growth narrative in the near term.
🐂 Bull Case
After a transition period, Software & Service revenue hit a record $50.5M, up 7% sequentially. More importantly, non-GAAP software gross margin rebounded 810 bps sequentially to 63.8%.
Management's internal use of 'human-centric AI' is delivering real productivity. Non-GAAP operating expenses actually declined sequentially by $4.7M despite 5% sequential revenue growth.
🐻 Bear Case
The memory cost crisis is severe. From a peak of 58.0% in 25Q4, non-GAAP gross margin is guided to compress by an astonishing 600 basis points down to 52.0% by 26Q3.
Despite hyping the new platform's ability to unlock global sovereign clouds, International revenue fell 32% YoY and now represents just 5% of total sales.
⚖️ Verdict: ⚪
Neutral. The core business volume and RPO backlog remain robust, but an expected 52.0% gross margin in Q3 severely undermines the company's long-term profitability narrative until supply chain pressures ease.
Key Themes
Memory Surcharges Ravage Gross Margins
The biggest red flag this quarter is the sharp deceleration in profitability. Appliance non-GAAP gross margin fell 460 basis points sequentially to 52.9%. Management blames the AI data center build-out for squeezing memory chip supply. Instead of raising base prices, Calix is applying 'surcharges' that cover costs but carry zero profit. This artificially inflates revenue while crushing the gross margin percentage. With Q3 margin guided down to 52.0% (midpoint), the timeline for returning to the target 20% operating margin is severely delayed.
RPOs and Software Bounce Back
Following a sequential decline in Q1 due to the Gen 3 platform migration, Remaining Performance Obligations (RPO) rebounded, growing 3% sequentially to a record $386.4M. Current RPO grew 21% YoY to $162.1M. This stable trajectory confirms that the Q1 dip was a transition hiccup rather than a demand collapse. Management expects RPO growth to accelerate in H2 2026 as customers adopt Calix One 'agentic' workflows.
Internal AI Adoption Delivers Immediate OpEx Leverage
While selling AI to customers is the long-term story, Calix is successfully using AI internally to drive costs down today. Non-GAAP operating expenses dropped sequentially by $4.7M to $122.2M, bringing OpEx down to 42% of revenue (from 45% in Q1). Management explicitly cited 'early productivity gains from our human-centric AI investments.' This internal cost discipline is the only thing protecting EPS from the current gross margin collapse.
International Expansion Narrative Fails to Materialize
For several quarters, management has touted that the Gen 3 platform's sovereign cloud capabilities would unlock massive International growth. The data directly contradicts this: International revenue was just 5% of total sales in Q2, representing a 32% YoY decline. If the new platform was supposed to open global doors, those doors remain firmly shut.
Other KPIs
FCF improved from $6.5M in Q1, demonstrating stable cash conversion. However, the most notable capital movement was massive stock repurchases: $69.4M (1.6M shares) in Q2. As a result, total cash and investments dropped heavily to $194.3M (down $49.0M sequentially). Management continues to heavily prioritize buybacks over balance sheet accumulation.
Decelerating. DSO spiked 6 days sequentially and 18 days YoY. Management admitted this was due to shipping delays at the beginning of the quarter caused by the rollout of the new memory surcharges. This is a friction point in the sales cycle that requires monitoring.
Guidance
Stable. The $304M midpoint implies a 4% sequential increase and roughly 14-15% YoY growth. This aligns with management's reaffirmation that full-year FY26 revenue will land at the 'higher end' of their 15% to 20% annual growth target.
Decelerating sharply. The midpoint of 52.0% represents a staggering 280 bps sequential drop from Q2's 54.8%, and a 570 bps drop from 25Q3 (57.7%). Management warns that surcharges will continue to drag on the margin percentage, even if they neutralize absolute dollar impacts over time.
Decelerating. The $0.41 midpoint represents a sequential decline from Q2's $0.47, entirely driven by the anticipated gross margin collapse, partially offset by disciplined operating expenses.
Key Questions
The Missing BEAD Revenue
In Q1, management confidently promised 'tens of millions of dollars' in BEAD revenue for H2 2026. The Q2 stockholder letter did not mention BEAD once. Has this timeline slipped due to state-level delays?
Memory Surcharge Duration
You are grandfathering Q3 backlog at Q2 surcharge rates, absorbing some margin pain. When do you realistically expect the AI-driven memory supply crunch to ease, and what is the specific threshold to remove these surcharges?
International Expansion Disconnect
We were told the Calix One platform on Google Cloud would bypass data sovereignty issues and unlock International growth. Yet International sales fell 32% YoY. Are Tier 1 international operators rejecting the platform, or are sales cycles simply longer than anticipated?