Calix (CALX) Q2 2026 Earnings: Operating Income $391K to $21.8M, Gross Margin Falls
The Hook
Calix $CALX just reported the cleanest quarter it has printed in three years. Operating income for the three months ended June 27, 2026 came in at $21.8 million, against $391 thousand in the same quarter a year earlier. That is more than 55 times larger. Net income swung from a $199 thousand loss to $17.1 million. Revenue grew 21 percent to $293.3 million while total operating expenses grew 1.7 percent.
And the stock closed at $36.85 on July 27, 2026, roughly 7 percent above its 52-week low of $34.26 and about half its 52-week high of $71.22 (source: stockanalysis.com, July 27, 2026). Something in the market's read does not match the income statement. The 10-Q, filed July 21, 2026, explains most of it - and the explanation is not the one the headline number suggests.
Company Snapshot
Calix sells a broadband delivery platform to communications service providers: access-network appliances, subscriber Wi-Fi appliances, a cloud software layer, and managed services it sells on a per-subscriber basis. Its customers are the roughly 1,600 regional operators, electric cooperatives, municipalities, fiber overbuilders and cable operators that build and run last-mile networks, plus a handful of large carriers. The company is based in San Jose, employed 1,921 people at December 31, 2025, and outsources all manufacturing to contract manufacturers concentrated in Asia.
This analysis works from the Form 10-Q for the quarter ended June 27, 2026, filed July 21, 2026, with prior-period and full-year figures from the FY2025 Form 10-K filed February 20, 2026. Calix reports as a single segment.
The Financial Story
The quarter, on its face, is excellent.
| Metric (Q2, three months) | Q2 2025 | Q2 2026 | Change |
|---|---|---|---|
| Revenue | $241.9M | $293.3M | +21% |
| Gross profit | $136.3M | $160.1M | +17% |
| Gross margin | 56.3% | 54.6% | -170 bps |
| Operating expenses | $135.9M | $138.3M | +1.7% |
| Operating income | $0.4M | $21.8M | +$21.5M |
| Net income | -$0.2M | $17.1M | +$17.3M |
Revenue added $51.4 million. Gross profit added $23.8 million. Operating expenses added $2.4 million. The difference, $21.5 million, is the entire operating income swing. That is textbook operating leverage: a fixed cost base absorbed by a bigger revenue base. Operating expenses fell from 56.2 percent of revenue to 47.1 percent in twelve months.
But look at why operating expenses were flat. The filing explains each line's variance itself, and stock-based compensation does a lot of the work:
| Operating expense line | Q2 2025 | Q2 2026 | Change | Filing's cited stock-comp change |
|---|---|---|---|---|
| Sales and marketing | $63.7M | $62.3M | -$1.3M | -$5.4M |
| Research and development | $45.8M | $52.8M | +$7.0M | -$0.6M |
| General and administrative | $26.5M | $23.2M | -$3.3M | -$2.7M |
| Total | $135.9M | $138.3M | +$2.4M | -$8.7M |
Add the three stock-compensation reductions the filing names and you get $8.7 million - roughly 41 percent of the $21.5 million operating income swing. Strip it out and the underlying cost base grew about $11 million, not $2.4 million. Every one of those three lines also cites increased headcount as an offsetting increase. Calix is not cutting costs. It is hiring, and a lower stock-compensation accrual is masking that in the reported number. Company-wide, stock compensation was $37.3 million in the first half of 2026 against $45.4 million a year earlier.
The margin is moving the wrong way, and the reason is unusual. Gross margin fell 170 basis points year over year, which the filing attributes "primarily related to increased component memory costs." The risk factors go further than most companies would: the technology industry "is currently experiencing significant supply constraints for memory components, driven in part by the reallocation of manufacturing capacity towards the global AI infrastructure build, which constraints may continue for years until new manufacturing capacity is built." Calix is a broadband-equipment company with no AI-datacenter business, and the AI capex cycle is showing up in its cost of goods sold. Its stated mitigations are advance purchasing and memory surcharges, and the filing flags "advance-purchased supply depletion" and "surcharge recovery" as future swing factors. In plain terms: it bought cheap memory ahead, and margin gets worse when that runs out.
The mix is also moving the wrong way for the software story. Appliance revenue grew 23 percent to $242.8 million; software and service revenue grew 16 percent to $50.5 million. Software and service fell to 17.2 percent of revenue from 18.1 percent - the mix shifted toward hardware. Software and service gross margin fell 200 basis points in the quarter and 550 basis points across the half, which the filing attributes to running a dual cloud environment while migrating customers from its second-generation to its third-generation platform. That is a transition cost rather than a structural problem, but it means the high-margin line is currently the drag, not the lift.
Cash conversion deteriorated while earnings improved. Operating cash flow for the first half was $31.1 million, down from $56.6 million a year earlier - a 45 percent decline in the same six months net income went from a $5.0 million loss to $28.3 million of profit. The gap is working capital: inventory rose $46.7 million "to support future revenue," receivables rose $37.0 million, partly offset by a $50.9 million increase in accounts payable. Inventory on the balance sheet stands at $180.5 million versus $154.6 million three months earlier. Some of that build is deliberate advance purchasing against the memory squeeze. Capital expenditures were $12.7 million, leaving about $18.4 million of first-half free cash flow against $28.3 million of reported net income.
The forward indicator is flat. Remaining performance obligations were $386.4 million at June 27, 2026, up 11.5 percent from $346.6 million a year earlier - but essentially unchanged from $385.0 million at December 31, 2025. Backlog is growing at roughly half the rate of revenue. Deferred revenue is $56.0 million.
Two more things worth flagging. One customer accounted for 12 percent of revenue in the quarter; the filing notes no customer exceeded 10 percent in the first half of 2026 or in either 2025 period, and the FY2025 10-K says no customer exceeded 10 percent in 2025, 2024 or 2023. That is a new concentration. And international revenue fell, to $15.6 million from $22.8 million, dropping to 5 percent of the total from 9 percent. All of the growth is domestic.
The balance sheet is genuinely clean. Total assets of $954.4 million, total liabilities of $244.4 million, stockholders' equity of $710.0 million, and no borrowings of any kind. Cash and marketable securities were $194.3 million at quarter end, down from $388.1 million at December 31, 2025, because Calix repurchased 5.0 million shares for $240.2 million in the first half - an average of roughly $48.05 a share against a July 27, 2026 close of $36.85. Shares outstanding fell to 62.96 million from 64.40 million a quarter earlier. Remaining buyback authorization is $94.1 million. A $161.8 million deferred tax asset shields cash taxes even as the book effective rate normalized to 27.5 percent from 105.8 percent a year ago.
Valuation: What It Is Worth As A Normal Business
At $36.85 (stockanalysis.com, July 27, 2026), Calix carries a market capitalization of about $2.32 billion. Net of $194.3 million in cash and securities and with no debt, enterprise value is roughly $2.13 billion. Trailing twelve-month figures, derived from the FY2025 10-K plus the two half-year 10-Q periods, are revenue of $1.111 billion, operating income of $61.2 million and net income of $51.2 million. That is 2.1 times sales, about 35 times EV to operating income, and about 45 times trailing GAAP earnings. Consensus is a Buy with a price target near $62 to $65 across published surveys (source: stockanalysis.com and public.com, July 2026).
A five-year discounted cash flow, holding the discount rate constant at 10.5 percent and terminal growth at 2.5 percent across all three cases so only the operating assumptions vary, taxing at 27 percent, and treating stock compensation as the real expense it is:
| Case | Revenue growth | Year-5 operating margin | Year-5 revenue | Implied value per share |
|---|---|---|---|---|
| Bear | 3% | 5% | $1.29B | about $11 |
| Base | 9% | 9% | $1.71B | about $20 |
| Bull | 15% | 13% | $2.24B | about $34 |
Even the bull case lands below today's price. A re-rating grid says the same thing from a different angle: put a 20 times multiple on operating income earned at various margins on the current $1.11 billion revenue base, and 8 percent margins imply about $31 a share, 10 percent about $38, and 12 percent about $45.
The gap between this range and the street's $62 is almost entirely one line item. Trailing twelve-month stock-based compensation was $79.9 million against $61.2 million of trailing operating income. Add it back and operating income becomes roughly $141 million, a 12.7 percent margin, and the enterprise trades at about 15 times - which is how a 19 times forward multiple and a $62 target get built. Whether Calix is expensive or cheap is not really a debate about broadband demand. It is a debate about whether you count stock compensation. Implied value under stated assumptions, not a price target, and not investment advice.
Risks
The filing's own risk language is the sharpest guide here. Memory component pricing is called out as driving "a significant portion of our cost of revenue," subject to constraints that "may continue for years," with mitigation that "may be only partially effective" - and a dedicated risk factor now warns of continued gross-margin fluctuation as "advance-purchased supply depletion" and "surcharge recovery" play out. Calix has no internal manufacturing and depends on a small number of contract manufacturers concentrated in Asia. It flags that "government-sponsored programs and U.S. federal government shutdowns could impact the timing and buying patterns" of its customers - and notably, the FY2025 10-K describes the approved federal broadband funding pool as "more than $40 billion," down from "more than $60 billion" in each of the two prior annual reports.
The second-order risks are in the numbers. Backlog is flat over two quarters while revenue compounds. One customer is now 12 percent of a quarter. International is shrinking in absolute dollars. And management has told you the expense line will rise: it expects research and development "to increase in absolute dollars in the short term as we accelerate the development of artificial intelligence functionality," and sales, marketing and administrative spend to grow in absolute dollars too. The operating leverage that produced this quarter requires revenue to keep outrunning a cost base that is deliberately being expanded.
The Bottom Line
The swing to profit is real and it is mostly volume. Revenue up 21 percent against operating expenses up 1.7 percent is a genuine fixed-cost absorption story, and management's stated cause for the appliance growth - taking footprint from legacy vendors and expanding inside the existing base - is a share-gain claim, not a subsidy claim. BEAD is not named anywhere in this 10-Q; the only reference is generic "government stimulus" as a reason for the North American focus.
But the reported swing is flattered. Roughly 40 percent of it came from a lower stock-compensation accrual, not from operations. Gross margin fell for a reason the company says may persist for years. The high-margin software line grew slower than hardware. Cash flow went down while earnings went up. And the backlog that should confirm the next four quarters has been flat for two.
What to watch in the Q3 filing: gross margin, and specifically whether the memory surcharges recover the cost; remaining performance obligations, which need to start compounding again; whether stock compensation stays down or reverts; and whether that 12 percent customer stays.
Every figure above traces to Calix's SEC filings, pulled from the RoboSystems shared data repository. Market prices, multiples and consensus figures are attributed inline with their source and date. Run your own queries on any public company's filings at robosystems.ai. New customers get 50% off your first month with code ROBO50.