Business Context and Reporting Period
Company: CALIX, INC.
Filing Type: Form 8-K (Current Report)
Date of Report: April 21, 2026
Reporting Period: First quarter ended March 28, 2026
Context: The Company issued a press release and stockholder letter announcing financial results for the first quarter of 2026. The filing serves to publicly disseminate these results and includes references to various non-GAAP financial measures.
Key Financial Metrics
The provided filing text does not contain specific numerical values for revenue, profit, cash flow, margins, debt, or liquidity. The document references the existence of these metrics in attached exhibits (Exhibit 99.1 and Exhibit 99.2) but does not list the figures within the body of the 8-K text.
- GAAP Results: Referenced as available in attached exhibits; specific values not provided in text.
- Non-GAAP Measures Referenced: Non-GAAP gross margin, operating expenses, sales and marketing investments, research and development investments, general and administrative investments, effective income tax rate, net income/profitability, net income per diluted common share, and free cash flow.
- Adjustments: Non-GAAP measures exclude non-cash stock-based compensation, intangible asset amortization, and impacts from changes in income taxes.
Material Changes
The filing text does not provide specific data regarding material changes versus the prior comparable period. It only confirms the announcement of results for the quarter ended March 28, 2026.
Guidance, Outlook, and Management Commentary
Management Commentary: Management utilizes the referenced non-GAAP measures to evaluate ongoing business performance and establish operational goals. They believe these measures provide important perspectives into core operating results by excluding items not indicative of core performance.
Reconciliation: A reconciliation of non-GAAP results to the most directly comparable U.S. GAAP results is contained in tabular form in Exhibit 99.2.
Risks and Contingencies: The filing notes that non-GAAP financial measures may be calculated differently from similarly titled measures used by other companies and are not meant to be a substitute for U.S. GAAP results. The information is not deemed "filed" for purposes of Section 18 of the Exchange Act.
Investor Verification Checklist
- Review Exhibit 99.1 (Press Release) for specific GAAP revenue, net income, and cash flow figures for Q1 2026.
- Review Exhibit 99.2 (Stockholder Letter) for the detailed reconciliation between GAAP and non-GAAP metrics.
- Verify the specific adjustments made for stock-based compensation and intangible asset amortization to understand the variance between GAAP and non-GAAP profitability.
- Compare Q1 2026 results against Q1 2025 figures (not included in this text) to assess year-over-year growth or decline.