CALIX, INC 8-K

What Happened
Calix, Inc. announced on January 28, 2026 that it publicly released a stockholder letter and press release reporting its financial results for the quarter ended December 31, 2025. The stockholder letter (Exhibit 99.2) includes several non‑GAAP measures and provides a tabular reconciliation to the most directly comparable U.S. GAAP measures. The filing was signed by CFO Cory Sindelar.

Key Details

• Press release dated January 28, 2026 announced fourth quarter ended December 31, 2025 results.
• The stockholder letter includes non‑GAAP measures such as non‑GAAP gross margin, operating expenses, sales & marketing, R&D, G&A investments, non‑GAAP effective tax rate, non‑GAAP net income (and per share), and non‑GAAP free cash flow.
• Non‑GAAP measures exclude non‑cash stock‑based compensation, intangible asset amortization, and impacts from changes in income taxes; reconciliations to GAAP are provided in Exhibit 99.2.
• The company states these non‑GAAP metrics are used by management to evaluate performance and set goals; the presentation is not a substitute for U.S. GAAP results and may differ from similarly named measures at other companies.

Why It Matters
Investors should note Calix’s publication of quarterly results and emphasis on non‑GAAP metrics, which management says better reflect core operating performance by removing stock‑based compensation, amortization, and tax effects. While these measures can provide additional perspective on operational trends, the filing reiterates reconciliations to GAAP results and warns non‑GAAP figures may not be comparable across companies. Review both the GAAP results and the provided reconciliations in Exhibit 99.2 to get a complete view of Calix’s financial performance.