CALX 8-K: Q3 2025 results with non-GAAP metrics and exhibits

Rhea-AI Filing Summary

Calix, Inc. furnished an 8‑K stating it has publicly disseminated a stockholder letter and issued a press release with its financial results for the third quarter ended September 27, 2025. The materials discuss non‑GAAP metrics, including 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 share, and free cash flow, with reconciliations to U.S. GAAP provided.

The information is furnished under Item 2.02 and is not deemed filed under the Exchange Act. The press release is attached as Exhibit 99.1 and the stockholder letter with reconciliations as Exhibit 99.2.

8-K Event Classification

2 items: 2.02, 9.01

2 items

Item 2.02 Results of Operations and Financial Condition Financial

Disclosure of earnings results, typically an earnings press release or preliminary financials.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

 CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 29, 2025

CALIX, INC.

(Exact name of Registrant as specified in its charter)

Delaware

001-34674

68-0438710

(State or other jurisdiction of incorporation)

(Commission File No.)

(I.R.S. Employer Identification No.)

3155 Olsen Drive, Suite 450, San Jose, California

95117

(Address of principal executive offices)

(Zip Code)

(408) 514-3000

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class

Trading Symbol

Name of Each Exchange on Which Registered

Common Stock, par value $0.025 per share

CALX

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging Growth Company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act).  o

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Item 2.02     Results of Operations and Financial Condition.

On October 29, 2025, Calix, Inc. (the “Company”) issued a press release announcing it has publicly disseminated a stockholder letter with its financial results for the third quarter ended September 27, 2025. The press release is attached hereto as Exhibit 99.1. The stockholder letter, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference, includes reference to the non-GAAP measures of non-GAAP gross margin, non-GAAP operating expenses, non-GAAP sales and marketing investments, non-GAAP research and development investments, non-GAAP general and administrative investments, non-GAAP effective income tax rate, non-GAAP net income or profitability, non-GAAP net income per diluted common share and non-GAAP free cash flow. These non-GAAP measures are provided to enhance the reader’s understanding of the Company’s operating performance as they exclude non-cash stock-based compensation, intangible asset amortization and the impact from changes in income taxes, which the Company believes are not indicative of its core operating results. Management believes that the non-GAAP measures used in this stockholder letter provide investors with important perspectives into the Company’s ongoing business performance and management uses these non-GAAP measures to evaluate financial results and to establish operational goals. The presentation of these non-GAAP measures is not meant to be a substitute for results presented in accordance with U.S. GAAP, but rather should be evaluated in conjunction with those GAAP results. A reconciliation of the non-GAAP results to the most directly comparable U.S. GAAP results is contained in tabular form in Exhibit 99.2. The non-GAAP financial measures used by the Company may be calculated differently from, and therefore may not be comparable to, similarly titled measures used by other companies.

Such information shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and is not incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing.

Item 9.01     Financial Statements and Exhibits.

(d) Exhibits 

Exhibit No.						Description
99.1						Press Release, dated October 29, 2025 announcing third quarter 2025 financial results.
99.2						Stockholder Letter dated October 29, 2025 announcing financial results of the Company.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date:

October 29, 2025

CALIX, INC.

By:

/s/ Cory Sindelar

Cory Sindelar

Chief Financial Officer

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EXHIBIT INDEX

Exhibit No.						Description
99.1						Press Release, dated October 29, 2025 announcing third quarter 2025 financial results.
99.2						Stockholder Letter dated October 29, 2025 announcing financial results of the Company.

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FAQ

What did Calix (CALX) announce in its 8-K?

Calix furnished a press release and a stockholder letter detailing financial results for the quarter ended September 27, 2025.

Which period does the disclosure cover for CALX?

It covers the third quarter ended September 27, 2025.

What exhibits are included with the Calix 8-K?

Exhibit 99.1 is the press release and Exhibit 99.2 is the stockholder letter with financial results and reconciliations.

Are the Calix materials considered filed or furnished?

They are furnished under Item 2.02 and are not deemed filed under the Exchange Act.

What non-GAAP measures does Calix reference?

Measures include non-GAAP gross margin, operating expenses, S&M, R&D, G&A investments, effective tax rate, net income, EPS (diluted), and free cash flow.

Where can investors find GAAP to non-GAAP reconciliations?

Reconciliations are contained in Exhibit 99.2 (stockholder letter) in tabular form.