[8-K] HARMONIC INC. Reports Material Event

Rhea-AI Filing Summary

Harmonic Inc. (HLIT) furnished an Item 2.02 report announcing a press release with its preliminary, unaudited financial results for the quarter ended September 26, 2025. The company also scheduled a conference call on November 3, 2025 to discuss these results.

The information is being furnished, not filed, under the Exchange Act and will not be incorporated by reference into other filings. The report includes Exhibit 99.1 (press release titled "Harmonic Announces Third Quarter 2025 Results") and Exhibit 104 (Cover Page Inline XBRL).

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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): November 3, 2025

HARMONIC INC.

(Exact name of Registrant as specified in its charter)

Delaware (State or other jurisdiction of incorporation) 000-25826 Commission File Number 77-0201147 (IRS Employer Identification No.)

2590 Orchard Parkway

San Jose, CA 95131

(Address of principal executive offices, including zip code)

(408) 542-2500

(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(s)	Name of each exchange on which registered
Common Stock, par value $0.001 per share	HLIT	The Nasdaq Global Select Market

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. ☐

Item 2.02. Results of Operations and Financial Condition.

On November 3, 2025, Harmonic Inc. ("Harmonic" or the “Company”) issued a press release regarding its preliminary unaudited financial results for the quarter ended September 26, 2025. In the press release, Harmonic also announced that it would be holding a conference call on November 3, 2025 to discuss its financial results for the quarter ended September 26, 2025. A copy of the press release is furnished as Exhibit 99.1 hereto, and the information in Exhibit 99.1 is incorporated herein by reference.

The information in this Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, and this Item 2.02 of this Current Report on Form 8-K and Exhibit 99.1 furnished herewith shall not be incorporated by reference into any filing by Harmonic under the Securities Act of 1933, as amended (the “Securities Act”), or under the Exchange Act.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit Number		Description
99.1		Press release of Harmonic Inc. dated November 3, 2025, entitled "Harmonic Announces Third Quarter 2025 Results."
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

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: November 3, 2025	HARMONIC INC.
	By:		/s/ Walter Jankovic
			Walter Jankovic
			Chief Financial Officer