VIAVI SOLUTIONS INC.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended June 28, 2025

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission File Number 000-22874

Viavi Solutions Inc.

(Exact name of Registrant as specified in its charter)

1445 South Spectrum Blvd, Suite 102 , Chandler, Arizona 85286

(Address of principal executive offices including Zip code)

(408)404-3600

(Registrant’s telephone number, including area code)

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

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

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes ☐No ☒

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

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

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b).☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☐ No ☒

As of December 28, 2024, the last business day of the registrant’s most recently completed second fiscal quarter, the aggregate market value of the voting and non-voting common equity held by non-affiliates of the Registrant was approximately $2.2 billion, based upon the closing sale prices of the common stock as reported on the Nasdaq Stock Market LLC. Shares of common stock held by executive officers and directors have been excluded from this calculation because such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

As of July 26, 2025, the Registrant had 223,245,915 shares of common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Registrant’s Notice of Annual Meeting of Stockholders and Proxy Statement to be filed pursuant to Regulation 14A within 120 days after Registrant’s fiscal year end of June 28, 2025 are incorporated by reference into Part III of this Report.

FORWARD-LOOKING STATEMENTS

Statements contained in this Annual Report on Form 10-K for the year ended June 28, 2025 (Annual Report on Form 10-K), which we also refer to as the Report, which are not historical facts, are forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended. A forward-looking statement may contain words such as “anticipate,” “believe,” “can,” “can impact,” “could,” “continue,” “estimate,” “expect,” “intend,” “may,” “ongoing,” “plan,” “potential,” “projects,” “should,” “will,” “will continue to be,” “would,” or the negative thereof or other comparable terminology regarding beliefs, plans, expectations or intentions regarding the future. Forward-looking statements include statements, but are not limited to statements such as:

•Financial projections and expectations, including profitability of certain business units, synergies, benefits and other matters related to the acquisition of the high-speed ethernet, network security and channel emulation testing business lines of Spirent Communications plc, plans to reduce costs and improve efficiencies including through restructuring programs, the effects of seasonality on certain business units, the consolidation of the communication industry and continued reliance on key customers for a significant portion of our revenue, future sources of revenue, competition and pricing pressures, the future impact of certain accounting pronouncements, and our estimation of the potential impact and materiality of litigation;

•Sufficiency of our sources of funding for working capital, capital expenditures, contractual obligations, acquisitions, stock repurchases, debt repayments and other matters;

•Our expectations regarding demand for our products and services, including industry trends and technological advancements that may drive such demand, the role we will play in those advancements and our ability to benefit from such advancements;

•Our plans for growth and innovation opportunities;

•Our plans for continued development, use and protection of our intellectual property;

•Our strategies for achieving our current business objectives, including related risks and uncertainties;

•Our plans or expectations relating to investments, execution of capital allocation and debt management strategies, acquisitions, partnerships and other strategic opportunities;

•Our research and development plans and investments and the expected impact of such plans on our financial performance;

•Our expectations related to our products, including costs associated with the development of new products, product yields, quality and other issues;

•Our expectations regarding the impact of tariffs and our strategies for mitigating such impact;

•Our expectations related to future tax liabilities resulting from future tax legislation; and

•Our expectations related to macro-economic conditions, including the impact of inflation, fiscal tightening at central banks, changes in foreign exchange rates, the risk of increased tensions and trade actions, including global tariffs, ongoing geopolitical tensions including the conflict between Russia and Ukraine, the instability in the Middle East, on our business, operations and financial results.

Management cautions that forward-looking statements are based on current expectations and assumptions and are subject to risks and uncertainties that could cause our actual results to differ materially from those projected in such forward-looking statements. These forward-looking statements are only predictions and are subject to risks and uncertainties including those set forth in Part I, Item 1A “Risk Factors” and elsewhere in this Annual Report on Form 10-K and in other documents we file with the U.S. Securities and Exchange Commission. Moreover, neither we nor any other person assumes responsibility for the accuracy and completeness of these forward-looking statements. Forward-looking statements are made only as of the date of this Report and subsequent facts or circumstances may contradict, obviate, undermine or otherwise fail to support or substantiate such statements. We are under no duty to update any of the forward-looking statements after the date of this Form 10-K to conform such statements to actual results or changes in our expectations.