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): September 4, 2014

SEACHANGE INTERNATIONAL, INC.

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number including area code: (978) 897-0100

No change since last report

(Former Name or 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 (see General Instruction A.2. below):

Attached as Exhibit 99.1, and incorporated by reference, is a copy of the press release issued by SeaChange International, Inc. (“SeaChange”) dated September 4, 2014, reporting SeaChange’s financial results for the fiscal quarter ended July 31, 2014.

The information contained in this Item 2.02 and Exhibit 99.1 attached and incorporated herein by reference is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. This information shall not be incorporated by reference into any filing with the U.S. Securities and Exchange Commission made by SeaChange, whether made before or after the date hereof, regardless of any general incorporation language in such filings.

(d) Exhibits

The following Exhibit is attached to this report:

SIGNATURE

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.

Dated: September 4, 2014

EXHIBIT INDEX

Exhibit 99.1

SEACHANGE INTERNATIONAL REPORTS

SECOND QUARTER FISCAL 2015 RESULTS

ACTON, Mass. (Sept. 4, 2014) – SeaChange International, Inc. (NASDAQ: SEAC), a leading global multi-screen video software innovator, today reported second quarter fiscal 2015 revenue of $29.8 million and a non-GAAP operating loss of $2.8 million, or $0.08 per basic share, from continuing operations. In comparison, second quarter fiscal 2014 revenue was $37.4 million and non-GAAP operating income was $3.4 million, or $0.10 per fully diluted share, from continuing operations. The Company posted a U.S. GAAP operating loss of $5.2 million, or $0.15 per basic share for the second quarter of fiscal 2015, compared to a U.S. GAAP income from operations for the second quarter of fiscal 2014 of $0.5 million, or $0.01 per fully diluted share. The Company’s U.S. GAAP second quarter fiscal 2015 results include non-GAAP charges of $2.4 million, which consisted primarily of stock-based compensation and amortization of intangible assets from prior acquisitions.

For the first six months of fiscal 2015, the Company posted revenue of $54.2 million and a non-GAAP operating loss of $10.0 million, compared to revenue of $72.9 million and non-GAAP operating income of $4.6 million in the same prior period. The Company posted a U.S. GAAP loss from operations for the first six months of fiscal 2015 of approximately $15.3 million, compared to a U.S. GAAP loss from operations of $1.3 million for the same prior period.

-more-

SeaChange Q2 FY15 Results/Page 2

“We’re pleased to have achieved second quarter revenues at the high end of our guidance and to have significantly lowered our non-GAAP operating loss to $0.08 per share,” said Raghu Rau, Chief Executive Officer, SeaChange. “Notably, we received the signed contract for one of our European design wins with the goal of launching both Adrenalin and Nucleus by the third quarter of 2015. Also, a large multi-country service provider began the field trial of its new Nucleus-based video gateway platform and is on track for commercial launch later this year. Our results were also fueled by upgrades of existing Adrenalin deployments for large service providers in North America, Latin America and Asia Pacific. We also delivered our Infusion linear advertising products to three of the largest U.S. cable and telco video service providers in the second quarter.”

“As SeaChange announced earlier today, we signed a contract during the third quarter to deploy and manage our SeaChange Cloud Adrenalin service for BBC Worldwide’s online BBC Store,” Rau continued. “The BBC Store will make this television provider’s programs available online to consumers on the multi-screen devices they choose. We’re very pleased to make SeaChange’s first cloud OTT deployment with this prestigious customer and we anticipate initial revenue recognition in early 2015.”

Commenting on the Company’s outlook, Anthony Dias, Chief Financial Officer, SeaChange, stated, “While there has been a significant improvement in the anticipated receipt of customer acceptances for our new products, shifts in the timing of deployments planned for the second half of the year, along with some residual acceptance delays, will result in a more back-end loaded year. As such, we expect our third quarter fiscal 2015 revenues to be in the range of $29 million to $32 million and non-GAAP operating loss to be between $0.05 and $0.09 per basic share. For the full fiscal year 2015, SeaChange is narrowing revenue guidance to a range of $125 million to $130 million, and non-GAAP operating results to a range of a loss of $0.12 per share to operating income of $0.02 per share.”

SeaChange ended the second quarter of fiscal 2015 with cash, cash equivalents and marketable securities of $110.9 million and no debt outstanding, compared to $116.6 million at the close of the first quarter of fiscal 2015. During the second quarter, the Company repurchased $2.0 million of its outstanding shares under its $40 million stock buyback authorization.

-more-

SeaChange Q2 FY15 Results/Page 3

The Company will host a conference call to discuss its second quarter fiscal 2015 results at 5:00 p.m. ET today, Thursday, September 4, 2014. The call may be accessed at 877-407-8037 (U.S.) and 201-689-8037 (international) and via live webcast at www.schange.com/IR. A replay of the conference call will be available by phone through September 18, 2014 at 877-660-6853 (U.S.) or 201-612-7415 (international), conference ID 1358-7652. The webcast will be archived on the investor relations section of the Company’s website at www.schange.com/IR.

About SeaChange International

Ranked among the top 250 software companies in the world, SeaChange International, Inc. (NASDAQ: SEAC) enables transformative multi-screen video services through an open, cloud-based, intelligent software platform trusted by cable, telco and mobile operators globally. Personalized and fully monetized video experiences anytime on any device, in the home and everywhere, are the product of the Company’s superior multi-screen, advertising and video gateway software products.

SeaChange’s customers include many of the world’s most powerful media brands including all major cable operators in the Americas and Europe, and the largest telecom companies in the world. Headquartered in Acton, Massachusetts, SeaChange is TL 9000 certified and has product development, support and sales offices around the world. Visit www.schange.com.

-more-

SeaChange Q2 FY15 Results/Page 4

Safe Harbor Provision

Any statements contained in this press release that do not describe historical facts, including without limitation statements regarding future financial performance, next generation products and customer upgrades, and the repurchase of the Company’s shares, are neither promises nor guarantees and may constitute forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. Any such forward-looking statements contained herein are based on current assumptions and expectations, but are subject to a number of risks and uncertainties that may cause actual results to differ materially from expectations. Factors that could cause actual future results to differ materially from current expectations include the following: the continued spending by the Company’s customers on video systems and services; the continued development of the multi-screen video market; the Company’s ability to successfully introduce new products or enhancements to existing products and the rate of decline in revenue attributable to our legacy products; worldwide economic cycles; measures taken to address the variability in the market for our products and services; uncertainties introduced by our prior evaluation of strategic alternatives; the Company’s transition to being a company that primarily provides software solutions; the loss of one of the Company’s large customers; the cancellation or deferral of purchases of the Company’s products; the length of the Company’s sales cycles; the timing of revenue recognition of new products due to customer integration and acceptance requirements; any decline in demand or average selling prices for our products; the Company’s ability to manage its growth; the risks associated with international operations; the ability of the Company and its intermediaries to comply with the Foreign Corrupt Practices Act; compliance with conflict minerals regulations; foreign currency fluctuation; the Company’s ability to protect its intellectual property rights and the expenses that may be incurred by the Company to protect its intellectual property rights; an unfavorable result of current or future litigation; content providers limiting the scope of content licensed for use in the video-on-demand market or other limitations in materials we use to provide our products and services; the risks associated with purchasing material components from sole suppliers and using a limited number of third-party manufacturers; the Company’s ability to obtain necessary licenses or distribution rights for third-party technology; the Company’s ability to compete in its marketplace; the Company’s ability to respond to changing technologies; the impact of acquisitions, divestitures or investments made by the Company; the impact of changes in the market on the value of our investments; changes in the regulatory environment; the Company’s ability to hire and retain highly skilled employees; the ability of the Company to manage and oversee the outsourcing of engineering work; the security measures of the Company are breached and customer data or our data is obtained unlawfully; service interruptions or delays from our third-party data center hosting facilities; and the effectiveness of the Company’s disclosure controls and procedures and internal controls over financial reporting.

Further information on factors that could cause actual results to differ from those anticipated is detailed in various publicly available documents made by the Company from time to time with the Securities and Exchange Commission, including but not limited to, those appearing under the caption “Certain Risk Factors” in the Company’s Annual Report on Form 10-K filed on April 4, 2014. Any forward-looking statements should be considered in light of those factors. The Company cautions readers not to place undue reliance on any such forward-looking statements, which speak as of the date they are made. The Company disclaims any obligation to publicly update or revise any such statements to reflect any change in Company expectations or events, conditions or circumstances on which any such statements may be based, or that may affect the likelihood that actual results may differ from those set forth in the forward-looking statements.

-more-

SeaChange Q2 FY15 Results/Page 5

SeaChange International, Inc.

Condensed Consolidated Balance Sheets

(Amounts in thousands)

-more-

SeaChange Q2 FY15 Results/Page 6

SeaChange International, Inc.

Condensed Consolidated Statements of Operations

(Unaudited, amounts in thousands, except per share data)

-more-

SeaChange Q2 FY15 Results/Page 7

SeaChange International, Inc.

Condensed Consolidated Statements of Cash Flows

(Unaudited, amounts in thousands)

-more-

SeaChange Q2 FY15 Results/Page 8

Use of Non-GAAP Financial Information

We define non-GAAP (loss) income from operations as U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) operating (loss) income plus stock-based compensation expenses, amortization of intangible assets, earn-outs and change in fair value of earn-outs, professional fees associated with acquisitions, divestitures, litigation and strategic alternatives and severance and other restructuring costs. We discuss non-GAAP (loss) income from operations in our quarterly earnings releases and certain other communications as we believe non-GAAP (loss) income from operations is an important measure that is not calculated according to U.S. GAAP. We use non-GAAP (loss) income from operations in internal forecasts and models when establishing internal operating budgets, supplementing the financial results and forecasts reported to our Board of Directors, determining a component of bonus compensation for executive officers and other key employees based on operating performance and evaluating short-term and long-term operating trends in our operations. We believe that non-GAAP (loss) income from operations assists in providing an enhanced understanding of our underlying operational measures to manage the business, to evaluate performance compared to prior periods and the marketplace, and to establish operational goals. We believe that these non-GAAP financial adjustments are useful to investors because they allow investors to evaluate the effectiveness of the methodology and information used by management in our financial and operational decision-making.

Non-GAAP (loss) income from operations is a non-GAAP financial measure and should not be considered in isolation or as a substitute for financial information provided in accordance with U.S. GAAP. This non-GAAP financial measure may not be computed in the same manner as similarly titled measures used by other companies. We expect to continue to incur expenses similar to the non-GAAP (loss) income from operations financial adjustments described above, and investors should not infer from our presentation of this non-GAAP financial measure that these costs are unusual, infrequent or non-recurring.

In managing and reviewing our business performance, we exclude a number of items required by U.S. GAAP. Management believes that excluding these items is useful in understanding the trends and managing our operations. We provide these supplemental non-GAAP measures in order to assist the investment community to see SeaChange through the “eyes of management,” and therefore enhance the understanding of SeaChange’s operating performance. Non-GAAP financial measures should be viewed in addition to, and not as an alternative to, our reported results prepared in accordance with U.S. GAAP. Our non-GAAP financial measures reflect adjustments based on the following items:

Amortization of Intangible Assets. We incur amortization expense of intangible assets related to various acquisitions that have been made in recent years. These intangible assets are valued at the time of acquisition, are then amortized over a period of several years after the acquisition and generally cannot be changed or influenced by management after the acquisition. We believe that exclusion of these expenses allows comparisons of operating results that are consistent over time for both the Company’s newly-acquired and long-held businesses.

Stock-based Compensation Expense. We incur expenses related to stock-based compensation included in our U.S. GAAP presentation of cost of revenues, selling, general and administrative expense and research and development expense. Although stock-based compensation is an expense we incur and is viewed as a form of compensation, the expense varies in amount from period to period, and is affected by market forces that are difficult to predict and are not within the control of management, such as the market price and volatility of our shares, risk-free interest rates and the expected term and forfeiture rates of the awards.

-more-

SeaChange Q2 FY15 Results/Page 9

Earn-outs and Change in Fair Value of Earn-outs. Earn-outs and the change in the fair value of the earn-outs are considered by management to be non-recurring expenses to the former shareholders of the businesses we acquire. We also incur expense due to changes in fair value related to contingent consideration that we believe would otherwise impair comparability among periods.

Professional Fees - Other. We have excluded the effect of legal and other professional fees associated with our acquisitions, divestitures, litigation and strategic alternatives because the amounts are largely considered to be significant non-operating expenses.

Severance and Other Restructuring. We incur charges due to the restructuring of our business, including severance charges and facility reductions resulting from our restructuring and streamlining efforts and any changes due to revised estimates, which we generally would not have otherwise incurred in the periods presented as part of our continuing operations.

-more-

SeaChange Q2 FY15 Results/Page 10

The following table reconciles the Company’s U.S. GAAP (loss) income from operations to the Company’s non-GAAP (loss) income from operations:

SeaChange International, Inc.

Reconciliation of GAAP to Non-GAAP

(Unaudited, amounts in thousands)

-more-

SeaChange Q2 FY15 Results/Page 11

SeaChange International, Inc.

Reconciliation of GAAP to Non-GAAP

(Unaudited, amounts in thousands)

—end press release and tables—