Exhibit 99.1

Marvell Technology Group Ltd. Reports Fourth Fiscal Quarter and Fiscal Year 2014 Financial Results

Santa Clara, Calif. (February 20, 2014) — Marvell Technology Group Ltd. (NASDAQ: MRVL), a global leader in integrated silicon solutions, today reported financial results for the fourth fiscal quarter and fiscal year 2014, ended February 1, 2014.

Key Fourth Quarter of Fiscal 2014 and Fiscal Year 2014 Financial Highlights

First Quarter of Fiscal 2015 Financial Outlook

Marvell’s financial outlook does not include the potential impact of future share repurchases, pending litigation matters, business combinations, asset acquisitions or other investments that may be completed after February 1, 2014.

Fourth Quarter of Fiscal 2014 and Fiscal Year 2014 Summary

Revenue for the fourth quarter of fiscal 2014 was $932 million, essentially flat from $931 million in the third quarter of fiscal 2014, ended November 2, 2013, and a 20 percent increase from revenue of $775 million in the fourth quarter of fiscal 2013, ended February 2, 2013.

For the fiscal year ended February 1, 2014, revenue was $3.4 billion, an increase of 7 percent from revenue of $3.17 billion for the fiscal year ended February 2, 2013.

GAAP net income for the fourth quarter of fiscal 2014 was $107 million, or $0.21 per share (diluted), compared with GAAP net income of $103 million, or $0.21 per share (diluted), for the third quarter of fiscal 2014, and $50 million, or $0.09 per share (diluted), for the fourth quarter of fiscal 2013.

For the year ended February 1, 2014, GAAP net income was $325 million, or $0.64 per share (diluted), compared with GAAP net income of $307 million, or $0.54 per share (diluted), for the year ended February 2, 2013.

Non-GAAP net income was $151 million, or $0.29 per share (diluted), for the fourth quarter of fiscal 2014, compared with non-GAAP net income of $163 million, or $0.32 per share (diluted), for the third quarter of fiscal 2014 and $104 million, or $0.19 per share (diluted), for the fourth quarter of fiscal 2013.

For the fiscal year ended February 1, 2014, non-GAAP net income was $530 million, or $1.02 per share (diluted), compared with non-GAAP net income of $498 million, or $0.86 per share (diluted) for the fiscal year ended February 2, 2013.

“Fiscal year 2014 was the start of a turnaround for Marvell as we delivered year over year growth in revenue and profits. We made good progress in a number of critical areas during the year,” said Dr. Sehat Sutardja, Marvell’s Chairman and Chief Executive Officer. “We are investing in advanced technologies that will help drive increased business opportunities and continued revenue and profit growth in all of our target end markets.”

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Marvell reports net income, basic and diluted net income per share, in accordance with U.S. generally accepted accounting principles (GAAP) and on a non-GAAP basis as outlined below. Reconciliations of GAAP net income to non-GAAP net income for all periods presented appear in the financial statements below. Non-GAAP net income, where applicable, excludes the effect of share-based compensation, amortization and write-off of acquired intangible assets, acquisition-related costs, restructuring and other exit related costs, and certain one-time expenses and benefits.

GAAP gross margin for the fourth quarter of fiscal 2014 was 49.8 percent, compared to 50.1 percent for the third quarter of fiscal 2014 and 52.2 percent for the fourth quarter of fiscal 2013. GAAP gross margin for fiscal year 2014 was 51.4 percent compared to 52.9 percent for fiscal year 2013.

Non-GAAP gross margin for the fourth quarter of fiscal 2014 was 50.1 percent, compared to 50.3 percent for the third quarter of fiscal 2014 and 53.2 percent for the fourth quarter of fiscal 2013. Non-GAAP gross margin for fiscal year 2014 was 51.8 percent compared to 53.4 percent for fiscal year 2013.

Shares used to compute GAAP net income per diluted share for the fourth quarter of fiscal 2014 were 510 million shares, compared with 501 million shares in the third quarter of fiscal 2014 and 528 million shares in the fourth quarter of fiscal 2013. Shares used to compute GAAP net income per diluted share for fiscal year 2014 were 504 million shares as compared with 563 million shares for fiscal year 2013.

Shares used to compute non-GAAP net income per diluted share for the fourth quarter of fiscal 2014 were 523 million shares, compared with 514 million shares for the third quarter of fiscal 2014 and 544 million shares for the fourth quarter of fiscal 2013. Shares used to compute non-GAAP net income per diluted share for fiscal year 2014 were 519 million shares as compared with 579 million shares for fiscal year 2013.

Cash flow from operations for the fourth quarter of fiscal 2014 was $100 million, compared to the $177 million reported in the third quarter of fiscal 2014 and the $205 million reported in the fourth quarter of fiscal 2013. Free cash flow for the fourth quarter of fiscal 2014 was $82 million, compared to the $157 million reported in the third quarter of fiscal 2014 and the $161 million reported in the fourth quarter of fiscal 2013. Free cash flow as presented above is defined as cash flow from operations, less capital expenditures and purchases of technology licenses reported under investing and financing activities in the consolidated statement of cash flows.

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Marvell paid a quarterly dividend of $0.06 per share on December 23, 2013 to all shareholders of record as of December 12, 2013. Marvell intends to pay its next quarterly dividend of $0.06 per share on March 27, 2014 to all shareholders of record as of March 13, 2014. Developments in on-going litigation could affect Marvell’s ability to pay the dividend on March 27, 2014 under Bermuda law, where Marvell is incorporated. In such an event, the dividend payment could be delayed until such time as Marvell can meet statutory requirements under Bermuda law.

The payment of future quarterly cash dividends on Marvell’s common shares is subject to, among other things, the best interests of its shareholders, its results of operations, cash balances and future cash requirements, financial condition, statutory requirements of Bermuda law, and other factors that the board of directors may deem relevant.

Conference Call

Marvell will be conducting a conference call on Thursday, February 20, 2014 at 1:45 p.m. Pacific Time to discuss results for the fourth fiscal quarter and fiscal year 2014. Interested parties may join the conference call by dialing 1- 866-318-8620 or 1- 617-399-5139, pass-code 20681461. The call will be webcast by Thomson Reuters and can be accessed at the Marvell Investor Relations website at http://investor.marvell.com/ with a replay available following the call until March 19, 2014.

Discussion of Non-GAAP Financial Measures

Non-GAAP financial measures exclude the effect of share-based compensation expense, amortization and write-off of acquired intangible assets, acquisition-related costs, restructuring and other exit-related costs, and certain one-time expenses and benefits that are driven primarily by discrete events that management does not consider to be directly related to Marvell’s core operating performance. Non-GAAP net income per share is calculated by dividing non-GAAP net income by non-GAAP weighted average shares outstanding (diluted). For purposes of calculating non-GAAP net income per share, the GAAP weighted average shares outstanding (diluted) is adjusted to exclude the potential benefits of share-based compensation expected to be incurred in future periods but not yet recognized in the financial statements. The expected compensation costs are treated as proceeds assumed to be used to repurchase shares under the GAAP treasury stock method and also include the dilutive/anti-dilutive effects of common stock options and restricted stock units.

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Marvell believes that the presentation of non-GAAP financial measures provide important supplemental information to management and investors regarding financial and business trends relating to Marvell’s financial condition and results of operations. While Marvell uses non-GAAP financial measures as a tool to enhance its understanding of certain aspects of its financial performance, Marvell does not consider these measures to be a substitute for, or superior to, the information provided by GAAP financial measures. Consistent with this approach, Marvell believes that disclosing non-GAAP financial measures to the readers of its financial statements provides such readers with useful supplemental data that, while not a substitute for GAAP financial measures, allows for greater transparency in the review of its financial and operational performance. For further information regarding why Marvell believes that these non-GAAP measures provide useful information to investors, the specific manner in which management uses these measures, and some of the limitations associated with the use of these measures, please refer to Marvell’s Current Report on Form 8-K filed today with the SEC. The Form 8-K is available on the SEC’s website at www.sec.gov as well as on the Marvell website in the Investor Relations section at www.marvell.com.

Forward-Looking Statements under the Private Securities Litigation Reform Act of 1995

This press release contains forward-looking statements that involve risks and uncertainties, including Marvell’s expectations and statements regarding: its financial outlook for the first quarter of fiscal 2015; its continued investment in advanced technologies that should help drive increased business opportunities and result in continued revenue and profit growth in all of Marvell’s target end markets; its dividend program including the declaration of, timing of, funding of, payment of and quarterly amount of dividends; and its use of non-GAAP financial measures as important supplemental information. These statements are not guarantees of results and should not be considered as an indication of future activity or future performance. Actual events or results may differ materially from those described in this press release due to a number of risks and uncertainties, including, among others, Marvell’s reliance on a few customers for a significant portion of its revenue; costs and liabilities relating to current and future litigation; Marvell’s ability to develop and introduce new and enhanced products in a timely and cost effective manner and the adoption of those products in the market; seasonality in sales of consumer devices in which our products are incorporated; Marvell’s ability to compete in products and prices in an intensely competitive industry; uncertainty in the worldwide economic conditions; Marvell’s ability to

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recruit and retain skilled personnel; Marvell’s ability to generate cash flows; and other risks detailed in Marvell’s SEC filings from time to time. When Marvell files its Annual Report on Form 10-K for the year ended February 1, 2014, the financial statements may differ from the results disclosed in this press release because judgments and estimates that management used in preparing the financial results reported in this press release may need to be updated to the date of the filing. For other factors that could cause Marvell’s results to vary from expectations, please see the risk factors identified in the Marvell’s latest Quarterly Report on Form 10-Q for the quarter ended November 2, 2013 as filed with the SEC, and other factors detailed from time to time in Marvell’s filings with the SEC. Marvell undertakes no obligation to revise or update publicly any forward-looking statements.

About Marvell

Marvell is a global leader in providing complete silicon solutions enabling the Smart lifestyle. From mobile communications to storage, cloud infrastructure, digital entertainment and in-home content delivery, Marvell’s diverse product portfolio aligns complete platform designs with industry-leading performance, security, reliability and efficiency. At the core of the world’s most powerful consumer, network and enterprise systems, Marvell empowers partners and their customers to always stand at the forefront of innovation, performance and mass appeal. By providing people around the world with mobility and ease of access to services adding value to their social, private and work lives, Marvell is committed to enhancing the human experience.

As used in this release, the term “Marvell” refers to Marvell Technology Group Ltd. and its subsidiaries. For more information please visit www.marvell.com.

Marvell® and the Marvell logo are registered trademarks of Marvell and/or its affiliates.

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Marvell Technology Group Ltd.

Condensed Consolidated Statements of Operations

(Unaudited)

(In thousands, except per share amounts)

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Marvell Technology Group Ltd.

Condensed Consolidated Balance Sheets

(Unaudited)

(In thousands)

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Marvell Technology Group Ltd.

Condensed Consolidated Statements of Cash Flows

(Unaudited)

(in thousands)

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Marvell Technology Group Ltd.

Reconciliations from GAAP to Non-GAAP

(Unaudited)

(In thousands, except per share amounts)

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Marvell Technology Group Ltd.

Reconciliations from GAAP to Non-GAAP Outlook

(Unaudited)

(In millions, except per share amounts)

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