Exhibit 99

PRESS RELEASE

FOR IMMEDIATE RELEASE

Contact: Marty Jimmerson

RigNet, Inc.

+1 (281) 674-0699

investor.relations@rig.net

RigNet Announces Fourth Quarter and Full Year 2012 Earnings Results

HOUSTON, TX – March 7, 2013 – RigNet, Inc. (NASDAQ: RNET), a leading global provider of remote communication services to the oil and gas industry, today reported results for the quarterly and full year periods ended December 31, 2012.

Revenue was a record $49.3 million for the fourth quarter, including $13.1 million from our Nessco operations, a recently acquired subsidiary. Organic revenue increased by $6.4 million, or 21.5%, for the three months ended December 31, 2012 as compared to the same period of 2011 primarily due to increases in sites served and increasing demand for our services. Organic revenue decreased by $1.4 million, or 3.7%, for the three months ended December 31, 2012 as compared to the previous quarter primarily due to lower revenue per site and lower U.S. onshore drilling rigs served.

Adjusted EBITDA was $11.8 million for the fourth quarter, which included expenses of $1.0 million relating to a legal entity restructuring project that was completed in December 2012. We expect that this legal restructuring will result in more efficient and better optimization of our global cash. Adjusted EBITDA of $11.8 million in the fourth quarter, or 24.0% of revenue, represents an increase of 28.3% over the same quarter last year, but a decrease of 4.6% over the previous quarter. Adjusted EBITDA increased by $2.6 million over the prior year period primarily due to the increased revenue described above partially offset by increased operating costs to support the increase in revenue. The increase in Adjusted EBITDA was also partially offset by costs associated with head count additions and professional fees associated with the legal entity restructuring project and continued efforts to strengthen our internal controls over financial reporting. Adjusted EBITDA decreased $0.6 million over the previous quarter, primarily due to the decreased revenue described above.

Net income attributable to common stockholders was $3.4 million, or $0.20 per diluted share, for the fourth quarter compared to net income attributable to common stockholders of $2.0 million, or $0.12 per diluted share, in the same quarter last year and net income attributable to common stockholders of $3.2 million, or $0.19 per diluted share, in the previous quarter.

Capital expenditures were $5.3 million in the fourth quarter compared to $5.1 million in the same quarter last year and $5.2 million in the previous quarter.

1880 SOUTH DAIRY ASHFORD, SUITE 300 HOUSTON, TEXAS 77077 PHONE 281.674.0100  FAX 281.674.0101 http://www.rig.net

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For the full year 2012, RigNet reported record revenue of $161.7 million, including $23.4 million from our Nessco operations, a 26.4% organic increase over 2011 revenue of $109.4 million. RigNet reported record Adjusted EBITDA of $43.6 million for the full year 2012, a 30.3% increase over 2011 Adjusted EBITDA of $33.5 million. RigNet reported record net income attributable to common stockholders of $11.9 million, or $0.70 per diluted share, an increase of 25.2% over 2011 net income attributable to common stockholders of $9.5 million, or $0.57 per diluted share. RigNet reported record capital expenditures of $21.2 million, an increase of 8.7% over 2011 capital expenditures of $19.5 million.

Mark B. Slaughter, chief executive officer and president, commented, “I am extremely proud of the outstanding performance by the management team and our dedicated employees around the globe in 2012 as we delivered record financial results and completed the acquisition of Nessco and its telecommunications systems integration business, which positions RigNet to serve the oil and gas industry with remote communications solutions across the life of the field. Our strong fourth quarter performance also provides us with positive momentum as we enter 2013, focused on meeting the mission critical requirements of our customers.”

A conference call for investors will be held at 11:00 a.m. Eastern Time (10:00 a.m. Central Time) on Tuesday, March 12, 2013 to discuss RigNet’s 2012 fourth quarter and full year results. The call may be accessed live over the telephone by dialing (877) 845-0777, or, for international callers, +1 (760) 298-5090. Interested parties may also listen to a simultaneous webcast of the conference call by logging onto RigNet’s website at www.rig.net in the Investors – Webcasts and Presentations section. A replay of the conference call webcast will also be available on our website for approximately thirty days following the call.

Non-GAAP Financial Measures

This press release contains the following non-GAAP measures: Gross Profit (excluding depreciation and amortization) and Adjusted EBITDA. Gross Profit (excluding depreciation and amortization) and Adjusted EBITDA are financial measures that are not calculated in accordance with generally accepted accounting principles, or GAAP. We refer you to the Company’s most recent 10-K filing for the year ended December 31, 2012 for a more detailed discussion of the uses and limitations of our non-GAAP financial measures.

GAAP defines gross profit as revenue less cost of revenue, and includes in costs of revenue depreciation and amortization expenses related to revenue-generating long-lived and intangible assets. We define Gross Profit (excluding depreciation and amortization) as revenue less cost of revenue (excluding depreciation and amortization). This measure differs from the GAAP definition of gross profit as we do not include the impact of depreciation and amortization expenses related to revenue-generating long-lived and intangible assets which represent non-cash expenses. We use this measure to evaluate operating margins and the effectiveness of cost management.

We define Adjusted EBITDA as net income (loss) plus interest expense, income tax expense (benefit), depreciation and amortization, impairment of goodwill, (gain) loss on retirement of property and equipment, change in fair value of derivatives, stock-based compensation and IPO or merger/acquisition costs and related bonuses. Adjusted EBITDA should not be considered as an alternative to net income (loss), operating income (loss) or any other measure of financial performance calculated and presented in accordance with GAAP.

About RigNet

RigNet (NASDAQ: RNET) is a leading global provider of managed remote communications, systems integration and collaborative applications dedicated to the oil and gas industry, focusing on offshore and onshore drilling rigs, energy production facilities and energy maritime. RigNet provides solutions ranging from fully-managed voice and data networks to more advanced applications that include video conferencing and real-time data services to remote sites in over thirty countries on six continents, effectively spanning the drilling and production industry. RigNet is based in Houston, Texas. For more information, please visit www.rig.net. RigNet is a registered trademark of RigNet, Inc.

1880 SOUTH DAIRY ASHFORD, SUITE 300 HOUSTON, TEXAS 77077 PHONE 281.674.0100 FAX 281.674.0101 http://www.rig.net

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Forward Looking Statements

This press release includes “forward-looking statements” within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995 – that is, statements related to the future, not past, events. Forward-looking statements are based on the current expectations and include any statement that does not directly relate to a current or historical fact. In this context, forward-looking statements often address our expected future business and financial performance, and often contain words such as “anticipate,” “believe,” “intend,” “expect,” “plan” or other similar words. These forward-looking statements involve certain risks and uncertainties that ultimately may not prove to be accurate. Actual results and future events could differ materially from those anticipated in such statements. For further discussion of risks and uncertainties, individuals should refer to RigNet’s SEC filings. RigNet undertakes no obligation and does not intend to update these forward-looking statements to reflect events or circumstances occurring after this press release. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release. All forward-looking statements are qualified in their entirety by this cautionary statement.

1880 SOUTH DAIRY ASHFORD, SUITE 300 HOUSTON, TEXAS 77077 PHONE 281.674.0100 FAX 281.674.0101 http://www.rig.net

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1880 SOUTH DAIRY ASHFORD, SUITE 300 HOUSTON, TEXAS 77077 PHONE 281.674.0100 FAX 281.674.0101 http://www.rig.net

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1880 SOUTH DAIRY ASHFORD, SUITE 300 HOUSTON, TEXAS 77077 PHONE 281.674.0100 FAX 281.674.0101 http://www.rig.net

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NOTE: Consolidated balances include the three segments above along with corporate activities and intercompany eliminations.

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1880 SOUTH DAIRY ASHFORD, SUITE 300 HOUSTON, TEXAS 77077 PHONE 281.674.0100 FAX 281.674.0101 http://www.rig.net