Exhibit 99.1

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Investor Relations Contact:

Brian Norris

Acme Packet

+1.781.328.4790

bnorris@acmepacket.com

Media and Analyst Contact:

Mike O’Malley

Acme Packet

+1.781.869.2975

momalley@acmepacket.com

Acme Packet Reports Results for Fourth Quarter of 2012

Bedford, Massachusetts – February 4, 2013 — Acme Packet, Inc. (NASDAQ: APKT), the leader in session delivery network solutions, today announced results for the fourth quarter of 2012.

Results for the Fourth Quarter of 2012

Total revenue for the fourth quarter of 2012 was $70.7 million, compared to $83.0 million in the fourth quarter of 2011 and $65.3 million in the third quarter of 2012. GAAP net loss for the fourth quarter of 2012 was $2.0 million, or $(0.03) per share, compared to GAAP net income of $8.7 million, or $0.12 per share, in the fourth quarter of 2011 and GAAP net loss of $5.5 million, or $(0.08) per share, in the third quarter of 2012. Net income on a non-GAAP¹basis for the fourth quarter of 2012 was $6.5 million, or $0.09 per share, compared to $18.3 million, or $0.26 per share, in the fourth quarter of 2011, and $4.7 million, or $0.07 per share, in the third quarter of 2012. All earnings per share results, referenced above, are on a fully diluted basis.

Quarterly Conference Call Cancelled

As a result of the earlier announcement, Oracle to Buy Acme Packet, Acme Packet is cancelling its financial results conference call previously scheduled for today.

¹	A reconciliation of GAAP to non-GAAP results, and a statement on the use of non-GAAP financial measures, is included at the end of this press release.

About Acme Packet

Acme Packet (NASDAQ: APKT), the leader in session delivery network solutions, enables the trusted, first-class delivery of next-generation voice, video, data and unified communications services and applications across IP networks. Our Net-Net product family fulfills demanding security, service assurance and regulatory requirements in service provider, enterprise and contact center networks. Based in Bedford, Massachusetts, Acme Packet designs and manufactures its products primarily in the USA, selling them through over 330 reseller partners worldwide. More than 1,925 customers in 109 countries have deployed over 21,000 Acme Packet systems, including 89 of the top 100 service providers and 51 of the Fortune 100. For more information visit www.acmepacket.com.

Acme Packet, Inc. Safe Harbor Statement

Statements contained herein that are not historical fact may be forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Such forward-looking statements may relate to, among other things, expected financial and operating results, expected growth rates, future stock-based compensation and amortization expenses, future business prospects and market conditions. Such forward-looking statements do not constitute guarantees of future performance and are subject to a variety of risks and uncertainties that could cause actual results to differ materially from those anticipated. These include, but are not limited to: the amount of stock-based compensation awarded; the applicable Company stock price used to determine stock-based compensation; the exercise pattern of employee stock options; difficulties expanding the Company’s customer base; difficulties leveraging market opportunities; difficulties providing solutions that meet the needs of customers; poor product sales; long sales cycles; difficulties developing new products; difficulties in relationships with vendors and partners; higher risks in international operations; difficulties managing rapid growth; difficulties managing the Company’s financial performance; the ability to hire and retain employees and appropriately staff operations; the Company’s cash needs; the impact of new accounting pronouncements and increased competition. Additional factors that could cause actual results to differ materially from those projected or suggested in any forward-looking statements are contained in the Company’s recent filings with the Securities and Exchange Commission, including those factors discussed under the caption “Risk Factors” in such filings.

Acme Packet, Inc.

Condensed Consolidated Statements of Operations

(in thousands, except share and per share data)

(unaudited)


	Three Months Ended						Twelve Months Ended
	December 31,						December 31,
	2012			2011			2012			2011
Revenue:
Product	$	51,307		$	64,276		$	201,098		$	241,783
Maintenance, support and service		19,395			18,720			73,339			65,534

Total revenue		70,702			82,996			274,437			307,317

Cost of revenue:
Product		10,145			12,155			39,492			42,245
Maintenance, support and service		3,464			3,118			15,358			11,691

Total cost of revenue		13,609			15,273			54,850			53,936

Gross profit		57,093			67,723			219,587			253,381

Operating expenses:
Sales and marketing		38,406			29,940			136,636			105,580
Research and development		16,528			14,221			64,780			51,483
General and administrative		5,211			6,073			23,652			21,844
Merger related costs		—			—			643			300

Total operating expenses		60,145			50,234			225,711			179,207

(Loss) income from operations		(3,052	)		17,489			(6,124	)		74,174

Other expense, net		(159	)		(91	)		(32	)		(238	)

(Loss) income before income taxes		(3,211	)		17,398			(6,156	)		73,936

(Benefit from) provision for income taxes		(1,182	)		8,681			(914	)		29,576

Net (loss) income	$	(2,029	)	$	8,717		$	(5,242	)	$	44,360

Net (loss) income per share:
Basic	$	(0.03	)	$	0.13		$	(0.08	)	$	0.67
Diluted	$	(0.03	)	$	0.12		$	(0.08	)	$	0.63
Weighted average number of common shares used in the calculation of net (loss) income per share:
Basic		67,627,896			67,314,606			68,084,305			66,346,008
Diluted		67,627,896			70,679,690			68,084,305			70,902,293

Acme Packet, Inc.

Condensed Consolidated Balance Sheets

(in thousands)

(unaudited)


	December 31, 2012			December 31, 2011
Assets
Current assets:
Cash and cash equivalents	$	55,381		$	160,403
Short-term investments		302,865			191,672
Accounts receivable, net		58,610			59,739
Inventory, net		10,539			10,246
Deferred product costs		1,006			1,515
Deferred tax asset, net		9,423			4,809
Income taxes receivable		—			4,341
Other current assets		7,190			4,385

Total current assets		445,014			437,110
Long-term investments		27,220			20,096
Property and equipment, net		44,264			26,252
Intangible assets, net		19,331			8,569
Goodwill		15,263			3,778
Deferred tax asset, net		27,758			18,371
Other assets		362			230

Total assets	$	579,212		$	514,406

Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	12,845		$	10,318
Accrued expenses and other current liabilities		18,964			12,715
Deferred revenue		23,482			22,261

Total current liabilities		55,291			45,294

Deferred revenue, net of current portion		3,663			2,049

Deferred rent, net of current portion		9,620			4,533

Deferred tax liability		2,914			—

Stockholders’ equity:
Common stock		76			74
Additional paid-in capital		442,990			363,769
Treasury stock, at cost		(66,311	)		(37,522	)
Accumulated other comprehensive income		3			1
Retained earnings		130,966			136,208

Total stockholders’ equity		507,724			462,530

Total liabilities and stockholders’ equity	$	579,212		$	514,406

Condensed Consolidated Statements of Cash Flow Data

(in thousands)

(unaudited)


	Three Months Ended						Twelve Months Ended
	December 31,						December 31,
	2012			2011			2012			2011
Cash provided by operating activities	$	3,856		$	18,695		$	60,876	*	$	55,341
Cash used in investing activities		(19,738	)		(34,550	)		(163,558	)*		(49,036	)
Cash provided by (used in) financing activities		15,096			19,296			(2,340	)		62,429

Please note that due to a clerical error, the press release issued on the date hereof did not reflect a reclassification in the amount of $2,481. The correct amounts are $60,876 and $(163,558) as cash provided by operating activities and cash used in investing activities, respectively, for the twelve months ended December 31, 2012.

Acme Packet, Inc.

Statement on Use of Non-GAAP Financial Measures and

Reconciliation of Non-GAAP Net (Loss) Income and Non-GAAP Net (Loss) Income Per Share

(in thousands, except share and per share data)

(unaudited)

Statement on Use of Non-GAAP Financial Measures:

To supplement its condensed consolidated statements of operations presented in accordance with accounting principles generally accepted in the United States (“GAAP”), the Company discloses certain non-GAAP financial measures, including “non-GAAP net (loss) income”, “net (loss) income on a non-GAAP basis”, “non-GAAP EPS”, and “net (loss) income per share on a non-GAAP basis”. These non-GAAP financial measures are not presented in accordance with GAAP and are not meant to be a substitute for the most directly comparable GAAP measures of “net (loss) income”, “EPS” or “net (loss) income per share”. Rather, these non-GAAP financial measures should be evaluated in conjunction with its most directly comparable GAAP financial measure and the Company’s financial statements as a whole.

Management uses these supplemental non-GAAP financial measures to evaluate performance period over period, to analyze the underlying trends in the Company’s business, to assess its performance relative to its competitors, and to establish operational goals and forecasts that are used in allocating resources. Management uses these non-GAAP financial measures because they exclude stock-based compensation expense which is a non-cash charge and related payroll taxes, amortization of acquired intangible assets, and merger and related costs associated with the Company’s acquisition activities all of which are non-operational costs and expenses. By excluding stock-based compensation expense and related payroll taxes, amortization of acquired intangible assets, and merger and related costs, management can compare the Company’s operations to prior periods and to the operations of other companies in its industry who may have materially different unusual, non-operational charges. Management does not consider any of stock-based compensation expense and related payroll taxes, amortization of acquired intangible assets, and merger and related costs to be part of the Company’s operating activities or meaningful in evaluating the Company’s past financial performance or future prospects. Management believes that excluding these items is useful to investors because it is more representative of ongoing costs and therefore more comparable to historical operations.

Because management uses them, management believes that the disclosure of these non-GAAP financial measures to investors provides greater transparency and useful information to help the investor better understand the Company’s operating performance and to evaluate the methodology used by management to evaluate and measure such performance. Notwithstanding their utility to investors in understanding operational trends, these non-GAAP measures should not be considered measures of the Company’s liquidity. In addition, the Company cautions that its definition of “non-GAAP net (loss) income”, “net (loss) income on a non-GAAP basis”, “non-GAAP EPS” and “net (loss) income per share on a non-GAAP basis” may differ from similar measures used by other companies and may differ from period to period. Also, in future periods, management may make other adjustments for expenses and gains that it does not consider reflective of core operating performance in a particular period thereby modifying its definition of “non-GAAP net (loss) income”, “non-GAAP EPS” and “non-GAAP net (loss) income per share” by excluding these other or additional expenses and gains.

Reconciliation of GAAP to Non-GAAP Financial Measures for the Three Months Ended December 31, 2012, September 30, 2012, and December 31, 2011 and for the Twelve Months Ended December 31, 2012 and December 31, 2011:

Acme Packet, Inc.

Reconciliation of GAAP to Non-GAAP Financial Measures

Three Months Ended December 31, 2012

(in thousands, except per share data)

(unaudited)


	GAAP			Stock-based compensation expense and related payroll taxes			Amortization of acquired intangible assets			Non-GAAP¹
Cost of revenue:
Product	$	10,145		$	(379	)	$	(657	)	$	9,109
Maintenance, support and service		3,464			(522	)		—			2,942

Operating expenses:
Sales and marketing		38,406			(6,991	)		(288	)		31,127
Research and development		16,528			(3,201	)		(51	)		13,276
General and administrative		5,211			(1,088	)		—			4,123

(Benefit from) provision for income taxes		(1,182	)		4,305			369			3,492

Net (loss) income		(2,029	)		7,876			627			6,474

Net (loss) income per share:
Basic	$	(0.03	)	$	0.12		$	0.01		$	0.10
Diluted	$	(0.03	)	$	0.11		$	0.01		$	0.09
Weighted average number of shares used in the calculation of net (loss) income per share:
Basic		67,627,896			67,627,896			67,627,896			67,627,896
Diluted		67,627,896			69,611,815			69,611,815			69,611,815

Acme Packet, Inc.

Reconciliation of GAAP to Non-GAAP Financial Measures

Three Months Ended September 30, 2012

(in thousands, except per share data)

(unaudited)


	GAAP			Stock-based compensation expense and related payroll taxes			Amortization of acquired intangible assets			Merger related costs			Non-GAAP¹
Cost of revenue:
Product	$	9,584		$	(438	)	$	(658	)	$	—		$	8,488
Maintenance, support and service		4,261			(702	)		—			—			3,559

Operating expenses:
Sales and marketing		35,090			(6,794	)		(261	)		—			28,035
Research and development		16,898			(4,181	)		(51	)		—			12,666
General and administrative		6,154			(1,336	)		—			—			4,818
Merger related costs		30			—			—			(30	)		—

(Benefit from) provision for income taxes		(1,129	)		3,844			359			—			3,074

Net (loss) income		(5,515	)		9,607			611			30			4,733

Net (loss) income per share:
Basic	$	(0.08	)	$	0.14		$	0.01		$	0.00		$	0.07
Diluted	$	(0.08	)	$	0.14		$	0.01		$	0.00		$	0.07

Weighted average number of shares used in the calculation of net (loss) income per share:
Basic		68,246,091			68,246,091			68,246,091			68,246,091			68,246,091
Diluted		68,246,091			70,102,125			70,102,125			70,102,125			70,102,125

Acme Packet, Inc.

Reconciliation of GAAP to Non-GAAP Financial Measures

Three Months Ended December 31, 2011

(in thousands, except per share data)

(unaudited)


	GAAP		Stock-based compensation expense and related payroll taxes			Amortization of acquired intangible assets			Non-GAAP¹
Cost of revenue:
Product	$	12,155	$	(314	)	$	(385	)	$	11,456
Maintenance, support and service		3,118		(577	)		—			2,541

Operating expenses:
Sales and marketing		29,940		(4,857	)		(100	)		24,983
Research and development		14,221		(3,063	)		(11	)		11,147
General and administrative		6,073		(1,574	)		—			4,499

Provision for income taxes		8,681		1,148			174			10,003

Net income	$	8,717	$	9,237		$	322		$	18,276

Net income per share:
Basic	$	0.13	$	0.14		$	0.00		$	0.27
Diluted	$	0.12	$	0.13		$	0.00		$	0.26

Weighted average number of shares used in the calculation of net (loss) income per share:
Basic		67,314,606		67,314,606			67,314,606			67,314,606

Diluted		70,679,690		70,679,690			70,679,690			70,679,690

Acme Packet, Inc.

Reconciliation of GAAP to Non-GAAP Financial Measures

Twelve Months Ended December 31, 2012

(in thousands, except per share data)

(unaudited)


	GAAP			Stock-based compensation expense and related payroll taxes			Amortization of acquired intangible assets			Merger related costs			Non-GAAP¹
Cost of revenue:
Product	$	39,492		$	(1,687	)	$	(2,332	)	$	—		$	35,473
Maintenance, support and service		15,358			(2,642	)		—			—			12,716

Operating expenses:
Sales and marketing		136,636			(26,769	)		(844	)		—			109,023
Research and development		64,780			(16,031	)		(136	)		—			48,613
General and administrative		23,652			(6,003	)		—			—			17,649
Merger related costs		643			—			—			(643	)		—

(Benefit from) provision for income taxes		(914	)		17,694			1,235			—			18,015

Net (loss) income		(5,242	)		35,439			2,077			643			32,917

Net (loss) income per share:
Basic	$	(0.08	)	$	0.52		$	0.03		$	0.01		$	0.48
Diluted	$	(0.08	)	$	0.50		$	0.03		$	0.01		$	0.47

Weighted average number of common shares used in the calculation of net income per share:
Basic		68,084,305			68,084,305			68,084,305			68,084,305			68,084,305
Diluted		68,084,305			70,445,310			70,445,310			70,445,310			70,445,310

Acme Packet, Inc.

Reconciliation of GAAP to Non-GAAP Financial Measures

Twelve Months Ended December 31, 2011

(in thousands, except per share data)

(unaudited)


	GAAP		Stock-based compensation expense and related payroll taxes			Amortization of acquired intangible assets			Merger related costs			Non-GAAP¹
Cost of revenue:
Product	$	42,245	($	1,230	)	($	1,677	)	$	—		$	39,338
Maintenance, support and service		11,691		(2,095	)		—			—			9,596

Operating expenses:
Sales and marketing		105,580		(17,661	)		(387	)		—			87,532
Research and development		51,483		(10,886	)		(45	)		—			40,552
General and administrative		21,844		(5,472	)		—			—			16,372
Merger related costs		300		—			—			(300	)		—

Provision for income taxes		29,576		11,022			755			43			41,396

Net income	$	44,360	$	26,322		$	1,354		$	257		$	72,293

Net income per share:
Basic	$	0.67	$	0.40		$	0.02		$	0.00		$	1.09
Diluted	$	0.63	$	0.37		$	0.02		$	0.00		$	1.02

Weighted average number of common shares used in the calculation of net income per share:
Basic		66,346,008		66,346,008			66,346,008			66,346,008			66,346,008
Diluted		70,902,293		70,902,293			70,902,293			70,902,293			70,902,293

Acme Packet, Inc.

Other Operational Data

(unaudited)


	Three Months Ended
	December 31, 2012		September 30, 2012		December 31, 2011
Other operational data:
Depreciation and amortization (in thousands)	$	4,013	$	3,991	$	2,944
Capital expenditures (in thousands)		8,902		5,151		4,186
Days sales outstanding		75		79		65
Total headcount		880		863		752
Quarterly inventory turnover – annualized		3.71		3.28		4.41

ACME PACKET INC 8-K