• Net sales of $640 million to $690 million, down 5% to 11% from the prior quarter
• Gross margin of 14% to 17%
• Net loss of $5 million to net income of $16 million, or ($0.03) to $0.09 per diluted share
• Capital additions of around $125 million

Conference Call Information

Amkor will conduct a conference call on Wednesday, February 13, 2013, at 5:00 p.m. Eastern Time. This call may include material information not included in this press release. This call is being webcast and can be accessed at Amkor's website: www.amkor.com. You may also access the call by dialing 1-877-941-8609 or 1-480-629-9692. A replay of the call will be made available at Amkor's website or by dialing 1-800-406-7325 or 1-303-590-3030 (conference reservation number 4584487). The webcast is also being distributed over Thomson Reuters' Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through Thomson Reuters' individual investor center at www.companyboardroom.com or by visiting any of the investor sites in Thomson Reuters' Individual Investor Network. Institutional investors can access the call via Thomson Reuters' password-protected event management site, Street Events ( www.streetevents.com).

About Amkor

Amkor is a leading provider of semiconductor packaging and test services to semiconductor companies and electronics OEMs. More information about Amkor is available from the company's filings with the Securities and Exchange Commission and on Amkor's website: www.amkor.com.

Forward-Looking Statement Disclaimer

This press release contains forward-looking statements within the meaning of federal securities laws. All statements other than statements of historical fact are considered forward-looking statements including, without limitation, statements regarding our investments in support of the communications end market, and all of the statements made under "Business Outlook" above. These forward-looking statements involve a number of risks, uncertainties, assumptions and other factors that could affect future results and cause actual results and events to differ materially from historical and expected results and those expressed or implied in the forward-looking statements, including, but not limited to, the following:

• the highly unpredictable nature and costs of litigation and other legal activities and the risk of adverse results of such matters, including the final ruling in the Tessera arbitration and the impact of other proceedings involving Tessera, Inc.;
• the highly unpredictable nature of the semiconductor industry;
• the effect of the global economy on credit markets, financial institutions, customers, suppliers and consumers, including the increasingly uncertain macroeconomic environment;
• timing and volume of orders relative to production capacity and inability to achieve high capacity utilization rates;
• volatility of consumer demand and weakness in forecasts from our customers for products incorporating our semiconductor packages;
• dependence on key customers;
• the impact of the expected increase in our ownership in J-Devices;
• the performance of our business, economic and market conditions, the cash needs and investment opportunities for the business, the need for additional capacity and facilities to service customer demand and the availability of cash flow from operations or financing;
• customer modification of and follow through with respect to forecasts provided to us, including delays in forecasts with respect to smartphones and tablets;
• changes in tax rates and taxes as a result of changes in tax law, the jurisdictions in which our income is determined to be earned and taxed, the outcome of tax audits and tax ruling requests, our ability to realize deferred tax assets and the expiration of tax holidays;
• curtailment of outsourcing by our customers;
• our substantial indebtedness and restrictive covenants;
• failure to realize sufficient cash flow or access to other sources of liquidity to fund capital additions;
• the effects of a recession or other downturn in the U.S. and other economies worldwide;
• disruptions or deficiencies in our controls resulting from the implementation of our new enterprise resource planning system and other information technology projects;
• worldwide economic effects of terrorist attacks, natural disasters and military conflict;
• our ability to control costs and improve profitability;
• competition, competitive pricing and declines in average selling prices;
• fluctuations in manufacturing yields;
• dependence on international operations and sales;
• dependence on raw material and equipment suppliers and changes in raw material and precious metal costs;
• exchange rate fluctuations;
• dependence on key personnel;
• difficulties in managing growth;
• enforcement of and compliance with intellectual property rights;
• environmental and other governmental regulations; and
• technological challenges.