Exhibit 99.1

Applied Optoelectronics Reports First Quarter 2015 Results

Sugar Land, TX, May 7, 2015 – Applied Optoelectronics, Inc. (NASDAQ: AAOI), a leading provider of fiber-optic access network products for the internet datacenter, cable broadband and fiber-to-the-home markets, today announced financial results for its first quarter ended March 31, 2015.

“Although first quarter revenue was below our initial expectations as a result of the previously announced 40G supply shortages, we delivered 22 percent year over year growth and maintained gross margin above 33 percent,” said Dr. Thompson Lin, Applied Optoelectronics Inc. (AOI) founder and CEO. “With steady shipments of 40G components from our external supplier and with internal production of 40G light engines ramping according to plan, we are working through our backlog and increasing our 40G transceiver shipments to our customers.”

First Quarter 2015 Financial Summary

A reconciliation between all GAAP and non-GAAP information referenced above is contained in the tables below. Please also refer to “Non-GAAP Financial Measures” below for a description of these non-GAAP financial measures.

Second Quarter 2015 Business Outlook ⁽⁺⁾

For the second quarter of 2015, the company currently expects:

⁽⁺⁾ Please refer to the note below on forward-looking statements and the risks involved with such statements as well as the note on non-GAAP financial measures.

Conference Call Information

Applied Optoelectronics will host a conference call today, May 7, 2015 at 4:30 p.m. Eastern time / 3:30 p.m. Central time for analysts and investors to discuss its first quarter results and outlook for its second quarter of 2015. Open to the public, investors may access the call by dialing (719) 325-2448. A live audio webcast of the conference call along with supplemental financial information will also be accessible on the company's website at investors.ao-inc.com. Following the webcast, an archived version will be available on the website for one year. A telephonic replay of the call will be available two hours after the call and will run for five business days and may be accessed by dialing (719) 457-0820 and entering passcode 5566868.

Forward-Looking Information

This press release contains forward-looking statements. These forward-looking statements involve risks and uncertainties, as well as assumptions and current expectations, which could cause the company’s actual results to differ materially from those anticipated in such forward-looking statements. These risks and uncertainties include but are not limited to: reduction in the size or quantity of customer orders; change in demand for the company’s products due to industry conditions; changes in manufacturing operations; volatility in manufacturing costs; delays in shipments of products; disruptions in the supply chain; change in the rate of design wins or the rate of customer acceptance of new products; the company’s reliance on a small number of customers for a substantial portion of its revenues; potential pricing pressure; a decline in demand for our customers products or their rate of deployment of their products; general conditions in the internet datacenter, CATV or FTTH markets; changes in the world economy (particularly in the United States and China); the negative effects of seasonality; and other risks and uncertainties described more fully in the company’s documents filed with or furnished to the Securities and Exchange Commission. More information about these and other risks that may impact the company’s business are set forth in the “Risk Factors” section of the company’s quarterly and annual reports on file with the Securities and Exchange Commission. In some cases, you can identify forward-looking statements by terminology such as ‘‘may,’’ ‘‘will,’’ ‘‘should,’’ ‘‘expects,’’ ‘‘plans,’’ ‘‘anticipates,’’ ‘‘believes,’’ or ‘‘estimates” or by other similar expressions that convey uncertainty of future events or outcomes. You should not rely on forward-looking statements as predictions of future events. All forward-looking statements in this press release are based upon information available to us as of the date hereof, and qualified in their entirety by this cautionary statement. Except as required by law, we assume no obligation to update forward-looking statements for any reason after the date of this press release to conform these statements to actual results or to changes in the company’s expectations.

Non-GAAP Financial Measures

We provide non-GAAP gross margin, non-GAAP operating income (loss), non-GAAP net income (loss), non-GAAP earnings per share, and other non-GAAP measures like Adjusted EBITDA to eliminate the impact of items that we do not consider indicative of our overall operating performance. To arrive at our non-GAAP gross profit, we exclude stock-based compensation expense and non-recurring expenses, if any, from our GAAP gross profit. To arrive at our non-GAAP income (loss) from operations, we exclude all amortization of intangible assets, stock-based compensation expense and non-recurring expenses, if any, from our GAAP net income (loss) from operations. Included in our Q4 non-recurring expenses are items related to the relocation of our Taiwan plant and certain non-recurring expenses related to our fiber-to-the-home business. To arrive at Adjusted EBITDA, we exclude these same items and, additionally, exclude asset impairment charges, loss (gain) from disposal of idle assets, unrealized exchange loss (gain), interest (income) expense, on a net basis, provision for (benefit from) income taxes and depreciation expense, from our GAAP net income (loss). We believe that our non-GAAP measures are useful to investors in evaluating our operating performance for the following reasons:

Adjusted EBITDA and other non-GAAP measures should not be considered as an alternative to gross profit, income (loss) from operations, net income (loss) or any other measure of financial performance calculated and presented in accordance with GAAP. Our Adjusted EBITDA and other non-GAAP measures may not be comparable to similarly titled measures of other organizations because other organizations may not calculate Adjusted EBITDA or such other non-GAAP measures in the same manner.

About Applied Optoelectronics

Applied Optoelectronics, Inc. (AOI) is a leading developer and manufacturer of advanced optical products, including components, modules and equipment. AOI's products are the building blocks for broadband fiber access networks around the world, where they are used in the internet datacenter, CATV broadband and fiber-to-the-home markets. AOI supplies optical networking lasers, components and equipment to tier-1 customers in all three of these markets. In addition to its corporate headquarters, wafer fab and advanced engineering and production facilities in Sugar Land, TX, AOI has engineering and manufacturing facilities in Taipei, Taiwan and Ningbo, China. For additional information, visit www.ao-inc.com.

Investor Relations Contacts:

The Blueshirt Group, Investor Relations

Maria Riley

+1-415-217-7722

ir@ao-inc.com