[O2Micro Reports Second Quarter Results 2 GEORGE TOWN, Grandyman, Aug. 1, 2012 (GLOBE NEWSWIRE) -- O Financial Highlights for the Second Quarter ending June 30, 2012 2 O GAAP net loss was $10.9 million in Q2 2012. Thismpares to GAAP netome of $44,000 in the first quarter of 2012 and GAAP netome of $3.0 million]

[CONTENTS CORPORATE INFORMATION 1 CHAIRMAN’S STATEMENT 2 4 FINANCIAL HIGHLIGHTS 8 -i- THIS PAGE INTENTIONALLY LEFT BLANK CORPORATE INFORMATION Independent Auditor Deloitte & Touche Legal counsel Morrison & Foerster LLP Palo Alto office 755 Page Mill Road Palo Alto, California 94304 USA Maples and Calder PO Box 309 Ugland House Grand Cayman KY1-1104 Cayman Islands Board of Directors Executive Directors] [2 http://www.o2micro.com O Proxy Services Corporation 200 A Executive Drive Edgewood, NY 11717 Attention: Greg Penn (Annual Report) You may also request for a hardcopy of the annual report by calling the toll free number 1-800-555-2470. 2 http://www.o2micro.com O Proxy Services Corporation 200 A Executive Drive Edgewood, NY 11717 Attention: Greg Penn (Annual Report) You may also request for a] [O 2 MICRO INTERNATIONAL LIMITED (Incorporated in the Cayman Islands with limited liability) NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON FRIDAY, JUNE 22, 2012 2 O Grand Pavilion Commercial Centre, West Bay Road P.O. Box 32331 SMB, George Town Grand Cayman, Cayman Islands Executive Directors Sterling Du Chuan Chiung “Perry” Kuo James Elvin Keim Independent Non-Executive]

[CONTENTSRPORATE INFORMATION 1 CHAIRMANS STATEMENT 2 4 FINANCIAL HIGHLIGHTS 8 -i- THIS PAGE INTENTIONALLY LEFT BLANKRPORATE INFORMATION Independent Auditor Deloitte & Touche Legalunsel Morrison & Foerster Paloto office 755 Page Mill Road Paloto,lifornia 94304 USA Maples andlder PO Box 309 Ugland House Grandyman1-1104] [2 http://www.o2micro.com O Proxy Servicesrporation 200 A Executive Drive Edgewood, NY 11717 Attention:Greg Penn (Annual Report) You mayso request for a hardcopy of the annual report bylling the toll free number 1-800-555-2470. 2 http://www.o2micro.com O Proxy Servicesrporation 200 A Executive Drive Edgewood, NY 11717 Attention:Greg Penn (Annual Report)] [O 2 MICRO INTERNATIONAL LIMITED (Incorporated in theyman Islands with limited liability) NOTICE OF ANNUAL GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON FRIDAY, JUNE 22, 2012 2 O Grand Pavilionmmercial Centre, West Bay Road P.O. Box 32331 SMB, George Town Grandyman,yman Islands Executive Directors Sterling Du]

[2 Monolithic Power Systems, Inc. v. O 2 ® OIIM Monolithic Power Systems, Inc. v. O 2 Micro International Limited GEORGE TOWN, Grand Cayman, May 9, 2012. O 2 2 2 2 2 . This order is in response to MPS’ motion for attorneys’ fees and costs filed in June 2010 after O History of the case 2 2 2]

[2 Monolithic Power Systems, v. O History of theseout O 2 Micro 2 Founded in April 1995, O 2 www.o2micro.com . O 2 2 2 Ontact Information: Gary E.bott 2 Director of Investor Relations, O Phone: 408.987.5920, x8888 gary.abbott@o2micro.com Email: exh_991.htm 2 EX-99.1]

[O2Micro Reports First Quarter Results 2 ® GEORGE TOWN, Grand Cayman, May 2, 2012 (GLOBE NEWSWIRE) -- O Financial Highlights for the First Quarter of 2012 2 O GAAP net income was $44,000 in Q1 2012. This compares to GAAP net income of $1.9 million in the fourth quarter of 2011 and GAAP net income of $3.1 million in Q1]