Michael Widenius

On 5 February 2009, he announced that he was leaving Sun in order to create his own company.

On 12 December 2009, Monty asked MySQL customers to lobby the European Commission (EC), regarding Oracle's acquisition of Sun, citing concerns about potential Oracle control of MySQL; this resulted in an online petition campaign called "Save MySQL".

The Open Database Alliance, also known as ODBA, was founded in 2009 by the Monty Program and Percona. According to its first announcement, "the Open Database Alliance will comprise a collection of companies working together to provide the software, support and services for MariaDB, an enterprise-grade, community-developed branch of MySQL".

Until MySQL AB's sale to Sun Microsystems in 2008, he was the chief technical officer of MySQL AB and still one of the primary forces behind the ongoing development of MySQL.

Widenius sold MySQL to Sun in January 2008, earning about €16.6 million in capital gains in 2008 (€16.8 million total income), making him one of the top 10 highest earners in Finland that year.

In 2008, Widenius established venture capital firm OpenOcean with MySQL co-founder Patrik Backman and early advisors Tom Henriksson and Ralf Wahlsten.

After dropping out of Helsinki University of Technology, Widenius started working for Tapio Laakso Oy in 1981. In 1985 he founded TCX DataKonsult AB (a Swedish data warehousing company) with Allan Larsson. In 1995 he began writing the first version of the MySQL database with David Axmark, released in 1996. He is the co-author of the MySQL Reference Manual, published by O'Reilly in June 2002; and in 2003 he was awarded the Finnish Software Entrepreneur of the Year prize.

Ulf Michael Widenius (often called Monty; born 3 March 1962, in Helsinki, Finland) is the main author of the original version of the open source MySQL database, a founding member of the MySQL AB company and CTO of the MariaDB Corporation AB. Additionally, he is a founder and general partner at venture capital firm OpenOcean.