List of Famous people who are 40

Michael Franklin Quitugua San Nicolas is a Guamanian Democratic Party politician, currently serving as the Delegate to the U.S. House of Representatives for Guam's at-large congressional district. San Nicolas was elected by his colleagues in the 116th United States Congress to serve as Vice Chair of the United States House Committee on Financial Services. From 2013 to 2019, San Nicolas served as senator in the 32nd, 33rd, and 34th Guam Legislatures.

Jeremy Hitchcock is co-founder and CEO of wifi management and IoT security startup, Minim, based in Manchester, NH. He was also a co-founder and former CEO of Dyn. Hitchcock resigned from the business in May 2016 prior to the Oracle acquisition, which officially closed on January 31, 2017.

Hampton Lintorn-Catlin is an American computer programmer, programming language inventor, gay rights advocate, and author, best known as the creator of the Sass and Haml markup languages. Hampton was a Vice President of Engineering at Rent the Runway, and has previously held similar roles at Moovweb, Wordset, and at the Wikimedia Foundation.

Hans Dekkers is a Dutch racing cyclist.