Fortune released its 2010 40 Under 40 rankings Thursday, and technology and media are well-represented, with Andreessen Horowitz co-founder and Netscape Communications founder Marc Andreessen occupying the top spot, followed by Facebook co-founder and CEO Mark Zuckerberg, and a third-place tie between Twitter co-founders Evan Williams and Biz Stone.

Google co-founders Sergey Brin and Larry Page tied for fifth; News Corp. chairman and CEO, Europe and Asia James Murdoch was No. 8; Univision Networks president César Conde No. 12; Aol chairman and CEO Tim Armstrong No. 18; there was a three-way tie at No. 27 between Facebook vice president of product Chris Cox, VP of engineering Mike Schroepfer, and chief technology officer Bret Taylor; foursquare co-founder and CEO Dennis Crowley was at No. 29; Slide founder Max Levchin and Vevo president and CEO Rio Caraeff tied at No. 31; Google head of location and mobile services Marissa Mayer at No. 34; Hulu CEO Jason Kilar at No. 37; and Microsoft global head of advertising Carolyn Everson at No. 39.

The 2010 40 Under 40 rankings will appear in the Nov. 1 issue of Fortune, which will be on newsstands Monday. The full list appears after the jump:

1 Marc Andreessen, age 39, Netscape, Opsware, Ning, Andreessen Horowitz

2 Mark Zuckerberg, age 26, Facebook

3 Evan Williams, age 38, Twitter

3 Biz Stone, age 36, Twitter

4 Raul Vazquez, age 39, Wal-Mart

5 Sergey Brin, age 37, Google

5 Larry Page, age 37, Google

6 Aditya Mittal, age 34, ArcelorMittal

7 Pony Ma Huateng, age 39, Tencent

8 James Murdoch, age 37, News Corp.

9 John Arnold, age 36, Centaurus Advisors

10 Marcos Galperin, age 39, MercadoLibre

11 Greg Jensen, age 36, Bridgewater Associates

12 César Conde, age 36, Univision Networks

13 G. Mike Mikan, age 39, UnitedHealth Group

14 Kevin Plank, age 38, Under Armour

15 Wendy Clark, age 39, Coca-Cola

16 Elon Musk, age 39, Tesla, SpaceX, SolarCity

17 Boaz Weinstein, age 37, Saba Capital Management

18 Tim Armstrong, age 39, AOL

19 Esther Duflo, age 38, MIT, Jameel Poverty Action Lab

20 LeBron James, age 25, Miami Heat

21 Ryan Kavanaugh, age 35, Relativity Media

22 Stephen Gillett, age 34, Starbucks

23 Christa Davies, age 39, Aon

24 Lorenzo Simonelli, age 37, GE Transportation

25 Andrew Mason, age 30, Groupon

26 Charles Best, age 35, Donorschoose.org

27 Chris Cox, age 28, Facebook

27 Mike Schroepfer, age 35, Facebook

27 Bret Taylor, age 30, Facebook

28 Seth MacFarlane, age 37, Family Guy

29 Dennis Crowley, age 34, foursquare

30 Karl-Johan Persson, age 35, H&M

31 Max Levchin, age 35, PayPal, Slide, Google

31 Rio Caraeff, age 35, Vevo

32 Eric Braverman, age 35, McKinsey & Co.

33 Ed Rosenfeld, age 35, Steven Madden Ltd.

34 Marissa Mayer, age 35, Google

34 Salman Khan, age 34, Khan Academy

35 Adam Palmer, age 37, Carlyle Group

36 Phillip Lim, age 37, 3.1 Phillip Lim

36 Wen Zhou, age 37, 3.1 Phillip Lim

37 Jason Kilar, age 39, Hulu

37 Amit Chatterjee, age 38, Hara

38 Roland Fryer, age 33, Harvard University

39 Carolyn Everson, age 38 Microsoft

40 Aryeh Bourkoff, age 37, UBS

40 Iain Tait, age 38, Wieden & Kennedy