Apple seeded the fifth beta of OS X Yosemite 10.10.3 (build 14D113c) to developers and public beta testers on Monday. The new seed comes one week after the release of the fourth beta.
The new build is available to developers and public beta testers via the “Updates” tab in the Mac App Store, and soon via the Mac Developer Center for registered developers.
Also included in today’s seed is Yosemite Recovery Update 3.0.