UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

NOTICE OF EFFECTIVENESS

Effective Date: November 02, 2012
Accession Number: 0000891092-12-005967
Submission Type: 485APOS
CIK: 0000844779
Company Name: BLACKROCK FUNDS
File Number: 033-26305
REFERENCED SERIES/CLASSES (CONTRACTS)
Series ID Series Name
S000038550 BlackRock Short Obligations Fund
Class (Contract) ID Class (Contract) Name
C000119004 BlackRock Shares
Series ID Series Name
S000038551 BlackRock Ultra-Short Obligations Fund
Class (Contract) ID Class (Contract) Name
C000119005 BlackRock Shares