The published values for mutual fund sectors' holdings of Treasury bills and other Treasury securities, shown on table L.210 lines 45 and 46 in the June 9, 2016 Z.1 statistical release, are incorrect. The corrected annual values for mutual funds' holdings of Treasury bills (line 45) from 2010 to 2015 are $40.9, $36.4, $47.1, $4.3, $30.7, and $46.6 billion, respectively. Corrected quarterly values from 2015:Q1 to 2016:Q1 for mutual funds' holdings of Treasury bills (line 45) are $31.1, $32.6, $41.5, $46.6, and $49.3 billion. The corrected annual values for mutual funds' holdings of other Treasury securities (line 46) from 2010 to 2015 are $376.5, $432.9, $512.1, $468.6, $652.2, and $779.9 billion. Corrected quarterly values for mutual funds' holdings of other Treasury securities (line 46) from 2015:Q1 to 2016:Q1 are $678.3, $693.0, $747.6, $779.9, and $800.0 billion. The published values for total mutual fund holdings of Treasury securities, shown on line 44, are correct. Complete time series with these corrected values are available for download from the Federal Reserve's Data Download Program (DDP). Please use series mnemonic "FL653061113.Q" to download the Treasury bills series (line 45) and series mnemonic "FL653061125.Q" to download the other Treasury securities series (line 46) from DDP. All published files will be corrected with the September 16, 2016 Z.1 release.