EDGAR Filing Documents for 0001193125-12-184293

Form N-CSRS - Certified Shareholder Report, Semi-Annual:

SEC Accession No. 0001193125-12-184293

Filing Date

2012-04-26

Accepted

2012-04-26 10:02:57

Documents

Period of Report

2012-02-29

Effectiveness Date

2012-04-26

Document Format Files

Seq	Description	Document	Type	Size
1	MASTER TRUST PORTFOLIO--U.S. TREASURY RESERVES PORTFOLIO	d316856dncsrs.htm	N-CSRS	254890
2	CERTIFICATION PURSUANT TO SECTION 302	d316856dex99cert.htm	EX-99.CERT	18442
3	CERTIFICATION PURSUANT TO SECTION 906	d316856dex99906cert.htm	EX-99.906CERT	4783
	Complete submission text file	0001193125-12-184293.txt		279627

Series and Classes/Contracts Information:

Existing
	Status	Name	Ticker Symbol
CIK 0001140869
Series S000018042		U.S. Treasury Reserves Portfolio
Class/Contract C000049972		U.S. Treasury Reserves Portfolio

Mailing Address LEGG MASON & CO., LLC 55 WATER STREET, 32ND FLOOR NORTH NEW YORK NY 10041

Business Address LEGG MASON & CO., LLC 55 WATER STREET, 32ND FLOOR NORTH NEW YORK NY 10041 800-451-2010

MASTER PORTFOLIO TRUST (Filer) CIK: 0001140869 (see all company filings)