Western Asset Municipal Partners Fund Inc. (NYSE: MNP) is a closed-end fixed income mutual fund that primarily invests in investment grade, tax-exempt municipal securities issued by U.S. states, local governments, territories, political subdivisions, agencies, and public authorities to seek a high level of current income exempt from regular federal income taxes, consistent with preservation of principal. The fund's portfolio emphasizes intermediate- and long-term municipal debt securities rated in one of the four highest categories by nationally recognized statistical rating organizations, including general obligation bonds, revenue bonds, and other tax-exempt obligations across sectors such as transportation, healthcare, water and sewer, and industrial revenue; it benchmarks performance against the Bloomberg Municipal Bond Index (formerly Lehman Brothers or Barclays Municipal Bond Index). Launched in 1993 and domiciled in the United States, the fund is managed by Legg Mason Partners Fund Advisor, LLC (now under Franklin Templeton following the 2020 acquisition of Legg Mason by Franklin Resources, Inc.) and co-managed by Western Asset Management Company, LLC, with operations focused on the U.S. fixed income markets serving institutional and retail investors seeking tax-advantaged income.
In a major strategic reorganization completed on October 16, 2023, the fund merged with and into Western Asset Managed Municipals Fund Inc. (NYSE: MMU), with MNP common stockholders receiving MMU common shares on a tax-free basis and all outstanding auction rate cumulative preferred shares of both funds redeemed prior to closing. This merger followed stockholder approvals in August 2023 for MNP (and July 2023 for MMU), aimed at achieving economies of scale, enhanced liquidity, greater asset diversification, and streamlined operations across a larger combined asset base of approximately $595 million post-merger. The transaction was part of broader consolidation efforts among Legg Mason-affiliated closed-end municipal funds and aligned with Franklin Templeton's integration of Legg Mason assets acquired in 2020. As of late 2025, MNP shares are marked as potentially delisted, reflecting the fund's cessation as a standalone entity.