The Invesco Senior Income Trust is a closed-end fixed income mutual fund, originally established by Invesco Ltd. Its management responsibilities are shared among several Invesco affiliates, including Invesco Advisers, Inc., Invesco Asset Management Deutschland GmbH, Invesco Asset Management Limited, Invesco Asset Management (Japan) Limited, Invesco Australia Limited, Invesco Hong Kong Limited, Invesco Senior Secured Management, Inc., and Invesco Canada Ltd. The trust primarily focuses its investments within the United States' fixed income markets, specifically targeting a portfolio of floating or variable rate senior loans. These loans are extended to corporations, partnerships, and various other entities spanning diverse industries and geographic areas. Its portfolio construction is guided by fundamental analysis and a bottom-up selection methodology. The fund measures its performance against the Credit Suisse Leveraged Loan Index. Established on June 23, 1998, and headquartered in the United States, this trust was previously identified as Invesco Van Kampen Senior Income Trust and Van Kampen Senior Income Trust.