LORD ABBETT BOND DEBENTURE FUND, INC.

 

Supplement dated November 4, 2026 to the
Summary Prospectus, Prospectus and Statement of Additional Information, each
dated May 1, 2026

 

The following table replaces the table in the subsection under “Management—Portfolio Managers” on page 13 of the summary prospectus and the statutory prospectus:

 

Portfolio Managers/Title Member of the Portfolio
Management
Team Since
Steven F. Rocco, Partner and Co-Head of Taxable Fixed Income 2014
Robert A. Lee, Partner and Co-Head of Taxable Fixed Income 2013
Andrew H. O’Brien, Partner and Portfolio Manager 2014
Robert S. Clark, Portfolio Manager 2015
Christopher J. Gizzo, Partner and Deputy Director of Leveraged Credit 2013

 

The following paragraph replaces the fifth paragraph under “Management and Organization of the Fund” beginning on page 38 of the statutory prospectus:

 

Steven F. Rocco, Partner and Co-Head of Taxable Fixed Income, heads the Fund’s team. Mr. Rocco joined Lord Abbett in 2004. Additional members of the Fund’s team are Robert A. Lee, Partner and Co-Head of Taxable Fixed Income, Andrew H. O’Brien, Partner and Portfolio Manager, Robert S. Clark, Portfolio Manager, and Christopher J. Gizzo, Partner and Deputy Director of Leveraged Credit. Messrs. Lee, O’Brien, Clark, and Gizzo joined Lord Abbett in 1997, 1998, 2010, and 2008, respectively. Messrs. Rocco, Lee, O’Brien, Clark, and Gizzo are jointly and primarily responsible for the day-to-day management of the Fund.

 

The table under the heading titled “Portfolio Manager Information—Other Accounts Managed” on page 7-1 of the statement of additional information (“SAI”) is replaced in its entirety by the following:

 

    Number of
Registered
Investment
Companies		   Total
Assets
($MM)		   Number of
Other
Pooled
Investment
Vehicles		   Total
Assets
($MM)		   Number
of Other
Accounts		   Total
Assets
($MM)
Steven F. Rocco   20   80,827.16   13   12,059.22   10   3,843.55
Robert A. Lee   18   76,782.54   11   12,142.42   1306*   6,743.72*
Andrew H. O’Brien   15   80,963.12   8   11,993.79   23   4,373.76
Robert S. Clark   1   1,183.61   1   818.62   0   0
Christopher J. Gizzo   4   18,459.16   2   1,765.46   5   369.20

*Included in the number of other accounts and total assets are two accounts with respect to which the management fee is based on the performance of the account; such accounts total approximately $1,447.1 million in assets.

 

The table under the heading titled “Portfolio Manager Information—Holdings of Portfolio Managers” on page 7-1 of the SAI is replaced in its entirety by the following:

 

Ownership of Securities Aggregate Dollar Range of Securities
Steven F. Rocco Over $1,000,000
Robert A. Lee Over $1,000,000
Andrew H. O’Brien $100,001-$500,000
Robert S. Clark $50,001-$100,000
Christopher J. Gizzo $50,001-$100,000

 

Capitalized terms used in this Supplement shall, unless otherwise defined herein, have the same meaning as given in the Prospectuses and/or SAIs.

 

Please retain this document for your future reference.