THE NORTHWESTERN MUTUAL LIFE INSURANCE
COMPANY
SUPPLEMENT TO THE PROSPECTUSES DATED MAY 1, 2025 AND JULY 1, 2025
NML VARIABLE ANNUITY ACCOUNT A
SUPPLEMENT TO THE PROSPECTUSES
FLEXIBLE PAYMENT VARIABLE ANNUITY
INDIVIDUAL FLEXIBLE PAYMENT VARIABLE ANNUITY (FEE-BASED)
NML VARIABLE ANNUITY ACCOUNT B
SUPPLEMENT TO THE PROSPECTUSES
FLEXIBLE PAYMENT VARIABLE ANNUITY
FLEXIBLE PAYMENT VARIABLE ANNUITY (FEE-BASED)
NML VARIABLE ANNUITY ACCOUNT C
SUPPLEMENT TO THE PROSPECTUSES
GROUP COMBINATION ANNUITY
INDIVIDUAL FLEXIBLE PAYMENT VARIABLE ANNUITY (NETWORK EDITION)
This Supplement updates certain information in the most recent prospectuses, initial summary prospectuses and updating
summary prospectuses, as applicable, for the above-referenced variable annuity contracts and any supplements to the prospectuses, initial summary prospectuses and updating
summary prospectuses (together the “Prospectuses”). You should read this Supplement in conjunction with your Prospectuses. Unless otherwise indicated, all other information included in the Prospectuses remains unchanged and the terms and
section headings used in this Supplement have the same meaning as in the Prospectuses. We will send you another copy of any prospectus or supplements without charge upon
request. Please retain this Supplement for future reference.
Sub-Adviser Change for Domestic Equity
Portfolio
Effective July 31, 2025, Putnam Investment Management,
LLC replaced Delaware Investments Fund Advisers, a series of Macquarie Investment Management Business Trust, as the sub-adviser for Domestic Equity Portfolio. Please note that with respect to this change, some systems and forms may temporarily reference the previous
sub-adviser for this Portfolio.
Fee Waiver Change for Emerging Markets Equity Portfolio
Effective August 1, 2025, the Current Expenses for the Emerging
Markets Equity Portfolio as set forth in Appendix A has changed from 0.89% to 0.79%.
Portfolio Name Change for Active/Passive
All Equity Portfolio
Effective on or about September 30, 2025,
the name of the Active/Passive All Equity Portfolio will be changed to “Active/Passive Very Aggressive Portfolio”. The Cover Sheet and Appendix A of the Prospectuses are amended to replace “Active/Passive All Equity Portfolio” with “Active/Passive Very Aggressive Portfolio (“Active/Passive All Equity
Portfolio” until 09/30/2025)”. Please note that with respect to this change, some systems and
forms may temporarily reference the previous Portfolio name.
Portfolio Name Change for Sustainable Equity Portfolio
Effective July 28, 2025, the name of the Sustainable Equity
Portfolio changed to “Quality Equity Portfolio”. The Cover Sheet and Appendix A of the Prospectuses are amended to replace “Sustainable Equity Portfolio” with “Quality Equity Portfolio (formerly “Sustainable Equity Portfolio”)”. Please note that with respect to this change, some systems and forms may temporarily reference the previous Portfolio name.
In light of the above changes, in APPENDIX A—Portfolios Available under Your Contract, the following rows in the table are amended to contain the following information.