National Security Variable Account N

08/14/2026 | Press release | Distributed by Public on 08/14/2026 09:14

Prospectus by Investment Company (Form 497)

Supplement Dated August 14, 2026

AUGUSTAR LIFE INSURANCE COMPANY

AuguStar Variable Account A

Supplement to the Prospectuses and Updating Summary Prospectuses dated May 1, 2026

for the following variable annuity contracts ("Contracts")

ONcore Flex

ONcore Flex II

ONcore Lite

ONcore Lite III

ONcore Premier

ONcore Premier II

ONcore Select 4

ONcore Select 7

ONcore Ultra II

ONcore Value

ONcore Wealth Foundation 4

ONcore Wealth Foundation 7

ONcore Wrap

ONcore Xtra

ONcore Xtra II

Supplement to the Prospectuses dated May 1, 2019 and Notice Document dated May 1, 2026

for the following variable annuity contracts ("Contracts")

Investar Vision/Top Spectrum

Top 1

Top Explorer

Top Plus

Top Tradition

AuguStar Variable Account B

Supplement to the Prospectuses dated May 1, 2019 and Notice Document dated May 1, 2026

for the following variable annuity contracts ("Contracts")

Top 1 Top Plus Top Tradition

AuguStar Variable Account D

Supplement to the Prospectuses dated May 1, 2019 and Notice Document dated May 1, 2026

for the following variable annuity contracts ("Contracts")

Retirement Advantage

AuguStar Variable Account R

Supplement to the Prospectuses dated May 1, 2019 and Notice Document dated May 1, 2026

for the following variable life contracts ("Contracts")

GP VUL

Vari-Vest II

Vari-Vest IV

Vari-Vest V

Vari-Vest Asset Builder

Vari-Vest Survivor

Virtus VUL

NATIONAL SECURITY LIFE AND ANNUITY COMPANY

National Security Variable Account N

Supplement to the Prospectuses dated May 1, 2019 and Notice Document dated May 1, 2026

for the following variable annuity contracts ("Contracts")

NScore Flex

NScore Lite

NScore Lite II

NScore Lite III

NScore Premier

NScore Premier II

NScore Value

NScore Xtra

NScore Xtra II

The following supplements and amends the above mentioned Prospectuses, Updating Summary Prospectuses and Notice Documents. Please read this supplement and retain it for future reference.

Fund Subadviser Change:

There has been a subadviser change for the Nomura VIP Asset Strategy Series, effective June 15, 2026. In the row for the Nomura VIP Asset Strategy Series (Service Class), the subadviser information for the Fund is deleted and replaced with the following:

Subadvisers: Macquarie Investment Management Global Limited, Nomura Corporate Research and Asset Management Inc.

Corrections:

For the sole purpose of correcting typographical errors in certain Fund names:

· References to the "LVIP ClearBridge Variable Dividend Strategy Portfolio" are deleted and replaced with corrected references to the "LVIP ClearBridge Dividend Strategy Portfolio."
· References to the "LVIP ClearBridge Variable Large Cap Value Portfolio" are deleted and replaced with corrected references to the "LVIP ClearBridge Large Cap Value Portfolio."
National Security Variable Account N published this content on August 14, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on August 14, 2026 at 15:14 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]