X0202 SCHEDULE 13D/A 0001560207 XXXXXXXX LIVE 15 Common Stock, par value $0.01 per share 07/20/2026 false 0000918541 629337106 NN INC

6210 ARDREY KELL ROAD SUITE 120 CHARLOTTE NC 28277

CHRISTOPHER S. KIPER 424-253-1773 LEGION PARTNERS ASSET MANAGEMENT, LLC 12121 Wilshire Blvd, Suite 1240 Los Angeles CA 90025 RYAN NEBEL 212-451-2300 OLSHAN FROME WOLOSKY LLP 1325 Avenue of the Americas New York NY 10019 0001595909 N Legion Partners, L.P. I WC N DE 0.00 3733515.00 0.00 3733515.00 3733515.00 N 4.8 PN 0001618783 N Legion Partners, L.P. II WC N DE 0.00 406049.00 0.00 406049.00 406049.00 N 0.5 PN 0001768000 N Legion Partners Special Opportunities, L.P. XI WC N DE 0.00 858283.00 0.00 858283.00 858283.00 N 1.1 PN 0001682390 N Legion Partners, LLC AF N DE 0.00 4997847.00 0.00 4997847.00 4997847.00 N 6.4 OO 0001560207 N Legion Partners Asset Management, LLC AF N DE 0.00 4997847.00 0.00 4997847.00 4997847.00 N 6.4 IA OO 0001682389 N Legion Partners Holdings, LLC AF WC N DE 0.00 4998147.00 0.00 4998147.00 4998147.00 N 6.4 OO 0001432744 N Kiper Christopher S AF N X1 0.00 4998147.00 0.00 4998147.00 4998147.00 N 6.4 IN 0001682494 N White Raymond T. AF N X1 0.00 4998147.00 0.00 4998147.00 4998147.00 N 6.4 IN Common Stock, par value $0.01 per share NN INC 6210 ARDREY KELL ROAD SUITE 120 CHARLOTTE NC 28277 Item 4 is hereby amended to add the following: On July 20, 2026, Raymond T. White resigned as a member of the board of directors of the Issuer, effective immediately. Legion Partners, L.P. I /s/ Christopher S. Kiper 07/22/2026 Legion Partners, L.P. II /s/ Christopher S. Kiper 07/22/2026 Legion Partners Special Opportunities, L.P. XI /s/ Christopher S. Kiper 07/22/2026 Legion Partners, LLC /s/ Christopher S. Kiper 07/22/2026 Legion Partners Asset Management, LLC /s/ Christopher S. Kiper 07/22/2026 Legion Partners Holdings, LLC /s/ Christopher S. Kiper 07/22/2026 Kiper Christopher S /s/ Christopher S. Kiper 07/22/2026 White Raymond T. /s/ Raymond White 07/22/2026