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Transfer Agent and Registrar

The transfer agent and registrar for National Instruments common stock is Computershare Trust Company N.A. Shareholders may contact the transfer agent at the address or phone number listed below.

Transfer Agent and Registrar
Computershare Trust Company, N.A.
C/O Computershare Investor Services
P. O. Box 30170
College Station, TX 77842-3170
Tel: 1-877-373-6374
Web: computershare.com/investor