HUGLEY DAVID 4

4 · NATIONAL INSTRUMENTS CORP /DE/ · Filed May 3, 2011

Form 4

Period: 2011-05-01

VP & General Counsel

Transactions

Exercise/Conversion
Restricted Stock Units
2011-05-01−2,504→ 3,583 total
Exp: 2020-05-01→ Common Stock (6,087 underlying)
Exercise/Conversion
Restricted Stock Units
2011-05-01−1,252→ 3,632 total
Exp: 2022-05-01→ Common Stock (4,884 underlying)
Exercise/Conversion
Restricted Stock Units
2011-05-01−1,001→ 4,399 total
Exp: 2024-05-01→ Common Stock (5,400 underlying)
Exercise/Conversion
Common Stock
2011-05-01+7,261→ 40,045 total
Exercise/Conversion
Common Stock
2011-05-02$23.98/sh+359$8,607→ 40,404 total
Exercise/Conversion
Restricted Stock Units
2011-05-01−1,252→ 2,669 total
Exp: 2021-05-01→ Common Stock (3,921 underlying)
Exercise/Conversion
Restricted Stock Units
2011-05-01−1,252→ 4,592 total
Exp: 2023-05-01→ Common Stock (5,844 underlying)

Footnotes (3)

[F1]Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
[F2]The restricted stock units vest and become exercisable based on time and performance milestones set by the Issuer.
[F3]On February 22, 2011, the common stock of National Instruments Corporation split 3-for-2, resulting in the reporting person's ownership of additional shares of common stock.

Documents

1 file