Robert Porterfield Insider Trading

General | Insider Transactions | Monthly Overview

Address: 11500 N. MOPAC EXPWY AUSTIN 78759 TX

Companies in which Robert Porterfield is an Insider

NATIONAL INSTRUMENTS CORP

Trading Symbol: NATI
Industry: SERVICES-PREPACKAGED SOFTWARE [7372]
Position of Robert Porterfield: Vice President
Holdings: 37,728 shares
Current Value: $1,185,791
Latest Transaction: May 05 2008
$NATI Market Capitalization: $4.05B
$NATI Previous Close: $31.43

Last 4 weeks trend: HOLD
Last 3 months trend: HOLD View transactions

Latest Insider Trading Transactions of Robert Porterfield

Date	Ticker	Company	Owner	Relationship	Transaction	Code	Cost ($)	Shares	Transaction Value ($)	Total Shares	% Holdings
May 05 2008	NATI	NATIONAL INSTRUMEN ...	Porterfield Robert	Vice President	Buy	M	22.83	271	6,187	37,728	37.5 K to 37.7 K (+0.72 %)
May 05 2008	NATI	NATIONAL INSTRUMEN ...	Porterfield Robert	Vice President	Buy	M	22.83	295	6,735	37,457	37.2 K to 37.5 K (+0.79 %)
May 05 2008	NATI	NATIONAL INSTRUMEN ...	Porterfield Robert	Vice President	Option Exercise	M	0.00	640	0	4,360
May 05 2008	NATI	NATIONAL INSTRUMEN ...	Porterfield Robert	Vice President	Option Exercise	M	0.00	384	0	2,231
May 05 2008	NATI	NATIONAL INSTRUMEN ...	Porterfield Robert	Vice President	Option Exercise	M	0.00	512	0	2,506
May 05 2008	NATI	NATIONAL INSTRUMEN ...	Porterfield Robert	Vice President	Option Exercise	M	0.00	640	0	4,360
May 05 2008	NATI	NATIONAL INSTRUMEN ...	Porterfield Robert	Vice President	Option Exercise	M	0.00	640	0	3,718

View all Robert Porterfield insider transactions.