Porterfield Robert

Vice President at NATIONAL INSTRUMENTS CORP · on record since Feb 1, 2006

Insider trading activity of Porterfield Robert

Transactions on record: 215; since Nov 12, 2004

Open-market buys: 0

Open-market sells: 73; $3M

Companies traded: 1; last filing Nov 9, 2011

Figures computed from official regulatory filings — .

Companies where Porterfield Robert has traded

NATIONAL INSTRUMENTS CORP215 tx · $4.8M · Nov 9, 2011

Track record of Porterfield Robert

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Porterfield Robert

Co-insiders of Porterfield Robert

ALMGREN RAYNATIONAL INSTRUMENTS CORP
Benjamin ThomasNATIONAL INSTRUMENTS CORP
Berenbaum DanielNATIONAL INSTRUMENTS CORP
BERRA JOHN MNATIONAL INSTRUMENTS CORP
CARLTON DONALD MNATIONAL INSTRUMENTS CORP
CASHMAN JAMES E IIINATIONAL INSTRUMENTS CORP
DANIELS R GARYNATIONAL INSTRUMENTS CORP
DAVERN ALEXANDER MNATIONAL INSTRUMENTS CORP
DEHNE TIMOTHY RNATIONAL INSTRUMENTS CORP
DELLY GAYLA JNATIONAL INSTRUMENTS CORP
Favre RituNATIONAL INSTRUMENTS CORP
Fettweis Gerhard PaulNATIONAL INSTRUMENTS CORP
FINGER MARKNATIONAL INSTRUMENTS CORP
GRAFF JOHNNATIONAL INSTRUMENTS CORP
Green Jason ElliotNATIONAL INSTRUMENTS CORP
GRIFFIN LIAMNATIONAL INSTRUMENTS CORP
Hester Phillip DNATIONAL INSTRUMENTS CORP
HUGLEY DAVIDNATIONAL INSTRUMENTS CORP
KODOSKY JEFFREY LNATIONAL INSTRUMENTS CORP
LE DUY LOAN TNATIONAL INSTRUMENTS CORP
McGrath Michael ENATIONAL INSTRUMENTS CORP
MEDICA JOHN KNATIONAL INSTRUMENTS CORP
NATIONAL INSTRUMENTS CORP /DE/NATIONAL INSTRUMENTS CORP
Rapp Karen MarieNATIONAL INSTRUMENTS CORP
RAVEL MIHIRNATIONAL INSTRUMENTS CORP
RAZDAN ASHNATIONAL INSTRUMENTS CORP
ROESSLEIN CHARLES JNATIONAL INSTRUMENTS CORP
Roiko John CharlesNATIONAL INSTRUMENTS CORP
Rust Scott ArthurNATIONAL INSTRUMENTS CORP
Starkloff Eric HowardNATIONAL INSTRUMENTS CORP
STREETMAN BEN GARLANDNATIONAL INSTRUMENTS CORP
Sublett Carla PineyroNATIONAL INSTRUMENTS CORP

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
NATIONAL INSTRUMENTS CORPListing unverified	Nov 9, 2011	Exercise	283	21.96 USD	$6.2K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 9, 2011	Exercise	350	21.96 USD	$7.7K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,001	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,001	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-2,504	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	Exercise	7,261	—	n/a (No price was disclosed in the filing)		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-751	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,001	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	Exercise	5,257	—	n/a (No price was disclosed in the filing)		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	Exercise	297	23.98 USD	$7.1K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Apr 22, 2011	AwardD (derivative)	6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Apr 22, 2011	AwardD (derivative)	6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Mar 2, 2011	Exercise	234	29.55 USD	$6.9K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Mar 2, 2011	Sell	-8,514	31.18 USD	$265.5K	Unusual size	SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Exercise	6,000	21.04 USD	$126.2K	Unusual size	SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Exercise	61	27.12 USD	$1.7K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Exercise	265	24.98 USD	$6.6K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Sell	-3,000	34.75 USD	$104.3K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Exercise	6,000	21.04 USD	$126.2K	Unusual size	SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	ExerciseD (derivative)	-6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
NATIONAL INSTRUMENTS CORPListing unverified	Nov 9, 2011	Exercise	283	21.96 USD	$6.2K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 9, 2011	Exercise	350	21.96 USD	$7.7K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,001	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,001	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-2,504	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	Exercise	7,261	—	n/a (No price was disclosed in the filing)		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-751	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,001	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	Exercise	5,257	—	n/a (No price was disclosed in the filing)		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	ExerciseD (derivative)	-1,252	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	May 4, 2011	Exercise	297	23.98 USD	$7.1K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Apr 22, 2011	AwardD (derivative)	6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Apr 22, 2011	AwardD (derivative)	6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Mar 2, 2011	Exercise	234	29.55 USD	$6.9K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Mar 2, 2011	Sell	-8,514	31.18 USD	$265.5K	Unusual size	SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Exercise	6,000	21.04 USD	$126.2K	Unusual size	SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Exercise	61	27.12 USD	$1.7K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Exercise	265	24.98 USD	$6.6K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Sell	-3,000	34.75 USD	$104.3K		SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	Exercise	6,000	21.04 USD	$126.2K	Unusual size	SEC
NATIONAL INSTRUMENTS CORPListing unverified	Nov 4, 2010	ExerciseD (derivative)	-6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC