3M Co.

Joaquin Delgado officer

Exercised options: 16,762 Price: $84.40

Shares sold: 24,453 Price: $104.25-$104.43

Date: April 30 Directly holds: 6,192

Apogee Enterprises Inc.

Sara Hays director

Exercised options: 2,500 Price: $15.05

Shares sold: 2,500 Price: $25.37

Date: April 25 Directly holds: 19,156

Clearfield Inc.

John ReddaN JR. director

Shares sold: 5,000 Price: $6.94-$7

Date: April 30 Directly holds: 18,318

Communications Systems

Luella Gross Goldberg director

Exercised options: 3,000 Price: $7.35

Date: May 1 Holdings: 21,323

Datalink Corp.

Greg Meland director

Shares sold: 65,040 Price: $10.07-$10.98

Date: April 25-May 1 Directly holds:

1,502,430

Entegris Inc.

GMT Capital Corp. major shareholder

Shares sold: 208,400 Price: $9.45-$9.52

Date: April 29-30 Indirectly holds:

13,967,200

General Mills Inc.

Heidi Miller director

Exercised options: 60,000 Price:

$22.50-$27.56

Shares sold: 60,000 Price: $49.54

Date: April 25 Directly holds: 37,160

Graco Inc.

Eric Etchart director

Exercised options: 2,150 Price: $36.96

Date: April 29 Holdings: 3,719

Graco Inc. (cont.)

Charles Rescorla officer

Exercised options: 27,000 Price: $27.91

Shares sold: 27,000 Price: $59.65

Date: April 29 Directly holds: 62,431

Intricon Corp.

Scott Longval CFO

Shares purchased: 1,000 Price: $3.99

Date: April 30 Directly holds: 15,446

Northern Technologies International Corp.

Koh Soo Keong director

Exercised options: 666 Price: $7.75

Date: April 29 Holdings: NA

Pentair LTD.

Mark Borin officer

Exercised options: 15,712 Price:

$33.38-$33.77

Shares sold: 15,712 Price: $54.66

Date: April 25 Directly holds: 40,166

Ronald Lewis Merriman director

Exercised options: 10,000 Price: $29.80

Shares sold: 10,000 Price: $54.05

Date: April 29 Directly holds: 13,341

Polaris Industries Inc.

Stacy Bogart general counsel

Exercised options: 20,000 Price: $38.46

Shares sold: 14,700 Price: $86.34

Date: April 26 Directly holds: 30,191

Select Comfort Corp.

Karen Richard officer

Exercised options: 45,853 Price:

$0.94-$17.34

Shares sold: 45,853 Price: $18.76-$19.17

Date: April 22 Directly holds: 62,880

St. Jude Medical Inc.

Angela Craig officer

Shares sold: 3,872 Price: $41.25

Date: April 26 Directly holds: 2,214

St. Jude Medical (cont.)

Stuart Essig director

Exercised options: 5,600 Price: $38.45

Shares sold: 5,600 Price: $41.30

Date: April 26 Directly holds: 27,887

Wendy Yarno director

Exercised options: 5,600 Price: $38.45

Shares sold: 5,600 Price: $41.18

Date: April 23 Directly holds: 18,150

Target Corp.

Beth Jacob officer

Exercised options: 48,599 Price:

$33.80-$49.43

Shares sold: 48,599 Price: $69.71

Date: April 23 Directly holds: 44,316

U.S. Bancorp

Jerry Levin director

Exercised options: 43,666 Price:

$28.50-$31.20

Shares sold: 43,666 Price: $33.25

Date: April 29 Directly holds: 176,804

Paul Parker officer

Exercised options: 16,603 Price: $28.50

Shares sold: 20,074 Price: $33.28-$33.29

Date: April 29 Directly/indirectly

holds: 129,037

Unitedhealth Group Inc.

William BallarD Jr. director

Exercised options: 10,000 Price: $25.16

Shares sold: 10,000 Price: $59.05

Date: April 24 Directly holds: 63,271

Vascular Solutions Inc.

James Hennen CFO

Exercised options: 19,300 Price: $6.74

Shares sold: 10,000 Price: $15.92-$16.48

Date: April 25-26 Directly holds: 71,611

Howard Root CEO

Exercised options: 50,000 Price: $6.74

Shares sold: 50,000 Price: $16.39

Date: April 25 Directly holds: 459,570