Allete inc.

James J. Hoolihan director

Shares sold: 800 Price: $76.49

Date: Aug. 27 Directly holds: 13,632

Appliance Recycling Ctrs. of America Inc.

Virland A. Johnson CFO

Shares purchased: 30,000 Price:

–$0.78

Directly holds: 230,000

Bio-Techne corp.

Robert V. Bumgartner director

Exercised options: 5,000 Price: $61.46

Shares sold: 5,000 Price: $188.47

Date: Aug. 24 Directly holds: 7,712

John L. Higgins director

Exercised options: 10,000 Price: $61.08

Shares sold: 10,000 Price: $187.92

Date: Aug. 23 Directly holds: 3,012

Ecolab inc.

Angela M. Busch director

Exercised options: 2,000 Price: $36.63

Date: Aug. 28 Directly holds: na

Arthur J. Higgins director

Exercised options: 8,700 Price:

–$51.74

Shares sold: 8,700 Price: $149.76

Date: Aug. 27 Directly holds: 16,863

Graco Inc.

Jack W. Eugster,  director

Exercised options: 51,600 Price:

–$11.72

Shares sold: 32,297 Price:

–$46.67

Directly holds: 96,754

Hormel Foods Corp.

James P. Snee CEO

Exercised options: 40,000 Price: $6.32

Shares sold: 21,923 Price: $37.85

Date: Aug. 28 Directly holds: 77,530

Medtronic Plc

Richard E. Kuntz officer

Exercised options: 41,227 Price: $38.81

Shares sold: 47,176 Price: $95.88

Date: Aug. 28 Directly holds: 105,403

Medtronic Plc (cont.)

Robert C. Pozen director

Exercised options: 4,484 Price:

–$44.13

Shares sold: 3,218 Price: $95.94

Date: Aug. 23 Directly holds: 60,964

NORTECH SYSTEMS INc.

David B. Kunin beneficial owner

Shares purchased: 830 Price: $4

Date: Aug. 23 Directly holds: 1,375,546

NVE Corp.

Curt A. Reynders CFO

Shares sold: 1,425 Price:

–29 $118.71–$119.63

Directly holds: 7,575

Proto Labs Inc.

Robert Bodor officer

Exercised options: 3,000 Price: $67.15

Shares sold: 3,000 Price: $145

Date: Aug. 23 Directly holds: 19,755

John A. Way CFO

Exercised options: 3,912 Price: $62.90

Shares sold: 3,912 Price:

–$146.25

Directly holds: 25,503

C.H. Robinson Worldwide Inc.

Angela K. Freeman officer

Shares sold: 1,589 Price: $97.61

Date: Aug. 24 Directly holds: 25,357

Surmodix Inc.

Lisa Wipperman Heinie director

Exercised options: 6,739 Price:

–$27.30

Directly holds: na

Susan E. Knight director

Exercised options: 7,112 Price:

–$22.58

Directly holds: na

Gregg S. Sutton officer

Exercised options: 14,824 Price:

–$23.95

Shares sold: 14,824 Price:

–$74.94

Directly holds: 9,309

TCF FINANCIAL CORP.

Michael S. Jones officer

Shares sold: 50,000 Price: $25.70

Date: Aug. 24 $90.63-$92.83

Indirectly holds: 146,541

Target CORP.

Robert M. Harrison officer

Exercised options: 9,820 Price:

–$55.46

Shares sold: 9,820 Price: $86.71

Date: Aug. 23 Directly holds: 10,314

Toro Co.

Philip A. Burkart officer

Exercised options: 17,000 Price: $10.18

Shares sold: 17,000 Price: $61.09

Date: Aug. 28 Directly holds: 116,759

Janet Katherine Cooper director

Exercised options: 3,336 Price: $9.25

Shares sold: 3,336 Price: $61.24

Date: Aug. 28 Directly holds: 24,130

Timothy P. Dordell gen. counsel

Exercised options: 44,800 Price: $14.11

Shares sold: 44,925 Price:

–$61.03

Directly/indirectly holds: 304

UnitedHealth Group

D. Ellen Wilson officer

Exercised options: 18,000 Price: $57.38

Shares sold: 15,393 Price: $264.29

Date: Aug. 24 Directly holds: 51,009

Winmark Corp.

Leah A. Goff officer

Exercised options: 2,000 Price:

–$66.29

Shares sold: 1,250 Price: $149.22

Date: Aug. 30 Directly holds: 9,250

Anthony D. Ishaug CFO

Exercised options: 6,000 Price:

–$31.19

Shares sold: 2,000 Price: $149.03

Date: Aug. 28 Directly holds: 14,250