Allete inc.

James J. Hoolihan director

Shares sold: 800Price: $76.49

Date: Aug. 27Directly holds: 13,632

Appliance Recycling Ctrs. of America Inc.

Virland A. Johnson CFO

Shares purchased: 30,000Price:

Date: Aug. 24-27$0.71–$0.78

Directly holds: 230,000

Bio-Techne corp.

Robert V. Bumgartner director

Exercised options: 5,000Price: $61.46

Shares sold: 5,000Price: $188.47

Date: Aug. 24Directly holds: 7,712

John L. Higgins director

Exercised options: 10,000Price: $61.08

Shares sold: 10,000Price: $187.92

Date: Aug. 23Directly holds: 3,012

Ecolab inc.

Angela M. Busch director

Exercised options: 2,000Price: $36.63

Date: Aug. 28Directly holds: na

Arthur J. Higgins director

Exercised options: 8,700Price:

$47.48–$51.74

Shares sold: 8,700Price: $149.76

Date: Aug. 27Directly holds: 16,863

Graco Inc.

Jack W. Eugster, director

Exercised options: 51,600Price:

$6.73–$11.72

Shares sold: 32,297Price:

Date: Aug. 27-28$46.65–$46.67

Directly holds: 96,754

Hormel Foods Corp.

James P. Snee CEO

Exercised options: 40,000Price: $6.32

Shares sold: 21,923Price: $37.85

Date: Aug. 28Directly holds: 77,530

Medtronic Plc

Richard E. Kuntz officer

Exercised options: 41,227Price: $38.81

Shares sold: 47,176Price: $95.88

Date: Aug. 28Directly holds: 105,403

Medtronic Plc (cont.)

Robert C. Pozen director

Exercised options: 4,484Price:

$29.96–$44.13

Shares sold: 3,218Price: $95.94

Date: Aug. 23Directly holds: 60,964

NORTECH SYSTEMS INc.

David B. Kunin beneficial owner

Shares purchased: 830Price: $4

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

NVE Corp.

Curt A. Reynders CFO

Shares sold: 1,425Price:

Date: Aug. 22–29$118.71–$119.63

Directly holds: 7,575

Proto Labs Inc.

Robert Bodor officer

Exercised options: 3,000Price: $67.15

Shares sold: 3,000Price: $145

Date: Aug. 23Directly holds: 19,755

John A. Way CFO

Exercised options: 3,912Price: $62.90

Shares sold: 3,912Price:

Date: Aug. 24$145.51–$146.25

Directly holds: 25,503

C.H. Robinson Worldwide Inc.

Angela K. Freeman officer

Shares sold: 1,589Price: $97.61

Date: Aug. 24Directly holds: 25,357

Surmodix Inc.

Lisa Wipperman Heinie director

Exercised options: 6,739Price:

Date: Aug 24$23.50–$27.30

Directly holds: na

Susan E. Knight director

Exercised options: 7,112Price:

Date: Aug 28$20.37–$22.58

Directly holds: na

Gregg S. Sutton officer

Exercised options: 14,824Price:

$19.42–$23.95

Shares sold: 14,824Price:

Date: Aug 23$74.11–$74.94

Directly holds: 9,309

TCF FINANCIAL CORP.

Michael S. Jones officer

Shares sold: 50,000Price: $25.70

Date: Aug. 24$90.63-$92.83

Indirectly holds: 146,541

Target CORP.

Robert M. Harrison officer

Exercised options: 9,820Price:

$48.88–$55.46

Shares sold: 9,820Price: $86.71

Date: Aug. 23Directly holds: 10,314

Toro Co.

Philip A. Burkart officer

Exercised options: 17,000Price: $10.18

Shares sold: 17,000Price: $61.09

Date: Aug. 28Directly holds: 116,759

Janet Katherine Cooper director

Exercised options: 3,336Price: $9.25

Shares sold: 3,336Price: $61.24

Date: Aug. 28Directly holds: 24,130

Timothy P. Dordell gen. counsel

Exercised options: 44,800Price: $14.11

Shares sold: 44,925Price:

Date: Aug. 28$61.02–$61.03

Directly/indirectly holds: 304

UnitedHealth Group

D. Ellen Wilson officer

Exercised options: 18,000Price: $57.38

Shares sold: 15,393Price: $264.29

Date: Aug. 24Directly holds: 51,009

Winmark Corp.

Leah A. Goff officer

Exercised options: 2,000Price:

$59.77–$66.29

Shares sold: 1,250Price: $149.22

Date: Aug. 30Directly holds: 9,250

Anthony D. Ishaug CFO

Exercised options: 6,000Price:

$18.40–$31.19

Shares sold: 2,000Price: $149.03

Date: Aug. 28Directly holds: 14,250