3M Co.

Gregory R. Page,  director

Shares purchased: 1,000 Price: $179.60

Date: May 7 Indirectly holds: 6,750

Allete Inc.

Madeleine W. Ludlow,  director

–$82.53

Date: May 7 Indirectly holds: 14,711

Bio-Techne Corp.

James T. Hippel, CEO

Exercised options: 35,000 Price: $86.25

Shares sold: 35,000 Price: $230.08

Date: May 1 Directly holds: 4,382

Ecolab Inc.

Bruno Lavandier, officer

Shares sold: 2,969 Price: $183.27

Date: May 2 Directly holds: 7,732

Jill S. Wyant,  officer

Exercised options: 23,900 Price:

–$55.60

–$179.68

Date: May 7 Directly holds: 17,718

Fastenal Co.

Terry M. Owen,  officer

Exercised options: 1,875 Price: $54

Shares purchased: 1,875 Price: $70.62

Date: April 30 Directly holds: 4,259

John L. Soderberg,  officer

Exercised options: 30,000 Price: $56

Shares purchased: 30,000 Price: $70.62

Date: May 3 Directly holds: 5,781

Graco Inc.

Timothy R. White,  officer

Exercised options: 6,000 Price: $8.86

Shares sold: 6,000 Price: $52.18

Date: May 3 Directly holds: 47,004

Mosaic Co.

James C. O’Rourke,  CEO

Shares purchased: 10,000 Price: $24.03

Date: May 8 Directly holds: 171,345

Nortech Systems Inc.

David B. Kunin,  director, owner

–$4

Date: May 2-8 Directly holds: 1,381,005

Polaris Industries Inc.

Stephen L. Eastman,  officer

Shares sold: 8,028 Price: $97.94-$98

Date: May 1 Directly holds: 13,323

SPS Commerce Inc.

Archie C. Black,  CEO

Exercised options: 3,645 Price: $16.64

Shares sold: 8.645 Price:

–$108.05

Date: April 30 Indirectly holds: 79.264

Michael J. McConnell,  director

Exercised options: 4,785 Price:

–$74.43

Directly holds: na

Kimberly K. Nelson,  CFO

Exercised options: 20,000 Price: $16.64

–$107.72

Date: April 30 Directly holds: 51,086

Surmodics Inc.

Gary R. Maharaj,  CEO

Shares sold: 5,000 Price: $42.68

Date: May 1 Directly holds: 157,205

UnitedHealth Group

William C. Ballard Jr.,  director

Exercised options: 5,000 Price: $25.16

Shares sold: 5,000 Price: $239.02

Date: May 6 Directly holds: 72,993

Frederick W. McNabb,  director

Shares purchased: 6,430 Price: $233.21

Date: May 1 Directly holds: 7,879

David S. Wichmann,  CEO

Shares purchased: 20,000 Price: $231.79

Date: May 3 Directly holds: 904,604

U.S. Bancorp

Jeffry H. Von Gillern,  officer

Shares sold: 4,669 Price: $53.14

Date: May 1 Directly holds: 120,729

Winmark Corp.

Steven C. Zola, officer, director

Exercised options: 12,048 Price:

–$22.15

–$186

Date: April 30-May 7 Directly holds: 61,777