3M Co.

Gregory R. Page, director

Shares purchased: 1,000Price: $179.60

Date: May 7Indirectly holds: 6,750

Allete Inc.

Madeleine W. Ludlow, director

Shares sold: 2,000Price: $82.51–$82.53

Date: May 7Indirectly holds: 14,711

Bio-Techne Corp.

James T. Hippel, CEO

Exercised options: 35,000Price: $86.25

Shares sold: 35,000Price: $230.08

Date: May 1Directly holds: 4,382

Ecolab Inc.

Bruno Lavandier, officer

Shares sold: 2,969Price: $183.27

Date: May 2Directly holds: 7,732

Jill S. Wyant, officer

Exercised options: 23,900Price:

$48.06–$55.60

Shares sold: 29,300Price: $179.07–$179.68

Date: May 7Directly holds: 17,718

Fastenal Co.

Terry M. Owen, officer

Exercised options: 1,875Price: $54

Shares purchased: 1,875Price: $70.62

Date: April 30Directly holds: 4,259

John L. Soderberg, officer

Exercised options: 30,000Price: $56

Shares purchased: 30,000Price: $70.62

Date: May 3Directly holds: 5,781

Graco Inc.

Timothy R. White, officer

Exercised options: 6,000Price: $8.86

Shares sold: 6,000Price: $52.18

Date: May 3Directly holds: 47,004

Mosaic Co.

James C. O'Rourke, CEO

Shares purchased: 10,000Price: $24.03

Date: May 8Directly holds: 171,345

Nortech Systems Inc.

David B. Kunin, director, owner

Shares purchased: 3,209Price: $3.95–$4

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

Polaris Industries Inc.

Stephen L. Eastman, officer

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

Date: May 1Directly holds: 13,323

SPS Commerce Inc.

Archie C. Black, CEO

Exercised options: 3,645Price: $16.64

Shares sold: 8.645Price:

$103.71–$108.05

Date: April 30Indirectly holds: 79.264

Michael J. McConnell, director

Exercised options: 4,785Price:

Date: April 30$71.57–$74.43

Directly holds: na

Kimberly K. Nelson, CFO

Exercised options: 20,000Price: $16.64

Shares sold: 20,000Price: $103.71–$107.72

Date: April 30Directly holds: 51,086

Surmodics Inc.

Gary R. Maharaj, CEO

Shares sold: 5,000Price: $42.68

Date: May 1Directly holds: 157,205

UnitedHealth Group

William C. Ballard Jr., director

Exercised options: 5,000Price: $25.16

Shares sold: 5,000Price: $239.02

Date: May 6Directly holds: 72,993

Frederick W. McNabb, director

Shares purchased: 6,430Price: $233.21

Date: May 1Directly holds: 7,879

David S. Wichmann, CEO

Shares purchased: 20,000Price: $231.79

Date: May 3Directly holds: 904,604

U.S. Bancorp

Jeffry H. Von Gillern, officer

Shares sold: 4,669Price: $53.14

Date: May 1Directly holds: 120,729

Winmark Corp.

Steven C. Zola, officer, director

Exercised options: 12,048Price:

Date: April 30-May 3$13.01–$22.15

Shares sold: 7,153Price: $173.38–$186

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