3M Co.

Michael F. Roman officer

Exercised options: 1,500 Price: $87.35

Shares sold: 1,500 Price: $170.00

Date: April 19 Directly holds: 5,935

Apogee Enterprises

Robert J. Marzec director

Exercised options: 4,311 Price: $15.05

Shares sold: 4,311 Price: $45.00

Date: April 15 Directly holds: 23,806

Richard Reynolds director

Shares sold: 2,000 Price: $45.01

Date: April 15 Directly holds: 23,242

Buffalo Wild Wings

Sally Smith CEO

Shares sold: 1,000 Price: $147.48

Date: April 15 Directly holds: 59,231

Canterbury Park Holding Corp.

Burton Dahlberg director

Shares sold: 2,840 Price: $10.25

Date: April 12 Directly holds: 14,731

Curtis Sampson major shareholder

Shares purchased: 75 Price: $10.82

Date: April 15 Directly holds: 853,005

Capella Education Co.

Stephen George Shank director

Shares sold: 5,650 Price: $50.95

Date: April 19 Indirectly holds: 18,412

Clearfield Inc.

Cheryl Podzimek Beranek CEO

Exercised options: 30,000 Price: $6.36

Date: April 19 Directly holds: na

H.b. Fuller Co.

Robert J. Martsching officer

Exercised options: 4,211 Price: $14.15

Shares sold: 4,211 Price: $44.62

Date: April 15 Directly holds: 9,416

Proto Labs Inc.

Rainer Gawlick director

Exercised options: 4,000 Price: $5.56

Shares sold: 4,000 Price: $80.00

Date: April 14 Directly holds: 3,364