3M Co.

Jon T. Lindekugel, officer

Exercised options: 6,410 Price: $78.72

Shares sold: 6,410 Price: $203.01

Date: Aug. 10 Directly holds: 4,641

Bio-Techne Corp.

Charles A. Dinarello, director

Exercised options: 5,000 Price: $63.06

Shares sold: 5,000 Price: $176.94

Date: Aug. 8 Directly holds: 8,212

Calyxt Inc.

Daniel F. Voytas,  officer

Exercised options: 4,083 Price: $3.71

Shares sold: 4,083 Price: $17.48

Date: Aug. 8 Directly holds: 92,982

Digi International Inc.

Jon A. Nyland,  officer

Exercised options: 22,447 Price: $8.03

Shares sold: 22,447 Price:

–$13.25

Directly holds: 38,859

Ecolab Inc.

Christophe Beck,  officer

Exercised options: 25,500 Price:

–$48.06

Shares sold: 25,500 Price:

–$148.33

Directly holds: 26,270

Victoria J. Reich,  director

Exercised options: 6,700 Price: $47.48

Shares sold: 6,700 Price: $148.40

Date: Aug. 9 Directly holds: 18,787

H.B. Fuller Co.

Traci L. Jensen,  officer

Shares sold: 4,508 Price: $57.45

Date: Aug. 9 Directly holds: 14,774

Intricon Corp.

Scott Longval,  CFO

Exercised options: 15,000 Price: $4.05

Date: Aug. 14 Directly holds: na

Michael J. McKenna,  director

Exercised options: 58,945 Price:

–$6.82

Directly holds: na

Insignia Systems Inc.

Air T Inc., beneficial owner

Shares purchased: 40,000 Price:

–$1.98

Shares sold: 6,272 Price: $2.05

Date: Aug 14 Directly holds: 3,509,742

NVE Corp.

Terrence W. Glarner, director

Exercised options: 2,000 Price:

–$67.69

Shares sold: 2,000 Price: $115

Date: Aug. 15 Directly holds: 2,200

Pentair PLC

Matthew H. Peltz,  director

Shares sold: 1,700,000 Price: $42.15

Date: Aug. 13 Indirectly holds:

12,039,444

C.H. Robinson Worldwide Inc.

Michael W. Neill,  chief tech officer

Shares sold: 452 Price: $96.10

Date: Aug. 8 Directly holds: 7,788

Surmodics Inc.

Joseph J. Stich, officer

Shares sold: 2,000 Price:

–$70.06

Directly holds: 51,919

Tactile Systems Technology Inc.

William W. Burke, director

Shares sold: 5,000 Price: $58.74

Date: Aug. 9 Directly holds: 1,979

Kevin H. Roche, director

Shares sold: 15,000 Price:

–$59.25

Directly holds: 53,157

Tennant Co.

David W. Huml,  officer

Exercised options: 6,500 Price:

–$73.73

Shares sold: 6,500 Price: $79.57

Date: Aug. 8 Directly holds: 7,569

Thomas Paulson, CFO

Exercised options: 15,000 Price: $10.08

Shares sold: 15,000 Price:

–$78.87

Directly holds: 26,916

Winmark Corp.

Ronald G. Olson, beneficial owner

Shares sold: 3,565 Price: $147.50

Date: Aug. 13-15 Directly holds:

475,298