3M Co.

Jon T. Lindekugel, officer

Exercised options: 6,410Price: $78.72

Shares sold: 6,410Price: $203.01

Date: Aug. 10Directly holds: 4,641

Bio-Techne Corp.

Charles A. Dinarello, director

Exercised options: 5,000Price: $63.06

Shares sold: 5,000Price: $176.94

Date: Aug. 8Directly holds: 8,212

Calyxt Inc.

Daniel F. Voytas, officer

Exercised options: 4,083Price: $3.71

Shares sold: 4,083Price: $17.48

Date: Aug. 8Directly holds: 92,982

Digi International Inc.

Jon A. Nyland, officer

Exercised options: 22,447Price: $8.03

Shares sold: 22,447Price:

Date: Aug. 8-10$13.10–$13.25

Directly holds: 38,859

Ecolab Inc.

Christophe Beck, officer

Exercised options: 25,500Price:

$45.67–$48.06

Shares sold: 25,500Price:

Date: Aug. 9-10$147.12–$148.33

Directly holds: 26,270

Victoria J. Reich, director

Exercised options: 6,700Price: $47.48

Shares sold: 6,700Price: $148.40

Date: Aug. 9Directly holds: 18,787

H.B. Fuller Co.

Traci L. Jensen, officer

Shares sold: 4,508Price: $57.45

Date: Aug. 9Directly holds: 14,774

Intricon Corp.

Scott Longval, CFO

Exercised options: 15,000Price: $4.05

Date: Aug. 14Directly holds: na

Michael J. McKenna, director

Exercised options: 58,945Price:

Date: Aug. 14$3.03–$6.82

Directly holds: na

Insignia Systems Inc.

Air T Inc., beneficial owner

Shares purchased: 40,000Price:

Date: Aug. 8-10$1.86–$1.98

Shares sold: 6,272Price: $2.05

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

NVE Corp.

Terrence W. Glarner, director

Exercised options: 2,000Price:

$56.76–$67.69

Shares sold: 2,000Price: $115

Date: Aug. 15Directly holds: 2,200

Pentair PLC

Matthew H. Peltz, director

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

Date: Aug. 13Indirectly holds:

12,039,444

C.H. Robinson Worldwide Inc.

Michael W. Neill, chief tech officer

Shares sold: 452Price: $96.10

Date: Aug. 8Directly holds: 7,788

Surmodics Inc.

Joseph J. Stich, officer

Shares sold: 2,000Price:

Date: Aug. 10$67.03–$70.06

Directly holds: 51,919

Tactile Systems Technology Inc.

William W. Burke, director

Shares sold: 5,000Price: $58.74

Date: Aug. 9Directly holds: 1,979

Kevin H. Roche, director

Shares sold: 15,000Price:

Date: Aug. 8-10$57.37–$59.25

Directly holds: 53,157

Tennant Co.

David W. Huml, officer

Exercised options: 6,500Price:

$73.20–$73.73

Shares sold: 6,500Price: $79.57

Date: Aug. 8Directly holds: 7,569

Thomas Paulson, CFO

Exercised options: 15,000Price: $10.08

Shares sold: 15,000Price:

Date: Aug. 9$78.29–$78.87

Directly holds: 26,916

Winmark Corp.

Ronald G. Olson, beneficial owner

Shares sold: 3,565Price: $147.50

Date: Aug. 13-15Directly holds:

475,298