Investor · South Plainfield, NJ

Matthew B. Klein

Open Matthew in the network graph →

Filings

3

SEC Form D

Connections

58

co-filers

Capital

$140.9M

across filings

Active

May 2020

to Feb 2026

Most-connected co-filers (58)

Mark E. Boulding · South Plainfield, NJ2 shared Neil W. Almstead · South Plainfield, NJ2 shared Stuart W. Peltz · South Plainfield, NJ2 shared Jerome Zeldis · Los Angeles, CA2 shared Eric E. Pauwels · South Plainfield, NJ2 shared Allan S. Jacobson · South Plainfield, NJ2 shared Dawn D. Svoronos · South Plainfield, NJ2 shared Stephanie S. Okey · South Plainfield, NJ2 shared Michael B. Schmertzler · South Plainfield, NJ2 shared David P. Southwell · South Plainfield, NJ2 shared Glenn D. Steele, Jr · South Plainfield, NJ2 shared Christine E. Utter · South Plainfield, NJ2 shared Emily E. Hill · South Plainfield, NJ2 shared Emma B. Reeve · South Plainfield, NJ2 shared Michelle Bergren · Los Angeles, CA1 shared Mark A. Hughes · WELLSBORO, PA1 shared Stephen A. Herrod · Palo Alto, CA1 shared Timothy T. Richards · Irvine, CA1 shared Frank G. Pellegrino · WELLSBORO, PA1 shared Michael Graw · VICTORIA, British Columbia, Canada1 shared Naif Hajjar · mt pleasant, SC1 shared Bobbi J. Kilmer · WELLSBORO, PA1 shared Joseph Onofrio · Orem, UT1 shared Keyur Patel · San Jose, CA1 shared

Recent filings (3)

ClearPoint Neuro, Inc.Feb 2026 · 10 co-filers$17.9M PTC THERAPEUTICS, INC.Jun 2020 · 36 co-filers$41.9M PTC THERAPEUTICS, INC.Jun 2020 · 36 co-filers$41.9M PTC THERAPEUTICS, INC.May 2020 · 39 co-filers$140.9M PTC THERAPEUTICS, INC.May 2020 · 39 co-filers$140.9M

Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Matthew in the interactive graph →