Investor · West Chester, PA

Mark B. Prygocki

Open Mark in the network graph →

Filings

3

SEC Form D

Connections

25

co-filers

Capital

$50.0M

across filings

Active

Dec 2025

to Dec 2025

Most-connected co-filers (25)

Alex B. Zisson · New York, NY1 shared John F. Kirby · CLEVELAND, OH1 shared David Zawitz · West Chester, PA1 shared Gavin B. Corcoran · West Chester, PA1 shared Kimberly K. Murphy · NORTHBROOK, IL1 shared Steven A. Bourne · NORTHBROOK, IL1 shared Frank K. Jaeger · NORTHBROOK, IL1 shared Richard E. Peterson · NORTHBROOK, IL1 shared Robert E. Dudley · NORTHBROOK, IL1 shared John K. Amory · NORTHBROOK, IL1 shared Elizabeth A. Cermak · NORTHBROOK, IL1 shared Joseph K. Hernandez · NORTHBROOK, IL1 shared Diem B. Nguyen · CHARLOTTESVILLE, VA1 shared Paul B. Manning · Berkeley, CA1 shared Lawrence Eichenfield · Sherman Oaks, CA1 shared Gloria M. Vasquez · Palo Alto, CA1 shared Siak K. Tan · Palo Alto, CA1 shared Jacob M. Waugh · Palo Alto, CA1 shared Jaehoon M. Lee · Palo Alto, CA1 shared Jonah K. Shacknai · Palo Alto, CA1 shared Andrew K. Hirschberg · Palo Alto, CA1 shared Noah Rosenberg · Washington, Washington, D.C.1 shared Sean Stalfort · San Carlos, CA1 shared Jayson Rieger · San Carlos, CA1 shared

Recent filings (3)

Verrica Pharmaceuticals Inc.Dec 2025 · 19 co-filers$50.0M Verrica Pharmaceuticals Inc.Dec 2025 · 19 co-filers$50.0M Clarus Therapeutics Holdings, Inc.Dec 2021 · 19 co-filers$15.0M Clarus Therapeutics Holdings, Inc.Dec 2021 · 19 co-filers$15.0M Illustris Pharmaceuticals Inc.Mar 2017 · 13 co-filers$5.0M Illustris Pharmaceuticals Inc.Mar 2017 · 13 co-filers$5.0M

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