Investor · Naperville, IL
John S. Koudounis
Open John in the network graph →Capital
$4.7B
across filings
Active
Jan 2016
to Jan 2025
Most-connected co-filers (56)
Thomas E. Herman · Naperville, IL13 sharedRaymond Hein · San Jose, CA10 sharedConor Walsh · George Town, Grand Cayman, Cayman Islands10 sharedDavid Watson · George Town, Grand Cayman, Cayman Islands10 sharedMatthew Holleran · Mountain View, CA10 sharedConor B. French · SAN FRANCISCO, CA9 sharedSteven E. Clark · George Town, Grand Cayamn, Cayman Islands9 sharedJohn P. Calamos, Sr · Naperville, IL9 sharedChatrasingh K. Joyram · Quatre Bornes, O48 sharedJed Dean · Emeryville, CA8 sharedRobert F. Behan · Naperville, IL8 sharedCalamos Advisors Llc · Naperville, IL6 sharedCalamos Advisors Llc · Naperville, IL6 sharedJohn B. Dahin, Jr · Altamonte Springs, FL5 sharedAdrian A. King · West Chester, PA5 sharedDaniel L. Dufresne · Naperville, IL5 sharedJennifer A. Schwartz · Wilmington, DE4 sharedDrew Dolan · Albuquerque, NM4 sharedJohn P. Calamos, Jr · Naperville, IL4 sharedCalamos Advisors LLC · Naperville, IL4 sharedDouglas Maccabe · ST. HELIER, Y94 sharedSimon Riley · ST. HELIER, Y94 sharedLeila C. Alland · Watertown, MA3 sharedDavid Hirschfeld · Phoenix, AZ3 shared Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See John in the interactive graph →