Investor · San Francisco, CA

John S. Osterweis

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Filings

15

SEC Form D

Connections

20

co-filers

Capital

—

across filings

Active

Mar 2009

to Oct 2025

Most-connected co-filers (20)

Pamela S. Nichter · San Francisco, CA15 shared George Middlemas · Pittsburgh, PA13 shared Tuomas Sandholm · Pittsburgh, PA13 shared Osterweis Capital Management, Llc · San Francisco, CA13 shared Brandon Flickinger · Sandy, UT2 shared Mike Sodo · Sandy, UT2 shared Veena F. Rao · Pittsburgh, PA2 shared Chuck S. Nuzum · Pittsburgh, PA2 shared Matthew S. Hawryluk · Pittsburgh, PA2 shared Josh S. Blacher · Pittsburgh, PA2 shared Jonathon V. Schroeder · San Francisco, CA2 shared Dan S. Hadley · Pittsburgh, PA2 shared Raymond F. Vennare · Pittsburgh, PA2 shared Justin G. Liu · Golden, CO2 shared Thomas L. Mclaughlin · Pittsburgh, PA2 shared Shawn S. Matthews · Pittsburgh, PA2 shared Gregory S. St. Clair, Sr · Pittsburgh, PA2 shared Thomas R. Quimby · San Francisco, CA2 shared Marc Robert · New York, NY2 shared Matthew D. Diserio · New York, NY2 shared

Recent filings (15)

Predictive Oncology Inc.Oct 2025 · 26 co-filers$173.3M Predictive Oncology Inc.Oct 2025 · 26 co-filers$50.8M DAEDALUS QUALIFIED PARTNERS LPMar 2012 · 4 co-filers$500.0M DAEDALUS PARTNERS LPMar 2012 · 4 co-filers$500.0M ARXCIS PARTNERS L PMar 2012 · 4 co-filers$500.0M DAEDALUS QUALIFIED PARTNERS LPMar 2011 · 4 co-filers$500.0M ARXCIS PARTNERS L PMar 2011 · 4 co-filers$500.0M DAEDALUS PARTNERS LPMar 2011 · 4 co-filers$500.0M ICARUS QUALIFIED PARTNERS L PMar 2010 · 4 co-filers$500.0M ICARUS PARTNERS L PMar 2010 · 4 co-filers$500.0M DAEDALUS PARTNERS LPMar 2010 · 4 co-filers$500.0M ARXCIS PARTNERS L PMar 2010 · 4 co-filers$500.0M DAEDALUS QUALIFIED PARTNERS LPMar 2010 · 4 co-filers$500.0M ARXCIS PARTNERS L PMar 2009 · 4 co-filers$500.0M DAEDALUS QUALIFIED PARTNERS LPMar 2009 · 4 co-filers$500.0M

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