Investor · Minneapolis, MN

Charles P. Semba

Open Charles in the network graph →

Filings

14

SEC Form D

Connections

60

co-filers

Capital

$50.1M

across filings

Active

Oct 2021

to Mar 2026

Most-connected co-filers (60)

Richard M. Kuntz · Minneapolis, MN9 shared Lance G. Uggla · London, United Kingdom6 shared Scott Kellen · Minneapolis, MN5 shared James T. Parsons · Minneapolis, MN5 shared Rick Pauls · Atlanta, GA5 shared Peter Nassab · San Ramon, CA4 shared Amy Duffuor · Philadelphia, PA4 shared Richard D. Pilnik · Minneapolis, MN4 shared Johanna Wolfson · CAMBRIDGE, MA4 shared Matthew Nordan · CAMBRIDGE, MA4 shared R. M. Giuffre · Minneapolis, MN4 shared Arnold Magcale · San Ramon, CA4 shared Tanya N. Lewis · Minneapolis, MN4 shared Jean F. Tormo · New York, NY4 shared Edward C. Atsinger · Camarillo, CA3 shared Todd M. Tomlin · STAMFORD, CT3 shared Curtis Burgess · Madison, WI3 shared Jens Ashton · Provo, UT3 shared Kevin Ashton · Lindon, UT3 shared Francisco D'Souza · New York, NY3 shared Jeffrey K. Quake · Stamford, CT3 shared David J. Wambeke · Minneapolis, MN3 shared Martin Burian · Denver, CO3 shared J.W.G. W. Honeybourne · Stamford, CT3 shared

Recent filings (14)

Azolla Ventures Full-Cycle Fund II, LPMar 2026 · 2 co-filers Azolla Ventures Catalytic Fund II, LPMar 2026 · 2 co-filers DiaMedica Therapeutics Inc.Jul 2025 · 19 co-filers$30.1M DiaMedica Therapeutics Inc.Jul 2025 · 19 co-filers$30.1M DiaMedica Therapeutics Inc.Jul 2024 · 28 co-filers$11.8M DiaMedica Therapeutics Inc.Jun 2023 · 34 co-filers$37.5M DiaMedica Therapeutics Inc.Apr 2023 · 28 co-filers$750K Azolla Ventures Full-Cycle Fund I, LPSep 2022 · 8 co-filers Azolla Ventures Catalytic Fund I, LPSep 2022 · 8 co-filers Venturefund LtdApr 2022 · 4 co-filers$5.0M Azolla Ventures Full-Cycle Fund I, LPOct 2021 · 8 co-filers Azolla Ventures Catalytic Fund I, LPOct 2021 · 8 co-filers Venturefund LtdOct 2021 · 4 co-filers$344K DiaMedica Therapeutics Inc.Oct 2021 · 17 co-filers$30.0M DiaMedica Therapeutics Inc.Oct 2021 · 17 co-filers$30.0M SARcode Bioscience Inc.Jul 2011 · 13 co-filers$43.6M

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