About Arthur Karell
Arthur Karell is a director at Fortastra.
Form D filings also name Arthur Karell as a director at Vanguard Defense and AnySignal.
Arthur Karell appears on fund filings for First In.
Arthur Karell first appears on SEC filings in 2024.
Experience
This experience comes from SEC filings. The years are when the filings name Arthur Karell in the role, so the role may have started earlier or lasted longer.
Fortastra Corp
Director
2026 · Torrance, CA
Fortastra builds spacecraft to protect government and commercial assets in orbit.
FI
Vanguard Defense, Inc.
Director
2026 · Fullerton, CA
Provides defense companies with data labeling and model oversight by U.S. veterans.
Key Colleagues at Startups
The people Arthur Karell works with at each company, as listed on that company's latest Form D.
Fortastra Corp · Form D, Oct 8, 2026
MS
Michael Smayda
CEO and director
NK
Nick Kim
Director
Vanguard Defense, Inc. · Form D, Mar 10, 2026
AnySignal, Inc. · Form D, Jun 12, 2025
MS
Mark Suster
Director
JM
John Malsbury
Executive officer, director and promoter
JO
Jeffrey Osborne
Chief Financial Officer
RM
Ricardo Medina
Executive officer, director and promoter