Investor · Dublin, OH

Grant R. Koster

Open Grant in the network graph →

Filings

2

SEC Form D

Connections

7

co-filers

Capital

$5.0M

across filings

Active

Nov 2024

to Feb 2026

Most-connected co-filers (7)

Mike R. Louge · Dublin, OH2 shared J. R. Eder · Dublin, OH2 shared Mark Shary · Columbus, OH2 shared H. D. Shockley · Austin, TX1 shared Emma R. Off · Dublin, OH1 shared Chris R. Slee · Dublin, OH1 shared Matthew R. Wald · Dublin, OH1 shared

Recent filings (2)

LainaHealth Inc.Feb 2026 · 4 co-filers$6.0M IncludeHealth, Inc.Nov 2024 · 6 co-filers$6.1M

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