Ledger.
Investor · Boston, MA

Katherine Kostereva

Open Katherine in the network graph →
Filings
11
SEC Form D
Connections
43
co-filers
Capital
$70.0M
across filings
Active
Aug 2022
to Aug 2025

Most-connected co-filers (43)

Rajeev Dham · Raleigh, NC10 sharedRoger Hurwitz · Trevose, PA7 sharedJd Sherman · Boston, MA7 sharedGT Partners Lone Cypress GP, LLC · Irvine, CA6 sharedSean Cantwell · PITTSBURGH, PA5 sharedDavid Shepherd · Miami, FL4 sharedHaik Sahakyan · Miami, FL4 sharedDawn A. Crichard · St Helier, Y94 sharedMiguel F. Arraya · St Helier, Y94 sharedKirsten C. Valeur · St Helier, Y94 sharedPeter Dilorenzo · Miami, FL4 sharedPeter Rawlins · Toronto, Ontario, Canada3 sharedMark Christensen · Toronto, Ontario, Canada3 sharedJason Leblanc · Toronto, Ontario, Canada3 sharedTimothy H. Moran · Toronto, Ontario, Canada3 sharedAndrew D. Rigby · Salt Lake City, UT2 sharedStuart E. Huston · Durham, NC2 sharedRalph W. Kittle, Iii · Greenwich, CT2 sharedJim Gowans · Toronto, Ontario, Canada2 sharedMichael Stern · New York, NY2 sharedDon H. Newberry · Toronto, Ontario, Canada2 sharedMatthew P. Lynch · Charlotte, NC2 sharedBill H. O'Reilly · Toronto, Ontario, Canada2 sharedNorman Macdonald · Toronto, Ontario, Canada2 shared

Recent filings (11)

Altair Wealth Systems Holdings, LLCAug 2025 · 8 co-filersCreatio Inc.Jun 2025 · 14 co-filersCreatio Inc.Jun 2025 · 14 co-filersPremium Resources Ltd.Apr 2025 · 26 co-filers$30.8MAltair Wealth Systems Holdings, LLCAug 2024 · 8 co-filersPremium Nickel Resources Ltd.Jul 2024 · 30 co-filers$14.5MCreatio Inc.Jun 2024 · 14 co-filers$65.2MCreatio Inc.Jun 2024 · 14 co-filers$65.2MPremium Nickel Resources Ltd.Jan 2024 · 21 co-filers$818KAltair Wealth Systems Holdings, LLCAug 2023 · 8 co-filersHigh Enroll, LLCNov 2022 · 11 co-filers$1.0MAltair Wealth Systems Holdings, LLCAug 2022 · 8 co-filersHigh Enroll, LLCAug 2022 · 11 co-filers$1.5M

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