Investor · San Francisco, CA
Ernst Sack
Open Ernst in the network graph →Filings
38
SEC Form D
Connections
117
co-filers
Capital
$15.5M
across filings
Active
Mar 2019
to Jul 2022
Most-connected co-filers (117)
Samuel W. Feinburg · Los Angeles, CA15 sharedHenry J. Elkus · Los Angeles, CA15 sharedSteven Denbaars · MANCHESTER, United Kingdom15 sharedKwok Hing Frederick A. Hung · Land O Lakes, FL15 sharedJohn Paglia · Irvine, CA15 sharedAric Thorn · San Francisco, CA10 sharedBen Purcell · San Francisco, CA10 sharedHelena Special Investments Fund I Gp Llc · Los Angeles, CA9 sharedHelena Special Investments Fund I Gp Llc · Los Angeles, CA9 sharedHelena Special Investments Fund I Gp Llc · Los Angeles, CA9 sharedHelena Special Investments, Llc · Los Angeles, CA9 sharedHelena Special Investments, Llc · Los Angeles, CA9 sharedBlue Bear Investment Group, LLC · Jackson, WY8 sharedMark Fosdike · San Francisco, CA8 sharedErica E. Leblanc · Chicago, IL6 sharedJack R. Kanter · CHICAGO, IL6 sharedSwati Saini · Chicago, IL6 sharedYida Gao · San Juan, Puerto Rico6 sharedJeremiah Boucher · Las Vegas, NV6 sharedJohn Moore · Charlottesville, VA5 sharedMichelle Carpenter · Charlottesville, VA5 sharedJens M. Biertumpel · Charlottesville, VA5 sharedGordon Laurie · Charlottesville, VA5 sharedStephen M. De Jong · Vancouver, British Columbia, Canada5 shared
Recent filings (38)
Helena Special Investments Fund II LPDec 2025 · 9 co-filers$200.0MNuclearn Inc.Oct 2025 · 7 co-filers$12.0MParametrix Group Holdings, Inc.Sep 2024 · 8 co-filers$10.3MOars & Alps LLCJun 2024 · 9 co-filers$2.3MHSI Phaidra II LLCDec 2023 · 8 co-filers$805KBlue Bear Capital Partners III, LPOct 2023 · 8 co-filersHSI MAPS PBC I LLCSep 2023 · 7 co-filersOars & Alps LLCMar 2023 · 8 co-filers$1.7MOars & Alps LLCJan 2023 · 8 co-filers$1.8MHSI Fund I F&F LPDec 2022 · 10 co-filers$100.0MHelena Special Investments Fund I LPDec 2022 · 10 co-filers$100.0MBlue Bear 2022 Coinvest Fund, LPDec 2022 · 8 co-filersAXIOM CLOUD INC.Nov 2022 · 7 co-filers$15.3MBlue Bear Capital Partners III, LPOct 2022 · 8 co-filersHSI Twin Health II LLCAug 2022 · 10 co-filers$2.5MDatch Inc.Jul 2022 · 13 co-filers$15.6MHSI Phaidra I LLCJul 2022 · 10 co-filersOars & Alps LLCJun 2022 · 8 co-filers$1.2MHSI CFS I LLCJun 2022 · 7 co-filers$14.5MHSI Fund I GS LPMay 2022 · 10 co-filersHSI AETHER SPV I LLCApr 2022 · 10 co-filers$1.9MHSI AETHER SPV I LLCFeb 2022 · 10 co-filers$1.5MOars & Alps LLCJan 2022 · 8 co-filers$1000KHSI Fund I F&F LPDec 2021 · 10 co-filers$100.0MHelena Special Investments Fund I LPDec 2021 · 10 co-filers$100.0M
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Ernst in the interactive graph →