Investor · Los Angeles, CA
Jonathan A. Seiffer
Open Jonathan in the network graph →Filings
107
SEC Form D
Connections
323
co-filers
Capital
$549.0M
across filings
Active
Feb 2012
to Oct 2025
Most-connected co-filers (323)
Todd M. Purdy · Los Angeles, CA61 sharedJonathan D. Sokoloff · Los Angeles, CA40 sharedPierre F. Lapeyre, Jr · New York, NY29 sharedDavid M. Leuschen · New York, NY29 sharedJohn G. Danhakl · Los Angeles, CA25 sharedLance J. Schumacher · Los Angeles, CA25 sharedMichael S. Solomon · Los Angeles, CA25 sharedCody L. Franklin · Los Angeles, CA25 sharedJames D. Halper · Los Angeles, CA25 sharedJohn M. Baumer · Los Angeles, CA25 sharedTimothy J. Flynn · Los Angeles, CA25 sharedScott C. Wilson · Seattle, WA24 sharedAlfred J. Shuman · New York, NY24 sharedWilliam C. Mccollum · Los Angeles, CA24 sharedHoward Kurz · New York, NY24 sharedAndrew J. Small · New York, NY24 sharedJoseph J. Pignatelli, Jr · New York, NY24 sharedBrian C. Sheppard · Seattle, WA24 sharedJohn Defeo · Seattle, WA24 sharedEric C. Shapow · Seattle, WA24 sharedJ. K. Galashan · Los Angeles, CA23 sharedAlyse M. Wagner · Los Angeles, CA20 sharedUsama N. Cortas · Los Angeles, CA20 sharedFred Harmon · Andrews, SC19 shared
Recent filings (107)
ABK Biomedical IncNov 2025 · 41 co-filers$2.6MRiverstone Iris Continuation Fund, L.P.Oct 2025 · 11 co-filersRiverstone Iris Continuation Fund Feeder, L.P.Oct 2025 · 11 co-filersWand TopCo Inc.May 2025 · 37 co-filersWand TopCo Inc.May 2025 · 37 co-filersABK Biomedical IncMay 2025 · 41 co-filers$26.1MUnderoutfit, Inc.Jan 2025 · 12 co-filers$31.5MSun TopCo, LPOct 2024 · 15 co-filersShingle Acquisition Holdings, Inc.Apr 2024 · 21 co-filersRIVERSTONE AMBER CONTINUATION FUND, L.P.Mar 2024 · 11 co-filersUnderoutfit, Inc.Mar 2024 · 8 co-filers$5.0MWand TopCo Inc.Feb 2024 · 39 co-filersWand TopCo Inc.Feb 2024 · 39 co-filersSun TopCo, LPSep 2023 · 10 co-filersRiverstone Grizzly Feeder Fund, L.P.Sep 2023 · 12 co-filersRiverstone Grizzly Continuation Fund, L.P.Sep 2023 · 12 co-filersRiverstone Grizzly Continuation Coinvestment, L.P.Sep 2023 · 12 co-filersRiverstone Nolan ASC Coinvestment, L.P.Sep 2023 · 14 co-filersRiverstone Nolan Continuation Fund, L.P.Sep 2023 · 14 co-filersRiverstone Nolan Continuation Fund Parallel, L.P.Sep 2023 · 14 co-filersRiverstone Valor Upstream Co-Investment L.P.Aug 2023 · 13 co-filersShingle Acquisition Holdings, Inc.Apr 2023 · 21 co-filersRiverstone Bison Continuation Fund, L.P.Jan 2023 · 14 co-filersRiverstone Bison Continuation Coinvestment, L.P.Jan 2023 · 13 co-filersRiverstone Bison Rollover Fund, L.P.Jan 2023 · 13 co-filers
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Jonathan in the interactive graph →