Investor · Ashburn, VA

Michael B. Sember

Open Michael in the network graph →

Filings

4

SEC Form D

Connections

12

co-filers

Capital

$105.3M

across filings

Active

Oct 2025

to Oct 2025

Most-connected co-filers (12)

Dennis Langer · Riviera Beach, FL2 shared James Culverwell · Tel Aviv, L32 shared Michael Myers · Greenfield, IN2 shared Natalie Leong · ASHBURN, VA2 shared Joseph Cooper · San Antonio, TX2 shared Denise Carter · ASHBURN, VA2 shared Harry George · Tucson, AZ1 shared Mark Banister · Tucson, AZ1 shared Ronald Peters · Oneonta, NY1 shared Sally B. Lawlor · Ashburn, VA1 shared Michael Blaire · Tucson, AZ1 shared Gordon Dunn · Tel Aviv, L31 shared

Recent filings (4)

Quoin Pharmaceuticals, Ltd.Oct 2025 · 15 co-filers$105.3M Quoin Pharmaceuticals, Ltd.Oct 2025 · 15 co-filers$105.3M RxActuator, Inc.Jan 2023 · 9 co-filers$500K RxActuator, Inc.Jan 2023 · 9 co-filers$500K Quoin Pharmaceuticals, Ltd.Aug 2022 · 15 co-filers$194K Quoin Pharmaceuticals, Ltd.Aug 2022 · 15 co-filers$194K RaeSedo Holding, IncAug 2022 · 1 co-filer$1.5M RaeSedo Holding, IncAug 2022 · 1 co-filer$1.5M

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