Investor · Grand Cayman, Cayman Islands
William E. Walmsley
Open William in the network graph →Filings
730
SEC Form D
Connections
1,113
co-filers
Capital
$208.7B
across filings
Active
Mar 2014
to Mar 2026
Most-connected co-filers (1,113)
John G. Rowland · London, United Kingdom201 sharedUbs O'Connor Llc · Chicago, IL130 sharedPhilip N. Dickie · Grand Cayman, Cayman Islands123 sharedMagnetar Financial Llc · Evanston, IL105 sharedUbs O'Connor Llc · Chicago, IL105 sharedMagnetar Financial Llc · Evanston, IL105 sharedChase Rodriguez · Boca Raton, FL96 sharedAlec N. Litowitz · Evanston, IL93 sharedRandy E. Ross · Miami, FL93 sharedRandall Royer · Chicago, IL90 sharedGeorge E. Halaby · Chicago, IL86 sharedWilliam J. Ferri · Stamford, CT85 sharedJonathan Medved · Jerusalem, L384 sharedRichmond Fpc Gilder Greek GP LLC · RALEIGH, NC79 sharedCassandra A. Powell · Grand Cayman, Cayman Islands70 sharedRobert J. Meschi · George Town, Cayman Islands69 sharedS. A. Milgate · Grand Cayman, Cayman Islands58 sharedJohn N. Hawkins · St Martins, Y756 sharedDarren J. Stainrod · GRAND CAYMAN, Cayman Islands54 sharedJoseph C. Workman · Chicago, IL53 sharedBrian K. Eden · Grand Cayman, Cayman Islands53 sharedAlan P. Milgate · Grand Cayman, Cayman Islands53 sharedConnor E. Burke · Chicago, IL52 sharedPeter J. Anderson · Dublin 1, Ireland49 shared
Recent filings (730)
TREXQUANT ONSHORE FUND LPMar 2026TREXQUANT OFFSHORE FUND LTD.Mar 2026 · 2 co-filersMASON CAPITAL L PMar 2026 · 3 co-filersMASON CAPITAL LTDMar 2026 · 3 co-filersTrexquant Portable Alpha Onshore Fund LPDec 2025 · 1 co-filerTREXQUANT ONSHORE FUND LPMar 2025 · 1 co-filerTREXQUANT OFFSHORE FUND LTD.Mar 2025 · 7 co-filersMASON CAPITAL L PMar 2025 · 7 co-filersMASON CAPITAL LTDMar 2025 · 8 co-filersMagnetar PRA Fund LtdNov 2024 · 9 co-filersTREXQUANT OFFSHORE FUND LTD.Mar 2024 · 7 co-filersTREXQUANT ONSHORE FUND LPMar 2024 · 1 co-filerMASON CAPITAL LTDMar 2024 · 8 co-filersMASON CAPITAL L PMar 2024 · 7 co-filersTREXQUANT OFFSHORE FUND LTD.Apr 2023 · 7 co-filersTREXQUANT ONSHORE FUND LPApr 2023 · 1 co-filerTREXQUANT OFFSHORE FUND LTD.Mar 2023 · 7 co-filersTREXQUANT ONSHORE FUND LPMar 2023 · 1 co-filerMASON CAPITAL LTDMar 2023 · 8 co-filersMASON CAPITAL L PMar 2023 · 7 co-filersSR GLOBAL FUND L PJan 2023 · 10 co-filersSR GLOBAL FUND INCJan 2023 · 7 co-filersA&Q Neutral Alpha Strategies LtdDec 2022 · 6 co-filersA&Q Special Opportunities Fund LLCDec 2022 · 8 co-filersMagnetar Constellation Fund, LtdDec 2022 · 8 co-filers
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See William in the interactive graph →