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W Greig & Company
William George Greig founded the Miami Beach single family office in 2017, transitioning from his tenure as Portfolio Manager and CIO at William Blair.
W Greig & Company
William George Greig founded the Miami Beach single family office in 2017, transitioning from his tenure as Portfolio Manager and CIO at William Blair. The firm stewards capital for the Greig family, anchored by Michelle L. Petock, who has served as CEO since inception and oversees all investment strategies. The family's residential footprint spans multiple Di Lido Island properties and commercial holdings in Doral, Florida. Allocations span private equity, private credit, real estate, commodities, and natural resources, complemented by an internally managed hedge fund. The hedge fund's stated emphasis on female-led issuers is a deliberate mandate filter rarely formalized by single-family offices. The firm pursues direct co-investments and SPVs and has flagged venture-stage exposure, while its sports franchises portfolio and international equities roots suggest a mandate blending liquid and illiquid return streams. Geographic interests extend across North America, Europe, Asia, Africa, the Middle East, Oceania, and South America. Family entities control residential assets at 1 E Di Lido Dr and 28 W Di Lido Dr in Miami Beach, plus a commercial property at 6030 NW 102 Ave in Doral. Additional holdings include a sports franchises portfolio and a natural resources portfolio—affirming an asset mix that ties tangible, real-asset wealth to mark-to-market hedge fund strategies. The team remains lean, with no publicly disclosed employee count or LinkedIn presence. What distinguishes this office is its fusion of an internally managed hedge fund mandate with direct real-estate and franchise ownership. Most single-family offices outsource hedge fund exposure; W Greig & Company manages it in-house through a stated gender-lens investing framework—a structural feature that shapes both counterparty selection and public-market posture in ways most peers do not replicate.
General information
Firm type
Single Family Office
Year founded
2017
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Miami Beach
Corporate office
Miami Beach, FL, United States
Principals
Michelle L. Petock
CEO
William George Greig
Founder
Sector focus
Frequently asked questions
Who runs investment decisions at W Greig & Company?
CEO Michelle L. Petock oversees all investment strategies and allocations. Founder William George Greig—previously a Portfolio Manager and CIO at William Blair—serves as principal. The dual structure places day-to-day leadership with Petock, while Greig's public-equities background shapes the firm's internal hedge fund framework.
How is the hedge fund mandate structured, and why is it described as emphasizing female-led issuers?
The family office runs its hedge fund allocation in-house rather than through external managers. Public sources indicate the internally managed portfolio specifically emphasizes issuers led by women—a deliberate gender-lens filter applied to public-equity positions. This makes the office unusual among single-family vehicles, which typically do not publicly articulate gender-based investing criteria within their liquid strategies.
Does W Greig & Company co-invest alongside external GPs or funds?
Yes. The firm's confirmed investment types include direct co-investments and SPVs, alongside fund commitments spanning private equity, private credit, real estate, and natural resources. Co-investment activity suggests selective partnerships with external managers when the firm wants concentrated exposure beyond its internally managed hedge fund and directly held assets.
Where does the underlying wealth come from?
The wealth traces to William George Greig's career in international equities investment management, with the most prominent disclosed role being his tenure as Portfolio Manager and Chief Investment Officer at William Blair, a Chicago-based global investment firm. No other operating company or liquidity event has been publicly disclosed as a wealth source.
What real estate and physical assets does the family office hold directly?
Direct holdings include residential properties at 1 E Di Lido Dr and 28 W Di Lido Dr on Di Lido Island in Miami Beach, along with a commercial property at 6030 NW 102 Ave in Doral, Florida. Additional asset portfolios encompass sports franchises and natural resources, reflecting a tangible-asset orientation running parallel to the hedge fund book.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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