Windsor Capital Management

Windsor Capital Management

Windsor Capital Management launched in 2000 when John O. Harrington established the registered investment advisor in Phoenix, Arizona. The firm provides portfolio management, retirement planning, and sub-advisory services to a client base that includes high-net-worth individuals, families, and assorted business entities. Harrington structured Windsor as a fee-based advisory practice rather than a brokerage, placing fiduciary obligation at the center of the engagement model. The firm's investment approach rests on constructing tailored portfolios across equities, fixed income, and alternative allocations. Windsor operates as a discretionary manager, selecting individual securities and third-party funds rather than running pooled vehicles of its own. The practice spans asset allocation design, manager due diligence, and ongoing monitoring for retirement accounts, trusts, and corporate cash management mandates. Geographic focus remains predominantly domestic US markets, though the firm evaluates international exposures where client objectives warrant. As a privately held RIA based in Phoenix, Windsor Capital Management maintains a deliberately lean footprint consistent with many independent advisory shops in the Southwest. The firm reports no separate institutional vehicles, no commingled funds, and no public philanthropic foundation adjacent to its advisory business. Team size, total assets under advisement, and specific client concentration figures remain undisclosed in the firm's regulatory filings and public communications. The firm's structural differentiator is its fiduciary-only posture within the fragmented US wealth management landscape. Unlike wirehouse-affiliated advisory teams or broker-dealer platforms, Windsor operates as a standalone RIA where investment recommendations are legally obligated to serve client interests. This architecture attracts mandates from families and businesses seeking a separation between advice and product distribution.