Open Field Capital provides portfolio management for individuals and small businesses, portfolio management for pooled vehicles, and portfolio management for institutions. The firm advises 10 private funds.
Open Field Capital reports 16 clients. They include 10 pooled investment vehicles, 4 high-net-worth individuals and 2 other clients. Of its assets, 100.0% ($208M across 16 accounts) are managed with discretion. Of its clients, 13% are outside the U.S.
| Client type | Clients | Assets |
|---|---|---|
| High-net-worth individuals | 25% | 7% |
| Pooled investment vehicles | 63% | 53% |
| Other | 13% | 40% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| High-net-worth individuals | Fewer than 5 | $13.8M | 6.6% | $3.46M |
| Pooled investment vehicles | 10 | $111M | 53.4% | $11.1M |
| Other | Fewer than 5 | $83.1M | 39.9% | $41.5M |
| Total | 16 | $208M | 100% | — |
- Clients
- Fewer than 5
- Regulatory AUM
- $13.8M
- AUM share
- 6.6%
- Avg. per client
- $3.46M
- Clients
- 10
- Regulatory AUM
- $111M
- AUM share
- 53.4%
- Avg. per client
- $11.1M
- Clients
- Fewer than 5
- Regulatory AUM
- $83.1M
- AUM share
- 39.9%
- Avg. per client
- $41.5M
Total
- Clients
- 16
- Regulatory AUM
- $208M
- AUM share
- 100%
- Avg. per client
- —
- Clients outside the U.S.
- 13%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 10
Open Field Capital is paid through a percentage of assets under management and performance-based fees; its fees and minimums are set out in its brochures on the SEC website.
Open Field Capital (Cayman) L.P. owns 75% or more of Open Field Capital and is in turn owned by Marc Weiss (25–50%) and Open Field Capital (Cayman) L.P. Furbs, Subaccount James Stableford (25–50%). The leadership team of Open Field Capital includes Chief Investment Officer Marc Weiss and Chief Compliance Officer James Stableford. It has 4 employees.
Leadership
- James StablefordDirector of Portfolios, Chief Compliance Officer
- Marc WeissChief Investment Officer
Staff
- 4 employees
- 4 in advisory functions
- 2 soliciting firms
- Owns 75% or more of Open Field Capital LLC
Open Field Capital (Cayman) L.P.
Control person · since March 2006
- Owns 25% to 50% of Open Field Capital (Cayman) L.P.
Marc Weiss
Control person · since August 2005
- Owns 25% to 50% of Open Field Capital (Cayman) L.P.
Open Field Capital (Cayman) L.P. Furbs, Subaccount James Stableford
Control person · since August 2005
Open Field Cayman GP LLC
General partner · Control person · since October 2021
Open Field Capital LLC
Sole member · Control person · since March 2021
- Owns 25% to 50% of Open Field Capital LLC
James Stableford
Control person · since August 2005
Open Field Capital’s regulatory assets grew 2.7× from $77.5M (March 2021) to $208M (March 2026); clients rose from 5 to 16 and employees were 4 in both filings.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $208M | 16 | 4 | 1 |
| June 2025 | $163M | 15 | 4 | 1 |
| March 2024 | $135M | 12 | 4 | 1 |
| March 2023 | $105M | 11 | 4 | 1 |
| March 2022 | $152M | 11 | 4 | 1 |
| March 2021 | $77.5M | 5 | 4 | 1 |
Besides its headquarters, Open Field Capital has 0 offices, with 1 listed address in New York.
New York · 1 listed address
- 1140 Avenue of the Americas, 9th Floor, New YorkHQ
Contact and registration details
- Legal name
- Open Field Capital LLC
- Headquarters
- 1140 Avenue of the Americas, 9th Floor, New York, NY 10036-5803
- Website
- ofcap.com
- Phone
- 646-380-6611
- @open-field-capital-limited
- SEC file
- 801-64621
- Structure
- Delaware LLC
- Fiscal year end
- December
Open Field Capital uses SEI Investments ($81.6M) as custodian for its separately managed accounts. Open Field Capital has custody of client assets.
- SEI InvestmentsSEI Investments Company · Oaks, PA · $81.6M100%
At year end, Open Field Capital’s separately managed accounts were mostly in stocks (99%).
What the accounts hold
- Stocks99%
- Cash1%
How many clients does Open Field Capital have?
Open Field Capital has 16 clients and manages $208 million for them, as of March 2026. They include 10 pooled investment vehicles, 4 high-net-worth individuals and 2 other clients.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 30 March 2026
What services does Open Field Capital offer?
Open Field Capital provides portfolio management for individuals and small businesses, portfolio management for pooled vehicles, and portfolio management for institutions.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
Which custodians does Open Field Capital use?
Open Field Capital’s separately managed account assets are held at SEI Investments Company (Oaks, PA), with $81.6M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 30 March 2026
How many financial advisors does Open Field Capital have?
Open Field Capital has 0 investment adviser representatives registered with state securities authorities, out of 4 employees, and 4 perform investment advisory functions. None are registered representatives of a broker-dealer or licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does Open Field Capital invest in?
At the end of its last fiscal year, Open Field Capital’s separately managed accounts held 99% exchange-traded equities and 1% cash and equivalents. It advises 10 private funds.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Open Field Capital?
Open Field Capital is owned through a holding company by Marc Weiss and Open Field Capital (Cayman) L.P. Furbs, Subaccount James Stableford. Its direct owners are Open Field Capital (Cayman) L.P. (75% or more) and James Stableford (25% to 50%).
Source: Form ADV Part 1A, Schedules A and B, filed 30 March 2026
How does Open Field Capital get paid?
Open Field Capital is paid through a percentage of assets under management and performance-based fees. Its Form ADV lists no commissions among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
How do I contact Open Field Capital?
Open Field Capital’s main office is at 1140 Avenue of the Americas, 9th Floor, New York, NY 10036-5803. Its phone number is 646-380-6611. Its website is ofcap.com.