Clients
One William Street Capital Management serves 21 clients. The average client has about $538 million with the firm.
- Pooled investment vehicles21 clients100%
- Pension and profit-sharing plans0%
Show client breakdownHide client breakdown
| Client type | Clients | Regulatory AUM | Share | Avg. per client |
|---|---|---|---|---|
| Pooled investment vehicles | 21 | $11,300,174,677 | 100.0% | $538.1M |
| Pension and profit-sharing plans | Not reported | $2,309,945 | 0.0% | — |
| Total | 21 | $11,302,484,622 | 100% | $538.2M |
- Clients
- 21
- Regulatory AUM
- $11,300,174,677
- Share
- 100.0%
- Avg. per client
- $538.1M
- Clients
- Not reported
- Regulatory AUM
- $2,309,945
- Share
- 0.0%
- Avg. per client
- —
Total
- Clients
- 21
- Regulatory AUM
- $11,302,484,622
- Share
- 100%
- Avg. per client
- $538.2M
What it does
One William Street Capital Management provides portfolio management for pooled vehicles and portfolio management for institutions. It is paid through a percentage of assets and performance-based fees.
One William Street Capital Management advises 8 private funds.
100.0% of assets ($11.30B across 22 accounts) are managed with discretion. 73% of clients are outside the U.S., and 0 clients received advice without assets under management last fiscal year.
What the accounts hold
- Cash100%
Custodians
One William Street Capital Management’s client accounts are held mainly at J.P. Morgan, with 0% of managed assets. One William Street Capital Management has custody of $11.30B for 21 clients.
- OtherJ.P. Morgan, All other custodians100%
Ownership and leadership
David Sherr owns 50% to 75% of One William Street Capital Management, and David Sherr is its CEO.
- Owns 50% to 75% of One William Street Capital Management, LP.
David Sherr
Control person · since April 2008
- Owns 5% to 10% of One William Street Capital Management, LP.
Matthew Ziffer
Control person · since April 2008
- Owns 5% to 10% of One William Street Capital Management, LP.
Sherr Family Investments, LLC
since December 2012
- Owns 50% to 75% of Sherr Family Investments, LLC
David N. Sherr 2012 Descendants' Trust
Control person · since December 2012
Holly Sherr
Co-trustee · Control person · since December 2012
Kurt Locher
Co-trustee · Control person · since December 2012
Commonwealth Trust Company
Co-trustee · Control person · since December 2012
- Owns 25% to 50% of Sherr Family Investments, LLC
Holly A. Sherr 2012 Descendants' Trust
Control person · since December 2012
- Owns 50% to 75% of Holly A. Sherr 2012 Descendants' Trust
Sherr Family Investments IV LLC
Control person · since November 2021
- Owns 5% to 10% of One William Street Capital Management, LP.
Joshua Simons
Control person · since January 2015
Leadership
- David SherrLimited Partner/Chief Executive Officer/Chief Investment Officer
- Kurt LocherLimited Partner/Co-President
- Joshua SimonsLimited Partner/Co-President/Executive Officer
- Crystal FrumbergChief Financial Officer
- Arthur DamoulakisChief Compliance Officer
- Christopher EpesChief Legal Officer
- Frank PreziosoLimited Partner/Deputy Chief Investment Officer
- Matthew ZifferLimited Partner/Executive Officer
Staff
- 124 employees
- 62 in advisory functions
Reported holdings
One William Street Capital Management’s reported 13F holdings total $242.5M across 15 positions, and the ten largest make up 98.5% of it.
- $242.5M
- Reported 13F value
- 15
- Positions
- 98.5%
- In the 10 largest
- −79.4%
- Value vs. prior quarter
- iShares TR · Iboxx HI YD ETFPut49.5%
- iShares TR · Iboxx HI YD ETFCall29.7%
- Invesco Exch Traded FD TR II · SR LN ETF6.5%
- Tpg RE Fin TR Inc.3.7%
- iShares TR · Russell 2000 ETFPut3.4%
- Vanguard Scottsdale Fds · Int-term Corp.2.4%
- Flagstar Bank National Assoc1.0%
- Apollo Coml Real Estate Fin0.9%
- Starwood Ppty TR Inc.0.8%
- Blackstone Mortgage Trust IN · Com CL A0.7%
Together, the ten largest are 98.5% of reported value.
A 13F covers only exchange-traded long positions the firm holds with discretion, so this $242.5M is not its $11.30B in regulatory assets and does not represent any individual client's portfolio.
Fees
One William Street Capital Management is paid through a percentage of assets under management and performance-based fees.
One William Street Capital Management’s fee rates are not included in this profile. Find its brochure on the SEC’s site.
Offices and registrations
Besides its headquarters, One William Street Capital Management has 0 offices, with 1 listed address in 1 state.
New York · 1 listed address
- 299 Park Avenue, 25th Floor, New YorkHQ
Registration details
- Legal name
- One William Street Capital Management, LP.
- Headquarters
- 299 Park Avenue, 25th Floor, New York, NY 10171
- Phone
- 212-957-2500
- Website
- www.onewilliamstreet.com
- SEC file
- 801-70264
- Structure
- Delaware limited partnership
- Fiscal year end
- December
This directory does not report disciplinary history, for any firm or individual, in either direction. The SEC publishes the complete record, including any disciplinary events, and it is the authoritative place to check one. See this firm's record on adviserinfo.sec.gov
Common questions
How many clients does One William Street Capital Management have?
One William Street Capital Management has 21 clients and manages $11.3 billion for them, as of March 2026.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 31 March 2026
What services does One William Street Capital Management offer?
One William Street Capital Management provides 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 One William Street Capital Management use?
One William Street Capital Management’s separately managed account assets are held at J.P. Morgan Securities LLC (New York, NY), with $2,309,945. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 31 March 2026
How many financial advisors does One William Street Capital Management have?
One William Street Capital Management has 0 investment adviser representatives registered with state securities authorities, out of 124 employees, and 62 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 One William Street Capital Management invest in?
At the end of its last fiscal year, One William Street Capital Management’s separately managed accounts held 100% cash and equivalents. It advises 8 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 One William Street Capital Management?
One William Street Capital Management is owned through a chain of holding companies by Sherr Family Investments IV LLC. Its direct owners are David Sherr (50% to 75%), Matthew Ziffer (5% to 10%), Sherr Family Investments, LLC (5% to 10%) and Joshua Simons (5% to 10%).
Source: Form ADV Part 1A, Schedules A and B, filed 31 March 2026
How does One William Street Capital Management get paid?
One William Street Capital Management 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