One William Street Capital Management, Lp.
SEC-registered
Private Fund Manager · Large ($10B–$100B)
CRD 150522
· SEC file 801-70264
· New York, NY
· WWW.LINKEDIN.COM
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ADV data as of Mar 31, 2026
- Regulatory AUM
- $11.3B
- Discretionary
- $11.3B
- Clients
- 21
- Avg AUM / client
- $538M
- Accounts
- 22
- Employees
- 124
AUM over time
$3.4B
$11.3B
Dec 2011
Dec 2025
Annual snapshots from Form ADV filings · as of Mar 31, 2026
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Pooled investment vehicles (non-investment companies) | 21 | $11.3B | 100.0% |
| Pension and profit sharing plans | Fewer than 5 clients | $2.3M | 0.02% |
Private funds (9)
Reported in Form ADV Section 7.B.(1), filing of Mar 2024 · $9.1B combined gross assets
| Fund | Type | Domicile | Gross assets | Owners |
|---|---|---|---|---|
| One William Street Capital Master Fund, Ltd. master | Hedge Fund | Cayman Islands | $3.9B | 262 |
| Ows Credit Opportunity Master Fund, Ltd. master | Hedge Fund | Cayman Islands | $2.3B | 141 |
| Ows Lsar Master Fund, L.P. master | Hedge Fund | Cayman Islands | $1.1B | 25 |
| Ows Abs Iv, Lp | Hedge Fund | Delaware | $667M | 1 |
| Ows Abs Master Fund Ii, Lp master | Hedge Fund | Delaware | $646M | 1 |
| Ows Abs Fund Viii, Ltd. | Hedge Fund | Cayman Islands | $283M | 15 |
| Ows Global Fixed Income Fund (Usd Hedged), Ltd. | Hedge Fund | Cayman Islands | $130M | 2 |
| Ows Credit Opportunity Investment Fund, Llc | Hedge Fund | Delaware | $99.9M | 2 |
| Ows Commercial Funding Iv, Llc | Hedge Fund | Delaware | $19.3M | 2 |
People (8)
| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Locher, Kurt, Anthony | Limited Partner/Chief Operating Officer/Chief Compliance Officer | Apr 2008 (18y) | ≈ 1.25% – 5.63% via David N. Sherr 2012 Descendants' Trust | |
| Prezioso, Frank, Carmen | Limited Partner/Executive Officer | Apr 2008 (18y) | 5% – 10% | |
| Sherr, David, Neal | Limited Partner/Chief Executive Officer/Chief Investment Officer | Apr 2008 (18y) | 50% – 75% | |
| Ziffer, Matthew, Jed | Limited Partner/Executive Officer | Apr 2008 (18y) | 5% – 10% | |
| Epes, Christopher, Robinson | Chief Legal Officer | May 2008 (18y) | Less than 5% | |
| Sherr, Holly, Ann | Co Trustee | Dec 2012 (14y) | ≈ 1.25% – 5.63% via David N. Sherr 2012 Descendants' Trust | |
| Simons, Joshua, David | Limited Partner/Executive Officer | Jan 2015 (12y) | Less than 5% | |
| Dolan, Stephanie, Elizabeth | Chief Financial Officer | Feb 2018 (9y) | Less than 5% |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| Sherr Family Investments, Llc | Limited Partner | Dec 2012 | A | 5% – 10% |
| One William Street Capital Holdings, Llc | General Partner | Apr 2008 | A | Less than 5% |
| David N. Sherr 2012 Descendants' Trust | Member | Dec 2012 | B | ≈ 2.5% – 7.5% via Sherr Family Investments, Llc |
| Sherr Family Investments Iv Llc | Member | Nov 2021 | B | ≈ 0.63% – 3.75% via Holly A. Sherr 2012 Descendants' Trust |
| Holly A. Sherr 2012 Descendants' Trust | Member | Dec 2012 | B | ≈ 1.25% – 5% via Sherr Family Investments, Llc |
Undisclosed: 0% – 30% of the firm is not attributable from the filed Schedule A bands.
Estimated effective ownership (look-through of filed bands):
- Locher, Kurt, Anthony: 50% – 75% of David N. Sherr 2012 Descendants' Trust × 50% – 75% of Sherr Family Investments, Llc × 5% – 10% direct ≈ 1.25% – 5.63% of the firm
- Sherr, Holly, Ann: 50% – 75% of David N. Sherr 2012 Descendants' Trust × 50% – 75% of Sherr Family Investments, Llc × 5% – 10% direct ≈ 1.25% – 5.63% of the firm
- David N. Sherr 2012 Descendants' Trust: 50% – 75% of Sherr Family Investments, Llc × 5% – 10% direct ≈ 2.5% – 7.5% of the firm
- Sherr Family Investments Iv Llc: 50% – 75% of Holly A. Sherr 2012 Descendants' Trust × 25% – 50% of Sherr Family Investments, Llc × 5% – 10% direct ≈ 0.63% – 3.75% of the firm
- Holly A. Sherr 2012 Descendants' Trust: 25% – 50% of Sherr Family Investments, Llc × 5% – 10% direct ≈ 1.25% – 5% of the firm
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Private funds (9, $9.1B gross assets)
| Fund | Type | Gross assets | Min. investment | Owners |
|---|---|---|---|---|
| One William Street Capital Master Fund, Ltd. | Hedge Fund | $3.9B | $250K | 262 |
| Ows Credit Opportunity Master Fund, Ltd. | Hedge Fund | $2.3B | $100K | 141 |
| Ows Lsar Master Fund, L.P. | Hedge Fund | $1.1B | $100K | 25 |
| Ows Abs Iv, Lp | Hedge Fund | $667M | $5.0M | 1 |
| Ows Abs Master Fund Ii, Lp | Hedge Fund | $646M | $100K | 1 |
| Ows Abs Fund Viii, Ltd. | Hedge Fund | $283M | $100K | 15 |
| Ows Global Fixed Income Fund (Usd Hedged), Ltd. | Hedge Fund | $130M | $10.0M | 2 |
| Ows Credit Opportunity Investment Fund, Llc | Hedge Fund | $99.9M | $0 | 2 |
| Ows Commercial Funding Iv, Llc | Hedge Fund | $19.3M | $0 | 2 |
From Form ADV Section 7.B private fund reporting.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/31/2026 | 3.18 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
No disciplinary events reported on the firm's latest Form ADV filing.
How they charge
- • Percentage of assets under management
- • Performance-based fees
Services
- • Portfolio management for pooled investment vehicles
- • Portfolio management for businesses/institutional clients
Custody
Reported custodians
- BNY Mellon $296M (3% of AUM) Feb 2026
- U.S. Bank $126M (2% of AUM) Feb 2018
- Julian Hodge Bank Limited $80.7M (1% of AUM) Mar 2022
- Scotiabank $53.0M (1% of AUM) Apr 2019
- Citigroup Global Markets Inc. $51.6M (1% of AUM) Mar 2022
- J.P. Morgan $2.3M (0% of AUM) Mar 2026
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports having custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 31, 2026.
View current Form ADV (SEC/IAPD) ↗