One William Street Capital Management, L.P. — 13F Holdings & Portfolio
CIK 1534300 · latest 13F-HR filed 2026-05-14
One William Street Capital Management, L.P. manages $1.18B in 13F-reported U.S. long-equity assets across 16 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are HYG (86.48%), BKLN (3.46%), HYG (3.37%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 8 new positions, exited 3, added to 1, and trimmed 1.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$1.18B
Long-equity book
16
Distinct positions
2026-03-31
Filed 2026-05-14
+8 / −3 / ↑1 / ↓1
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
New Positions
- INVESCO EXCH TRADED FD TR II$14.8M
- VANGUARD SCOTTSDALE FDS$5.9M
- STATE STR SPDR S&P 500 ETF T$4.9M
- COUSINS PPTYS INC$4.5M
- ROCKET COS INC$2.3M
Exited Positions
- INVESCO EXCHANGE TRADED FD T$28.7M
- ISHARES TR$4.0M
- GOLDMAN SACHS BDC INC$742.4K
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | ISHARES TR Put | HYG | 464288513 | $1.02B | 86.48% | 12,815,900 | SH |
| 2 | INVESCO EXCH TRADED FD TR II Call | BKLN | 46138G508 | $40.8M | 3.46% | 2,000,000 | SH |
| 3 | ISHARES TR Call | HYG | 464288513 | $39.8M | 3.37% | 500,000 | SH |
| 4 | STATE STR SPDR S&P 500 ETF T Put | SPY | 78462F103 | $16.3M | 1.38% | 25,000 | SH |
| 5 | INVESCO EXCH TRADED FD TR II | BKLN | 46138G508 | $14.8M | 1.26% | 725,000 | SH |
| 6 | ISHARES TR Put | IWM | 464287655 | $10.5M | 0.89% | 42,500 | SH |
| 7 | TPG RE FIN TR INC | TRTX | 87266M107 | $8.4M | 0.71% | 1,070,000 | SH |
| 8 | VANGUARD SCOTTSDALE FDS | VCIT | 92206C870 | $5.9M | 0.50% | 71,700 | SH |
| 9 | FLAGSTAR BANK NATIONAL ASSOC | FLG | 649445400 | $5.3M | 0.45% | 400,000 | SH |
| 10 | STATE STR SPDR S&P 500 ETF T | SPY | 78462F103 | $4.9M | 0.41% | 7,500 | SH |
| 11 | COUSINS PPTYS INC | CUZ | 222795502 | $4.5M | 0.38% | 200,500 | SH |
| 12 | ROCKET COS INC | RKT | 77311W101 | $2.3M | 0.19% | 158,337 | SH |
| 13 | APOLLO COML REAL ESTATE FIN | ARI | 03762U105 | $2.1M | 0.18% | 200,000 | SH |
| 14 | STARWOOD PPTY TR INC | STWD | 85571B105 | $2.0M | 0.17% | 114,000 | SH |
| 15 | BLACKSTONE MORTGAGE TRUST IN | BXMT | 09257W100 | $1.9M | 0.16% | 100,000 | SH |
| 16 | NEW FORTRESS ENERGY INC | NFE | 644393100 | $25.1K | 0.00% | 42,564 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-14 | $1.18B | 16 | 0001172661-26-001917 |
| 2025-12-31 | 2026-02-17 | $745.4M | 8 | 0001172661-26-000841 |
| 2025-09-30 | 2025-11-13 | $287.6M | 7 | 0001172661-25-004744 |