One William Street Capital Management, L.P. — 13F Holdings & Portfolio
CIK 1534300 · latest 13F-HR filed 2026-08-14
One William Street Capital Management, L.P. manages $242.5M in 13F-reported U.S. long-equity assets across 15 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are HYG (49.47%), HYG (29.68%), BKLN (6.48%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 2 new positions, exited 1, added to 2, and trimmed 5.
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.
25TH FLOOR
NEW YORK, NY 10171
$242.5M
Long-equity book
15
Distinct positions
2026-06-30
Filed 2026-08-14
+2 / −1 / ↑2 / ↓5
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- INVESCO EXCH TRADED FD TR II$907.6K +6.1%
- TPG RE FIN TR INC$599.2K +7.2%
Top Trims
- COUSINS PPTYS INC-$3.9M -86.4%
- FLAGSTAR BANK NATIONAL ASSOC-$2.9M -55.8%
- ROCKET COS INC-$1.7M -73.3%
- BLACKSTONE MORTGAGE TRUST IN-$220.0K -11.5%
- NEW FORTRESS ENERGY INC-$9.7K -38.5%
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 | $120.0M | 49.47% | 1,500,000 | SH |
| 2 | ISHARES TR Call | HYG | 464288513 | $72.0M | 29.68% | 900,000 | SH |
| 3 | INVESCO EXCH TRADED FD TR II | BKLN | 46138G508 | $15.7M | 6.48% | 770,977 | SH |
| 4 | TPG RE FIN TR INC | TRTX | 87266M107 | $9.0M | 3.69% | 1,070,000 | SH |
| 5 | ISHARES TR Put | IWM | 464287655 | $8.3M | 3.41% | 27,500 | SH |
| 6 | VANGUARD SCOTTSDALE FDS | VCIT | 92206C870 | $5.9M | 2.44% | 71,700 | SH |
| 7 | FLAGSTAR BANK NATIONAL ASSOC | FLG | 649445400 | $2.3M | 0.96% | 156,000 | SH |
| 8 | APOLLO COML REAL ESTATE FIN | ARI | 03762U105 | $2.1M | 0.88% | 200,000 | SH |
| 9 | STARWOOD PPTY TR INC | STWD | 85571B105 | $1.9M | 0.77% | 114,000 | SH |
| 10 | BLACKSTONE MORTGAGE TRUST IN | BXMT | 09257W100 | $1.7M | 0.70% | 100,000 | SH |
| 11 | KKR REAL ESTATE FIN TR INC | KREF | 48251K100 | $1.4M | 0.57% | 202,000 | SH |
| 12 | SERVICE PPTYS TR | SVC | 81761L102 | $1.1M | 0.44% | 630,000 | SH |
| 13 | COUSINS PPTYS INC | CUZ | 222795502 | $617.1K | 0.25% | 20,585 | SH |
| 14 | ROCKET COS INC | RKT | 77311W101 | $603.3K | 0.25% | 38,307 | SH |
| 15 | NEW FORTRESS ENERGY INC | NFE | 644393100 | $15.5K | 0.01% | 42,564 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-14 | $242.5M | 15 | 0001172661-26-003504 |
| 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 |