One William Street Capital Management, L.P.
CIK 1534300 · View on SEC EDGAR ↗
- Portfolio value
- $242.5M
- Positions
- 15
- As of
- June 30, 2026
Portfolio value QoQ: -79.4% 13F does not disclose cash
- Top 10 holdings weight
- 98.48%
- Top 25 holdings weight
- 100.00%
- Positions above 1%
- 6
- Effective number of positions
- 2.9
Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)
Turnover Q2 2026: 4.98% Est. buys $35,370,931 · sells $941,505,004
Median holding: 2.0 quarters Tracked Q4 2024–Q2 2026 · 60.0% still held
- New positions
- 2
- Increased
- 2
- Decreased
- 5
- Closed
- 1
Put-notional exposure: 52.9% puts 13F reports option positions at underlying notional value — may include hedges, not necessarily bearish bets
On this page
- Sector breakdown How the portfolio splits across market sectors.
- Portfolio Every stock this institution reports holding, from its latest 13F.
- Biggest new bets Brand-new positions opened in the latest quarter.
- Top moves The biggest position increases and decreases this quarter.
- Exited positions Positions the manager fully sold out of last quarter.
Sector breakdown
Full portfolio 15 positions
| Type | Streak | 8Q trend | |||||
|---|---|---|---|---|---|---|---|
| HYG | $119,955,000 | 49.47% | 1,500,000 | Put option | $-899,678,004 | Down ×1 | |
| HYG | $71,973,000 | 29.68% | 900,000 | Call option | $32,193,000 | Up ×1 | |
| BKLN | $15,704,801 | 6.48% | 770,977 | $907,551 | Up ×1 | ||
| TRTX TPG RE Finance Trust, Inc. Common Stock | $8,955,900 | 3.69% | 1,070,000 | $599,200 | |||
| IWM | $8,262,375 | 3.41% | 27,500 | Put option | $-2,277,625 | Down ×1 | |
| VCIT Vanguard Intermediate-Term Corporate Bond ETF | $5,926,005 | 2.44% | 71,700 | $-7,170 | |||
| FLG Flagstar Bank, N.A. Common Stock | $2,330,640 | 0.96% | 156,000 | $-2,937,360 | Down ×1 | ||
| ARI Apollo Commercial Real Estate Finance, Inc | $2,136,000 | 0.88% | 200,000 | $24,000 | |||
| STWD STARWOOD PROPERTY TRUST, INC. Starwood Property Trust Inc. | $1,867,320 | 0.77% | 114,000 | $-95,760 | |||
| BXMT Blackstone Mortgage Trust, Inc. Common Stock | $1,695,000 | 0.70% | 100,000 | $-220,000 | |||
| KREF KKR Real Estate Finance Trust Inc. Common Stock | $1,381,680 | 0.57% | 202,000 | Up ×1 | |||
| SVC Service Properties Trust - Shares of Beneficial Interest | $1,064,700 | 0.44% | 630,000 | Up ×1 | |||
| CUZ Cousins Properties Incorporated Common Stock | $617,138 | 0.25% | 20,585 | $-3,908,147 | Down ×1 | ||
| RKT Rocket Companies, Inc. Class A Common Stock | $603,335 | 0.25% | 38,307 | $-1,652,967 | Down ×1 | ||
| NFE New Fortress Energy Inc. - Class A Common Stock | $15,455 | 0.01% | 42,564 | $-9,658 | |||
| No matches | |||||||
Biggest new bets
New positions opened this quarter, largest first.
Top movers (QoQ)
| Security | Action | Shares Δ | Value Δ |
|---|---|---|---|
| HYG | Bought more | +400K | +$32.2M |
| FLG | Trimmed | -244K | -$2.9M |
| IWM | Trimmed | -15K | -$2.3M |
| RKT | Trimmed | -120K | -$1.7M |
| BKLN | Bought more | +46K | +$908K |
| TRTX | Price move only | +0 | +$599K |
| BXMT | Price move only | +0 | -$220K |
| STWD | Price move only | +0 | -$96K |
| ARI | Price move only | +0 | +$24K |
| NFE | Price move only | +0 | -$10K |
2 positions hidden (data completeness check)
Exited positions
Includes corporate events (mergers, delistings) — not all exits are sells
Closed positions reflect 13F reporting changes; for index managers these are often mechanical (delisting, M&A, index rebalancing), not active decisions.
| Security | Quarter | Shares before | Value before | Price since exit |
|---|---|---|---|---|
| IWM | March 31, 2025 | 448,100 | $99,012,176 | No longer tracked |
| IYR | March 31, 2025 | 852,700 | $79,352,262 | No longer tracked |
| RSP | March 31, 2026 | 150,000 | $28,734,000 | No longer tracked |
| SPY | Sept. 30, 2025 | 35,000 | $21,624,750 | No longer tracked |
| SPY | June 30, 2026 | 32,500 | $21,136,050 | No longer tracked |
| BKLN | Sept. 30, 2025 | 500,000 | $10,460,000 | No longer tracked |
| BKLN | March 31, 2025 | 390,830 | $8,234,788 | No longer tracked |
| VCIT | Dec. 31, 2025 | 71,700 | $6,030,687 | |
| HOUS | Dec. 31, 2025 | 268,996 | $2,848,668 | No longer tracked |
| GSBD | March 31, 2026 | 80,000 | $742,400 | 11.0% |
| ADAM | Dec. 31, 2025 | 92,182 | $642,509 | 36.6% |