One William Street Capital Management, L.P.
Institutional manager — quarterly 13F holdings, Q ending 2026-03-31
Reported value
$1.18B
Q ending 2026-03-31
Prior quarter
$745.4M
Q ending 2025-12-31
Change
+58.2% QoQ · +3422.7% YoY
Positions
16
reported holdings
Largest positions
All 16 reported positions, Q ending 2026-03-31. A manager can hold shares, calls and puts on the same security at once — such positions are listed as separate rows. Type: Shares = common stock, Put/Call = option positions (valued at the underlying), Principal = debt. Tickers link to stock pages where covered.
| Holding | Ticker | Type | Value ▼ | Shares |
|---|---|---|---|---|
| Ishares Tr | HYG | Put | $1.02B | 12.8M |
| Invesco Exch Traded Fd Tr Ii | BKLN | Call | $40.8M | 2.0M |
| Ishares Tr | HYG | Call | $39.8M | 500K |
| State Str Spdr S&P 500 Etf T | SPY | Put | $16.3M | 25K |
| Invesco Exch Traded Fd Tr Ii | BKLN | Shares | $14.8M | 725K |
| Ishares Tr | IWM | Put | $10.5M | 43K |
| Tpg Re Fin Tr Inc | TRTX | Shares | $8.4M | 1.1M |
| Vanguard Scottsdale Fds | VCIT | Shares | $5.9M | 72K |
| Flagstar Bank National Assoc | FLG | Shares | $5.3M | 400K |
| State Str Spdr S&P 500 Etf T | SPY | Shares | $4.9M | 8K |
| Cousins Pptys Inc | CUZ | Shares | $4.5M | 201K |
| Rocket Cos Inc | RKT | Shares | $2.3M | 158K |
| Apollo Coml Real Estate Fin | ARI | Shares | $2.1M | 200K |
| Starwood Ppty Tr Inc | STWD | Shares | $2.0M | 114K |
| Blackstone Mortgage Trust In | BXMT | Shares | $1.9M | 100K |
| New Fortress Energy Inc | NFE | Shares | $25K | 43K |
Values as reported in public regulatory filings (USD); holdings are reported quarterly, up to 45 days after quarter end, and may contain reporting errors. Nothing here is investment advice.