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Disclosery

One William Street Capital Management, L.P.

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13F filer, CIK 1534300, New York, NY

One William Street Capital Management, L.P. reported $745,436,977 across 8 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-02-17.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001172661-26-000841

Period
2025-12-31
Reported value
$745M
Holdings
8
Top 10 weight
100%
New
4
Sold out
3

Largest buys vs the previous quarter

SecurityShares changeApprox. value
RSPnew+150,000$28.7M
HYGnew+50,000$4.03M
FLGadded+195,000$2.46M
GSBDnew+80,000$742K
TRTXadded+56,291$485K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
VCITexited-71,700-$6.03M
HOUSexited-268,996-$2.85M
ADAMexited-92,182-$643K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2025

Share positions as resolved from 13F-HR 0001172661-26-000841, largest first. % of portfolio is the value over $42,699,057, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
RSPINVESCO EXCHANGE TRADED FD TQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 150,000 shares 150,000$28.7M67.29%newTimeline
FLGFLAGSTAR BANK NATIONAL ASSOCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 205,000 shares; 2025Q4: 400,000 shares 400,000$5.04M11.79%+195,000Timeline
TRTXTPG RE FIN TR INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 420,670 shares; 2025Q4: 476,961 shares 476,961$4.11M9.62%+56,291Timeline
HYGISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 250,000 shares; 2025Q3: not reported; 2025Q4: 50,000 shares 50,000$4.03M9.44%newTimeline
GSBDGOLDMAN SACHS BDC INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: 80,000 shares 80,000$742K1.74%newTimeline
NFENEW FORTRESS ENERGY INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 50,000 shares; 2024Q4: 50,000 shares; 2025Q1: 50,000 shares; 2025Q2: 50,000 shares; 2025Q3: 42,564 shares; 2025Q4: 42,564 shares 42,564$48.5K0.11%0Timeline

Options

Puts and calls, as filed. The amount and value describe the underlying shares, not the option premium, so they stay out of % of portfolio (H5).

SecurityTypeAmountValueChange
HYGISHARES TR IBOXX HI YD ETFput8,624,000$695M+5,274,000
IWMISHARES TR SHSput30,000$7.38Mnew

Sold out in Q4 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
VCITVANGUARD SCOTTSDALE FDS71,700$6.03Mshares
HOUSANYWHERE REAL ESTATE INC268,996$2.85Mshares
ADAMADAMAS TRUST INC.92,182$643Kshares

How Q4 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001172661-26-000841 base2026-02-17acceptance time not in the bulk data set