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One William Street Capital Management, L.P.

Institutional InvestorSimilar funds →SEC EDGAR: CIK 1534300
Institutional-grade research for retail investors

Sector Allocation

  • Financials44.1%$18.6M
  • Real Estate41.9%$17.7M
  • Other14.0%$5.9M
  • Energy0.0%$15,455

AUM History

13fpro.ai/research/fund/one-william-street-capital-management-l-p-1534300

Conviction and streaks

Diversifying · top 10 = 98.5%

From the fund's last 12 quarters of 13F filings: positions held longest at size, and names it added to or trimmed several quarters running.

TRTX$TRTXConviction hold21.2% weight · held 4 quartersFLG$FLGConviction hold5.5% weight · held 4 quartersNFE$NFEConviction hold0.0% weight · held 8 quartersIVZ$IVZAccumulating+81% shares · 3 quarters running

Largest positions — Q2 2026

Top 20 stock positions. Options are left out: 13F reports them at the underlying's value.

13fpro.ai/research/fund/one-william-street-capital-management-l-p-1534300

One William Street Capital Management, L.P. 13F holdings — Q2 2026

$242.5M portfolio (-79.4% QoQ) · 15 holdings · Q2 2026 13F · top 10 are 99% of the stock portfolio

Includes $200.2M of put/call options ($128.2M puts, $72.0M calls), which 13F rules report at the value of the underlying shares, not the premium at risk. Stocks alone: $42.3M. Weights use the stock portfolio.

All holdings — One William Street Capital Management, L.P. (Q2 2026)

15 disclosed positions from the Form 13F-HR on SEC EDGAR, with quarter-over-quarter share changes. Largest by value first; the ten above are not repeated.

Company
— PUTISHARES TR - IBOXX HI YD ETF$120.0M-88%
— CALLISHARES TR - IBOXX HI YD ETF$72.0M+80%
— PUTISHARES TR - RUSSELL 2000 ETF$8.3M-35%
RKT$RKTRocket Companies, Inc.$603K-76%
NFE$NFENew Fortress Energy Inc.$15K—

What changed in Q2 2026

Against the previous quarter's 13F: 2 new, 2 added to, 5 trimmed, 3 sold out. Share-count changes; largest moves by dollar size first.

New positions (2)

  • KREF$KREFKKR Real Estate Finance Trust Inc.$1.4M

    first bought this quarter

  • SVC$SVCService Properties Trust$1.1M

    first bought this quarter

Added to (2)

  • CALLISHARES TR - IBOXX HI YD ETF+80%

    now $72.0M

  • IVZ$IVZInvesco Ltd.+6%

    now $15.7M · held 3 qtrs, 3 adds in a row

Trimmed (5)

  • PUTISHARES TR - IBOXX HI YD ETF-88%

    now $120.0M

  • CUZ$CUZCOUSINS PROPERTIES INC-90%

    now $617K · held 2 qtrs

  • PUTISHARES TR - RUSSELL 2000 ETF-35%

    now $8.3M

  • FLG$FLGFLAGSTAR BANK, NATIONAL ASSOCIATION-61%

    now $2.3M · held 4 qtrs

  • RKT$RKTRocket Companies, Inc.-76%

    now $603K · held 2 qtrs

Sold out (3)

  • IVZ$IVZCALLInvesco Ltd.was $40.8M
  • SPY$SPYPUTSPDR S&P 500 ETF TRUSTwas $16.3M
  • SPY$SPYSPDR S&P 500 ETF TRUSTwas $4.9M

    held 1 qtr

Firm AUM (Form ADV): $11.3B as of 2025-12-31 · SEC IAPD

Share

Holdings by quarter

Every 13F One William Street Capital Management, L.P. has filed, 22 earlier quarters. Pick one to see what it held then.

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Q2 2026 13F filed with the SEC on Aug 14, 2026. Prices are closing prices as of Oct 26, 2026.

Average quality of One William Street Capital Management, L.P.'s top 20 holdings: 51/100 (our AI quality score, weighted by position size; 10 of the 20 are scored)

Top 10 since filing

-17.0%

Value-weighted move of the 10 largest stock positions

Turnover

7%

Last quarter; 102% over the last 4

Top 10 weight

99%

Share of the stock portfolio in its 10 largest positions

Held 4+ quarters

31%

Share of portfolio value in positions held a year or more

Highest-quality names it owns(among its 100 largest positions)

The 8 highest-scoring companies in this portfolio are a Pro feature.

How these are measured
  • Moves since the quarter-end and since the filing date use our own daily closing prices, from the close on (or just before) each date to the latest close.
  • Turnover is the lesser of shares bought or sold in a quarter, valued at the quarter-end prices in the 13F, divided by the average of the two quarters' stock portfolio values.
  • Quarters held and add/trim streaks count back only through quarters whose filed holdings add up to the filing's own cover-page total (back to Q3 2024 for this fund). A change counts as an add or a trim when the split-adjusted share count moves by more than 1%.
  • Estimate, not the fund's reported cost. For each quarter in the current holding period in which the fund's share count rose (split-adjusted), we take that quarter's average daily close and weight it by the shares added; sales do not change an average cost. Quarters where the stock's price history and the 13F's own implied price disagree by more than 2x are left out.
  • Put and call option rows report the value of the underlying shares, not a position the fund paid for, so they are left out of all of the above.

Portfolio Overview

One William Street Capital Management, L.P. disclosed 15 positions worth $242.5M in its Form 13F-HR for Q2 2026 — $42.3M in common stock plus $200.2M of put/call option positions (reported at underlying notional value, not premium at risk), led by $IVZ (Invesco Ltd.) at 37.1% of the equity portfolio, followed by $TRTX. During the quarter the fund opened 2 new positions and exited 3 — including a new stake in $KREF and a full exit from $IVZ. The portfolio is most concentrated in Financials (44.1% of disclosed assets). All figures are sourced directly from One William Street Capital Management, L.P.’s Form 13F-HR filing with the SEC under CIK 1534300.

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AI-Powered Hedge Fund Analysis: One William Street Capital Management, L.P.

13F Pro is an AI hedge fund tracker and stock research platform. For One William Street Capital Management, L.P. (SEC CIK: 1534300), the platform ingests every quarterly Form 13F filing and applies AI-powered analysis on top — 10 specialized AI analysts (value, growth, momentum, macro, activist, and more) debate the fund's top positions and publish AI-generated analysis with cited SEC sources.

Every holding in One William Street Capital Management, L.P.'s portfolio is scored on an AI quality ranking built from its SEC filings (ROIC, FCF margin, revenue growth, institutional flow, earnings quality, shareholder dilution, and more). Track accumulation and distribution quarter over quarter, identify conviction positions, and see AI stock analysis for each position — alongside 8,700+ other institutional filers and 2,800+ AI-ranked companies.