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.

Filer Information
Address
299 PARK AVENUE
25TH FLOOR
NEW YORK, NY 10171
Phone
(212) 957-2500
Filing Manager
One William Street Capital Management, L.P.
New York, NY
Signatory
Arthur Damoulakis
Authorized Signatory
Loading holdings…
AUM

$242.5M

Long-equity book

Holdings

15

Distinct positions

Period

2026-06-30

Filed 2026-08-14

Q/Q Activity

+2 / −1 / ↑2 / ↓5

vs 2026-03-31

Firm Profile & Key People
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%
Show all 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%
Show all 5 →

New Positions

  • KKR REAL ESTATE FIN TR INC$1.4M
  • SERVICE PPTYS TR$1.1M
Show all 2 →

Exited Positions

  • STATE STR SPDR S&P 500 ETF T$4.9M
Show all 1 →
All Holdings

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
Filing History
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