King Street Capital Management, L.P. In its 13F for Q1 2026 (holdings as of March 31, 2026, filed May 15, 2026), King Street Capital Management, L.P. reported 11 stock positions worth $328.0 million . Its top holding was Surgery Partners (SGRY) at 37.2% of the portfolio, followed by Boeing (BA, 15.7% ) and Blackstone Secured Lending F (BXSL, 9.0% ). Compared with Q4 2025, it opened 5 new positions, sold out of 4, added to 1 and reduced 2. The biggest buy was a new position in Blackstone Secured Lending F (BXSL) and the biggest sale Boeing (BA, shares −61% ).
Location New York, NY
CIK 0001218199
Portfolio Value $328.0M (Q1 2026) Holdings 11 stocks · $328.0M Holdings quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock % Of Portfolio ▼ Shares Held Total Value Change vs Q4 2025 SGRY Surgery Partners Inc. 37.17% 10,229,730 $121.9M No change BA The Boeing Co. 15.68% 258,355 $51.4M Reduce -61.1% BXSL Blackstone Secured Lending F 9.03% 1,250,000 $29.6M New UWMC Uwm Holdings Corp. 8.61% 7,799,000 $28.2M Add +69.8% UNIT Uniti Group Inc. 7.14% 2,498,226 $23.4M No change XLI SS Industrial Select Sector 5.75% 116,660 $18.9M New TLN Talen Energy Corp. 4.57% 47,000 $15.0M New VG Venture Global Inc. Class A 4.28% 890,000 $14.0M New OPTU Optimum Communications Inc. Class A 3.18% 8,032,126 $10.4M No change VST Vistra Corp. 2.70% 59,000 $8.9M New AGNC AGNC Investment Corp. 1.88% 615,000 $6.2M Reduce -81.1%
Portfolio Sells Q4 2025 → Q1 2026 Portfolio Sells quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q4 2025 % Of Portfolio Change To Portfolio ▲ BA The Boeing Co. Reduce -61.1% 15.68% −13.60 LPLA LPL Financial Holdings Inc. Sold out 0.00% −7.54 NLY Annaly Capital Management Inc. Sold out 0.00% −6.48 AGNC AGNC Investment Corp. Reduce -81.1% 1.88% −5.20 ALLY Ally Financial Inc. Sold out 0.00% −4.03 RH RH Sold out 0.00% −3.17
Portfolio Buys Q4 2025 → Q1 2026 Portfolio Buys quarter Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024
Stock Change vs Q4 2025 % Of Portfolio Change To Portfolio ▼ BXSL Blackstone Secured Lending F New 9.03% +9.03 XLI SS Industrial Select Sector New 5.75% +5.75 TLN Talen Energy Corp. New 4.57% +4.57 UWMC Uwm Holdings Corp. Add +69.8% 8.61% +4.52 VG Venture Global Inc. Class A New 4.28% +4.28 VST Vistra Corp. New 2.70% +2.70
Notes & Other Activity Q4 2025 → Q1 2026 Bonds, preferreds, convertibles and warrants; not part of the stock holdings or percentages above.
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2026 6 $189.7M SGRY, USHY, HYG, TLN, VST Q1 2026 11 $328.0M SGRY, BA, BXSL, UWMC, UNIT Q4 2025 10 $492.4M SGRY, BA, LPLA, AGNC, NLY Q3 2025 13 $499.9M SGRY, BA, UNIT, SLG, KRE Q2 2025 7 $370.7M BA, SGRY, UNIT, AVAH, HOUS Q1 2025 8 $369.9M BA, SGRY, AVAH, UNIT, PCG Q4 2024 8 $242.9M BA, SGRY, AVAH, BLCO, PCG Q3 2024 Amended 7 $113.0M SGRY, AVAH, BLCO, UNIT, OPTU Q2 2024 Amended 3 $37.6M AVAH, AMBP, OPTU Q1 2024 3 $46.7M AVB, AVAH, VMRK