Pinnbrook Capital Management LP In its 13F for Q1 2026 (holdings as of March 31, 2026, filed May 14, 2026), Pinnbrook Capital Management LP reported 33 stock positions worth $122.4 million . Its top holding was Mastec (MTZ) at 9.5% of the portfolio, followed by Kodiak Gas Services (KGS, 8.3% ) and Curtiss-Wright (CW, 5.6% ). Compared with Q4 2025, it opened 14 new positions, sold out of 65, added to 6 and reduced 13. The biggest buy was a new position in Kodiak Gas Services (KGS) and the biggest sale an exit from iShares 7-10 Year Treasury B (IEF).
Location NEW YORK, NY
CIK 0001856103
Portfolio Value $122.4M (Q1 2026) Holdings 33 stocks · $122.4M 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 MTZ Mastec Inc. 36,187 $11.6M Add +38.2% KGS Kodiak Gas Services Inc. 174,847 $10.2M New CW Curtiss-Wright Corp. 10,059 $6.9M Add +58.9% SLB SLB Ltd. filed as SLB LIMITED 120,801 $6.2M New LRCX Lam Research Corp. 28,100 $6.0M New DVN Devon Energy Corp. 118,292 $6.0M New JBL Jabil Inc. 22,035 $5.9M New MRK Merck & Co. Inc. 46,098 $5.5M Add +98.0% ROST Ross Stores Inc. 23,927 $5.2M Add +6.4% LIN Linde PLC 10,141 $5.0M Reduce -42.5% SPHR Sphere Entertainment Co. 42,810 $5.0M Reduce -14.0% AMAT Applied Materials Inc. 14,700 $5.0M Add +10.5% PR Permian Resources Corp. Class A 194,756 $4.2M New WDC Western Digital Corp. 13,200 $3.6M Reduce -68.1% TJX TJX Companies Inc. filed as TJX COS INC NEW 19,507 $3.1M Reduce -34.2% CSX CSX Corp. 74,800 $3.1M New FTI Technipfmc PLC 44,130 $3.1M Reduce -3.7% BWXT BWX Technologies Inc. 13,200 $2.7M Reduce -21.6% FIVE Five Below 11,290 $2.6M Reduce -49.0% EMBJ Embraer SA-Spon ADR 42,681 $2.5M Add +263.1% FDX FedEx Corp. 6,874 $2.4M New CRS Carpenter Technology 5,500 $2.2M Reduce -83.5% MOD Modine Manufacturing Co. 9,700 $2.1M New NVT Nvent Electric PLC 17,000 $2.0M New WAB Wabtec Corp. 8,036 $2.0M Reduce -77.8% ASML ASML Holding NV-NY Reg SHS filed as ASML HLDG NV 1,120 $1.5M New MATX Matson Inc. 9,000 $1.5M New VIK Viking Holdings Ltd. 15,049 $1.1M Reduce -69.6% STX Seagate Technology Holdings 2,600 $1.0M New GEV GE Vernova Inc. 1,160 $1.0M Reduce -57.8% ATI Ati Inc. 6,900 $1.0M New CIEN Ciena Corp. 2,065 $802K Reduce -89.2% LITE Lumentum Holdings Inc. 723 $508K Reduce -95.7%
Options reported separately and not counted above: BKLN puts ($91.8M), WDC calls ($40.5M), SMH puts ($21.3M), GLW calls ($19.0M), GEV calls ($17.5M), AA calls ($16.6M), BP calls ($14.1M), SLB calls ($13.1M), CIEN calls ($9.5M), DVN calls ($7.0M), LITE calls ($7.0M), CX calls ($4.0M).
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 ▲ IEF iShares 7-10 Year Treasury B Sold out 0.00% −4.81 CHRW C.H. Robinson Worldwide Inc. Sold out 0.00% −3.49 RBC RBC Bearings Inc. Sold out 0.00% −3.06 XLV SS Health Care Select Sector Sold out 0.00% −3.05 AME Ametek Inc. Sold out 0.00% −2.77 CX Cemex Sab-Spons ADR Part Cer Sold out 0.00% −2.76 DHR Danaher Corp. Sold out 0.00% −2.57 CCL Carnival Corp. Sold out 0.00% −2.53 NTRA Natera Inc. Sold out 0.00% −2.48 MKSI MKS Inc. Sold out 0.00% −2.28 MS Morgan Stanley Sold out 0.00% −2.15 RAL Ralliant Corp. Sold out 0.00% −2.04 WWD Woodward Inc. Sold out 0.00% −2.00 RTX RTX Corp. Sold out 0.00% −1.90 CSCO Cisco Systems Inc. Sold out 0.00% −1.82 GOOGL Alphabet Inc. Class A Sold out 0.00% −1.77 PH Parker Hannifin Corp. Sold out 0.00% −1.64 GIL Gildan Activewear Inc. Sold out 0.00% −1.53 HWM Howmet Aerospace Inc. Sold out 0.00% −1.32 CRH CRH PLC Sold out 0.00% −1.32 EAT Brinker International Inc. Sold out 0.00% −1.30 C Citigroup Inc. Sold out 0.00% −1.26 TMO Thermo Fisher Scientific Inc. Sold out 0.00% −1.24 LITE Lumentum Holdings Inc. Reduce -95.7% 0.41% −1.20 SPGI S&P Global Inc. Sold out 0.00% −1.19 MU Micron Technology Inc. Sold out 0.00% −1.17 NVDA Nvidia Corp. Sold out 0.00% −1.05 BA The Boeing Co. Sold out 0.00% −1.03 HAS Hasbro Inc. Sold out 0.00% −1.03 ALSN Allison Transmission Holding Sold out 0.00% −1.01 AER Aercap Holdings NV Sold out 0.00% −0.99 CRS Carpenter Technology Reduce -83.5% 1.77% −0.95 FWONK Liberty Media Corp. Class C Sold out 0.00% −0.93 WBS Webster Financial Corp. Sold out 0.00% −0.88 HUBG Hub Group Inc. Class A Sold out 0.00% −0.88 MDB Mongodb Inc. Sold out 0.00% −0.79 IQV Iqvia Holdings Inc. Sold out 0.00% −0.78 TEVA Teva Pharmaceutical-SP ADR Sold out 0.00% −0.78 SGI Somnigroup International Inc. Sold out 0.00% −0.76 HII Huntington Ingalls Industrie Sold out 0.00% −0.76 SHOP Shopify Inc. Class A Sold out 0.00% −0.73 CLS Celestica Inc. Sold out 0.00% −0.69 FOXA Fox Corp. Class A Sold out 0.00% −0.65 COF Capital One Financial Corp. Sold out 0.00% −0.65 PEP Pepsico Inc. Sold out 0.00% −0.61 KO The Coca-Cola Co. Sold out 0.00% −0.59 SF Stifel Financial Corp. Sold out 0.00% −0.57 AVGO Broadcom Inc. Sold out 0.00% −0.52 BAC Bank of America Corp. Sold out 0.00% −0.52 RDDT Reddit Inc. Class A Sold out 0.00% −0.52
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 ▼ KGS Kodiak Gas Services Inc. New 8.33% +8.33 MTZ Mastec Inc. Add +38.2% 9.51% +8.04 SLB SLB Ltd. New 5.07% +5.07 LRCX Lam Research Corp. New 4.90% +4.90 DVN Devon Energy Corp. New 4.86% +4.86 JBL Jabil Inc. New 4.78% +4.78 CW Curtiss-Wright Corp. Add +58.9% 5.60% +4.69 MRK Merck & Co. Inc. Add +98.0% 4.53% +3.90 PR Permian Resources Corp. Class A New 3.39% +3.39 AMAT Applied Materials Inc. Add +10.5% 4.10% +3.22 ROST Ross Stores Inc. Add +6.4% 4.23% +3.19 CSX CSX Corp. New 2.51% +2.51 FDX FedEx Corp. New 2.00% +2.00 EMBJ Embraer SA-Spon ADR Add +263.1% 2.07% +1.87 MOD Modine Manufacturing Co. New 1.72% +1.72 NVT Nvent Electric PLC New 1.64% +1.64 ASML ASML Holding NV-NY Reg SHS New 1.21% +1.21 MATX Matson Inc. New 1.21% +1.21 STX Seagate Technology Holdings New 0.83% +0.83 ATI Ati Inc. New 0.82% +0.82
Options Activity Q4 2025 → Q1 2026 Security Type Change vs Q4 2025 Underlying Shares Value ▼ TLT iShares 20+ Year Treasury BD put Sold out 1,290,000 $112.4Mbefore exit BKLN Invesco Senior Loan ETF put New 4,500,000 $91.8M WDC Western Digital Corp. call Add +293.7% 149,600 $40.5M AMZN Amazon.com Inc. call Sold out 93,000 $21.5Mbefore exit SMH Vaneck Semiconductor ETF put Reduce -12.2% 55,500 $21.3M TSM Taiwan Semiconductor-SP ADR call Sold out 65,900 $20.0Mbefore exit GLW Corning Inc. call New 140,000 $19.0M EWZ iShares MSCI Brazil ETF call Sold out 592,000 $18.8Mbefore exit GEV GE Vernova Inc. call New 20,000 $17.5M FCX Freeport-McMoran Inc. call Sold out 330,000 $16.8Mbefore exit AA Alcoa Corp. call Reduce -7.4% 250,000 $16.6M NU Nu Holdings Ltd./Cayman Isl-A call Sold out 894,000 $15.0Mbefore exit BP BP PLC-Spons ADR call New 300,000 $14.1M SLB SLB Ltd. call New 255,000 $13.1M MDB Mongodb Inc. call Sold out 30,600 $12.8Mbefore exit CIEN Ciena Corp. call New 24,500 $9.5M EMBJ Embraer SA-Spon ADR call Sold out 146,500 $9.4Mbefore exit NVDA Nvidia Corp. call Sold out 50,000 $9.3Mbefore exit CRWV Coreweave Inc. Class A call Sold out 127,800 $9.2Mbefore exit MU Micron Technology Inc. call Sold out 32,000 $9.1Mbefore exit DVN Devon Energy Corp. call New 140,000 $7.0M LITE Lumentum Holdings Inc. call Reduce -44.4% 10,000 $7.0M TSLA Tesla Inc. call Sold out 13,500 $6.1Mbefore exit PEP Pepsico Inc. call Sold out 35,700 $5.1Mbefore exit HUT Hut 8 Corp. call Sold out 109,500 $5.0Mbefore exit CX Cemex Sab-Spons ADR Part Cer call New 350,000 $4.0M CEG Constellation Energy call Sold out 10,000 $3.5Mbefore exit AAPL Apple Inc. call Sold out 12,500 $3.4Mbefore exit BIDU Baidu Inc. - Spon ADR call Sold out 2,900 $379Kbefore exit
Calls and puts are listed by the shares they cover; their value is not part of the stock holdings above.
All Filings Quarter Positions 13F Reported Value Top Holdings Q2 2026 88 $601.0M CSX, KGS, JBL, NTRA, WAB Q1 2026 33 $122.4M MTZ, KGS, CW, SLB, LRCX Q4 2025 84 $386.8M IEF, CHRW, RBC, XLV, AME Q3 2025 115 $540.5M CHRW, MSFT, META, MLM, SPOT Q2 2025 69 $382.0M ORCL, PRMB, PGR, CW, HAS Q1 2025 37 $154.9M PRMB, WWD, HEI, TDG, WTW Q4 2024 65 $285.0M T, FTI, TRP, PRMB, LYV Q3 2024 64 $331.0M MMM, WAB, CRS, FLUT, MAR Q2 2024 48 $331.3M AMZN, AAPL, TDG, OLED, COHR Q1 2024 78 $578.3M MSFT, NVDA, AMZN, NVT, BLDR