13F portfolio / Investment manager
Pentwater Capital
Matthew Halbower (CEO)
The firm is based in Naples, FL, according to its SEC filings.
Its earliest 13F holdings report on SEC EDGAR was filed in February 2008.
SEC Form ADV lists Matthew C. Halbower as chief executive officer.
The 13F shows long US-listed stock and option positions only. It leaves out short positions, cash, bonds and most non-US holdings.
- Reported 13F value
- $12.5B
- Positions
- 59
- Est. 1-yearEstimate
- —SPY +15.7%
- Est. 3-year, annualizedEstimate
- —SPY +22.8%
As of Jun 30, 2026 · filed Aug 14, 2026
Holdings
29 new · 10 added · 14 trimmed · 6 unchanged · 30 sold out
| 1 | — | Electronic Arts IncCOM | 22.1% | $2.8B | 13,475,000 | Added +5.2% | — | — | — |
| 2 | BA on Yahoo Finance (opens in a new tab) | Boeing CoCOM | 10.7% | $1.3B | 6,200,000 | Trimmed -12.3% | $204.54* | $187.86 | -8.2% |
| 3 | WBD on Yahoo Finance (opens in a new tab) | Warner Bros Discovery IncCOM SER A | 10.1% | $1.3B | 47,576,000 | Trimmed -5.3% | — | $30.95 | — |
| 4 | KVUE on Yahoo Finance (opens in a new tab) | Kenvue IncCOM | 7.8% | $977M | 51,130,000 | Trimmed -1.7% | $16.90 | $18.75 | +11.0% |
| 5 | NSC on Yahoo Finance (opens in a new tab) | Norfolk Southn CorpCOM | 7.0% | $873M | 2,775,000 | Trimmed -13.8% | $274.95 | $323.96 | +17.8% |
| 6 | ROKU on Yahoo Finance (opens in a new tab) | Roku IncCOM CL A | 4.8% | $597M | 4,325,000 | New | $121.99 | $154.29 | +26.5% |
| 7 | ECHO on Yahoo Finance (opens in a new tab) | Echostar CorpCL A | 3.1% | $392M | 3,860,000 | Added +63.6% | $105.53 | $85.36 | -19.1% |
| 8 | CAR on Yahoo Finance (opens in a new tab) | Avis Budget Group IncCOM | 3.0% | $372M | 2,513,300 | Trimmed -64.3% | $111.76 | $106.37 | -4.8% |
| 9 | TXNM on Yahoo Finance (opens in a new tab) | Txnm Energy IncCOM | 2.9% | $368M | 6,487,500 | Added +131.7% | $56.94 | $58.58 | +2.9% |
| 10 | TECK on Yahoo Finance (opens in a new tab) | Teck Resources LtdCL B | 2.8% | $354M | 5,960,000 | Trimmed -14.4% | $40.92* | $64.62 | +57.9% |
| 11 | CZR on Yahoo Finance (opens in a new tab) | Caesars Entertainment Inc NeCOM | 2.8% | $346M | 11,465,000 | Added +332.6% | $27.17 | $28.76 | +5.9% |
| 12 | GEO on Yahoo Finance (opens in a new tab) | Geo Group IncCOM | 2.5% | $313M | 10,582,000 | Added +10.6% | $21.52 | $28.65 | +33.2% |
| 13 | OGN on Yahoo Finance (opens in a new tab) | Organon & CoCOMMON STOCK | 2.0% | $245M | 18,100,000 | New | $11.93 | $13.77 | +15.4% |
| 14 | D on Yahoo Finance (opens in a new tab) | Dominion Energy IncCOM | 1.9% | $239M | 3,500,000 | New | $63.97 | $63.69 | -0.4% |
| 15 | — | Digitalbridge Group IncCL A NEW | 1.6% | $199M | 12,600,000 | Added +7.2% | — | — | — |
| 16 | SGRY on Yahoo Finance (opens in a new tab) | Surgery Partners IncCOM | 1.6% | $195M | 11,630,000 | Trimmed -8.1% | $20.94 | $14.59 | -30.3% |
| 17 | — | Apogee Therapeutics IncCOM | 1.5% | $189M | 1,425,000 | New | — | — | — |
| 18 | CCL on Yahoo Finance (opens in a new tab) | Carnival Corp LtdCOMMON SHARES | 1.3% | $163M | 5,705,000 | New | $27.09 | $25.96 | -4.2% |
| 19 | SLAB on Yahoo Finance (opens in a new tab) | Silicon Laboratories IncCOM | 1.3% | $162M | 741,725 | Added +48.3% | $194.09 | $220.85 | +13.8% |
| 20 | — | Nuvalent IncCOM | 1.2% | $145M | 1,175,000 | New | — | — | — |
| 21 | THC on Yahoo Finance (opens in a new tab) | Tenet Healthcare CorpCOM NEW | 1.1% | $143M | 765,000 | Added +512.0% | $188.23 | $267.14 | +41.9% |
| 22 | SKYD on Yahoo Finance (opens in a new tab) | Paramount Skydance CorpCOM CL B | 0.9% | $118M | 12,000,000 | Added +192.7% | $11.79 | $6.86 | -41.8% |
| 23 | GSAT on Yahoo Finance (opens in a new tab) | Globalstar IncCOM NEW | 0.9% | $110M | 1,355,000 | New | $80.48 | $82.26 | +2.2% |
| 24 | ACA on Yahoo Finance (opens in a new tab) | Arcosa IncCOM | 0.8% | $96M | 660,000 | New | $124.11 | $146.90 | +18.4% |
| 25 | — | Liberty Broadband CorpCOM SER C | 0.7% | $83M | 2,493,644 | Unchanged | — | — | — |
| 26 | PAYO on Yahoo Finance (opens in a new tab) | Payoneer Global IncCOM | 0.6% | $70M | 9,888,410 | New | $5.47 | $7.14 | +30.5% |
| 27 | — | Skywater Technology IncCOM | 0.5% | $63M | 1,807,000 | New | — | — | — |
| 28 | HCA on Yahoo Finance (opens in a new tab) | HCA Healthcare IncCOM | 0.4% | $51M | 130,000 | Added +73.3% | $467.19 | $459.18 | -1.7% |
| 29 | SPCX on Yahoo Finance (opens in a new tab) | Space Exploration Techn CorpCLASS A COM STK | 0.3% | $39M | 230,000 | New | $170.68 | $144.89 | -15.1% |
| 30 | TECH on Yahoo Finance (opens in a new tab) | Bio-Techne CorpCOM | 0.3% | $35M | 500,000 | New | $53.89 | $72.49 | +34.5% |
| 31 | SPY on Yahoo Finance (opens in a new tab) | State Str SPDR S&P 500 ETF TTR UNIT | 0.2% | $30M | 40,000 | Trimmed -93.1% | $672.74* | $762.97 | +13.4% |
| 32 | AXTA on Yahoo Finance (opens in a new tab) | Axalta Coating Sys LtdCOM | 0.2% | $26M | 756,762 | New | $30.08 | $33.53 | +11.5% |
| 33 | MU on Yahoo Finance (opens in a new tab) | Micron Technology IncCOM | 0.2% | $21M | 18,000 | New | $749.66 | $893.53 | +19.2% |
| 34 | — | Avanos Med IncCOM | 0.1% | $19M | 750,000 | New | — | — | — |
| 35 | CORZ on Yahoo Finance (opens in a new tab) | Core Scientific Inc NewCOM | 0.1% | $14M | 536,594 | Trimmed -97.8% | $14.47 | $13.52 | -6.6% |
| 36 | ORCL on Yahoo Finance (opens in a new tab) | Oracle CorpCOM | 0.1% | $13M | 90,000 | Trimmed -41.9% | $160.79 | $128.49 | -20.1% |
| 37 | SIND on Yahoo Finance (opens in a new tab) | Sinda LtdCOMMON STOCK | 0.1% | $10M | 800,000 | New | $12.00 | $11.97 | -0.3% |
| 38 | HUM on Yahoo Finance (opens in a new tab) | Humana IncCOM | 0.1% | $8M | 19,000 | New | $284.09 | $417.60 | +47.0% |
| 39 | UNH on Yahoo Finance (opens in a new tab) | Unitedhealth Group IncCOM | 0.1% | $7M | 17,758 | Trimmed -96.5% | $336.43 | $401.73 | +19.4% |
| 40 | AES on Yahoo Finance (opens in a new tab) | AES CorpCOM | 0.1% | $7M | 500,000 | Unchanged | $14.48 | $14.94 | +3.2% |
| 41 | TMCR on Yahoo Finance (opens in a new tab) | Metals Rty Co IncCOM SHS | 0.1% | $7M | 919,230 | New | $12.56 | $2.00 | -84.1% |
| 42 | KWEB on Yahoo Finance (opens in a new tab) | Kraneshares TrustCSI CHI INTERNET | 0.0% | $6M | 250,000 | Unchanged | $32.76 | $24.44 | -25.4% |
| 43 | SSMR on Yahoo Finance (opens in a new tab) | Sunshine Silver Mng & RefngCOMMON STOCK | 0.0% | $6M | 439,400 | New | $14.14 | $11.69 | -17.3% |
| 44 | WGS on Yahoo Finance (opens in a new tab) | Genedx Holdings CorpCOM CL A | 0.0% | $6M | 82,500 | New | $56.83 | $64.54 | +13.6% |
| 45 | — | Liberty Broadband CorpCOM SER A | 0.0% | $6M | 170,000 | Unchanged | — | — | — |
| 46 | AMC on Yahoo Finance (opens in a new tab) | Amc Entmt Hldgs IncCL A NEW | 0.0% | $4M | 2,250,000 | Trimmed -76.0% | $1.29 | $2.86 | +122.2% |
| 47 | FPS on Yahoo Finance (opens in a new tab) | Forgent Power Solutions IncCOM SHS CL A | 0.0% | $4M | 65,000 | Trimmed -59.4% | $33.28 | $31.83 | -4.4% |
| 48 | DCH on Yahoo Finance (opens in a new tab) | Dauch CorpCOM | 0.0% | $3M | 519,790 | Unchanged | $6.95 | $4.93 | -29.0% |
| 49 | SYNA on Yahoo Finance (opens in a new tab) | Synaptics IncCOM | 0.0% | $2M | 20,000 | New | $112.90 | $117.00 | +3.6% |
| 50 | SPTX on Yahoo Finance (opens in a new tab) | Seaport Therapeutics IncCOMMON STOCK | 0.0% | $2M | 83,000 | New | $17.59 | $17.70 | +0.6% |
| 51 | CEG on Yahoo Finance (opens in a new tab) | Constellation Energy CorpCOM | 0.0% | $2M | 7,000 | New | $280.96 | $271.45 | -3.4% |
| 52 | CXW on Yahoo Finance (opens in a new tab) | Corecivic IncCOM | 0.0% | $2M | 50,000 | Unchanged | $18.86 | $30.57 | +62.1% |
| 53 | KRMN on Yahoo Finance (opens in a new tab) | Karman Hldgs IncCOMMON STOCK | 0.0% | $1M | 25,000 | New | $64.65 | $35.41 | -45.2% |
| 54 | MDLN on Yahoo Finance (opens in a new tab) | Medline IncCOM CL A | 0.0% | $1M | 30,000 | Trimmed -40.0% | $44.15 | $36.44 | -17.5% |
| 55 | CBRS on Yahoo Finance (opens in a new tab) | Cerebras Systems IncCOM CL A | 0.0% | $1M | 5,000 | New | $235.36 | $128.53 | -45.4% |
| 56 | NYXH on Yahoo Finance (opens in a new tab) | Nyxoah S ASHS | 0.0% | $1M | 600,000 | New | $2.64 | $1.12 | -57.7% |
| 57 | EROC on Yahoo Finance (opens in a new tab) | Erock IncCL A COM | 0.0% | $870K | 60,000 | New | $15.92 | $9.46 | -40.6% |
| 58 | — | Taylor Morrison Home CorpCOM | 0.0% | $359K | 5,000 | New | — | — | — |
| 59 | AAUC on Yahoo Finance (opens in a new tab) | Allied Gold CorpCOM NEW | 0.0% | $237K | 10,000 | New | $28.26 | $20.94 | -25.9% |
Sold out since Q1 2026
- —Masimo Corp$565M at Q1 2026
- —Hologic Inc$340M at Q1 2026
- —Arcellx Inc$330M at Q1 2026
- —Centessa Pharmaceuticals PLC$325M at Q1 2026
- NFLX on Yahoo Finance (opens in a new tab)Netflix Inc.$297M at Q1 2026
- —Clearwater Analytics Hldgs I$269M at Q1 2026
- —Apellis Pharmaceuticals Inc$211M at Q1 2026
- —Amicus Therapeutic$202M at Q1 2026
- —Carnival Corp$157M at Q1 2026
- —Air Lease Corp$156M at Q1 2026
- —Webster Finl Corp$130M at Q1 2026
- UAL on Yahoo Finance (opens in a new tab)United Airls Hldgs Inc$46M at Q1 2026
- —Onestream Inc$45M at Q1 2026
- QQQ on Yahoo Finance (opens in a new tab)Invesco Qqq Tr$35M at Q1 2026
- PNFP on Yahoo Finance (opens in a new tab)Pinnacle Finl Partners Inc$26M at Q1 2026
- —Day One Biopharmaceuticals I$17M at Q1 2026
- GPCR on Yahoo Finance (opens in a new tab)Structure Therapeutics Inc$12M at Q1 2026
- RNA on Yahoo Finance (opens in a new tab)Atrium Therapeutics Inc$8M at Q1 2026
- UPS on Yahoo Finance (opens in a new tab)United Parcel Svcs Inc$4M at Q1 2026
- —Cantaloupe Inc$2M at Q1 2026
- PRTCY on Yahoo Finance (opens in a new tab)Puretech Health PLC$1M at Q1 2026
- BATRK on Yahoo Finance (opens in a new tab)Atlanta Braves Hldgs Inc$854K at Q1 2026
- XOVR on Yahoo Finance (opens in a new tab)Entrepreneurshares Series Tr$777K at Q1 2026
- CRWV on Yahoo Finance (opens in a new tab)Coreweave Inc$736K at Q1 2026
- FRMI on Yahoo Finance (opens in a new tab)Fermi Inc$730K at Q1 2026
- RDDT on Yahoo Finance (opens in a new tab)Reddit Inc$673K at Q1 2026
- GLXY on Yahoo Finance (opens in a new tab)Galaxy Digital Inc.$369K at Q1 2026
- KTOS on Yahoo Finance (opens in a new tab)Kratos Defense & Sec Solutio$353K at Q1 2026
- CIFR on Yahoo Finance (opens in a new tab)Cipher Digital Inc$193K at Q1 2026
- WYFI on Yahoo Finance (opens in a new tab)Whitefiber Inc$119K at Q1 2026
Estimated, from reported holdings
Quarter by quarter
High-conviction buys (new positions at 3% or more of the portfolio) since Q3 2023: 24. Of 3 with six months of history, 66.7% beat the S&P 500 from the filing date.
Source: SEC Form 13F-HR 0001140361-26-033162, compared with the Q1 2026 report. 31 option rows are excluded from weights. Tickers map from CUSIP via OpenFIGI. Estimated returns weight each position’s next-quarter total return (Yahoo Finance adjusted closes) by its quarter-end value and assume no trades. Estimated cost averages daily adjusted closes in each quarter the share count rose, from Q3 2023 onward (* = held at the start of our data). Price is the latest close.
Important information
Form 13F data is delayed. Managers have up to 45 days after each calendar quarter to file, so holdings shown may have changed materially since the report date. 13F reports cover long positions in US-listed equities and certain other securities only; they exclude short positions, most non-US holdings, cash, bonds and private investments, and managers may request confidential treatment for some positions. Options rows are listed in filings but are not counted in the holdings and weights shown here.
Estimated holdings returns, estimated cost and high-conviction results are hypothetical calculations from quarter-end holdings and public prices, assuming no trades between reports. They are not the actual returns or costs of any fund or manager and do not reflect fees, trading, leverage, shorts or cash. Biographies are drawn from cited public sources. This page is for information only and is not individualized investment advice or a recommendation to buy or sell any security. Gulfstream Capital and its clients may hold positions in securities shown.