Gulfstream Capital

13F portfolio / Investment manager

Kensico Capital

Michael Lowenstein · Thomas Coleman (presidents)

The firm is based in Greenwich, CT, according to its SEC filings.

Its earliest 13F holdings report on SEC EDGAR was filed in February 2002.

SEC Form ADV lists Michael B. Lowenstein and Thomas J. Coleman as presidents.

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
$5.8B
Positions
25
Est. 1-yearEstimate
-24.8%SPY +15.7%
Est. 3-year, annualizedEstimate
+24.8%SPY +22.8%

As of Jun 30, 2026 · filed Aug 14, 2026

Holdings

7 new · 4 added · 5 trimmed · 9 unchanged · 2 sold out

1APP on Yahoo Finance (opens in a new tab)Applovin CorpCOM CL A28.1%$1.6B3,182,850Trimmed -3.1%$124.97*$267.14+113.8%
2HWM on Yahoo Finance (opens in a new tab)Howmet Aerospace IncCOM23.4%$1.4B5,083,600Unchanged$46.73*$221.21+373.4%
3GOOGL on Yahoo Finance (opens in a new tab)Alphabet IncCAP STK CL A9.3%$539M1,509,500Unchanged$161.31*$341.57+111.7%
4FICO on Yahoo Finance (opens in a new tab)Fair Isaac CorpCOM7.7%$446M373,500Trimmed -3.0%$1138.19*$760.96-33.1%
5V on Yahoo Finance (opens in a new tab)Visa IncCOM CL A5.6%$325M946,600Unchanged$250.92*$400.91+59.8%
6AMZN on Yahoo Finance (opens in a new tab)Amazon Com IncCOM4.0%$233M978,100Trimmed -8.8%$175.27*$249.20+42.2%
7MSFT on Yahoo Finance (opens in a new tab)Microsoft CorpCOM2.6%$150M403,400Unchanged$334.27*$526.88+57.6%
8PGR on Yahoo Finance (opens in a new tab)Progressive CorpCOM1.9%$109M498,500Unchanged$145.05*$216.20+49.1%
9HLT on Yahoo Finance (opens in a new tab)Hilton Worldwide Hldgs IncCOM1.8%$107M322,500Unchanged$237.36$344.92+45.3%
10ICE on Yahoo Finance (opens in a new tab)Intercontinental Exchange InCOM1.8%$106M857,700Added +19.7%$115.77*$159.40+37.7%
11BKNG on Yahoo Finance (opens in a new tab)Booking Holdings IncCOM1.8%$103M576,500Added +2847.3%$170.31$163.09-4.2%
12LNG on Yahoo Finance (opens in a new tab)Cheniere Energy IncCOM NEW1.7%$102M424,900Unchanged$158.64*$286.35+80.5%
13TW on Yahoo Finance (opens in a new tab)Tradeweb Mkts IncCL A1.7%$100M1,004,700Unchanged$119.37$112.82-5.5%
14TSM on Yahoo Finance (opens in a new tab)Taiwan Semiconductor ManufacSPONSORED ADS1.5%$86M179,500New$403.98$413.04+2.2%
15INTC on Yahoo Finance (opens in a new tab)Intel CorpCOM1.3%$79M563,200Added +16.1%$53.51$90.88+69.8%
16MCK on Yahoo Finance (opens in a new tab)McKesson CorpCOM1.3%$75M99,680New$791.41$1001.86+26.6%
17TOST on Yahoo Finance (opens in a new tab)Toast IncCL A0.8%$46M1,659,800New$26.08$31.39+20.4%
18MORN on Yahoo Finance (opens in a new tab)Morningstar IncCOM0.8%$44M284,100Added +110.4%$178.21$205.76+15.5%
19SPGI on Yahoo Finance (opens in a new tab)S&P Global IncCOM0.8%$44M107,700Trimmed -5.1%$448.16$426.66-4.8%
20SE on Yahoo Finance (opens in a new tab)Sea LtdSPONSORD ADS0.7%$39M408,700Trimmed -46.8%$110.03$94.44-14.2%
21ICLR on Yahoo Finance (opens in a new tab)ICON Pub Ltd CoSHS0.6%$33M188,000New$127.30$170.14+33.7%
22IQV on Yahoo Finance (opens in a new tab)IQVIA Hldgs IncCOM0.5%$32M165,000New$174.38$264.14+51.5%
23VSEC on Yahoo Finance (opens in a new tab)Vse CorpCOM0.5%$27M119,600New$191.90$158.08-17.6%
24NPWR/WS on Yahoo Finance (opens in a new tab)Net Power Inc*W EXP 06/08/20280.0%$132K453,800Unchanged———
25DPC on Yahoo Finance (opens in a new tab)DPC Holdings PLCORDINARY SHARES0.0%$47K965New$48.71$30.68-37.0%

Sold out since Q1 2026

Estimated, from reported holdings

Quarter by quarter

Q4 2023: est. holdings +18.2%Q4 2023: S&P 500 (SPY) +11.6%Q4 ’23Q1 2024: est. holdings +14.2%Q1 2024: S&P 500 (SPY) +10.4%Q1 ’24Q2 2024: est. holdings +2.9%Q2 2024: S&P 500 (SPY) +4.4%Q2 ’24Q3 2024: est. holdings +15.4%Q3 2024: S&P 500 (SPY) +5.8%Q3 ’24Q4 2024: est. holdings +17.8%Q4 2024: S&P 500 (SPY) +2.5%Q4 ’24Q1 2025: est. holdings -2.3%Q1 2025: S&P 500 (SPY) -4.3%Q1 ’25Q2 2025: est. holdings +15.4%Q2 2025: S&P 500 (SPY) +10.8%Q2 ’25Q3 2025: est. holdings +21.5%Q3 2025: S&P 500 (SPY) +8.1%Q3 ’25Q4 2025: est. holdings -2.4%Q4 2025: S&P 500 (SPY) +2.7%Q4 ’25Q1 2026: est. holdings -19.8%Q1 2026: S&P 500 (SPY) -4.4%Q1 ’26Q2 2026: est. holdings +17.3%Q2 2026: S&P 500 (SPY) +15.1%Q2 ’26Q3 2026: est. holdings -18.2%Q3 2026: S&P 500 (SPY) +2.4%Q3 ’26
Estimated holdings return S&P 500 (SPY), by quarter

High-conviction buys (new positions at 3% or more of the portfolio) since Q3 2023: 0. Of 0 with six months of history, — beat the S&P 500 from the filing date.

Source: SEC Form 13F-HR 0001193125-26-352121, compared with the Q1 2026 report. 0 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.