Owning promising growth stocks over the long term is a surefire way for you to build your wealth towards a happy retirement.
There is a plethora of investment choices in the US market where you can find many growth stocks in various sectors.
To build a sturdy growth stock portfolio, you should select companies that possess a robust economic moat and boast strong growth track records.
Here are four US stocks you can consider owning for the long term.
Palo Alto Networks (NASDAQ: PANW)
Palo Alto Networks, or PAN, provides comprehensive AI-powered security solutions across network, cloud, and security operations.
The company reported a strong set of earnings for its fiscal 2025 (FY2025) ending 31 July 2025.
Revenue rose 15% year on year to US$9.2 billion, while operating profit shot up 81.7% year on year to US$1.2 billion.
Net profit was affected by a tax credit in the previous fiscal year, which distorted the net profit for that year.
Hence, we looked at profit before tax, which climbed 61.5% year on year to US$1.6 billion.
Free cash flow increased by 12% year on year to US$3.47 billion for FY2025.
Next-generation security annual recurring revenue (ARR) grew 32% year on year to US$5.6 billion.
In the middle of last month, PAN announced two new security solutions to help organisations keep pace with dynamic cloud and AI environments.
These updates help enterprises to be more agile and gain the required defences to protect their business and secure their workloads.
Separately, PAN also announced the acquisition of CyberArk Software (NASDAQ: CYBR), which will help to establish its identity security on a new core platform.
The purchase price was around US$25 billion for the company and was done at a 26% premium to the volume-weighted average price of CyberArk’s shares.
Ecolab (NYSE: ECL)
Ecolab offers water, hygiene, and infection prevention solutions and services.
The company employs around 48,000 staff and operates in more than 170 countries.
Ecolab reported a respectable set of earnings for the first half of 2025 (1H 2025).
Revenue stayed flat year on year at US$7.7 billion while operating profit increased by 7.7% year on year to US$1.27 billion.
Net profit inched up 2.6% year on year to US$926.7 million.
The business churned out a positive free cash flow of US$616.6 million for the half-year.
A cash dividend of US$0.65 was declared and paid, 14% higher than what was paid out a year ago.
The company expects to overcome the unpredictable operating environment through new business wins, value, surcharge pricing, and improved productivity.
Ecolab expects 2025’s earnings per share to be in the range of US$2.02 to US$2.12, rising by 10% to 16% year on year.
DexCom (NASDAQ: DXCM)
DexCom is a medical device company that manufactures and sells products used to help diabetes patients track and monitor their glucose levels using a continuous glucose monitor (CGM).
For 1H 2025, Dexcom also reported a solid set of earnings with revenue rising nearly 14% year on year to US$2.2 billion.
Operating profit climbed 33.7% year on year to US$346.3 million, but net profit dipped slightly to US$285.2 million because of a sharply higher tax bill.
DexCom continued to generate a healthy free cash flow of US$305.5 million for 1H 2025.
Diabetes is poised to become a global epidemic, with sufferers (adults aged 20 to 79) rising from 589 million in 2024 to 853 million by 2030.
DexCom’s CGM devices can help to achieve better health outcomes by allowing people to monitor and track their blood glucose levels.
The company believes it has a long runway in its core US market, as there are 4.5 million people on insulin who are not on CGM.
There is also a massive opportunity in other markets, such as pre-diabetes and gestational diabetes.
Hubspot (NYSE: HUBS)
Hubspot provides a cloud platform to help businesses connect better and grow.
The company offers AI engagement hubs, a smart customer relationship management (CRM) system, and a connected ecosystem with 1,700 app marketplace integrations.
For 1H 2025, Hubspot saw its revenue climb 17.6% year on year to US$1.47 billion.
Gross profit improved by 16.3% year on year to US$1.24 billion.
The business also churned out a positive free cash flow of US$259.8 million for 1H 2025, 28.7% higher than a year ago.
Customer count grew to 267,982 as of 30 June 2025, up 18% year on year.
Calculated billings also increased by 26% year on year to US$814.3 million.
The company believes that it has a large total addressable market of US$76 billion with less than 10% penetration across all products.
This market looks set to grow to US$128 billion by 2029.
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Disclosure: Royston does not own shares in any of the companies mentioned.
