Investing in growth stocks is one of the best ways you can build your retirement fund.
Fortunately, many such stocks in the US market can deliver long-term capital appreciation.
To filter out these stocks, you need to look for companies with strong business models that are growing their revenue and free cash flows.
As the company becomes more valuable, investors will also be willing to pay a higher price for it, netting you attractive capital appreciation.
Here are five US stocks that you can consider for your growth stock buy watchlist.
DocuSign (NASDAQ: DOCU)
DocuSign is a software-as-a-service (SaaS) company that offers digital signatures to enable agreements to be signed securely and quickly.
The company has more than 1.7 million customers in over 180 countries.
DocuSign reported a strong set of earnings for the first quarter of fiscal 2026 (1Q FY2026) ending 30 April 2025.
Revenue rose 7.6% year on year to US$763.7 million while operating profit (net of restructuring charges) increased by 16.4% year on year to US$60.3 million.
Net profit excluding exceptional items climbed 14.6% year on year to US$72.1 million, boosted by interest and other income.
The business also generated a positive free cash flow of US$227.8 million, a slight 2% year-on-year dip.
Billings posted a healthy growth of 4% year on year to US$740 million for 1Q FY2026.
DocuSign expects total revenue for FY2026 to be between US$3.15 billion to US$3.16 billion, representing year-on-year growth of around 5.9% at the midpoint.
The board of directors also authorised an additional share buyback of US$1 billion, lifting the total authorisation to US$1.4 billion.
Okta (NASDAQ: OKTA)
Okta is an identity management company offering a SaaS platform for toggling user privileges and access protection.
Many brands rely on Okta for authentication and authorisation, allowing these businesses to run more smoothly and securely.
For 1Q FY2026, revenue rose 11.5% year on year to US$688 million.
Okta turned in an operating and net profit of US$39 million and US$62 million, respectively, reversing the previous year’s operating and net loss.
Free cash flow also jumped 11.2% year on year to US$238 million.
The business saw remaining performance obligations increase 21% year on year, in an encouraging sign that more customers are signing up with the SaaS company.
Management sees multiple growth vectors, such as platform innovation and landing and expanding in large enterprises, that can help bring the business to the next level.
The number of customers with annual contract value (ACV) of more than US$100,000 also grew to 4,870 from 4,800 at the end of FY2025.
The company believes it has a US$80 billion total addressable market to tap into that will present opportunities to grow its top and bottom lines.
Samsara (NYSE: IOT)
Samsara operates a “Connected Operations” platform that enables the connection of people, devices, and systems, allowing them to derive insights and enhance their operations.
The company boasts tens of thousands of customers in Europe and the US across a wide range of industries.
Samsara announced a commendable set of earnings for 1Q FY2026.
Revenue shot up 30.7% year on year to US$366.9 million while gross profit climbed 33.8% year on year to US$283.7 million.
The business’s gross margin improved from 75.6% to 77.3%.
Free cash flow more than doubled year on year from US$18.6 million to US$45.7 million.
Customers are also spending more – those with more than US$100,000 of annual recurring revenue (ARR) increased from 1,953 in 1Q FY2025 to 2,638 in 1Q FY2026.
For FY2026, total revenue is expected to grow between 24% year on year to US$1.55 billion.
Braze (NASDAQ: BRZE)
Braze operates a customer engagement platform that enables marketers to collect data from any source, allowing them to engage with customers in real-time and across multiple channels.
The company released a robust set of earnings for 1Q FY2026.
Revenue rose 19.6% year on year to US$162.1 million while gross profit climbed 22.3% year on year to US$111.2 million.
The business’s gross margin increased from 67.1% to 68.6%.
Braze also saw its free cash flow generation double from a year ago to US$22.9 million.
The total number of customers increased from 2,102 in 1Q FY2025 to 2,342 in 1Q FY2026.
Those with an ARR of more than US$500,000 increased from 212 to 262 over the same period.
Braze also completed the acquisition of OfferFit, an AI decision-making company, during the quarter.
This acquisition allows brands to benefit from complementary products that can transform their customer relationships.
Revenue guidance for FY2026 was US$704 million at the midpoint, representing year-on-year growth of 18.6%.
Fortinet (NASDAQ: FTNT)
Fortinet sells more than 50 enterprise-grade cybersecurity products to help secure people, devices, and data.
For the first quarter of 2025 (1Q 2025), Fortinet reported a 13.8% year-on-year increase in revenue to US$1.5 billion.
Operating profit leapt 41.3% year on year to US$453.8 million while net profit surged 44.8% year on year to US$433.4 million.
The cybersecurity outfit generated US$796.8 million of free cash flow, up nearly 31% year on year.
Revenue is expected to come in at US$6.75 billion for 2025, representing year-on-year growth of 13.3%.
Billings came in 13.5% higher than the previous year at US$1.6 billion for 1Q 2025, in an encouraging sign that this momentum can continue.
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Disclosure: Royston Yang does not own shares in any of the companies mentioned.
