If I had $15,000 ready to invest today, I would spread it evenly across three ASX shares I think can keep finding new ways to grow.
Here are three shares I would buy with the money.

Image source: Getty Images
Netwealth Group Ltd (ASX: NWL)
Netwealth would be my first pick.
This ASX share provides the investment platform and technology financial advisers use to manage client portfolios and superannuation.
I think the opportunity is increasingly about helping advice practices operate better. Advisers have to manage investments, reporting, administration, tax information, client communication, and an expanding range of products. A platform that can bring more of that work together can become increasingly important to how the practice runs.
Netwealth can keep improving those capabilities while competing for more advisers and client assets.
It also operates in a market with a strong long-term tailwind. Australia's pool of superannuation and investment wealth should continue expanding over the years ahead.
For me, $5,000 invested in Netwealth would be backing a company that could potentially capture more of that wealth while becoming more valuable to the people managing it.
Breville Group Ltd (ASX: BRG)
I would put another $5,000 into home appliance manufacturer Breville.
What I like here is the repeatability of the growth model. Breville can develop a strong product, build a reputation around it, take it into more countries, and then introduce those customers to other products across the kitchen.
Coffee has become a major strength, but I do not think the investment case needs to stop with espresso machines.
Breville has spent years building expertise in product design and a premium brand that can extend across many kitchen categories.
If the company keeps producing products people are willing to pay more for and expands its presence across international markets, I think it has a straightforward path to becoming a much larger global consumer business.
Catapult Sports Ltd (ASX: CAT)
My final $5,000 would go into Catapult Sports.
Professional sports organisations now generate enormous amounts of information from athlete tracking, video, training, and competition. The challenge is turning all of that information into better decisions.
Catapult is building technology around that entire process. Its products can help coaches and performance teams understand how athletes are moving, review matches, prepare tactics, and increasingly connect information that previously sat in separate systems.
I think that could make the company much more deeply involved in how sporting organisations work.
New areas such as athlete development, strength training, and scouting also give Catapult room to expand beyond the products it first became known for.
With professional sport played at enormous scale around the world, I think there is plenty of territory left for this ASX share to pursue.
Foolish takeaway
With $15,000 to invest, I would be comfortable giving each of these ASX shares $5,000.
The common thread for me is the ability to keep expanding what they already do well.
That gives me enough confidence to buy today and let the businesses, rather than short-term share price movements, determine the outcome over the years ahead.