Are Purplebricks plc, Sirius Minerals plc and boohoo.com plc THE best growth stocks for your ISA?

Should you stuff your ISA portfolio with fast-growing Purplebricks plc (LON:PURP), Sirius Minerals plc (LON:SXX) and boohoo.com plc (LON:BOO)?

| More on:

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

Buying shares in small companies with excellent potential can be an incredibly rewarding long-term strategy. Holding these kind of shares in an ISA would be even better, since any capital gains or income won’t be taxed.  

With this in mind, let’s look at three hot growth stocks and ask whether you should make room for them in your portfolio.

Purple patch

Online estate agent Purplebricks (LSE: PURP) announced its first set of annual results this morning. Group revenues were up 448% (£18.6m) and gross profits rose by a 427%. The company sold £2.8bn of property in the last 12 months and visits to its website grew to 1.23m by April from 0.4m the previous year.

Much of Purplebricks’s appeal lies in its disruptive business model. In contrast to traditional agents charging a percentage of a property’s sale value, sellers pay a fixed fee for all marketing and administration. Instead of having its own agents, the company offers a flexible service using Local Property Experts (LPEs) who are able to work any day of the week and in the evenings. LPE recruitment is now ahead of plan and increased by 159% over the past year.

Although more established players are starting to adapt, Purplebricks is arguably streets ahead and is now looking to launch in Australia. Unsurprisingly, this advantage (and the potential for massive returns) is factored into the company’s vertigo-inducing valuation. It could be argued that there is far more chance of it disappointing shareholders and the market than succeeding. Then again, wasn’t the same thing said about ASOS and ARM Holdings?

Time to get serious?

Despite the odd bit of director dealing and updates about preferred contractors, fertilizer-producer, Sirius Minerals (LSE: SXX) hasn’t provided the market with much to feed on since the publication of the report from its definitive feasibility study in March.

This situation could change dramatically with confirmation that its harbour facilities have been approved and an announcement relating to the funding of the actual mine. Investors will be focusing on the AGM on June 24 (yes, the day after the EU referendum vote) and hoping for news from CEO, Chris Fraser.

Although a lot of work is clearly going on behind closed doors and the investment case has looked more positive in recent months, let’s be clear —  this is no ‘safe’ and dependable FTSE 100 stock (for now). Even just the suggestion that the board is struggling to raise funding for the mine could see the shares plummet.

As a current shareholder with retirement a few decades away, I’m willing to endure the roller-coaster ride ahead. However, Sirius forms only a small part of my diversified ISA portfolio — and for good reason.

Giving investors cheer

Before this week, boohoo.com (LSE: BOO) had been making its investors very happy indeed. A strong and sustained rise in the share price was further boosted by last week’s trading update. Revenue has jumped by 41% and overall gross margin is up 56%. The company now has 4.2 million active customers, a 30% increase on last year and expects sales growth of 25-30% for the financial year. The £61m cash on its balance sheet is also encouraging.

Paul Summers owns shares in Sirius Minerals and boohoo.com. The Motley Fool UK owns shares of and has recommended ASOS. The Motley Fool UK has recommended ARM Holdings. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Group of young friends toasting each other with beers in a pub
Investing Articles

FTSE 100 shares: has a once-a-decade chance to build wealth ended?

The FTSE 100 index has had a strong 2025. But that doesn't mean there might not still be some bargain…

Read more »

Passive income text with pin graph chart on business table
Investing Articles

I asked ChatGPT for its top passive income ideas for 2026 and it said…

Stephen Wright is looking for passive income ideas for 2026. But can asking artificial intelligence for insights offer anything valuable?

Read more »

Woman riding her old fashioned bicycle along the Beach Esplanade at Aberdeen, Scotland.
Investing Articles

Here’s how a 10-share SIPP could combine both growth and income opportunities!

Juggling the prospects of growth and dividend income within one SIPP can take some effort. Our writer shares his thoughts…

Read more »

Tabletop model of a bear sat on desk in front of monitors showing stock charts
Investing Articles

The stock market might crash in 2026. Here’s why I’m not worried

When Michael Burry forecasts a crash, the stock market takes notice. But do long-term investors actually need to worry about…

Read more »

Person holding magnifying glass over important document, reading the small print
Investing Articles

Is this FTSE 250 retailer set for a dramatic recovery in 2026?

FTSE 250 retailer WH Smith is moving on from the accounting issues that have weighed on it in 2025. But…

Read more »

Young Black woman using a debit card at an ATM to withdraw money
Investing Articles

I’m racing to buy dirt cheap income stocks before it’s too late

Income stocks are set to have a terrific year in 2026 with multiple tailwinds supporting dividend growth. Here's what Zaven…

Read more »

ISA Individual Savings Account
Investing Articles

Aiming for a £1k passive income? Here’s how much you’d need in an ISA

Mark Hartley does the maths to calculate how much an investor would need in an ISA when aiming for a…

Read more »

Two business people sitting at cafe working on new project using laptop. Young businesswoman taking notes and businessman working on laptop computer.
Investing Articles

Is investing £5,000 enough to earn a £1,000 second income?

Want to start earning a second income in the stock market? Zaven Boyrazian breaks down how investors can aim to…

Read more »