We have some exciting news to share! The Motley Fool UK has now become The Twelfth Magpie -- an independent, UK-owned company, led by our long-serving UK management team — Mark Rogers, Chris Nials and Heather Adlington. In practical terms, it’s the same team you know, now fully focused on serving our UK readers and members.

Just as importantly, our approach remains unchanged: long-term, jargon-free, and on your side. This site is our new home, and there will be extra tweaks made across the coming few days as we settle in. So if anything looks a little off, please bear with us!

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.

Is £1,000,000,000 too rich a valuation for Sirius Minerals?

Is the Sirius Minerals plc (LON: SXX) share price too high, or is the stock a bargain?

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.

When you write down the market capitalisation of Sirius Minerals (LSE: SXX) in full, it looks like a lot of money: £1,091,810,000.

At first glance, that’s a hefty valuation for a firm with zero revenue, earnings or incoming cash flow. In fact, one well-known share research website unflatteringly labels the share a ‘Sucker Stock.’ However, I don’t think the stock market is the collective idiot that the label suggests because Sirius Minerals is all about the potential for future earnings.

XXX

Potential customers queuing up for the product

The firm has signed several offtake agreements with potential customers for its proposed Poly4 polyhalite potash product. One example is this week’s announcement of a strategic investment in the Cibra Group Companies, linked to a supply agreement for the supply and resale of POLY4 into Brazil and “certain other countries in South America.”

Many exciting-sounding deals have been announced by the company over the past few years, but it’s hard to quantify what effect they will all have on the eventual revenue, profits and incoming cash flow. In the meantime, Sirius is focused on the development of its Woodsmith Mine, which will access “the world’s largest and highest grade polyhalite deposit.” Who’d have thought you’d have found that under the North Yorkshire moors? But there it is, and Polyhalite is a unique multi-nutrient fertilizer, according to the company, which can be used to increase balanced fertilization around the world.

But the vast construction project to build the mine and infrastructure is a significant hurdle to overcome before any money flows into the coffers. In fact, big money has been flowing out, and the requirement for finance has been vast. Last month I reported on how the potential for cost-creep reared up and bit the firm when it announced its stage two funding requirement had increased by between $400m and $600m. I reckon the ongoing potential for delays and cost overruns remains high.

Major procurement complete

Meanwhile, on 12 November, Sirius told us the procurement process is complete for the major construction packages with the announcement that it has varied its existing mineral transport system (MTS) tunnelling contract with STRABAG AG to include the “engineering, procurement and construction of the fit-out of the MTS.” The works include the MTS conveyor, the maintenance railway, electrical and communications infrastructure, and all other services in the tunnel essential to the operation of the MTS.  

This one aspect of the construction project is mind-boggling in its proportions. The MTS will carry the mined polyhalite from 360 meters underground at the Woodsmith mine to the materials handling facility at Wilton, Teesside, “on a 37km underground conveyor system.”  Thirty-seven kilometres! You could walk along that tunnel all day and still not make it to the end of the conveyor It’s going to cost a lot of money. The firm expects the capital funding requirement of the project to be between $3.4bn – $3.6bn, although it previously thought $3bn would be enough to see it off, so that’s another example of cost-creep. The financial close of the firm’s stage 2 financing should happen in the first quarter of 2019.

The financial stakes are high and there’s no accurate way to determine if the firm is worth its £1bn-plus price tag. I see the shares as speculative.

Kevin Godbold has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Friends and sisters exploring the outdoors together in Cornwall. They are standing with their arms around each other at the coast.
Investing Articles

£503 buys 14 shares in this FTSE 250 stock that returned 23.9% annually for the last 15 years

This FTSE 250 stock has averaged a huge return for 15 years. At today's price, £503 buys 14 shares. But…

Read more »

Black woman using loudspeaker to be heard
Investing Articles

£1,000 buys 25 shares in this FTSE 100 stock that’s returned 29.2% annually for the last 10 years

This FTSE 100 mining stock has returned close to 30% a year for a decade. At 3,995p, £1,000 buys 25…

Read more »

Female student sitting at the steps and using laptop
Investing Articles

Down 47%, is this growth stock finally worth buying in May?

With a £288m order book and a hidden pipeline of defence and nuclear contracts, is this growth stock now too…

Read more »

House models and one with REIT - standing for real estate investment trust - written on it.
Investing Articles

2 REITs yielding 7%+ to consider for passive income in 2026

A REIT backed by the NHS and another backed by Tesco and Sainsbury's with both yielding 7%+. Here's why I'm…

Read more »

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

Just 97 shares of this UK dividend stock generate £238 in passive income

A 5.7% yield, £238 in passive income from just 97 shares, and one of the most divisive dividend stocks on…

Read more »

ISA coins
Investing Articles

£10,000 in an ISA generates a second income of…

The London Stock Exchange is home to some of the world's most generous dividends. But how big a second income…

Read more »

Shot of a senior man drinking coffee and looking thoughtfully out of a window
Investing Articles

Expert recommendations: 2 top income stocks yielding 7%+!

With yields of 7.2% and 7.8% respectively, these two income stocks are catching the eyes of institutional analysts. Should investors…

Read more »

Illustration of flames over a black background
Investing Articles

3 top income-focused stocks to buy in May 2026, according to experts

Looking for a stock to buy for income in May 2026? Experts have flagged these three UK dividend shares as…

Read more »