An HTC executive has confirmed to The Wall Street Journal that the company has sold 5 million HTC One handsets since the device went on sale back in March. That’s not quite the same level of demand Samsung has seen for the Galaxy S4, but it’s still a very good number.

Furthermore, the unnamed executive says demand is still so strong that it is struggling to keep up with orders.

“Orders are pretty good so far and are still more than what we can supply,” they told WSJ. “This is partly due to the shortage of components. When the issue is resolved next month, we will have a better idea if it’s doing really well or not.”

HTC has already said that it will double One production this month, which should make the device easier to obtain. The company expects revenue in the second quarter of 2013 to reach around NT$70 billion ($2.4 billion) as a result, which is almost $1 billion more than the company saw during the first quarter.

The One’s biggest competitor, the Galaxy S4, has just surpassed the 10 million sales mark following its debut back in April. Admittedly, Samsung counts sales to operators and retailers, rather than to consumers — so the number of handsets actually sold to end users might be a little less than that.

But the Galaxy S4 is selling incredibly well, and it’ll almost certainly be the best-selling Android smartphone of 2013.

Nevertheless, HTC should be happy with 5 million One sales, particularly with those supply issues that have hampered the device’s launch. It shows the handset has gotten off to a good start, and hopefully for HTC it will continue to sell well in the coming months.

HTC appears to be going through a bit of a rough patch at the moment. Back in January, the company reported its lowest income in nine years, and yesterday it was reported that company executives are leaving at a worrying rate.