Since production got underway late last year, Lordstown Motors Company has produced 31 all-electric Endurance pickup trucks for sale, according to a regulatory filing.

Of those 31 trucks, six have been delivered to customers, fifteen will be used for sales, demonstration drives, marketing, and service training before being sold, the company stated in a document filed with the Securities and Exchange Commission.

Lordstown Motors says the remaining ten or so unites will be sold after what the company describes as the “completion of updates, final inspection, and establishment of service arrangements to meet customer specifications.”

In late November the company announced the first Endurance EVs were shipped out for delivery.

The filing also says Lordstown Motors expects a slow rate of production through the first quarter of this year, citing supply chain constraints.

LMC says the primary supply factor involves the availability of components used to make the hub motors which work in concert to power each of the Endurance's four wheels.

The filing comes as the Endurance goes on display at the Consumer Electronics Show in Las Vegas, Thursday through Sunday.

 Edward Hightower, Lordstown Motor’s Chief Executive Officer and President, will take part in the Mobility in Harmony Consortium Press Conference on Thursday at 11 a.m.

It has been three years since General Motors sold its former Lordstown Assembly Plant to the fledgling electric vehicle maker.