$QS | Per The Elec, Korea’s Mplus has developed assembly equipment for QuantumScape cells and is validating it for mass production (industry sources, not confirmed by QS or Mplus). This lines up with QS’s Q2 2026 letter, which says the company is working closely with established battery equipment vendors to lay the groundwork for future factories. Mplus would be one of them. The trail goes back to spring. In April, Mplus said it had completed its solid-state equipment development and won pilot orders, adding it had already supplied pilot lines for several global SSB makers. In late July, Mplus said it was co-developing assembly equipment with an unnamed US SSB maker, with joint testing and validation at the customer’s request. On October 20, The Elec named that customer: QuantumScape. Reported scope: notching, stacking, packaging, plus high-temperature / high-pressure tools specific to solid-state. Who is Mplus: historically an SK On supplier (over 80% of revenue in 2022, about 22% in 2025). It has since broadened its base to US and European battery makers, including a European defense player for prismatic cells, believed to be Saft per the article. Order backlog: KRW 63.1B at end of Q2 2026. Eagle Line reminder (Q2 letter): core tool uptime > 90%, targeting another doubling of cell output in H2 2026. Most speculative part of the article: QS is reportedly considering outsourcing line operations, with talks with Korean battery makers. Nothing in QS disclosures confirms this so far. My hypothesis: in a licensing model (PowerCo up to 85 GWh/yr), an equipment vendor with tools already tuned to the QS process shortens ramp-up for every future licensee.