Tesla disclosed in its annual shareholder report filed with the U.S. Securities and Exchange Commission that its third-generation Optimus humanoid robot is ready for mass production and that the company is building its first production lines1. The filing also states Tesla is expanding data center capacity for AI training. Tesla did not disclose production scale, pricing, or delivery timeline for the third-generation unit.
The disclosure aligns with earlier guidance: Tesla's fourth-quarter 2025 earnings materials said the company planned to start production of the third-generation Optimus by the end of 2026. Elon Musk said in a social media post that Optimus and the Cybercab autonomous vehicle will account for the vast majority of Tesla's value.
Supply-chain signals from China
The filing's language triggered a broad rally in China A-share humanoid-robot concept stocks on October 20. Zhejiang Rongtai, Fulai New Materials, Ningbo Dongli, and Daye closed at the daily limit, while Huayi Technology, Rujing Technology, and Anpeilong at one point rose more than 10%.
Several component makers offered partial confirmation that robot-related orders are flowing. Zhejiang Rongtai said it delivered robot component products to domestic and overseas customers in the first half of 2026 and was actively scheduling production in line with customer orders. Hengli Hydraulic said in its 2026 interim report that several new transmission products have achieved volume production and supply. Neither company confirmed a designated-supplier relationship with the Optimus program.
Zhejiang Sanhua Intelligent Controls said it is working with a major customer on developing robot joint actuators, without naming the customer. Tuopu Group said it had not yet received notice of the current round of factory audits but confirmed cooperation with Tesla in areas including robot actuators.
Xinjian Transmission said on October 12 that Tesla's robot design is close to finalization and about to enter a mass-production cycle. The company described screws, linear drive joints, and linear electric drives for dexterous hands as core transmission components of humanoid robots, adding that those components account for a relatively high share of cost.
ANALYSIS The SEC filing moves Optimus from a development-stage project to one Tesla formally describes as production-ready, but the absence of volume, pricing, or delivery targets leaves the commercial trajectory undefined. Component makers' statements, while directionally supportive, stop short of confirming Optimus-specific contracts, keeping the supply-chain picture incomplete.
Tesla enters this disclosure cycle ahead of its October 21 earnings call, where management faces questions spanning robotaxi safety data and the company's broader autonomous-vehicle strategy[2].