Proterra

Closed (deSPAC)

Profile in progress

What it is: Proterra is a leader in the design and manufacture of zero-emission electric transit vehicles and EV technology solutions for commercial applications
What it’s doing now: Merging with ArcLight Clean Transition Corp. (ACTC) — closed (despac).
What you should know: Data is still being assembled for this company — what is shown below is everything we have verified so far.

The business, per its filings

SEC primary

Proterra is a leader in the design and manufacture of zero-emission electric transit vehicles and EV technology solutions for commercial applications. With industry-leading durability and energy efficiency based on rigorous U.S. independent testing, Proterra products are proudly designed, engineered, and manufactured in America, with offices in Silicon Valley, South Carolina, and Los Angeles. For more information, please visit www.proterra.com

What the company says about itself

Web research — not audited

Proterra is an electrification partner for transportation and equipment manufacturers, providing zero-emission battery solutions for heavy-duty on- and off-road vehicles. They offer the Onyx Slate and Onyx Strata battery platforms, designed for applications including commercial transit, school buses, Class 8 trucks, off-highway equipment, and specialty vehicles. The company emphasizes engineering expertise, vehicle integration, and servicing, with batteries designed in California and manufactured in South Carolina.

Markets:: Transportation | Commercial Equipment | Electric Vehicles
Products:: Onyx Slate | Onyx Strata | Rapid Development Starter Pack

What our web check found

[WEB-INTEL 2026-08-26] 1 finding(s) · web source asserts a FILING-ONLY figure (deadline / trust / status / floor / price) and it was NOT stored: "the business combination is expected to close on June 14, 2021" [https://www.prnewswire.com/news-releases/arclight-clean-transition-corp-announces-shareholder-approval-of-business-combination-with-proterra-301310987.html]

Source: https://proterra.com/ · captured Aug 26, 2026 · marketing claims are reported as claims, never merged into the filed figures above.

The deal it’s entering

Proterra is merging with ArcLight Clean Transition Corp. (ACTC) currently marked Closed (deSPAC).

Headline equity value	—
PIPE	≈ $415M · unsourced

Structure per SEC accession(s) 0001213900-21-006287. How to read these numbers: headline vs effective valuation · what a definitive agreement commits

What exactly is being valued, and at what

Common questions

Is Proterra going public?

Proterra has an approved merger with the SPAC ArcLight Clean Transition Corp. (ACTC). Deal status: Closed (deSPAC).

Does Proterra have revenue?

The filings we've parsed don't state a usable revenue figure yet; this profile is updated as new documents land.

Educational content, not investment advice.