NEW YORK, July 20, 2026 – Shares of Archer Aviation (NYSE: ACHR) experienced a significant rally on Monday, climbing 18.8% to $5.28 by 12:51 p.m. EDT, as trading continued on the New York Stock Exchange. The surge followed the debut of the Thunder aircraft, a new autonomous hybrid rotorcraft developed in collaboration with private defense contractor Anduril, at the Farnborough International Airshow.
The Thunder is classified as a Group 5 autonomous attack rotorcraft, equipped with a series hybrid-electric propulsion system and featuring two tilting rotors. It is designed for both military and commercial applications, capable of operating without a runway and accommodating modular payload configurations. This marks a strategic pivot for Archer, which has primarily focused on the passenger air taxi market.
The market's enthusiastic response added approximately $640 million to Archer's equity value, representing about 36% of its cash and short-term investments as of March. Notably, Monday's announcement did not specify a defense client or disclose the contract amount. Investors appear to be pricing in potential future deals ahead of Thunder's maiden flight, which is targeted for 2027.
Archer CEO Adam Goldstein emphasized the novelty of the design, stating, “We couldn’t simply tweak our existing aircraft,” referring to the Thunder as a clean-sheet initiative. The company has already conducted several test flights using full-size surrogate aircraft and plans to announce commercial partners later this week.
This defense sector entry could help Archer reduce its reliance on the passenger air taxi market, which has faced hurdles such as certification delays and substantial capital requirements. The move also sets Archer apart from its publicly traded peers. As of intraday data, Archer's stock outperformed Joby Aviation (NYSE: JOBY), which rose 3.2% to $7.46, and Vertical Aerospace (NYSE: EVTL), which gained 6.8% to $1.58. Archer led Joby by 15.6 percentage points and surpassed Vertical by 12.0 points, suggesting a bid focused specifically on the company.
Financially, Archer reported $1.776 billion in cash and short-term investments at the end of March. Operating activities consumed $149.1 million in cash during the quarter, with capital expenditures totaling $32.6 million. The company posted a loss of $217.7 million against revenue of $1.6 million and forecast an adjusted EBITDA loss for the second quarter between $170 million and $200 million. Archer stated in May it anticipated incremental government grants throughout 2026, but Monday's release did not confirm any contract.
Investors will be closely watching this week for announcements of customers and finalized deals, as well as updates on the 2027 flight target. Risks remain significant: Thunder has yet to complete a flight in its definitive configuration, the contract amount remains undisclosed, and Archer continues to operate at a loss with substantial cash needs.
