Rheinmetall AG shares experienced a sharp decline on Wednesday, dropping 13.5% to €1,009 at 10:04 CEST, after briefly touching a 52-week low of €972 earlier in the session. The sell-off wiped out approximately €7.4 billion in market value, as investors reacted to reports that Germany may cancel its planned €12 billion F126 frigate order in favor of rival ThyssenKrupp Marine Systems (TKMS).
The F126 program, which would have been Germany's largest warship construction since World War II, was a cornerstone of Rheinmetall's naval expansion strategy. CEO Armin Papperger had indicated in May that the contract signing was expected in the second quarter, calling it "the biggest contract for sure." The loss of this deal represents nearly 60% of the expected contract value, intensifying scrutiny of Rheinmetall's pivot toward a pure defense focus.
Rheinmetall has been reshaping its business to concentrate on defense, recently completing the sale of its automotive unit to AEQUITA for approximately €350 million. The automotive division generated roughly €2 billion in revenue in 2025. The company has set a 2026 sales target of €14 billion to €14.5 billion and projected its order backlog could exceed €135 billion this year. However, CFO Klaus Neumann had previously flagged cash flow volatility, noting that free cash flow conversion remains highly uncertain.
The broader defense sector also felt the impact, with the STOXX Europe aerospace and defense index slipping 1.7% in early trading. TKMS shares, in contrast, jumped 8.7% on the prospect of securing the contract for its smaller Meko A-200 frigates. This shift underscores the competitive dynamics in European naval shipbuilding, where contract risk and project execution are key investor concerns.
Analysts have pointed to execution risk as a persistent overhang for Rheinmetall. Morningstar equity analyst Loredana Muharremi, CFA, noted in May that investor concerns included execution misses, slow backlog conversion, naval uncertainty, and ceasefire risk, though she described these as "overblown." Wednesday's move suggests the naval issue has become a tangible threat to the company's growth narrative.
Adding to the landscape, KNDS, the maker of Leopard 2 tanks and Caesar howitzers, announced plans to list 20% of its shares in an IPO valued at around €15 billion. This would introduce another major European defense player for investors to evaluate alongside Rheinmetall.
The downside risk remains significant. While the F126 cancellation is based on media reports and not an official decision, a confirmed loss could lead the market to reassess Rheinmetall's naval growth prospects. Conversely, if Berlin revives the program or offers Rheinmetall alternative naval contracts, shares could recover some of Wednesday's losses. Investors are now closely watching cash flow, margins, and the pace of backlog conversion as key metrics for the stock's future trajectory.
