CSG Shares Plunge 13% as Hunterbrook Short-Seller Report Triggers Crisis of Credibility

Hunterbrook Media claims Czechoslovak Group is a trader, not a manufacturer; shares down over 50% since January amid €1.4B shareholder dispute.

The Czechoslovak Group is fighting to contain the fallout from a devastating short-seller attack that has wiped more than half the company’s market value since January. Shares in the Amsterdam-listed defence conglomerate tumbled 13.1 percent on Monday after Hunterbrook Media published a lengthy investigation alleging the company has massively overstated its ammunition production capacity.

The stock now trades at €16.23, a far cry from its January high of €33.81 and barely above its 52-week trough of €15.73. The annualised volatility has surged past 85 percent, underscoring just how rattled investors have become.

Hunterbrook’s Core Allegation: A Shell, Not a Shell Maker

Hunterbrook’s report, released on 4 May after months of research, strikes at the very heart of CSG’s investment thesis. The short seller claims the company is not a genuine ammunition manufacturer but rather a trader that buys, refurbishes and resells existing stockpiles. As global inventories of ageing munitions dwindle, Hunterbrook argues, this business model has an expiration date.

The most damaging charge concerns production capacity. CSG stated in its IPO prospectus that it can produce roughly 630,000 large-calibre rounds annually, with 80 percent in the critical 155-millimetre calibre. Hunterbrook counters that only the company’s plant in Dubnica, Slovakia, is capable of final assembly for such munitions, and estimates actual annual output at between 100,000 and 280,000 units — a fraction of what was advertised to investors.

Two additional headaches compound the picture. A NATO procurement body suspended CSG’s Spanish munitions factory in March, a move the company describes as temporary. More troubling is the revelation that a minority shareholder exercised a put option shortly before the IPO, demanding roughly €1.4 billion for its stake.

The €1.4 Billion Shareholder Dispute

That minority shareholder is Terzo Company, controlled by Petr Kratochvíl, which is pursuing the claim through an opt-out procedure. CSG spokesman Andrej ?írtek has characterised the matter as a “routine commercial affair,” insisting that no binding valuation has been reached and that media reports of the specific sum are speculative. The company maintains that all minority stakes were fully disclosed in the IPO prospectus ahead of January’s listing — Europe’s largest ever defence flotation.

CSG has been more forthcoming on another financial point. An internal receivable of €275 million, stemming from the pre-sale of non-core assets including the mobility, healthcare and Perazzi divisions, was fully settled in cash during the first quarter of 2026. Management presents this as evidence of clean inter-company dealings, hoping to assuage investor concerns about transparency.

CSG Fires Back

The company has issued two rebuttals, branding the Hunterbrook report inaccurate and misleading. CSG argues that the short seller misunderstood its distributed production network, which spans multiple countries. The company reaffirmed its capacity figures and reiterated plans to boost in-house output by roughly 20 percent in 2026, with a medium-term target of 1.1 million rounds annually across facilities in Slovakia, Greece, Serbia, Spain and India. Legal action against Hunterbrook is under consideration.

Management also sought to clarify the much-discussed €58 billion figure that has circulated in media reports. That number represents the potential value of a seven-year framework agreement with Slovakia — not a secured order book.

Analyst Confidence Holds — For Now

Despite the carnage, the sell-side remains remarkably bullish. The average price target stands at €35.55, and all eight analysts covering the stock rate it a buy. Not a single sell recommendation exists.

The real test arrives on 20 May, when CSG reports its first quarterly results as a publicly traded company. Investors will scrutinise whether cash flows match management’s narrative and whether the order pipeline from NATO members and other clients can sustain the growth story. For a stock trading just above its 52-week low, those numbers will determine whether the short-seller thesis gains traction — or whether CSG can finally turn the tide.