The European Union has suspended the most prominent conservative think tank in Brussels from its lobbying register, cutting off its direct access to the very institutions it was created to influence. On 15 June, the secretariat of the EU Transparency Register suspended the registration of MCC Brussels — the Belgian outpost of Hungary's Mathias Corvinus Collegium — over its refusal to fully disclose how it is financed.
The practical effect is immediate. A suspended organisation loses the access badges and meeting rights that come with a place on the register, the shared database the European Parliament, Commission and Council use to track who is lobbying them. MCC Brussels says it will appeal, and has cast the move as a politically motivated attempt to marginalise a rare conservative voice in a capital it views as dominated by the centre-left.
The suspension did not come from nowhere. It follows a formal complaint lodged in 2025 by Corporate Europe Observatory, a watchdog that scrutinises lobbying in the EU capital, which accused MCC Brussels of failing to declare basic information required of every registered organisation: the size of its budget and the sources of its money. After the secretariat opened an investigation, MCC Brussels disclosed that it operates on an annual budget of roughly €6.3 million — figures that, according to Corporate Europe Observatory, make it the second-best-funded think tank in Brussels.
At the centre of the dispute is the register's "single registration" principle, a rule designed to stop one network from spreading itself across multiple entries to obscure its true scale and backing. MCC Brussels is funded through the Mathias Corvinus Collegium, a Hungarian education foundation endowed by Viktor Orbán's government with public assets and shareholdings in major Hungarian companies — a structure critics argue makes both its independence and its true resources difficult to trace.
The two sides describe the same event in irreconcilable terms. For Corporate Europe Observatory, this is routine enforcement. The decision, its research coordinator argued, amounts to "simply an organisation being held to the same transparency standards as everyone else seeking to influence EU policymaking" — and MCC's complaints of persecution cannot obscure its own failure to file. For MCC Brussels and its allies in the European conservative press, the same facts describe something else entirely: a bureaucratic instrument turned into a weapon against an ideological opponent, and proof, as they see it, that Brussels enforces transparency most zealously when the target sits on the right.
The fight is small in euros but outsized in precedent. The Transparency Register is voluntary and largely toothless, and suspension is one of the few real sanctions it can impose. Using it against a high-profile, politically connected think tank turns the case into a test of whether the rules apply evenly. If the register is seen to enforce its standards consistently, it bolsters a system that has long struggled to compel disclosure. If MCC's framing takes hold — that the rules are a cudgel wielded selectively — it hands Eurosceptics a fresh grievance and clouds the EU's claim to be cleaning up its lobbying culture. The timing sharpens both readings: Brussels is already under scrutiny over record corporate-lobbying spending and the pull of money on its pro-business policy turn.
