BRUSSELS (Reuters) - German drugmaker Merck (>> Merck KGaA) has offered concessions in a bid to convince European Union antitrust regulators to clear its proposed $17 billion (11 billion pounds) acquisition of U.S. peer Sigma-Aldrich Corp (>> Sigma-Aldrich Corporation).

Earlier this month, Merck said the European Commission expressed concerns "of a limited nature" over its biggest ever takeover. It submitted concessions on May 22, according to a filing on the EU executive's website. No details were provided.

The EU competition watchdog will now decide by June 15 instead of June 1 whether to approve the takeover.

Companies typically offer to sell overlapping assets or provide rivals access to technologies or patents to allay regulatory worries that the merged entity may have an excessive market share.

(Reporting by Foo Yun Chee. Editing by Jane Merriman)

Stocks treated in this article : Sigma-Aldrich Corporation, Merck KGaA