Hollingsworth, Rothwell & Roxford, a self-described merger and acquisition partnership, said it has filed a complaint with the US Securities and Exchange Commission about Zapata Corp’s anti-takeover filing.

Zapata, which produces fish meal and fish oil, rejected a US$45 per share unsolicited offer from HHR earlier this month, saying it was not in the best interest of the company and its shareholders.

HRR claims that the interests of 52.7% of Zapata’s shareholders are no longer represented by Zapata’s board, because no-one other than the Glazer family, who control the company’s board, can acquire the fish meal products maker.

HHR said in a statement that Zapata’s anti-takeover filing on 17 March makes it nearly impossible for anyone to acquire Zapata anymore, other than the Glazer family who own 47.3% of the company.

HHR has so far not provided details of how it would finance the bid, reported Reuters.