U.S. billionaire hedge fund manager Bill Ackman’s Pershing Square Capital Management acquired a small stake in Canadian investment giant Brookfield Corporation during the second quarter.

Toronto-based Brookfield controls Brookfield Asset Management, one of the world’s largest investment firms. Brookfield’s diverse holdings include a large commercial real estate portfolio.

New York-based Pershing Square previously reported the investment without disclosing that it was in Brookfield stock.

Pershing Square made the disclosure in its semi-annual financial statement, saying that it would discuss the details later. But a regulatory filing known as an F13 states that Pershing Square acquired 6,854,510 Brookfield shares for approximately US$284.7 million.

U.S. Securities and Exchange Commission rules require all hedge funds or institutions that manage more than $100 million to file quarterly reports on their holdings.

Pershing Square invested in Brookfield for the first time. During the same period, Pershing Square also acquired about $229.1 million worth of Nike stock.

“We intend to defer discussion about these new investments for now,” wrote Ackman in an investment manager’s report released with the quarterly financials.

Pershing Square Capital Management invests on behalf of U.K.-based Pershing Square Holdings.

Pictured: Brookfield industrial asset