Hedge fund update: Sirios Capital Management

Another in a series of updates on Boston hedge fund holdings based on quarterly reports filed with the Securities and Exchange Commission this week:

Sirios Capital Management, a hedge fund operated by former MFS mutual fund manager John Brennan, reported assets of $2.4 billion as of June 30, up slightly from $2.3 billion the previous quarter. SEC filings report stock and some equity derivatives, but not other kinds of investments.

Among the 10 largest stocks owned by Sirios on June 30 were:

Allegheny Energy Inc. ($337.3 million), Progressive Corp. ($124.5 million), Schering-Plough Corp. ($112.8 million, AIG Inc. ($112.1 million), and Precision Castparts Corp. ($90.9 million).

Also, Allegheny Technologies Inc. ($90.8 million), Sonus Networks Inc. ($73.5 million), EW Scripps Co. ($73 million), Indymac Bancorp. ($68 million) and Medtronic Inc. ($62.6 million).

The top 10 reported holdings of Sirios for March 31 were:

Allegheny Energy, AIG, Precision Castparts, EW Scripps, Schering Plough, Allegheny Technologies Inc., Progressive, AmerisourceBergan Corp., Indymac, and Capital One Financial Corp.

The entire quarterly filing by Sirios is available here. You can read the firm’s first-quarter report here.