Heow Tan, Chief of Quality and Tech Operations at Pharmacyclics, Inc. (NASDAQ:PCYC), disposed of 10,000 shares of Common Stock, directly, for $123.58 per share yesterday. Furthermore, the insider exercised his use of stock options and following his first transaction of the fiscal year so far, Tan now holds a total of 1,873 company shares to his name.

Last Thursday the firm’s Chief Medical Officer, Jesse Mcgreivy, had completed a disposition of 34,062 shares of Common Stock for a price of $120.92 per share, marking the first insider stock sale at Pharmacyclics since Q1.

However, in terms of hedge fund shareholders, last quarter showed some interesting changes. Israel Englander’s Millennium Management increased its stakes in the $9.56 billion market cap biopharmaceutical firm by 290%, boosting its total shares to 224,162, with an estimated value of $22.46 million. To the contrary, Donald Chiboucis’s Columbus Circle Investors decreased the firm’s portfolio activity by 36% during Q1 and now owns a total of 883,877 shares, worth approximately $875.7 million.

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