Pharmaceutical US drugmaker Alexion Pharmaceuticals (Nasdaq: ALXN) says it has been notified of an , unsolicited "mini-tender" offer by TRC Capital Corp to purchase up to 1.5 million shares, or about 0.77%, of the outstanding Alexion common stock at a price of $90.50 per share. TRC's offer price represents approximately a 5.06% discount to the closing price of Alexion common stock on February 5, 2013, the last closing price on the day prior to the date of the offer. In addition, TRC's offer is subject to numerous conditions. 7 February 2013