SERIES AA PREFERRED STOCK PURCHASE AGREEMENT This SERIES AA PREFERRED STOCK PURCHASE AGREEMENT (the "Agreement") dated March 9, 1998 is entered into by and between Affymetrix, Inc., a California corporation (together with its successors, the...Series Aa Preferred Stock Purchase Agreement • March 24th, 1998 • Affymetrix Inc • Services-commercial physical & biological research • California
