X0202 4 2004-09-01 0 0001003642 IMPAX LABORATORIES INC IPXL 0001245203 CHU MAY 0 1 0 0 Senior VP Quality Affairs Purchase of common stock through ESPP 2004-09-01 2004-09-01 4 P 0 159 12.58 A 61363 D Common stock 83027 I Owned by husband, John Chu Option to purchase common stock 0.75 1996-09-09 1996-09-09 4 A 0 13373 0.75 A 1997-09-09 2006-09-09 Common stock 13373 13373 D Optio to purchase common stock 0.75 1999-04-02 1999-04-02 4 A 0 46716 0.75 A 2000-04-02 2009-04-02 Common stock 46716 46716 D Option to purchase common stock 5.25 2000-08-01 2000-08-01 4 A 0 16000 5.25 A 2001-08-01 2010-08-01 Common stock 16000 16000 D Option to buy common stock 5.625 2000-12-19 2000-12-19 4 A 0 15000 5.625 A 2001-12-19 2010-12-19 Common stock 15000 15000 D Option to purchase common stock 6.72 2002-03-08 2002-03-08 4 A 0 30000 6.72 A 2003-03-08 2012-03-08 Common stock 30000 30000 D Option to purchase common stock 3.04 2003-03-10 2003-04-04 4 A 0 20000 3.04 A 2004-03-10 2013-03-10 Common stock 20000 20000 D Option to purchase common stock 23.05 2004-04-14 2004-04-20 4 A 0 25000 23.05 A 2005-04-14 2014-04-14 Common stock 25000 25000 D Option to purchase common stock 20.78 2004-06-25 2004-06-28 4 A 0 10000 20.78 A 2005-06-25 2014-06-25 Common stock 10000 10000 D Option granted John Chu to purchase common stock 5.25 2000-08-01 2000-08-01 4 A 0 20000 5.25 A 2001-08-01 2010-08-01 Common stock 20000 20000 I Options granted to husband, John Chu Option granted John Chu to purchase common stock 5.625 2000-12-19 2000-12-19 4 A 0 20000 5.625 A 2001-12-19 2010-12-19 Common stock 20000 20000 I Options granted to husband, John Chu Options granted John Chu to purchase common stock 6.72 2002-03-08 2002-03-08 4 A 0 20000 6.72 A 2003-03-08 2012-03-08 Common stock 20000 20000 I Options granted to husband, John Chu Options granted John Chu to purchase common stock 3.04 2003-03-10 2003-04-04 4 A 0 25000 3.04 A 2004-03-10 2013-03-10 Common stock 25000 25000 I Options granted to husband, John Chu Options granted John Chu to purchase common stock 22.15 2004-05-29 2004-06-01 4 A 0 6000 22.15 A 2005-05-29 2014-05-29 Common stock 6000 6000 I Options granted to husband, John Chu Date recipient notified. Date recipient notified. Date recipient notified. Date recipient notified. Date recipient notified. May Chu 2004-09-02