X0303 4 2011-05-23 0 0000912593 SUN COMMUNITIES INC SUI 0001216321 PIASECKI RONALD L 27777 FRANKLIN ROAD SUITE 200 SOUTHFIELD MI 48034 1 0 0 0 Common Stock, $0.01 Par Value 2011-05-23 4 M 0 750 34.92 A 750 D Common Stock, $0.01 Par Value 2011-05-23 4 M 0 750 35.44 A 1500 D Common Stock, $0.01 Par Value 2011-05-23 4 M 0 1500 35.05 A 3000 D Common Stock, $0.01 Par Value 2011-05-23 4 M 0 1500 32.63 A 4500 D Common Stock, $0.01 Par Value 2011-05-23 4 M 0 1500 29.91 A 6000 D Common Stock, $0.01 Par Value 2011-05-23 4 M 0 1000 17.20 A 7000 D Common Stock, $0.01 Par Value 2011-05-23 4 M 0 500 14.95 A 7500 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.18 D 7400 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.19 D 7300 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.205 D 7200 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.223 D 7100 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.24 D 7000 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 200 38.25 D 6800 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.26 D 6700 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.27 D 6600 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.28 D 6500 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 500 38.29 D 6000 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.295 D 5900 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 600 38.30 D 5300 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.31 D 5200 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.32 D 5100 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.324 D 5000 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 41 38.33 D 4959 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 360 38.34 D 4599 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 36 38.35 D 4563 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 500 38.40 D 4063 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.401 D 3963 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 200 38.402 D 3763 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 400 38.41 D 3363 D Common Stock, $0.01 Par Value 2011-05-23 4 S 0 100 38.42 D 3263 D Stock Option 34.92 2011-05-23 4 M 0 250 0 D 2002-12-31 2011-12-31 Common Stock 250 500 D Stock Option 34.92 2011-05-23 4 M 0 250 0 D 2003-12-31 2011-12-31 Common Stock 250 250 D Stock Option 34.92 2011-05-23 4 M 0 250 0 D 2004-12-31 2011-12-31 Common Stock 250 0 D Stock Option 35.44 2011-05-23 4 M 0 250 0 D 2005-05-20 2014-05-20 Common Stock 250 500 D Stock Option 35.44 2011-05-23 4 M 0 250 0 D 2006-05-20 2014-05-20 Common Stock 250 250 D Stock Option 35.44 2011-05-23 4 M 0 250 0 D 2007-05-20 2014-05-20 Common Stock 250 0 D Stock Option 35.05 2011-05-23 4 M 0 500 0 D 2006-05-24 2015-05-24 Common Stock 500 1000 D Stock Option 35.05 2011-05-23 4 M 0 500 0 D 2007-05-24 2015-05-24 Common Stock 500 500 D Stock Option 35.05 2011-05-23 4 M 0 500 0 D 2008-05-24 2010-05-24 Common Stock 500 0 D Stock Option 32.63 2011-05-23 4 M 0 500 0 D 2007-05-25 2016-05-25 Common Stock 500 1000 D Stock Option 32.63 2011-05-23 4 M 0 500 0 D 2008-05-25 2016-05-25 Common Stock 500 500 D Stock Option 32.63 2011-05-23 4 M 0 500 0 D 2009-05-25 2016-05-25 Common Stock 500 0 D Stock Option 29.91 2011-05-23 4 M 0 500 0 D 2008-05-23 2017-05-23 Common Stock 500 1000 D Stock Option 29.91 2011-05-23 4 M 0 500 0 D 2009-05-23 2017-05-23 Common Stock 500 500 D Stock Option 29.91 2011-05-23 4 M 0 500 0 D 2010-05-23 2017-05-23 Common Stock 500 0 D Stock Option 17.20 2011-05-23 4 M 0 500 0 D 2009-07-18 2018-07-30 Common Stock 500 1000 D Stock Option 17.20 2011-05-23 4 M 0 500 0 D 2010-07-18 2018-07-30 Common Stock 500 500 D Stock Option 14.95 2011-05-23 4 M 0 500 0 D 2010-07-29 2019-07-29 Common Stock 500 1000 D Converts to common stock on a one-for-one basis. Ronald L. Piasecki 2011-05-25