Home/Insiders/ZEILSTRA DAVID C
ZD
SEC Insider//CIK 0001243746

ZEILSTRA DAVID C

CIK 00012437461 companyDOWNERS GROVE, IL

Transactions

50

Companies

1

Filings

7

CIK

0001243746

Recent Transactions

50 trades
  • Exercise/Conversion

    Class A Common Stock

    2010-08-30$1.30/sh+3,00066,221 total
  • Exercise/Conversion

    Stock Options (Right to Buy)

    2010-08-303,00015,000 total
  • Tax Payment

    Class A Common Stock

    2008-12-21$23.57/sh1,16748,686 total
  • Tax Payment

    Class A Common Stock

    2008-12-21$23.57/sh1,16748,686 total
  • Award

    Class A Common Stock

    2008-01-02+10,00049,853 total
  • Tax Payment

    Class A Common Stock

    2008-01-02$25.77/sh98239,853 total
  • Exercise/Conversion

    Class A Common Stock

    2007-02-20$4.69/sh+20,00064,481 total
  • Exercise/Conversion

    Stock Options (Right to Buy)

    2007-02-2020,0000 total
  • Sale

    Class A Common Stock

    2007-02-20$30.80/sh2,50056,981 total
  • Sale

    Class A Common Stock

    2007-02-20$30.70/sh2,50054,481 total
  • Sale

    Class A Common Stock

    2007-02-20$30.51/sh2,50046,981 total
  • Sale

    Class A Common Stock

    2007-02-20$30.42/sh2,50044,481 total
  • Sale

    Class A Common Stock

    2007-02-20$30.57/sh5,00049,481 total
  • Sale

    Class A Common Stock

    2007-02-20$30.99/sh5,00059,481 total
  • Award

    Class A Common Stock

    2007-01-02+10,00044,481 total
  • Tax Payment

    Class A Common Stock

    2006-12-30$27.55/sh58734,481 total
  • Tax Payment

    Class A Common Stock

    2005-12-30$35.35/sh34523,691 total
  • Tax Payment

    Class A Common Stock

    2005-12-30$35.35/sh34523,691 total
  • Sale

    Class A Common Stock

    2005-07-25$30.19/sh1,20034,420 total
  • Sale

    Class A Common Stock

    2005-07-25$30.10/sh10034,320 total
  • Exercise/Conversion

    Stock Option (Right to Buy)

    2005-07-255,0000 total
  • Sale

    Class A Common Stock

    2005-07-25$30.09/sh30034,020 total
  • Sale

    Class A Common Stock

    2005-07-25$30.36/sh20037,920 total
  • Sale

    Class A Common Stock

    2005-07-25$30.00/sh2,70028,120 total
  • Sale

    Class A Common Stock

    2005-07-25$30.73/sh2,10042,020 total
  • Sale

    Class A Common Stock

    2005-07-25$30.28/sh50037,020 total
  • Sale

    Class A Common Stock

    2005-07-25$30.04/sh30032,820 total
  • Sale

    Class A Common Stock

    2005-07-25$30.01/sh1,00030,820 total
  • Sale

    Class A Common Stock

    2005-07-25$30.71/sh40040,120 total
  • Sale

    Class A Common Stock

    2005-07-25$30.07/sh70033,320 total
  • Exercise/Conversion

    Class A Common Stock

    2005-07-25$9.28/sh+5,00029,120 total
  • Sale

    Class A Common Stock

    2005-07-25$30.73/sh2,10042,020 total
  • Sale

    Class A Common Stock

    2005-07-25$30.36/sh20037,920 total
  • Sale

    Class A Common Stock

    2005-07-25$30.02/sh1,00031,820 total
  • Sale

    Class A Common Stock

    2005-07-25$30.20/sh80035,620 total
  • Sale

    Class A Common Stock

    2005-07-25$30.04/sh30032,820 total
  • Sale

    Class A Common Stock

    2005-07-25$30.35/sh20037,720 total
  • Sale

    Class A Common Stock

    2005-07-25$30.19/sh1,20034,420 total
  • Sale

    Class A Common Stock

    2005-07-25$30.10/sh10034,320 total
  • Sale

    Class A Common Stock

    2005-07-25$30.07/sh70033,320 total
  • Sale

    Class A Common Stock

    2005-07-25$30.05/sh10033,120 total
  • Sale

    Class A Common Stock

    2005-07-25$30.56/sh1,20038,720 total
  • Sale

    Class A Common Stock

    2005-07-25$30.31/sh20037,520 total
  • Sale

    Class A Common Stock

    2005-07-25$30.00/sh2,70028,120 total
  • Exercise/Conversion

    Stock Option (Right to Buy)

    2005-07-255,0000 total
  • Sale

    Class A Common Stock

    2005-07-25$30.55/sh60038,120 total
  • Sale

    Class A Common Stock

    2005-07-25$30.27/sh30036,720 total
  • Sale

    Class A Common Stock

    2005-07-25$30.71/sh40040,120 total
  • Exercise/Conversion

    Stock Option (Right to Buy)

    2005-07-2515,0000 total
  • Exercise/Conversion

    Class A Common Stock

    2005-07-25$10.53/sh+15,00044,120 total