WALTER JOHN C 4

4 · WESTERN GAS RESOURCES INC · Filed Sep 2, 2005

Form 4

Period: 2005-09-01

EVP & General Counsel

Transactions

Exercise/Conversion
Common Stock
2005-09-01$18.17/sh+12,000$218,040→ 19,364 total
Exercise/Conversion
Common Stock
2005-09-01$16.48/sh+12,119$199,661→ 31,483 total
Exercise/Conversion
Common Stock
2005-09-01$19.02/sh+18,333$348,602→ 49,816 total
Sale
Common Stock
2005-09-01$47.86/sh−42,452$2,031,753→ 7,364 total
Sale
Common Stock
2005-09-01$47.86/sh−7,364$352,441→ 0 total(indirect: By Spouse)
Exercise/Conversion
Stock Option (Right to Buy)
[F1]
2005-09-01−12,000→ 12,000 total
Exercise: $18.17From: 2002-06-25Exp: 2009-05-21→ Common Stock (12,000 underlying)
Exercise/Conversion
Stock Option (Right to Buy)
[F2]
2005-09-01−12,119→ 12,001 total
Exercise: $16.48From: 2003-10-23Exp: 2010-10-23→ Common Stock (12,119 underlying)
Exercise/Conversion
Stock Option (Right to Buy)
[F3]
2005-09-01−18,333→ 36,667 total
Exercise: $19.02From: 2004-09-22Exp: 2013-09-22→ Common Stock (18,333 underlying)

Footnotes (3)

[F1]On June 25, 2001, Reporting Person was granted options to purchase 60,000 shares of Western Gas Resources, Inc. common stock. Options vest in 20% annual increments commencing on the first anniversary of the grant date and expire on the earlier of five years from vesting or on May 21, 2009.
[F2]On October 23, 2002, Reporting Person was granted options to purchase 36,000 shares of Western Gas Resources, Inc. common stock. Options vest in 1/3 annual increments commencing on the first anniversary of the grant date and expire on the earlier of five years from vesting or on October 23, 2010.
[F3]On September 22, 2003, Reporting Person was granted options to purchase 55,000 shares of Western Gas Resources, Inc. common stock. Options vest in 1/3 annual increments commencing on the first anniversary of the grant date and expire on the earlier of (i) five years from vesting or (ii) ten years after the grant date.

Signature

/s/ John C. Walter|2005-09-01

Documents

1 file