Columbia Wanger Asset Management Llc

10 Feb 12

10 Feb 11

10 Feb 10

06 Feb 09

11 Oct 05

Price T Rowe Associates Inc /md/

Amended Statement Of Beneficial Ownership Of More Than 5%.

14 Feb 22

Amended Statement Of Beneficial Ownership Of More Than 5%.

14 Feb 22

10 Feb 16

10 Feb 98

05 Feb 98

Amvescap Plc \ga\

Amended Statement Of Beneficial Ownership Of More Than 5%.

10 Jan 01

Amended Statement Of Beneficial Ownership Of More Than 5%.

10 Jan 01

11 Feb 99

13 Oct 98

12 Feb 98

Barings Llc

Correspondence: Notice Of Effectiveness.

14 Dec 06

03 Feb 06

10 Feb 03

27 Jan 00

12 Jan 98

Wasatch Advisors Inc /adv

11 Jun 02

Amended Statement Of Beneficial Ownership Of More Than 5%.

13 Feb 01

10 Sep 99

12 Jun 98

25 Aug 97

Ariel Capital Management Inc Et Al

Amended Statement Of Beneficial Ownership Of More Than 5%.

09 Sep 02

Amended Statement Of Beneficial Ownership Of More Than 5%.

08 Aug 02

Amended Statement Of Beneficial Ownership Of More Than 5%.

20 Mar 01

05 Aug 99

07 Feb 97