| American Century Capital Portfolios, Inc. |
5% |
2,450,000 |
2,450,000 |
|
American Century Capital Portfolios, Inc. |
/s/ John Pak / Senior Vice President |
|
| American Century Investment Management, Inc. |
7.5% |
3,630,810 |
3,513,729 |
|
American Century Investment Management, Inc. |
/s/ John Pak / Senior Vice President |
|
| American Century Companies, Inc. |
7.5% |
3,630,810 |
3,513,729 |
|
American Century Companies, Inc. |
/s/ John Pak / Senior Vice President |
|
| Stowers Institute for Medical Research |
7.5% |
3,630,810 |
3,513,729 |
|
Stowers Institute for Medical Research |
/s/ Richard W. Brown / Chairman |
|