JOINT FILING UNDERTAKING
Exhibit 99.1
The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit
to this amendment to Schedule 13D to evidence the agreement of the below-named parties, in
accordance with the rules promulgated pursuant to the Securities Exchange Act of 1934, to file this
amendment to Schedule 13D jointly on behalf of each such party.
The execution and filing of this agreement shall not be construed as an admission that the
below-named parties are a group, or have agreed to act as a group.
DATED: December 8, 2010
BERKSHIRE FUND VII, L.P. |
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By: | Seventh Berkshire Associates LLC, | |||
its General Partner | ||||
By: | /s/ Xxxxxxxxxxx X. Xxxxxx | |||
Name: | Xxxxxxxxxxx X. Xxxxxx | |||
Title: | Managing Director | |||
BERKSHIRE FUND VII-A, L.P. |
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By: | Seventh Berkshire Associates LLC, | |||
its General Partner | ||||
By: | /s/ Xxxxxxxxxxx X. Xxxxxx | |||
Name: | Xxxxxxxxxxx X. Xxxxxx | |||
Title: | Managing Director | |||
BERKSHIRE INVESTORS LLC |
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By: | /s/ Xxxxxxxxxxx X. Xxxxxx | |||
Name: | Xxxxxxxxxxx X. Xxxxxx | |||
Title: | Managing Director | |||
BERKSHIRE INVESTORS III LLC |
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By: | /s/ Xxxxxxxxxxx X. Xxxxxx | |||
Name: | Xxxxxxxxxxx X. Xxxxxx | |||
Title: | Managing Director | |||
STOCKBRIDGE FUND, L.P. |
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By: | Stockbridge Associates LLC, | |||
its General Partner | ||||
By: | /s/ Xxxxxxxxxxx X. Xxxxxx | |||
Name: | Xxxxxxxxxxx X. Xxxxxx | |||
Title: | Managing Director | |||
STOCKBRIDGE PARTNERS LLC |
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By: | Berkshire Partners LLC, | |||
its sole Managing Member | ||||
By: | /s/ Xxxxxxxxxxx X. Xxxxxx | |||
Name: | Xxxxxxxxxxx X. Xxxxxx | |||
Title: | Managing Director | |||
STOCKBRIDGE FUND M, L.P. |
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By: | Stockbridge Associates LLC, | |||
its General Partner | ||||
By: | /s/ Xxxxxxxxxxx X. Xxxxxx | |||
Name: | Xxxxxxxxxxx X. Xxxxxx | |||
Title: | Managing Director | |||
STOCKBRIDGE ABSOLUTE RETURN FUND, L.P. |
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By: | Stockbridge Associates LLC, | |||
its General Partner | ||||
By: | /s/ Xxxxxxxxxxx X. Xxxxxx | |||
Name: | Xxxxxxxxxxx X. Xxxxxx | |||
Title: | Managing Director | |||
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