<Caption>
SHARES BENEFICIALLY SHARES BENEFICIALLY
OWNED SHARES BEING OWNED
PRIOR TO THE OFFERING OFFERED AFTER THE OFFERING
-------------------------- ------------ -------------------
NAME OF BENEFICIAL OWNER NUMBER % NUMBER %
- ------------------------ ------ - ------ -
<S> <C> <C> <C> <C> <C>
Thomas H. Lee Equity Fund III,
L.P. ............................ 21,749,345(1)(2)(3) 39.0% 3,992,322(22) 17,757,023 31.8%
Credit Suisse First Boston......... 6,572,289(2)(4)(5) 12.0 1,202,505(23) 5,369,784 9.8
J.P. Morgan Partners (BHCA),
L.P. ............................ 4,367,335(2)(6) 8.0 801,670 3,565,665 6.5
Merrill Lynch Entities............. 1,310,205(2)(7)(8) 2.4 240,503(24) 1,069,702 2.0
Paul M. Montrone................... 2,851,007(2)(9) 5.1 416,332 2,434,675 4.4
Paul M. Meister.................... 1,760,108(2)(10) 3.2 270,056 1,490,052 2.7
David T. Della Penta............... 524,387(2)(11) * 16,879 507,508 *
David V. Harkins................... 108,210(2)(12) * 19,863(25) 88,347 *
Kevin P. Clark..................... 110,100(2)(13) * 21,380 88,720 *
Todd M. DuChene.................... 107,963(2)(14) * 21,136 86,827 *
Scott M. Sperling.................. 54,105(2)(15) * 9,932(26) 44,173 *
Anthony J. DiNovi.................. 54,105(2)(16) * 9,932 44,173 *
Robert A. Day...................... 27,758(17) * -- 27,758 *
Kent R. Weldon..................... 8,115(2)(18) * 1,490 6,625 *
Mitchell J. Blutt, M.D.(6)......... -- -- -- -- --
Michael D. Dingman (19)............ -- -- -- -- --
All directors and executive
officers as a group (12
individuals)..................... 5,605,858(2)(20)(21) 9.9% 787,000 4,818,858 8.5%
</Table>
43
<PAGE>
<Table>
<Caption>
SHARES BENEFICIALLY SHARES BENEFICIALLY
OWNED SHARES BEING OWNED
PRIOR TO THE OFFERING OFFERED AFTER THE OFFERING
-------------------------- ------------ -------------------
OTHER SELLING STOCKHOLDERS(27) NUMBER % NUMBER %
- ------------------------------ ------ - ------ -
<S> <C> <C> <C> <C> <C>
Michael Brown...................... 92,540 * 6,411 86,129 *
Thomas Evangelista................. 39,305 * 6,049 33,256 *
Robert Forte....................... 72,821 * 23,400 49,421 *
Jeffrey Gleason.................... 51,329 * 19,844 31,485 *
Kenneth J. Hessler................. 13,448 * 2,028 11,420 *
Leroy Hood......................... 52,785 * 10,000 42,785 *
Bradley Mahood..................... 24,199 * 6,005 18,194 *
Carolyn Miller..................... 23,376 * 1,989 21,387 *
Paul Patek......................... 145,163 * 25,135 120,028 *
Neil Perlman....................... 67,502 * 13,737 53,765 *
Charles Rohlmeier.................. 12,072 * 2,477 9,595 *
John R. Sasso...................... 42,615 * 22,615 20,000 *
Carlton G. Stott................... 13,810 * 1,886 11,924 *
Albert Strausser III............... 25,991 * 3,013 22,978 *
Steven Shulman..................... 75,740 * 10,000 65,740 *
Michael Toner...................... 86,040 * 12,628 73,412 *
</Table>
- ---------------
* Less than 1% |
