Prospectus Supplement No. 9 Filed Pursuant to Rule 424(b)(3)
(To Prospectus Dated November 2, 1999) Registration No. 333-89345
Prospectus Supplement
Dated March 20, 2000
This prospectus relates to the resale by the holder of our:
o $300,000,000 principal amount of 6.25% convertible notes due 2009,
o $425,500,000 principal amount at maturity of 2.25% convertible notes
due 2009, and
o the shares of Class A common stock issuable upon conversion of the
notes.
This prospectus supplement should be read in conjunction with, and may
not be delivered or utilized without, the prospectus dated November 2, 1999,
including any amendments or supplements thereto. The terms of the notes are set
forth in the prospectus.
The information in the table appearing under the heading "Selling
Securityholders" on page 42 in the prospectus is hereby amended by adding the
information below with respect to selling securityholders not previously listed
in the prospectus or in any amendments or supplements thereto, and by
superceding the information with respect to selling securityholders previously
listed in the prospectus or in any amendments or supplements thereto that are
listed below:
<TABLE>
<CAPTION>
Principal Number of
Amount at Shares of Class Percentage of
Maturity of Percentage of A Common Stock Number of Class A
6.25% Notes 6.25% Notes Issuable Upon Shares of Common Stock
Beneficially Outstanding as Conversion of Class A Outstanding
Owned That of March 16, the 6.25% Notes Common Stock as of March
Selling Securityholders May Be Sold 2000 That May Be Sold Owned 16, 2000**
----------------------- ----------- --------------- ---------------- ------------ --------------
<S> <C> <C> <C> <C> <C>
Allstate Insurance Company $2,150,000 2.12 88,114 -- *
Alpine Associates 4,700,000 4.63 192,622 -- *
Alpine Partners, L.P. 800,000 * 32,786 -- *
========== ==== ======= ====== ====
TOTAL $7,650,000 7.53 313,522 -- *
<CAPTION>
Principal Number of
Amount at Shares of Class Percentage of
Maturity of Percentage of A Common Stock Number of Class A Common
2.25% Notes 2.25% Notes Issuable Upon Shares of Stock
Beneficially Outstanding as Conversion of Class A Outstanding as
Owned That of March 16, the 2.25% Notes Common Stock of March 16,
Selling Securityholders May Be Sold 2000 That May Be Sold Owned 2000**
----------------------- ----------- --------------- ---------------- ------------ ---------------
<S> <C> <C> <C> <C> <C>
Chrysler Corporation Master
Retirement Trust $ 0 0 0 -- 0
Delta Airlines Master Trust c/o
Oaktree Capital Management, LLC 0 0 0 -- 0
Motion Picture Industry Health
Plan - Active Member Fund 0 0 0 -- 0
Motion Picture Industry Health
Plan - Retiree Member Fund 0 0 0 -- 0
OCM Convertible Trust 0 0 0 -- 0
Partner Reinsurance Company, Ltd. 0 0 0 -- 0
State Employees' Retirement Fund
of the State of Delaware 0 0 0 -- 0
State of Connecticut Combined
Investment Funds 0 0 0 -- 0
Vanguard Convertible Securities
Fund, Inc. 0 0 0 -- 0
==== ==== ==== ====== ====
TOTAL $ 0 0 0 -- 0
<FN>
* Less than 1%.
** Includes shares issuable upon conversion of the notes and shares beneficially
owned as of March 16, 2000.
</FN>
</TABLE>
