<PAGE>
SUPPLEMENT NO. 7 DATED APRIL 30, 1997
TO PROSPECTUS DATED SEPTEMBER 3, 1996
RELATING TO $125,000,000 PRINCIPAL AMOUNT 5 5/8% CONVERTIBLE
SUBORDINATED NOTES DUE 2006 AND
3,654,971 SHARES OF
RENAL TREATMENT CENTERS, INC.
COMMON STOCK, $.01 PAR VALUE
All capitalized terms used but not defined herein shall have the meanings
prescribed in the Prospectus dated September 3, 1996, as supplemented by
Supplement No. 1 dated December 2, 1996, Supplement No. 2 dated December 9,
1996, Supplement No. 3 dated January 6, 1997, Supplement No. 4 dated January 13,
1997, Supplement No. 5 dated February 18, 1997 and Supplement No. 6 dated March
17, 1997, forming a part of Form S-3 Registration Statement No. 333-10839.
The purpose of this supplement is to provide additional information
regarding the Selling Securityholders. The Selling Securityholders in the table
below are identified by this supplement. The Notes beneficially owned by these
Selling Securityholders were previously listed in the Prospectus under the names
of the nominee or Depository Trust Company participant holding the Notes for the
benefit of the Selling Securityholders. The table has been prepared based upon
information furnished to the Company by or on behalf of the Selling
Securityholders identified therein.
<TABLE>
<CAPTION>
PRINCIPAL AMOUNT OF NOTES NUMBER OF
BENEFICIALLY OWNED PERCENTAGE CONVERSION SHARES PERCENTAGE
THAT MAY OF NOTES THAT MAY OF COMMON
NAME BE SOLD OUTSTANDING BE SOLD (1) STOCK OUTSTANDING (2)
- --------------------------- ------------------------------- -------------- ------------------ -----------------------
<S> <C> <C> <C> <C>
Forest Fulcrum Fund Ltd $ 215,000 * 6,286 *
Forest Fulcrum Fund LP $ 150,000 * 4,385 *
Lipper Convertibles, L.P. $5,250,000 4.2% 153,508 *
Lipper Offshore $ 500,000 * 14,619 *
Convertibles, L.P.
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>
* Less than 1%.
(1) Assumes conversion of the full amount of Notes held by such holder at the
current conversion rate of $34.20 in principal amount of Notes per share of
Common Stock. Under the terms of the Indenture, fractional shares will not
be issued upon conversion of the Notes; cash will be paid in lieu of
fractional shares, if any.
(2) Computed in accordance with Rule 13d-3(d)(i) promulgated under the Exchange
Act based upon the 24,617,217 shares of Common Stock outstanding as of
March 14, 1997, treating as outstanding the number of Conversion Shares
shown as being issuable upon the assumed conversion by the named holder of
the full amount of such holder's Notes but not assuming the conversion of
the Notes of any other holders.
Other than its ownership of the Company's securities, the foregoing Selling
Securityholder has not had any material relationship with the Company within the
past three years.
