UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 4 to SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 4)* Crown Castle International Corp. -------------------------------- (Name of Issuer) Common Stock, Par Value $0.01 Per Share --------------------------------------- (Title of Class of Securities) 228227104 -------------------------------- (CUSIP Number) Katherine Ashton Debevoise & Plimpton International Financial Centre Old Broad Street London EC2N 1HQ United Kingdom (011)(44)(207) 786-9000 ----------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) March 10 - March 17, 2000 ------------------------------------------------------------ (Date of Event which Requires Filing of this Statement) If the filing person has previously filed a statement on Schedule 13G to report the acquisition which is the subject of this Schedule 13D, and is filing this schedule because of (S)(S) 240.13d-1(3), 240.13d-1(f) or 240.13d-1(g), check the following box [_]. Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See (S) 240.13d-7(b) for other parties to whom copies are to be sent. * The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). (Continued on the following pages)

- ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Candover Investments plc - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* 2 (a) [_] (b) [x] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ SOURCE OF FUNDS 4 N.A. - ------------------------------------------------------------------------------ CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) [_] 5 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 6 England - ------------------------------------------------------------------------------ SOLE VOTING POWER 7 NUMBER OF 4,515,545 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 8 OWNED BY 0 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 9 REPORTING 4,515,545 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 10 0 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 11 41,829,037 (Includes all Shares beneficially owned by persons reporting on the Original Schedule 13D) - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES 12 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 13 27.18% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON 14 IV - ------------------------------------------------------------------------------ 2

- ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Candover (Trustees) Limited - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 2 (a) [_] (b) [x] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ SOURCE OF FUNDS 4 N.A. - ------------------------------------------------------------------------------ CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) [_] 5 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 6 England - ------------------------------------------------------------------------------ SOLE VOTING POWER 7 NUMBER OF 82,929 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 8 OWNED BY 0 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 9 REPORTING 82,929 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 10 0 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 11 41,829,037 (Includes all Shares beneficially owned by persons reporting on the Original Schedule 13D) - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES 12 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 13 27.18% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON 14 IV - ------------------------------------------------------------------------------ 3

- ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Candover Partners Limited (as general partner of the Candover 1994 UK Limited Partnership, the Candover 1994 UK No. 2 Limited Partnership, the Candover 1994 US No. 1 Limited Partnership and the Candover 1994 US No. 2 Limited Partnership) - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 2 (a) [_] (b) [x] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ SOURCE OF FUNDS 4 N.A. - ------------------------------------------------------------------------------ CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) [_] 5 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 6 England - ------------------------------------------------------------------------------ SOLE VOTING POWER 7 NUMBER OF 3,504,394 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 8 OWNED BY 0 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 9 REPORTING 3,504,394 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 10 0 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 11 41,829,037 (Includes all Shares beneficially owned by persons reporting on the Original Schedule 13D) - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES 12 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 13 27.18% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON 14 IV - ------------------------------------------------------------------------------ 4

- ------------------------------------------------------------------------------ NAME OF REPORTING PERSON 1 S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Candover Services Limited - ------------------------------------------------------------------------------ CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP 2 (a) [_] (b) [x] - ------------------------------------------------------------------------------ SEC USE ONLY 3 - ------------------------------------------------------------------------------ SOURCE OF FUNDS 4 N.A. - ------------------------------------------------------------------------------ CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e) [_] 5 - ------------------------------------------------------------------------------ CITIZENSHIP OR PLACE OF ORGANIZATION 6 England - ------------------------------------------------------------------------------ SOLE VOTING POWER 7 NUMBER OF 3,504,394 SHARES ----------------------------------------------------------- SHARED VOTING POWER BENEFICIALLY 8 OWNED BY 0 ----------------------------------------------------------- EACH SOLE DISPOSITIVE POWER 9 REPORTING 3,504,394 PERSON ----------------------------------------------------------- SHARED DISPOSITIVE POWER WITH 10 0 - ------------------------------------------------------------------------------ AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 11 41,829,037 (Includes all Sharees beneficially owned by persons reporting on the Original Schedule 13D) - ------------------------------------------------------------------------------ CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES 12 [_] - ------------------------------------------------------------------------------ PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 13 27.18% - ------------------------------------------------------------------------------ TYPE OF REPORTING PERSON 14 IV - ------------------------------------------------------------------------------ 5

Amendment No. 4 to a Statement on Schedule 13D This Amendment No. 4 amends the Statement on Schedule 13D relating to the common stock, par value $.01 per share (the "Shares"), of Crown Castle ------ International Corp., a Delaware corporation (the "Company") filed with the ------- Securities and Exchange Commission (the "Commission") on September 1, 1998 (the ---------- "Original Schedule 13D"), as previously amended by Amendment No. 1 to Schedule --------------------- 13D, filed with the Commission on November 9, 1999, Amendment No. 2 to Schedule 13D, filed with the Commission on December 22, 1999 and Amendment No. 3 to Schedule 13D, filed with the Commission on February 10, 2000. This Statement is being filed on behalf of the reporting persons (each a "Candover Reporting ------------------ Person," and collectively the "Candover Reporting Persons") identified on the - ------ -------------------------- cover pages of this Amendment No. 4. Information in respect of each Candover Reporting Person is given solely by such Candover Reporting Person and no Candover Reporting Person has responsibility for the accuracy or completeness of information supplied by any other Candover Reporting Person. Item 1. Security and Issuer. This Item is not amended. Item 2. Identity and Background. This Item is not amended.

Item 3. Source and Amount of Funds or Other Consideration. This Item is supplemented as follows: Over the period from March 10, 2000 to March 17, 2000, the Candover Reporting Persons sold 1,000,000 Shares in the aggregate pursuant to Rule 144 under the Securities Act of 1933, as amended. The number of Shares sold on behalf of each Candover Reporting Person is set forth in the following table: Seller Number of Shares Sold ------ --------------------- Candover Investments plc 205,600 ("Candover Investments") -------------------- Candover Partners Limited 406,100 ("Candover Partners") ----------------- (as general partner of the Candover 1994 UK Limited Partnership) Candover Partners 110,000 (as general partner of the Candover 1994 UK No.2 Limited Partnership) Candover Partners 19,700 (as general partner of the Candover 1994 US No.1 Limited Partnership) Candover Partners 240,200 (as general partner of the Candover 1994 US No.2 Limited Partnership) Candover (Trustees) Limited 18,400 ("Candover Trustees") ----------------- More detailed information relating to such sales, including the average daily sale price and the number of Shares sold on a daily basis, is attached as Schedule A hereto, which schedule is hereby incorporated into this Item 3 by reference in its entirety. Form 144 notices relating to such sales were filed with the Commission on March 10, 2000. See Exhibits 1 through 6 hereto. Sales were made on Nasdaq through Lehman Brothers, Inc. ("Lehman Brothers"), a registered broker under the --------------- Securities Exchange Act of 1934, as amended (the "Exchange Act"). ------------ Such sales were also reported on a Form 4, filed with 7

the Commission on April 7, 2000. See Exhibit 7 hereto. Item 4. Purpose of Transaction. This Item is supplemented as follows: The purposes of the sales by the Candover Reporting Persons described in Item 3 above were to diversify the equity holdings of the Candover Reporting Persons and to realize part of the value of the investment in the Shares for the benefit of the investors in the partnerships on whose behalf Candover Partners made sales. Additional sales may be made in the future for such purposes or for other purposes. Although each of the Candover Reporting Persons believes that the Shares that it beneficially owns are an attractive investment, each of the Candover Reporting Persons on an individual basis continues to monitor and evaluate its investment in the Company in light of pertinent factors, including without limitation the following: (i) the Company's business, operations, - assets, financial condition and prospects; (ii) market, general economic and -- other conditions; and (iii) other investment opportunities available to one or --- more of the Candover Reporting Persons. Candover Partners also monitors and evaluates the Shares it holds in light of its obligations as the general partner of the Candover 1994 UK Limited Partnership, the Candover 1994 UK No.2 Limited Partnership, the Candover 1994 US No.1 Limited Partnership and the Candover 1994 US No.2 Limited Partnership (collectively the "Candover Partnerships"). --------------------- Candover Trustees also monitors and evaluates the Shares it holds in light of its obligations as the trustee of the Candover Staff Co-Investment Scheme. In light of the foregoing factors, and the plans and requirements of the Candover Reporting Persons from time to time, some or all of the Candover Reporting Persons may decide to: (i) dispose of some or all of the securities of - the Company which they beneficially own; or (ii) acquire additional securities -- of the Company. The Candover Reporting Persons reserve the right, either individually or in any combination among themselves or together with one or more stockholders of the Company, to decide in the future to take or cause to be taken one or more of the foregoing actions. There can be no assurance that any of the foregoing transactions will occur or as to the timing of any such transactions. Except as set forth above, none of the Candover Reporting Persons has plans or proposals with respect to any of the matters set forth in paragraphs (a) through (j) of Item 4 of Schedule 13D. The Candover Reporting Persons disclaim that they are part of a group (as such term is set forth in Rule 13(d) under the Exchange Act). Additionally, each Candover Reporting Person disclaims beneficial ownership of all Shares which are not directly owned of record by such Candover Reporting Person. 8

Item 5. Interest in Securities of the Issuer. This Item is supplemented and amended as follows: In accordance with Rule 13d-5(b)(1) under the Exchange Act and by virtue of the Stockholders Agreement discussed in Item 6 of the Original Schedule 13D (subject to the disclaimer in Item 4 of the Original Schedule 13D, Amendment No.1 thereto, Amendment No.2 thereto, Amendment No. 3 thereto and this Amendment No.4), each of the Candover Reporting Persons may be deemed to own 41,829,037 Shares, which constitute approximately 27.18% of the 153,882,158 Shares deemed outstanding as of April 7, 2000. The amount deemed owned constitutes the number of Shares in which the reporting persons that filed the Original Schedule 13D are interested or deemed interested. The information contained in Item 3 of this Amendment No. 4 is hereby incorporated into this Item 5 by reference in its entirety. Candover Investments plc - ------------------------ Candover Investments has sole voting power with respect to 4,515,545 Shares and has sole dispositive power with respect to 4,515,545 Shares. Candover Investments is the direct beneficial owner of 928,222 Shares over which it has sole voting and dispositive power. By virtue of the relationships reported under Item 2 of the Original Schedule 13D, as amended by Amendment No.1 thereto, Candover Investments may be deemed to have indirect beneficial ownership of the Shares beneficially owned by Candover Trustees and Candover Partners. Candover (Trustees) Limited - --------------------------- Candover Trustees has sole voting power with respect to 82,929 Shares and has sole dispositive power with respect to 82,929 Shares. Candover Trustees is the direct beneficial owner of 82,929 Shares over which it has sole voting and dispositive power. Candover Partners Limited (as general partner of the Candover 1994 UK Limited - ----------------------------------------------------------------------------- Partnership, the Candover 1994 UK No.2 Limited Partnership, the Candover 1994 US - -------------------------------------------------------------------------------- No.1 Limited Partnership and the Candover 1994 US No.2 Limited Partnership). - --------------------------------------------------------------------------- Candover Partners has sole voting power with respect to 3,504,394 Shares and has sole dispositive power with respect to 3,504,394 Shares. Candover Partners is the direct beneficial owner of 3,504,394 Shares over which it has sole voting and dispositive power. Candover Services Limited - ------------------------- Candover Services has sole voting power with respect to 3,504,394 Shares and has sole dispositive power with respect to 3,504,394 Shares. By virtue of the relationships reported under Item 2 9

of the Original Schedule 13D, as amended by Amendment No. 1 thereto, Candover Services may be deemed to have indirect beneficial ownership of the Shares beneficially owned by Candover Partners. Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer This Item is not amended. Item 7. Material to Be Filed as Exhibits. Exhibit 1 Form 144 filed with the Commission on March 10, 2000 by Candover Partners as general partner of the Candover 1994 UK Limited Partnership. Exhibit 2 Form 144 filed with the Commission on March 10, 2000 by Candover Partners as general partner of the Candover 1994 UK No.2 Limited Partnership. Exhibit 3 Form 144 filed with the Commission on March 10, 2000 by Candover Partners as general partner of the Candover 1994 US No.1 Limited Partnership. 10

Exhibit 4 Form 144 filed with the Commission on March 10, 2000 by Candover Partners as general partner of the Candover 1994 US No.2 Limited Partnership. Exhibit 5 Form 144 filed with the Commission on March 10, 2000 by Candover Trustees. Exhibit 6 Form 144 filed with the Commission on March 10, 2000 by Candover Investments. Exhibit 7 Form 4 filed with the Commission on April 7, 2000 by Candover Investments, Candover Partners, Candover Partners as general partner of the Candover Partnerships, Candover Trustees and Candover Services. 11

Exhibit 8 Joint Filing Agreement, dated April 13, 2000, among Candover Investments plc, Candover (Trustees) Limited, Candover Partners Limited and Candover Services Limited. 12

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: April 13, 2000 CANDOVER INVESTMENTS PLC By: /s/ P.R. Neal ---------------------------------- Name: P.R. Neal Title: Company Secretary

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: April 13, 2000 CANDOVER (TRUSTEES) LIMITED By: /s/ P.R. Neal ---------------------------- Name: P.R. Neal Title: Company Secretary

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: April 13, 2000 CANDOVER PARTNERS LIMITED (as general partner of the Candover 1994 UK Limited Partnership, the Candover 1994 UK No. 2 Limited Partnership, the Candover 1994 US No. 1 Limited Partnership and the Candover 1994 US No. 2 Limited Partnership) By: /s/ P.R. Neal ----------------------------------- Name: P.R. Neal Title: Company Secretary

SIGNATURE After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: April 13, 2000 CANDOVER SERVICES LIMITED By:/s/ P.R. Neal --------------------------------- Name: P.R. Neal Ttile: Company Secretary

================================================================================================== CCIC Sale Programme-1999(5) - --------------------------- ================================================================================================== Candover Investments plc ------------------------ Date Sale No. of price Shares Gross SEC Net per share Sold Proceeds Fee Amount US$ US$ US$ US$ ================================================================================================== 10/03/2000 41.0094 109,996 4,510,869.96 - 150.36 4,510,719.60 13/03/2000 41.0263 78,128 3,205,302.77 - 106.84 3,205,195.93 15/03/2000 40.1250 5,140 206,242.50 - 6.87 206,235.63 16/03/2000 40.0313 8,224 329,217.41 - 10.97 329,206.44 17/03/2000 40.5000 4,112 166,536.00 - 5.55 166,530.45 - - - - shrs in sale program 205,600 ----------- shrs left to go - ----------- ------------------------------------------------------------------------- Sales:- 205,600 8,418,168.64 - - 280.59 8,417,888.05 ================================================================================================== Original Holding 2,329,318 Previous Sales - 1,195,496 25,605,413.32 - 834.54 25,604,559.78 ========================================================================= Holding (11/01/2000) 1,133,822 ========================================================================= Total Sales 1,401,096 34,022,447.83 No. of shares held ------------------------------------------------------------------------- after sales:- 928,222 ================================================================================================== ================================================================================================== ======================================================================================================================== Candover Trustees Ltd --------------------- Date No. of No. of Shares Gross SEC Net Shares Sold Proceeds Fee Amount Sold US$ US$ US$ ======================================================================================================================== 10/03/2000 9,844 403,696.53 - 13.46 403,683.07 217,263 13/03/2000 6,992 286,855.89 - 9.56 286,846.33 154,318 15/03/2000 460 18,457.50 - 0.62 18,456.88 10,153 16/03/2000 736 29,463.04 - 0.98 29,462.06 16,244 17/03/2000 368 14,904.00 - 0.50 14,903.50 8,122 - - - - shrs in sale program 18,400 406,100 ------------ ------------ shrs left to go - - ------------ ------------ ----------------------------------------------------------------------------------------------- Sales:- 18,400 753,376.96 - - 25.12 753,351.84 406,100 ======================================================================================================================= Original Holding 208,317 4,600,805 Previous Sales - 106,988 2,291,497.75 - 76.39 2,291,421.36 - 2,361,331 =============================================================================================== Holding (11/01/2000) 101,329 2,239,474 =============================================================================================== Total Sales 125,388 3,044,773.20 2,767,431 No. of shares held ----------------------------------------------------------------------------------------------- after sales:- 82,929 1,833,374 ======================================================================================================================= ======================================================================================================================= Note - Broker's commission of US$ 0.0625 is taken from the spread. ie.- the price quoted is after taking out commisssion.

- ------------------------------------------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------------------------------------------ 1994 UK L.P. 1994 UK. No.2 L.P. 1994 US. No.1 L.P. - ------------ ------------------ ------------------ No. of No. of Gross SEC Net Shares Gross SEC Net Shares Gross Proceeds Fee Amount Sold Proceeds Fee Amount Sold Proceeds US$ US$ US$ US$ US$ US$ US$ - ------------------------------------------------------------------------------------------------------------------------------------ 8,909,825.27 - 296.99 8,909,528.28 58,850 2,413,403.19 - 80.45 2,413,322.74 10,540 432,239.08 6,331,096.56 - 211.04 6,330,885.52 41,800 1,714,899.34 - 57.16 1,714,842.18 7,486 307,122.88 407,389.13 - 13.58 407,375.55 2,750 110,343.75 - 3.68 110,340.07 492 19,741.50 650,268.44 - 21.68 650,246.76 4,400 176,137.72 - 5.87 176,131.85 788 31,544.66 328,941.00 - 10.96 328,930.04 2,200 89,100.00 - 2.97 89,097.03 394 15,957.00 - - - - - - - - - - 110,000 19,700 ------- ------ - - ------- ------ - ------------------------------------------------------------------------------------------------------------------------------------ 16,627,520.40 - 554.25 16,626,966.15 110,000 4,503,884.00 - 150.13 4,503,739.87 19,700 806,605.12 - ==================================================================================================================================== 1,246,810 223,305 50,575,555.07 - 1,686.13 50,573,868.94 639,612 12,564,989.48 - 456.56 12,564,532.82 -114,548 2,453,421.11 ==================================================================================================================================== 607,198 108,757 - ------------------------------------------------------------------------------------------------------------------------------------ 67,200,835.09 749,612 17,068,266.69 134,248 - ------------------------------------------------------------------------------------------------------------------------------------ 497,198 89,057 ==================================================================================================================================== - ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------- - ------------------------------------------------------------------------------------------------------------------------------- 1994 US. No.2 L.P. ------------------ No. of SEC Net Shares Gross SEC Net Fee Amount Sold Proceeds Fee Amount US$ US$ US$ US$ US$ - ------------------------------------------------------------------------------------------------------------------------------- - 14.41 432,224.67 128,507 5,269,994.97 - 175.67 5,269,819.30 - 10.24 307,112.64 91,276 3,744,716.56 - 124.82 3,744,591.74 - 0.66 19,740.84 6,005 240,950.63 - 8.03 240,942.60 - 1.05 31,543.61 9,608 384,620.73 - 12.82 384,607.91 - 0.53 15,956.47 4,804 194,562.00 - 6.49 194,555.51 - - - - - - 240,200 --------- - --------- - ------------------------------------------------------------------------------------------------------------------------------- - 26.89 806,578.23 240,200 9,834,844.88 - - 327.83 9,834,517.05 =============================================================================================================================== 2,721,645 - 81.77 2,453,339.34 - 1,396,680 29,914,430.81 - 998.36 29,913,432.45 =============================================================================================================================== 1,324,965 - ------------------------------------------------------------------------------------------------------------------------------- 3,259,917.57 1,636,880 39,747,949.50 - ------------------------------------------------------------------------------------------------------------------------------- 1,084,765 =============================================================================================================================== - ------------------------------------------------------------------------------------------------------------------------------- - ---------------------------------------------------------------------------------------------- - ---------------------------------------------------------------------------------------------- TOTALS ------ No. of Shares Gross SEC Net Sold Proceeds Fee Amount US$ US$ US$ - ---------------------------------------------------------------------------------------------- 535,000 21,940,029.00 - 731.34 21,939,297.66 380,000 15,589,994.00 - 519.66 15,589,474.34 25,000 1,003,125.00 - 33.44 1,003,091.56 40,000 1,601,252.00 - 53.37 1,601,198.63 20,000 810,000.00 - 27.00 809,973.00 - - - - - - - - 1,000,000 --------- - --------- - ---------------------------------------------------------------------------------------------- 1,000,000 40,944,400.00 - - 1,364.81 40,943,035.19 ============================================================================================== 11,330,200 5,814,655 123,405,307.54 - 2,451.11 123,402,856.43 ============================================================================================== 5,515,545 - ---------------------------------------------------------------------------------------------- 6,814,655 164,345,891.62 - ---------------------------------------------------------------------------------------------- 4,515,545 ============================================================================================== Average price per share = US$ 24.12 ----------------------------- - ----------------------------------------------------------------------------------------------

EXHIBIT INDEX ------------- Exhibit No. Description - ----------- ----------- 1 Form 144 filed with the Commission on March 10, 2000 by Candover Partners as general partner of the Candover 1994 UK Limited Partnership is incorporated herein by reference. 2 Form 144 filed with the Commission on March 10, 2000 by Candover Partners as general partner of the Candover 1994 UK No.2 Limited Partnership is incorporated herein by reference. 3 Form 144 filed with the Commission on March 10, 2000 by Candover Partners as general partner of the Candover 1994 US No.1 Limited Partnership is incorporated herein by reference. 4 Form 144 filed with the Commission on March 10, 2000 by Candover Partners as general partner of the Candover 1994 US No.2 Limited Partnership is incorporated herein by reference. 5 Form 144 filed with the Commission on March 10, 2000 by Candover Trustees is incorporated herein by reference. 6 Form 144 filed with the Commission on March 10, 2000 by Candover Investments is incorporated herein by reference.

7 Form 4 filed with the Commission on April 7, 2000 by Candover Investments, Candover Partners, Candover Partners as general partner of the Candover Partnerships, Candover Trustees and Candover Services is incorporated herein by reference. 8 Joint Filing Agreement, dated April 13, 2000, among Candover Investments plc, Candover (Trustees) Limited, Candover Partners Limited and Candover Services Limited.

Exhibit 8 --------- Joint Filing Agreement ---------------------- In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the undersigned hereby (i) agree to the joint filing with all other Candover Reporting Persons (as such term is defined in the amendment to the statement on Schedule 13D described below) on behalf of each of them of an amendment to a statement on Schedule 13D with respect to the common stock, par value $.01 per share, of Crown Castle International Corp. and (ii) agree that this Agreement be included as an Exhibit to such joint filing. This Agreement may be executed in any number of counterparts all of which taken together shall constitute one and the same instrument. IN WITNESS WHEREOF, the undersigned, being duly authorized, hereby executes this Agreement this 13th day of April, 2000. CANDOVER INVESTMENTS PLC By: /s/ P. R. Neal ------------------------------ Name: P. R. Neal Title: Company Secretary CANDOVER (TRUSTEES) LIMITED By: /s/ P. R. Neal ------------------------------ Name: P. R. Neal Title: Company Secretary CANDOVER PARTNERS LIMITED (as general partner of the Candover 1994 UK Limited Partnership, the Candover 1994 UK No.2 Limited Partnership, the Candover 1994 US No.1 Limited Partnership and the Candover 1994 US No.2 Limited Partnership) By: /s/ P. R. Neal ------------------------------ Name: P. R. Neal Title: Company Secretary CANDOVER SERVICES LIMITED By: /s/ P. R. Neal ------------------------------ Name: P. R. Neal Title: Company Secretary