PROSPECTUS SUPPLEMENT NO. 5
(To Prospectus dated February 9, 2001)

                           SPECTRASITE HOLDINGS, INC.
                    6 3/4% SENIOR CONVERTIBLE NOTES DUE 2010

         This prospectus  supplement no. 5 supplements and amends the prospectus
dated  February 9, 2001, as  supplemented  by prospectus  supplement no. 1 dated
February 20, 2001,  prospectus  supplement no. 2 dated March 7, 2001, prospectus
supplement  no. 3 dated March 15,  2001 and  prospectus  supplement  no. 4 dated
March  26,  2001,  relating  to  the  resale  of  SpectraSite's  6  3/4%  senior
convertible notes due 2010 and the shares of SpectraSite common stock, par value
$.001 per share, issuable upon conversion of the notes.

         The table and  footnotes on pages 35 through 38 of the  prospectus  set
forth information with respect to the selling holders and the respective amounts
of convertible notes held and shares of common stock  beneficially owned by each
selling holder that may be offered  pursuant to the prospectus,  as supplemented
and amended. This prospectus  supplement amends the table in the prospectus,  as
supplemented  and amended,  by (i) adding British Virgin Islands Social Security
Board, The Grable  Foundation and Merrill Lynch Insurance  Group,  (ii) removing
Castle  Convertible Fund, Inc. and (iii) replacing the information  contained in
the table for Alta Partners Holdings,  LDC, Amaranth  Securities L.L.C.,  Morgan
Stanley & Co.  Incorporated,  Paloma  Securities LLC and UBS O'Connor LLC F/B/O/
UBS Global Equity  Arbitrage  Master Ltd. and for the category "Any other holder
of notes or future transferee,  pledgee,  donee or successor of any holder" with
the corresponding information set forth below.


                                                                                                      

                                                                        Shares of
                                                                         Common
                                             Principal    Principal       Stock      Shares of     Shares of
                                              Amount      Amount of   Beneficially    Common     Common Stock
                                             of Notes    Notes Owned      Owned        Stock     Beneficially
                                             Owned and    After the     Prior to      Offered     Owned After
         Selling Securityholders              Offered     Offering      Offering      Hereby     the Offering
---------------------------------------      ---------   -----------  -------------  ---------  ---------------
Alta Partners Holdings, LDC............      4,000,000      none         185,508      185,508          none
Amaranth Securities L.L.C. ............        875,000      none          40,580       40,580          none
British Virgin Islands Social Security
  Board................................         49,000      none           2,273        2,273          none
Merrill Lynch Insurance Group..........        334,000      none          15,490       15,490          none
Morgan Stanley & Co. Incorporated (1)..      5,251,000      none       7,790,910      243,525     7,547,385
Paloma Securities LLC..................        875,000      none          44,580       40,580         4,000
The Grable Foundation..................        122,000      none           5,658        5,658          none
UBS O'Connor LLC F/B/O UBS Global
  Equity Arbitrage Master Ltd..........      2,000,000      none          92,754       92,754          none

Any other holder of notes or future
  transferee, pledgee, donee or
  successor of any holder..............     57,210,000      none       2,653,218    2,653,218          none

(footnote on following page)


     The prospectus,  together with this prospectus supplement no. 5, prospectus
supplement no. 4, prospectus  supplement no. 3, prospectus  supplement no. 2 and
prospectus supplement no. 1, constitutes the prospectus required to be delivered
by Section  5(b) of the  Securities  Act of 1933,  as amended,  with  respect to
offers and sales of the  convertible  notes and the common stock  issuable  upon
conversion of the convertible notes.

     Prospective  investors should carefully review "Risk Factors"  beginning on
page 5 of the  prospectus  for a discussion  of risks that should be  considered
when investing in the notes or our common stock.

     Neither the  Securities and Exchange  Commission  nor any state  securities
commission has approved or  disapproved  of these  securities or passed upon the
adequacy  or  accuracy  of  this  prospectus  or  any  accompanying   prospectus
supplement. Any representation to the contrary is a criminal offense.

               The date of this prospectus supplement is April 6, 2001.






(1)  Morgan  Stanley  &  Co.  Incorporated  was  the  placement  agent  for  the
     convertible  notes.  Morgan Stanley & Co.  Incorporated was also an initial
     purchaser or  placement  agent for  our 11 1/4% senior  discount  notes due
     2009,  our 12 7/8%  senior  discount  notes due 2010 and our 10 3/4% senior
     notes due 2010 and was  co-lead  underwriter  of our  public  common  stock
     offerings in February 2000 and July 2000.





















                                       2




    The following table sets forth, as of April 6, 2001,  information  regarding
the  beneficial  ownership  of the notes  and our  common  stock by the  selling
holders. The information is based on information provided by or on behalf of the
selling holders through April 6, 2001.

                                                                                                      


                                                                        Shares of
                                                                         Common
                                             Principal    Principal       Stock      Shares of     Shares of
                                              Amount      Amount of   Beneficially    Common     Common Stock
                                             of Notes    Notes Owned      Owned        Stock     Beneficially
                                             Owned and    After the     Prior to      Offered     Owned After
         Selling Securityholders            Offered(1)   Offering(2)    Offering   Hereby(3)(4) the Offering(2)
---------------------------------------     ----------   -----------  ------------ ------------ ----------------
AIG SoundShore Opportunity Holding Fund
  Ltd. ................................    $ 1,000,000      none          46,377       46,377          none
AIG SoundShore Strategic Holding Fund
  Ltd. ................................      5,000,000      none         231,885      231,885          none
Allstate Insurance Company.............        625,000      none          28,986       28,986          none
Allstate Life Insurance Company........         75,000      none           3,479        3,479          none
Alpine Associates......................      5,600,000      none         259,711      259,711          none
Alpine Partners, L.P. .................        900,000      none          41,740       41,740          none
Alta Partners Holdings, LDC............      4,000,000      none         185,508      185,508          none
Amaranth Securities L.L.C. ............        875,000      none          40,580       40,580          none
Bank America Pension Plan..............      4,000,000      none         185,508      185,508          none
British Virgin Islands Social Security
  Board................................         49,000      none           2,273        2,273          none
CIBC World Markets International
  Arbitrage (5)........................     12,000,000      none      10,556,522      556,522    10,000,000
DEAM Convertible Arbitrage Fund .......      2,000,000      none          92,754       92,754          none
Deephaven Domestic Convertible Trading
  Ltd. (6).............................      3,000,000      none         139,131      139,131          none
Deeprock & Co. ........................      2,500,000      none         115,943      115,943          none
Deutsche Banc Alex. Brown (7)..........     11,367,000      none       2,614,298      527,166     2,087,132
DIA High Yield Bond Fund (8)...........        250,000      none          11,595       11,595          none
Eaton Vance High Income Portfolio (9)..      2,860,000      none         132,638      132,638          none
Eaton Vance Income Fund of Boston (10).      1,540,000      none          71,421       71,421          none
First Union International Capital
 Markets...............................      5,000,000      none         231,885      231,885          none
Global Bermuda Limited Partnership.....      2,900,000      none         134,493      134,493          none
Hallmark Master Trust High Yield (11)..        250,000      none          11,595       11,595          none
JMG Capital Partners, LP...............      3,500,000      none         162,319      162,319          none
JMG Triton Offshore Fund, Ltd. ........      3,500,000      none         162,319      162,319          none
KBC Financial Products USA.............      2,100,000      none          97,392       97,392          none
Lakeshore International Ltd. ..........      4,100,000      none         190,145      190,145          none
Lancer Securities Cayman LTD...........      1,000,000      none          46,377       46,377          none
Lehman Brothers Inc. (12)..............      1,000,000      none          46,377       46,377          none
Lipper Convertibles, L.P. .............     11,367,000      none         527,166      527,166          none
Lipper Convertibles Series II, L.P. ...      2,000,000      none          92,754       92,754          none
Lipper Offshore Convertibles, L.P. ....      2,000,000      none          92,754       92,754          none
Lipper Offshore Convertibles, L.P. #2..      1,000,000      none          46,377       46,377          none
Merced Partners Limited Partnership....      5,000,000      none         231,885      231,885          none
Merrill Lynch Insurance Group..........        334,000      none          15,490       15,490          none
Morgan Stanley & Co. Incorporated (13).      5,251,000      none       7,790,910      243,525     7,547,385
Nomura Securities International, Inc. .      1,000,000      none          46,377       46,377          none
Paloma Securities LLC..................        875,000      none          44,580       40,580         4,000
Peoples Benefit Life Insurance
  Company..............................      4,000,000      none         185,508      185,508          none
Peoples Benefit Life Insurance Company
  TEAMSTERS............................      6,000,000      none         278,261      278,261          none
PGEP III LLC...........................        500,000      none          23,189       23,189          none
Quattro Fund, LLC......................      3,500,000      none         162,319      162,319          none
Retail Clerks Pension Trust............      2,500,000      none         115,943      115,943          none
Retail Clerks Pension Trust #2.........      1,500,000      none          69,566       69,566          none
St. Albans Partners Ltd................      4,000,000      none         185,508      185,508          none
TIAA-CREF Mutual Funds F/B/O its
  High Yield Bond Fund (14)............        250,000      none          11,595       11,595          none
TQA Master Plus Fund, LTD..............        500,000      none          23,189       23,189          none
TQA Master Fund, LTD...................      2,000,000      none          92,754       92,754          none
Teachers Insurance and Annuity
  Association..........................      6,000,000      none         278,261      278,261          none
The Grable Foundation..................        122,000      none           5,658        5,658          none
UBS O'Connor LLC F/B/O UBS Global
  Equity Arbitrage Master Ltd..........      2,000,000      none          92,754       92,754          none
Volkswagen of America Inc.--
  Salaried Eaton Vance Mgt. (15).......        100,000      none           4,638        4,638          none

Any other holder of notes or future
  transferee, pledgee, donee or
  successor of any holder (16).........     57,210,000      none       2,653,218    2,653,218          none
----------

                                       3



(1)  Assumes  that the full  amount of the notes held by the  selling  holder is
     being offered for registration hereunder.

(2)  Because the selling holders may,  pursuant to the prospectus,  offer all or
     some portion of the notes and shares they  presently  hold or, with respect
     to shares,  have the right to acquire  upon  conversion  of such notes,  we
     cannot  predict the amount or  percentage of the notes and shares that will
     be held by the  selling  holder  upon  termination  of any such  sales.  In
     addition,  the selling holders identified above may have sold,  transferred
     or  otherwise  disposed of all or a portion of their notes and shares since
     the date on which they provided the  information  regarding their notes and
     shares in  transactions  exempt from the  registration  requirements of the
     Securities  Act. See "Plan of  Distribution."  The selling holders may sell
     all, part or none of the notes or shares  listed in the table.  The amounts
     listed  in the  table  assume  that each  selling  holder  sells all of its
     convertible notes and/or shares of common stock underlying such notes.

(3)   Assumes  that the full amount of the notes held by the  selling  holder is
      converted into shares of common stock at the conversion  price and offered
      hereunder by such selling holder.

(4)   The conversion  price and the number of shares issuable upon conversion of
      the notes are  subject to  adjustment  under  certain  circumstances.  See
      "Description of Notes--Conversion of Notes." Section 15.3 of the indenture
      governing the convertible  notes provides that if any fractional shares of
      common  stock are  issuable  upon  conversion  of the notes,  Holdings may
      either pay cash in lieu of such  fractional  shares or round up the number
      of shares issuable upon  conversion.  The number of shares reported in the
      table  assumes that  Holdings  rounds up the number of shares  issued upon
      conversion.  We  expressly  reserve  the  right  to pay  cash  in  lieu of
      fractional shares, and any decision as to whether pay cash or round up for
      fractional  shares will be made at the time the notes are  surrendered for
      conversion.

(5)   CIBC World  Markets  International  Arbitrage  is an affiliate of Canadian
      Imperial  Bank  of  Commerce.   Of  the  10,556,522   shares  reported  as
      beneficially  owned  by  CIBC  World  Markets   International   Arbitrage,
      10,000,000  are held by other  affiliates  of  Canadian  Imperial  Bank of
      Commerce.  An affiliate of Canadian Imperial Bank of Commerce,  CIBC World
      Markets,  was an initial  purchaser or placement  agent for our 12% senior
      discount notes due 2008,  our 11 1/4% senior  discount notes due 2009, our
      12 7/8% senior  discount notes due 2010, our 10 3/4% senior notes due 2010
      and our 12 1/2%  senior  notes due 2010.  CIBC  World  Markets  was also a
      co-manager of our public common stock  offerings in February 2000 and July
      2000.  In addition,  CIBC World Markets is an agent and a lender under our
      credit facility.  CIBC World Markets and its affiliates received customary
      fees for these services.  The Trimaran group purchased 4,000,000 shares of
      our common stock in a private  placement at a purchase price of $18.75 per
      share and received  warrants to purchase  1,500,000 shares of common stock
      at  exercise  prices  ranging  from  $21.56 per share to $28.00 per share.
      Certain  investors  in the  Trimaran  group are  affiliates  of CIBC World
      Markets.  Andrew R. Heyer is a Managing Director of CIBC World Markets and
      a managing  member of Trimaran Fund  Management,  L.L.C.,  the  investment
      advisor to Trimaran  Fund II L.L.C.  Mr.  Heyer was a member of  Holdings'
      board of directors from April 1999 until November 2000. Our  stockholders'
      agreement,  as amended,  provides  that so long as the Trimaran  group and
      Canadian  Imperial Bank of Commerce and their  respective  affiliates  own
      collectively 5% or more of Holdings'  outstanding stock, Canadian Imperial
      Bank  of  Commerce  affiliates  and  Caravelle   Investment  Fund,  L.L.C.
      collectively  will have the right to designate a representative  to attend
      meetings of Holdings' board of directors as an observer.

(6)  Deephaven  Domestic  Convertible  Trading Ltd. owned  $2,000,000  aggregate
     principal amount of Holdings' 12 1/2% senior discount notes due 2010.

(7)  Deutsche Banc  Alex.Brown  was a co-lead  underwriter  of our public common
     stock  offering in July 2000 and a  co-manager  of our public  common stock
     offering in February 2000. Deutsche Banc was also a placement agent for our
     12 7/8%  senior  discount  notes due 2010 and our 10 3/4% senior  notes due
     2010.

(8)  DIA High Yield Bond Fund owned  $2,750,000  aggregate  principal  amount of
     Holdings' 11 1/4% senior discount notes due 2009.

(9)  Eaton Vance High Income  Portfolio  owned  $5,360,000  aggregate  principal
     amount of  Holdings'  12%  senior  discount  notes  due  2008,  $25,500,000
     aggregate  principal  amount of Holdings' 11 1/4% senior discount notes due
     2009 and $3,870,000  aggregate principal amount of Holdings' 12 7/8% senior
     discount notes due 2010.

                                       4


(10) Eaton Vance  Income Fund of Boston  owned  $1,150,000  aggregate  principal
     amount of  Holdings'  12%  senior  discount  notes  due  2008,  $12,235,000
     aggregate  principal  amount of Holdings' 11 1/4% senior discount notes due
     2009 and $4,080,000  aggregate principal amount of Holdings' 12 7/8% senior
     discount notes due 2010.

(11) Hallmark  Master  Trust High Yield owned  $1,550,000  of  Holdings' 11 1/4%
     senior discount notes due 2009.

(12) Lehman  Brothers Inc. was an initial  purchaser of our 12% senior  discount
     notes due 2008 and a co-manager  of our public  common  stock  offerings in
     February 2000 and July 2000.

(13) Morgan  Stanley  &  Co.  Incorporated  was  the  placement  agent  for  the
     convertible  notes.  Morgan Stanley & Co.  Incorporated was also an initial
     purchaser  or  placement  agent for our 11 1/4% senior  discount  notes due
     2009,  our 12 7/8%  senior  discount  notes due 2010 and our 10 3/4% senior
     notes due 2010 and was  co-lead  underwriter  of our  public  common  stock
     offerings in February 2000 and July 2000.

(14) TIAA-CREF  Mutual  Funds  F/B/O its High  Yield  Bond Fund  owned  $250,000
     aggregate  principal  amount of Holdings' 12 1/2% senior discount notes due
     2010.

(15) Volkswagen  of America  Inc.--Salaried  Eaton Vance Mgt.  owned  $15,000 of
     Holdings' 11 1/4% senior discount notes due 2009.

(16) We may from time to time include additional selling holders and information
     about such selling holders' plans of distribution in future  supplements to
     the prospectus,  if required.  The amounts provided assume that any holders
     of the notes, or any future transferees,  pledgees, donees or successors of
     or from any such other holders of notes, do not beneficially own any common
     stock other than the common stock issuable upon  conversion of the notes at
     the conversion rate.

                                       5