<PAGE> 1
Pursuant to Rule 424(b)(3)
Registration No. 333-53457
SENSORMATIC ELECTRONICS CORPORATION
SUPPLEMENT NUMBER TEN TO PROSPECTUS DATED DECEMBER 20, 1999
This Supplement is a part of the Prospectus dated December 20,
1999 relating to 6,900,000 Depositary Shares ("Depositary Shares"), each
representing a one-tenth interest in a share of 6 1/2% Convertible Preferred
Stock, par value $.01 per share ("Preferred Stock"), of Sensormatic Electronics
Corporation ("Sensormatic" or the "Company"). The Prospectus (as well as this
Supplement) also relates to 690,000 shares of the Preferred Stock and certain
shares of Common Stock, par value $.01 per share, of Sensormatic, issued upon
conversion of such Depositary Shares and/or Preferred Stock and issued or
issuable in payment of dividends and certain premium payments with respect to
the Preferred Stock. The Prospectus was previously supplemented by Supplement
Number One dated January 24, 2000, Supplement Number Two dated January 25, 2000,
Supplement Number Three dated February 15, 2000, Supplement Number Four dated
April 6, 2000, Supplement Number Five dated May 10, 2000, Supplement Number Six
dated May 30, 2000, Supplement Number Seven dated June 21, 2000, Supplement
Number Eight dated July 11, 2000 and Supplement Number Nine dated July 26, 2000.
Defined terms contained in this Supplement have the meanings assigned to them in
the Prospectus.
The following updates certain information concerning the
Selling Securityholders and the securities of Sensormatic held by them, as set
forth in the Prospectus under the caption "Selling Security Holders", based on
information received from the Selling Securityholders named below after the date
of the Prospectus and prior to the date hereof. The information concerning the
Selling Securityholders in the Prospectus (including any previous Supplement) is
not being updated to show sales, except to the extent that any such sales are
reflected in the current beneficial ownership information set forth below.
Except as amended or supplemented hereby or as contemplated by the preceding
sentence, the information in the Prospectus concerning the Selling
Securityholders and the securities of Sensormatic held by them, as previously
amended by any Supplements previously filed, remains in full force and effect.
<TABLE>
<CAPTION>
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Common Stock Depositary Shares 6 1/2% Convertible Preferred Stock
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Bene- Bene- Bene-
ficially ficially ficially
Owned Owned Owned
Beneficially After Beneficially Owned After Beneficially Offered After
Name of Selling Owned Prior to Offered This Prior to This Offered This Owned Prior to for This
Securityholder This Offering for Sale Offering Offering for Sale Offering This Offering Sale Offering
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No. of
Shares
No. of % of of % of
No. of % of Depositary Depositary Preferred Preferred
Shares Shares Shares Shares Stock Stock
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<S> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C> <C>
Bear Stearns &
Co. Inc.(1) 64,037 * 64,037 0 50,000 * 50,000 0 5,000 * 5,000 0
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Total 64,037 * 64,037 0 50,000 * 50,000 0 5,000 * 5,000 0
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</TABLE>
(1) Bear Stearns & Co., Inc. provides investment banking services to the
Company and was one of four initial purchasers in a private placement by
the Company of the securities. The securities held by Bear, Stearns & Co.,
Inc. were acquired from time to time after the initial placement of the
securities in its capacity as a broker dealer or market maker.
Additionally, Bear Stearns & Co., Inc. has acted as financial advisor in
connection with the sale of certain businesses of the Company.
THE DATE OF THIS SUPPLEMENT IS NOVEMBER 17, 2000
