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Filed pursuant to Rule 424(b)(3)
Registration No. 333-53457
SENSORMATIC ELECTRONICS CORPORATION
SUPPLEMENT NUMBER ONE 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"). 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 or issuable in payment
of dividends and certain premium payments with respect to the Preferred Stock.
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 is not being updated to show any sales
by any of them. 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 remains in full
force and effect.
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<CAPTION>
- ------------------------------------------------------------------ ----------------------------------------------------
Common Stock Depositary Shares
- ------------------------------------------------------------------ ----------------------------------------------------
Beneficially Beneficially
Beneficially Owned Owned
Owned Prior Offered After Beneficially Owned Offered After
Name of Selling to This for This Prior to This for This
Securityholder(1) Offering Sale Offering Offering Sale Offering
---------------------------------------------------------------- ----------------------------------------------------
No. of % of
No. of % of Depositary Depositary
Shares Shares Shares Shares
- ------------------------------------------------------------------------------------------------------------------------
<S> <C> <C> <C> <C> <C> <C> <C> <C>
AIG SoundShore Holdings
Ltd. (former SoundShore
Holdings, Ltd.) 156,062 * 156,062 0 75,500 1 75,500 0
Argent Classic
Convertible Arbitrage
Fund L.P. 191,091 * 191,091 0 145,000 2.1 145,000 0
Calamos Asset Management 27,674 * 27,674 0 21,000 * 21,000 0
Forest Fulcrum Fund L.P. 54,657 * 54,657 0 41,474 * 41,474 0
Forest Global
Convertible Fund Series A-5 62,632 * 62,632 0 47,526 * 47,526 0
Jefferies & Company,
Inc. 290,578 * 290,578 0 220,000 3.1 220,000 0
Prudential Securities 6,014 * 6,014 0 0 * 0 0
Reliant Trading 131,786 * 131,786 0 100,000 1.4 100,000 0
Shepherd Investments
International, Ltd. 2,351 * 2,351 0 0 * 0 0
Shepherd Trading Limited 197,680 * 192,110 0 150,000 2.1 150,000 0
Stark International 2,351 * 2,351 0 0 * 0 0
--------- --------- ------ ------- ------- ----
Total 1,122,876 * 1,117,306 61,410 800,500 11.6 800,500 0
========= ========= ====== ======= ======= ====
<CAPTION>
- ------------------------------------------------------------------------
6 1/2% Convertible Preferred Stock
- ------------------------------------------------------------------------
Beneficially
Owned
Beneficially Offered After
Name of Selling Owned Prior to for This
Securityholder(1) This Offering Sale Offering
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No. of
Shares of % of
Preferred Preferred
Stock Stock
- ------------------------------------------------------------------------
<S> <C> <C> <C> <C>
AIG SoundShore Holdings
Ltd. (former SoundShore
Holdings, Ltd.) 7,500 1 7,500 0
Argent Classic
Convertible Arbitrage
Fund L.P. 14,500 2.1 14,500 0
Calamos Asset Management 2,100 * 2,100 0
Forest Fulcrum Fund L.P. 4,147 * 4,147 0
Forest Global
Convertible Fund Series A-5 4,752 * 4,752 0
Jefferies & Company,
Inc. 22,000 3.1 22,000 0
Prudential Securities 0 * 0 0
Reliant Trading 10,000 1.4 10,000 0
Shepherd Investments
International, Ltd. 0 * 0 0
Shepherd Trading Limited 15,000 2.1 15,000 0
Stark International 0 * 0 0
------ ------ ----
Total 79,999 11.6 79,999 0
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THE DATE OF THIS SUPPLEMENT IS JANUARY 24, 2000
