Filed
Pursuant to Rule 424(b)(3)
File
Number 333-115471
PROSPECTUS
SUPPLEMENT NO. 1
Prospectus
Supplement No. 1 dated August 11, 2005
to
Prospectus declared
effective
on July 6, 2005
(Registration
No. 333-115471)
CALLISTO
PHARMACEUTICALS, INC.
This
Prospectus Supplement No. 1 supplements our Prospectus dated July 6, 2005. The
shares that are the subject of the Prospectus have been registered to permit
their resale to the public by the selling stockholders named in the Prospectus.
We are not selling any shares of common stock in this offering and therefore
will not receive any proceeds from this offering. You should read this
Prospectus Supplement No. 1 together with the Prospectus.
The
table set forth in the section of the Prospectus entitled "Selling Stockholders"
is hereby updated to reflect the transfer of shares of common stock from
Greenberg Healthcare Partners LLC to The Pharmaceutical/Medical Technology Fund
LP. The selling stockholder may have sold, transferred or otherwise disposed of,
or may sell, transfer or otherwise dispose of, at any time or from time to time
since the dates on which it provided the information regarding the shares
beneficially owned by it, all or a portion of the shares beneficially owned by
it in transactions registered under other effective registration statements or
exempt from the registration requirements of the Securities Act.
| |
Prior
to the Offering |
|
|
After
the Offering |
|
Selling
Stockholder |
Number
of Shares |
Percent
of Shares Beneficially Owned |
Number
of Shares Already Sold in Offering |
Number
of Remaining Shares Offered |
Number
of Shares |
Percent
of Shares Beneficially Owned |
| The
Pharmaceutical/Medical Technology Fund LP |
444,444 |
1.4 |
— |
444,444 |
— |
— |
Our
common stock is listed on the American Stock Exchange under the symbol
“KAL.”
Neither
the Securities and Exchange Commission nor any state securities commission has
approved or disapproved of these securities or passed upon the accuracy or
adequacy of this Prospectus Supplement. Any representation to the contrary is a
criminal offense.
The
date of this Prospectus Supplement is August 11, 2005.