<PAGE>
Filed Pursuant to Rule 424(b)(3)
Registration No. 333-44347
SONIC SOLUTIONS
PROSPECTUS SUPPLEMENT NO. 3
On March 19, 1998, the Company issued to the Selling Stockholders an
aggregate of 306,952 shares of Common Stock from the Company in connection
with a Private Equity Line of Credit Agreement dated as of December 31, 1997
among the Company and Kingsbridge Capital Limited (one of the Selling
Stockholders) (the "Investment Agreement"). The attached Prospectus dated
January 30, 1998 (the "Prospectus"), relates to the resale of such shares.
Also attached are the previous prospectus supplements to the Prospectus dated
February 9, 1998 and February 26, 1998, respectively. See "Selling
Stockholders" in the Prospectus which is hereby updated by this Prospectus
Supplement, as follows:
SELLING STOCKHOLDERS
The following table sets forth certain information regarding beneficial
ownership of the Company's Common Stock by the Selling Stockholders as of
March 19, 1998. Because the Selling Stockholders may sell some or all of the
shares offered hereby, and because there are currently no agreements,
arrangements or understandings with respect to the sale of any of such shares,
no estimate can be given as to the actual amount of such shares that will be
held by the Selling Stockholders after completion of such distribution. See
"Plan of Distribution" in the Prospectus.
<TABLE>
<CAPTION>
COMMON STOCK
BENEFICIALLY OWNED COMMON STOCK
PRIOR TO BENEFICIALLY OWNED
OFFERING(1) COMMON AFTER OFFERING
--------------------- STOCK ---------------------
NUMBER PERCENT TO BE SOLD NUMBER PERCENT
----------- --------- ---------- --------- ---------
<S> <C> <C> <C> <C> <C>
Kingsbridge Capital 294,952 3.6 294,952 0 0
Limited................
c/o Kingsbridge Capital
Limited
Main Street, Kilcullen,
County
Kildare, Republic of
Ireland
Gene Jung............... 9,700 * 9,700 0 0
c/o Trinity Capital Ad-
visors, Inc.
369 Pine Street, Suite
310
San Francisco, CA 94104
David Cheng............. 1,200 * 1,200 0 0
c/o Trinity Capital Ad-
visors, Inc.
369 Pine Street, Suite
310
San Francisco, CA 94104
Phil Bader.............. 600 * 600 0 0
c/o Trinity Capital Ad-
visors, Inc.
369 Pine Street, Suite
310
San Francisco, CA 94104
Margaret Mahon.......... 500 * 500 0 0
c/o Trinity Capital Ad-
visors, Inc.
369 Pine Street, Suite
310
San Francisco, CA 94104
TOTAL:.............. 306,952 306,952 0 0
</TABLE>
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* Less than 1% of the shares of Common Stock outstanding as of March 18,
1998.
(1) Applicable percentage of ownership is based on shares of Common Stock
outstanding as of March 18, 1998.
The Shares offered hereby by the Selling Stockholders have been acquired in
connection with the Investment Agreement. In connection with the Investment
Agreement, the Selling Stockholders represented to the Company that it was
acquiring the Shares from the Company without any present intention of
effecting a distribution of those shares. However, in connection with the
Investment Agreement, the Company agreed to register the Shares for resale by
the Selling Stockholders to permit such resales from time to time in the
market or in privately-negotiated transactions. The Company will prepare and
file such amendments and supplements to the registration statement as may be
necessary in accordance with the rules and regulations of the Securities Act
to keep it effective for a period of approximately two years.
The Company has agreed to bear certain expenses (other than broker discounts
and commissions, if any) in connection with the registration statement.
----------------
THE DATE OF THIS PROSPECTUS SUPPLEMENT IS MARCH 19, 1998
