<PAGE>
FILED PURSUANT TO RULE 424(b)(3) AND (c)
FILE NUMBER 333-29933
PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED JULY 23, 1997
1,794,563 SHARES
NETSCAPE COMMUNICATIONS CORPORATION
COMMON STOCK
------------------
This Prospectus Supplement supplements the Prospectus dated July 23, 1997
(the "Prospectus") of Netscape Communications Corporation ("Netscape" or the
"Company") relating to the public offering, which is not being underwritten, and
sale of up to 1,794,563 shares of Common Stock, par value $0.0001 per share (the
"Shares"), of the Company, which may be offered and sold from time to time by
certain stockholders of the Company or by pledgees, donees, transferees or other
successors in interest that receive such shares as a gift, partnership
distribution or other non-sale related transfer (the "Selling Stockholders").
The Company will receive no part of the proceeds of such sales. All of the
Shares were originally issued by the Company in connection with the Company's
acquisitions of (i) Portola Communications, Inc., a California corporation
("Portola"), by and through a merger of a wholly-owned subsidiary of Netscape
("PCI Sub") with and into Portola and (ii) DigitalStyle Corporation, a Delaware
corporation ("DigitalStyle"), by and through a merger of a wholly-owned
subsidiary of Netscape ("DSC Sub") with and into DigitalStyle. The "Selling
Stockholders" section of the Prospectus is hereby supplemented to reflect the
distribution by Asset Management Associates 1996, L.P. ("Asset Management") of
314,436 Shares to its limited partners after the date of the Prospectus. This
Prospectus Supplement should be read in conjunction with the Prospectus, and
this Prospectus Supplement is qualified by reference to the Prospectus except to
the extent that the information herein contained supersedes the information
contained in the Prospectus. Capitalized terms used in this Prospectus
Supplement and not otherwise defined herein have the meanings specified in the
Prospectus.
------------------------
THE DATE OF THIS PROSPECTUS SUPPLEMENT IS JULY 31, 1997
<PAGE>
SELLING STOCKHOLDERS
All but two of the Shares beneficially owned by Asset Management and
reflected in the Prospectus were distributed to the limited partners of Asset
Management on July 24, 1997. The table of Selling Stockholders in the Prospectus
is hereby amended to reflect such distribution by Asset Management and
supplemented to specifically include the entities and individuals who received
such distribution. The following table sets forth as of July 30, 1997, the
number of Shares owned beneficially by Asset Management and the name of each of
the entities and individuals of the Company who received Shares through the
distribution by Asset Management who were not specifically identified in the
Prospectus as Selling Stockholders, and the number of shares of Common Stock
that each such Selling Stockholder beneficially owns as of such date, the number
of shares of Common Stock beneficially owned by each such Selling Stockholder
that may be offered for sale from time to time by the Prospectus and this
Prospectus Supplement, the number of shares of Common Stock to be beneficially
owned by each such Selling Stockholder assuming the sale of all of the Shares
offered by such Selling Stockholders and the percentage of the outstanding
shares of the Company's Common Stock to be beneficially owned by each such
Selling Stockholder after completion of the offering. Except as indicated, none
of such Selling Stockholders has held any position or office or had a material
relationship with the Company or any of its affiliates within the past three
years other than as a result of the ownership of the Company's Common Stock.
Except as set forth in this Prospectus Supplement with respect to Asset
Management and the distribution to its limited partners, there is no change to
the section entitled "Selling Stockholders" in the Prospectus. The Company may
amend or supplement the Prospectus and this Prospectus Supplement from time to
time to update the disclosure set forth therein and herein.
<TABLE>
<CAPTION>
SHARES BENEFICIALLY
SHARES WHICH MAY OWNED
SHARES BE SOLD PURSUANT AFTER OFFERING(3)
BENEFICIALLY TO ------------------------
SELLING STOCKHOLDER OWNED(1) THIS PROSPECTUS(2) NUMBER PERCENT
- ---------------------------------------------------------- ----------- ------------------ ---------- ------------
<S> <C> <C> <C> <C>
Asset Management Associates 1996, L.P..................... 2 2 -- --
1990 Bay Associates....................................... 873 873 -- --
Old Westbury Venture Capital Fund......................... 27,950 27,950 -- --
The University of Chicago................................. 15,528 15,528 -- --
University of Virginia.................................... 15,528 15,528 -- --
Co-operative Insurance Society............................ 15,528 15,528 -- --
Computrol, Ltd............................................ 7,764 7,764 -- --
GC&H Investments.......................................... 1,417 1,417 -- --
J.P. Cullen Limited Partnership........................... 854 854 -- --
Sam Eletr................................................. 1,941 1,941 -- --
The Finnane Living Trust, U/A 9/21/87..................... 854 854 -- --
Fitzgerald Trust, Dated 3/8/94............................ 854 854 -- --
The William and Flora Hewlett Foundation.................. 31,055 31,055 -- --
Charles T. Horngren and Joan E. Horngren Trustees U/T/A
dated Oct 20, 1993...................................... 1,165 1,165 -- --
J.F. Shea Co., Inc. as Nominee 1996-20.................... 3,882 3,882 -- --
Jadobe Investments, LLC................................... 2,911 2,911 -- --
The Henry J. Kaiser Family Foundation..................... 7,764 7,764 -- --
Kemper Technology Fund.................................... 7,764 7,764 -- --
Tom Klein................................................. 388 388 -- --
Knightsbridge Associated Investors IX, LP................. 7,764 7,764 -- --
Trustees of the Lawrenceville School...................... 11,646 11,646 -- --
Lumbermens Mutual Casualty Company........................ 3,882 3,882 -- --
Manian Revocable Living Trust............................. 3,882 3,882 -- --
</TABLE>
2
<PAGE>
<TABLE>
<CAPTION>
SHARES BENEFICIALLY
SHARES WHICH MAY OWNED
SHARES BE SOLD PURSUANT AFTER OFFERING(3)
BENEFICIALLY TO ------------------------
SELLING STOCKHOLDER OWNED(1) THIS PROSPECTUS(2) NUMBER PERCENT
- ---------------------------------------------------------- ----------- ------------------ ---------- ------------
<S> <C> <C> <C> <C>
Mayo Foundation Pension Plan.............................. 19,410 19,410 -- --
The Phillip W. Moffitt Revocable Trust dated 2/19/93...... 1,941 1,941 -- --
Moshe Alafi, Trustee, Christopher Alafi, Trustor,
U/T/A dated 1/25/85..................................... 1,941 1,941 -- --
Moshe Alafi, Trustee, Shireen Alafi, Trustor,
U/T/A dated 1/25/85..................................... 1,941 1,941 -- --
Needham & Company, Inc.................................... 1,941 1,941 -- --
George Needham............................................ 970 970 -- --
NLTC-96 Partners.......................................... 2,213 2,213 -- --
PCM Partners.............................................. 1,165 1,165 -- --
Lauer & Co. Agent for: The Pew Memorial Trust............. 13,587 13,587 -- --
Lauer & Co. Agent for: J.H. Pew Freedom Trust............. 2,717 2,717 -- --
Lauer & Co. Agent for: J.N. Pew, Jr. Trust................ 1,359 1,359 -- --
Lauer & Co. Agent for: Mabel Pew Myrin Trust.............. 1,747 1,747 -- --
Polkview Corporation...................................... 3,882 3,882 -- --
Raj Rajaratnam............................................ 970 970 -- --
R. Douglas Rivers......................................... 3,882 3,882 -- --
William J. and Josephine Joan Ryan........................ 854 854 -- --
Philip M. Sawyer.......................................... 97 97 -- --
St. Paul's School......................................... 11,646 11,646 -- --
Venture Capital Management................................ 9,452 9,452 -- --
William B. Wiener, Jr..................................... 1,165 1,165 -- --
Daniel P. Wiener.......................................... 582 582 -- --
Samuel Wiener, Jr......................................... 582 582 -- --
Sara Michelle Wiener...................................... 582 582 -- --
R. B. Woolley, Jr......................................... 7,764 7,764 -- --
Asset Management Partners................................. 38,795 38,795 -- --
Franklin P. Johnson, Jr................................... 52 52 -- --
Craig C. Taylor........................................... 5,894 5,894 -- --
John F. Shoch............................................. 4,296 4,296 -- --
W. Ferrell Sanders........................................ 1,215 1,215 -- --
LTT Partners.............................................. 388 388 -- --
Douglas E. Kelly.......................................... 116 116 -- --
Tony Di Bona.............................................. 96 96 -- --
</TABLE>
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