<PAGE>
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(AMENDMENT NO. ______)*
Aviron
--------
(Name of Issuer)
Common
--------
(Title of Class of Securities)
053762 10 0
-------------
(CUSIP Number)
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
Page 1 of 21
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 2 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS. S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE
PERSONS
Accel IV L.P.
- -------------------------------------------------------------------------------
(2) CHECK THE APPROPRIATE BOX IF A MEMBER (a) / /
OF A GROUP* (b) /X/
- -------------------------------------------------------------------------------
(3) SEC USE ONLY
- -------------------------------------------------------------------------------
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
781,200
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
781,200
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
781,200
- -------------------------------------------------------------------------------
(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
7.0
- -------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
PN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 3 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS. S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE
PERSONS
Accel Japan L.P.
- -------------------------------------------------------------------------------
(2) CHECK THE APPROPRIATE BOX IF A MEMBER (a) / /
OF A GROUP* (b) /X/
- -------------------------------------------------------------------------------
(3) SEC USE ONLY
- -------------------------------------------------------------------------------
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
74,666
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
74,666
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
74,666
- -------------------------------------------------------------------------------
(10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
0.7
- -------------------------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
PN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 4 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Accel Keiretsu L.P.
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
16,800
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
16,800
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
16,800
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
0.2
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
PN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 5 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Accel Investors '93 L.P.
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
34,533
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
34,533
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
34,533
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
0.3
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
PN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 6 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Accel IV Associates L.P.
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
781,200
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
781,200
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
781,200
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.0
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
PN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 7 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Ellmore C. Patterson Partners
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
20,532
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
20,532
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
20,532
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
0.2
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
PN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 8 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Swartz Family Partnership
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
781,200
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
781,200
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
781,200
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.0
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
PN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 9 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
James W. Breyer
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
907,199
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
907,199
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
907,199
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.1
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 10 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Luke B. Evnin
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
832,533
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
832,533
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
832,533
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.4
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 11 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Eugene D. Hill, III
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /x/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
798,000
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
798,000
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
798,000
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.1
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 12 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Paul H. Klingenstein
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
907,199
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
907,199
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
907,199
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.1
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 13 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
Arthur Patterson
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
927,731
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
927,731
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
927,731
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.3
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 14 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
G. Carter Sednaoui
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
907,199
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
907,199
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
907,199
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.1
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IN
- -------------------------------------------------------------------------------
<PAGE>
CUSIP No. 053762 10 0 13G PAGE 15 OF 21 PAGES
----------- --- ----
- -------------------------------------------------------------------------------
1 NAME OF REPORTING PERSONS
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
James R. Swartz
- -------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) /X/
- -------------------------------------------------------------------------------
3 SEC USE ONLY
- -------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
United States
- -------------------------------------------------------------------------------
(5) SOLE VOTING POWER
907,199
NUMBER OF SHARES --------------------------------------------------
BENEFICIALLY (6) SHARED VOTING POWER
OWNED BY
EACH REPORTING --------------------------------------------------
PERSON WITH (7) SOLE DISPOSITIVE POWER
907,199
--------------------------------------------------
(8) SHARED DISPOSITIVE POWER
- -------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
907,199
- -------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
- -------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
8.1
- -------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IN
- -------------------------------------------------------------------------------
<PAGE>
ACCEL PARTNERS 13G
ITEM 1. ISSUER'S NAME AND ADDRESS OF PRINCIPAL EXECUTIVE OFFICES:
(a) Aviron ("Issuer")
(b) 297 North Bernardo Avenue
Mountain View, CA 94043
ITEM 2. INFORMATION CONCERNING PERSON FILING:
(a) Filing Persons:
Entities:
Accel IV L.P. ("A4")
Accel Japan L.P. ("AJ")
Accel Keiretsu L.P. ("AK")
Accel Investors `93 L.P. ("AI93")
Accel IV Associates L.P. ("A4A")
Ellmore C. Patterson Partners ("ECPP")
Swartz Family Partnership L.P. ("SFP")
Individuals:
James W. Breyer ("JWB")
Luke B. Evnin ("LBE")
Eugene D. Hill, III ("EDH")
Paul H. Klingenstein ("PHK")
Arthur C. Patterson ("ACP")
G. Carter Sednaoui ("GCS")
James R. Swartz ("JRS")
(b) Principal Business Address: One Embarcadero Center
Suite 3820
San Francisco, CA 94111
(c) Citizenship/Place of Organization:
Entities:
Accel IV L.P. ("A4") Delaware
Accel Japan L.P. ("AJ") Delaware
Accel Keiretsu L.P. ("AK") Delaware
Accel Investors `93 L.P. ("AI93") Delaware
Accel IV Associates L.P. ("A4A") Delaware
Ellmore C. Patterson Partners ("ECPP") Delaware
Swartz Family Partnership L.P. ("SFP") Delaware
<PAGE>
Individuals:
James W. Breyer ("JWB") United States
Luke B. Evnin ("LBE") United States
Eugene D. Hill, III ("EDH") United States
Paul H. Klingenstein ("PHK") United States
Arthur C. Patterson ("ACP") United States
G. Carter Sednaoui ("GCS") United States
James R. Swartz ("JRS") United States
(d) Title of Class of Securities: Common Stock
(e) CUSIP No.: 053762 10 0
ITEM 3. STATUS OF PERSON FILING:
Not Applicable
ITEM 4. OWNERSHIP:
<TABLE>
<CAPTION>
ENTITIES: A4 AJ AK AI93 A4A ECPP SFP
-- -- -- ---- --- ---- ---
<S> <C> <C> <C> <C> <C> <C> <C>
(a) Beneficial
Ownership: 781,200 74,666 16,800 34,533 781,200 20,532 781,200
(b) Percentage
of Class: 7.0% 0.7% 0.2% 0.3% 7.0% 0.2% 7.0%
(c) Sole Voting
Power: 781,200 74,666 16,800 34,533 781,200 20,532 0
Shared Voting
Power: 0 0 0 0 0 0 781,200
Sole Dispositive
Power: 781,200 74,666 16,800 34,533 781,200 20,532 0
Shared Dispositive
Power: 0 0 0 0 0 781,200
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
INDIVIDUALS: JWB LBE EDH PHK ACP GCS JRS
<S> <C> <C> <C> <C> <C> <C> <C>
(a) Beneficial
Ownership: 907,199 832,533 798,000 907,199 927,731 907,199 907,199
(b) Percentage
of Class: 8.1% 7.4% 7.1% 8.1% 8.3% 8.1% 8.1%
(c) Sole Voting
Power: 0 0 0 0 20,532 0 0
Shared Voting
Power: 907,199 832,533 798,000 907,199 907,199 907,199 907,199
Sole Dispositive
Power: 0 0 0 0 20,532 0 0
Shared Dispositive
Power: 907,199 832,533 798,000 907,199 907,199 907,199 907,199
</TABLE>
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS:
Not Applicable
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:
Under certain circumstances set forth in A4's, A4A's, AJ's, AK's,
AI93's, ECPP's and SFP's respective partnership agreements, the
general partners and/or limited partners of each such funds have the
right to receive dividends from, or the proceeds from the sale of the
Common Stock of Issuer owned by each such fund.
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF SUBSIDIARY:
Not Applicable
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF GROUP:
Not Applicable
ITEM 9. NOTICE OF DISSOLUTION OF GROUP:
Not Applicable
ITEM 10. CERTIFICATION:
Not Applicable
Exhibit A: Joint Filing Statement
<PAGE>
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.
Dated: February 11, 1997
Entities:
Accel IV L.P. ("A4")
Accel Japan L.P. ("AJ")
Accel Keiretsu L.P. ("AK")
Accel Investors `93 L.P. ("AI93")
Accel IV Associates L.P. ("A4A")
Ellmore C. Patterson Partners ("ECPP")
Swartz Family Partnership L.P. ("SFP")
By:/s/ G. Carter Sednaoui
-------------------------------------
G. Carter Sednaoui, Attorney-in-
Fact for the above-listed
entities
Individuals:
James W. Breyer ("JWB")
Luke B. Evnin ("LBE")
Eugene D. Hill, III ("EDH")
Paul H. Klingenstein ("PHK")
Arthur C. Patterson ("ACP")
G. Carter Sednaoui ("GCS")
James R. Swartz ("JRS")
By:/s/ G. Carter Sednaoui
-------------------------------------
G. Carter Sednaoui, Individually and
as for the above-listed entities
<PAGE>
EXHIBIT INDEX
Sequentially
Exhibit Document Description Numbered Page
- ------- -------------------- -------------
A Agreement of Joint Filing 21
<PAGE>
EXHIBIT A
AGREEMENT OF JOINT FILING
Each of the undersigned hereby agrees that they are filing jointly pursuant
to Rule 13d-1(f)(1) of the Securities Exchange Act of 1934, as amended, the
Statement dated February 11, 1997, containing the information required by
Schedule 13G, for the shares of common Stock of Aviron which they each
beneficially hold.
Dated: February 11, 1997
Entities:
Accel IV L.P. ("A4")
Accel Japan L.P. ("AJ")
Accel Keiretsu L.P. ("AK")
Accel Investors `93 L.P. ("AI93")
Accel IV Associates L.P. ("A4A")
Ellmore C. Patterson Partners ("ECPP")
Swartz Family Partnership L.P. ("SFP")
By:/s/ G. Carter Sednaoui
-------------------------------------
G. Carter Sednaoui, Attorney-in-
Fact for the above-listed
entities
Individuals:
James W. Breyer ("JWB")
Luke B. Evnin ("LBE")
Eugene D. Hill, III ("EDH")
Paul H. Klingenstein ("PHK")
Arthur C. Patterson ("ACP")
G. Carter Sednaoui ("GCS")
James R. Swartz ("JRS")
By:/s/ G. Cartner Sednaoui
-------------------------------------
G. Carter Sednaoui, Individually
and as for the above-listed
entities
