Page 1 of 13 Pages
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
(Rule 13d-1)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO
RULES 13d-1(b), (c) and (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
(Amendment No. 3)*
SONUS PHARMACEUTICALS, INC.
(Name of Issuer)
COMMON STOCK
(Title of Class of Securities)
835692104
(CUSIP Number)
December 8, 1999
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:
/ / Rule 13d-1(b)
/ / Rule 13d-1(c)
/X/ Rule 13d-1(d)
*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>
CUSIP No. 835692104 Page 2 of 13 pages
- - ---------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Aperture Associates, L.P.
94-3128732
- - ----------------------------------------------------------------
(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
408,099
-----------------------------------
NUMBER OF SHARES (6) SHARED VOTING POWER
BENEFICIALLY OWNED BY 0
EACH REPORTING PERSON-----------------------------------
WITH (7) SOLE DISPOSITIVE POWER
408,099
-----------------------------------
(8) SHARED DISPOSITIVE POWER
0
- - ---------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON
408,099
- - ---------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES* / /
- - ---------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
4.5%
- - ---------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
PN
- - ---------------------------------------------------------------
<PAGE>
CUSIP No. 835692104 Page 3 of 13 pages
- - ---------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Horsley Bridge Partners, Inc.
16-1193261
- - ----------------------------------------------------------------
(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
0
-----------------------------------
NUMBER OF SHARES (6) SHARED VOTING POWER
BENEFICIALLY OWNED BY 647,524
EACH REPORTING PERSON-----------------------------------
WITH (7) SOLE DISPOSITIVE POWER
0
-----------------------------------
(8) SHARED DISPOSITIVE POWER
647,524
- - ---------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON
647,524
- - ---------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES* / /
- - ---------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.2%
- - ---------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
IA, CO
- - ---------------------------------------------------------------
<PAGE>
CUSIP No. 835692104 Page 4 of 13 pages
- - ---------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Aperture Partners, L.P.
94-3128731
- - ----------------------------------------------------------------
(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
0
-----------------------------------
NUMBER OF SHARES (6) SHARED VOTING POWER
BENEFICIALLY OWNED BY 408,099
EACH REPORTING PERSON-----------------------------------
WITH (7) SOLE DISPOSITIVE POWER
0
-----------------------------------
(8) SHARED DISPOSITIVE POWER
408,099
- - ---------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON
408,099
- - ---------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES* / /
- - ---------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
4.5%
- - ---------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
PN
- - ---------------------------------------------------------------
<PAGE>
CUSIP No. 835692104 Page 5 of 13 pages
- - ---------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
S. Phillip Horsley
- - ----------------------------------------------------------------
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) /x/
- - ---------------------------------------------------------------
(3) SEC USE ONLY
- - ---------------------------------------------------------------
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
U.S.A.
- - ---------------------------------------------------------------
(5) SOLE VOTING POWER
0
-----------------------------------
NUMBER OF SHARES (6) SHARED VOTING POWER
BENEFICIALLY OWNED BY 647,524
EACH REPORTING PERSON-----------------------------------
WITH (7) SOLE DISPOSITIVE POWER
0
-----------------------------------
(8) SHARED DISPOSITIVE POWER
647,524
- - ---------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON
647,524
- - ---------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES* / /
- - ---------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.2%
- - ---------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
IN
- - ---------------------------------------------------------------
<PAGE>
CUSIP No. 835692104 Page 6 of 13 pages
- - ---------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Gary L. Bridge
- - ----------------------------------------------------------------
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) / /
(b) /x/
- - ---------------------------------------------------------------
(3) SEC USE ONLY
- - ---------------------------------------------------------------
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
U.S.A.
- - ---------------------------------------------------------------
(5) SOLE VOTING POWER
0
-----------------------------------
NUMBER OF SHARES (6) SHARED VOTING POWER
BENEFICIALLY OWNED BY 647,524
EACH REPORTING PERSON-----------------------------------
WITH (7) SOLE DISPOSITIVE POWER
0
-----------------------------------
(8) SHARED DISPOSITIVE POWER
647,524
- - ---------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON
647,524
- - ---------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES* / /
- - ---------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
7.2%
- - ---------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
IN
- - ---------------------------------------------------------------
<PAGE>
CUSIP No. 835692104 Page 7 of 13 pages
- - ---------------------------------------------------------------
(1) NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
N. Dan Reeve
- - ----------------------------------------------------------------
(2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
Instructions)
(a) / /
(b) /x/
- - ---------------------------------------------------------------
(3) SEC USE ONLY
- - ---------------------------------------------------------------
(4) CITIZENSHIP OR PLACE OF ORGANIZATION
U.S.A.
- - ---------------------------------------------------------------
(5) SOLE VOTING POWER
1,500
-----------------------------------
NUMBER OF SHARES (6) SHARED VOTING POWER
BENEFICIALLY OWNED BY 408,099
EACH REPORTING PERSON-----------------------------------
WITH (7) SOLE DISPOSITIVE POWER
1,500
-----------------------------------
(8) SHARED DISPOSITIVE POWER
408,099
- - ---------------------------------------------------------------
(9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
PERSON
409,599
- - ---------------------------------------------------------------
(10) CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES* / /
- - ---------------------------------------------------------------
(11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
4.6%
- - ---------------------------------------------------------------
(12) TYPE OF REPORTING PERSON*
IN
- - ---------------------------------------------------------------
<PAGE>
Page 8 of 13 Pages
ITEM 1.
(a) NAME OF ISSUER. Sonus Pharmaceuticals, Inc.
(b) ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES.
22026 20th Avenue Southeast
Suite 102
Bothell, Washington 98021
ITEM 2.
(a) NAME OF PERSON FILING.
Pursuant to Rule 13d-1(f)(1) of Regulation 13D-G of the
General Rules and Regulations under the Securities Exchange Act of 1934, as
amended (the "Act"), the undersigned hereby file this Schedule 13G
Amendment No. 3 on behalf of Aperture Associates, L.P. ("Aperture"),
Horsley Bridge Partners, Inc. ("HBP"), Aperture Partners, L.P. ("Aperture
Partners"), S. Phillip Horsley ("Horsley"), Gary L. Bridge ("Bridge") and
N. Dan Reeve ("Reeve"). Aperture, HBP, Aperture Partners, Horsley,
Bridge and Reeve are sometimes hereinafter collectively referred to as the
"Reporting Persons."
(b) ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE.
The principal business office of each of the Reporting
Persons is:
505 Montgomery Street
San Francisco, California 94111
(c) CITIZENSHIP.
Each of Aperture, HBP and Aperture Partners is organized in
the State of Delaware.
Each of Horsley, Bridge and Reeve is a citizen of the U.S.A.
(d) TITLE OF CLASS OF SECURITY.
Common Stock
(e) CUSIP NUMBER.
835692104
<PAGE>
Page 9 of 13 Pages
ITEM 3.
Not applicable.
ITEM 4. OWNERSHIP.
With respect to Aperture:
(a) Amount Beneficially Owned: 408,099
(b) Percent of Class: 4.5%
(c) Number of shares as to which such person has:
(i) sole power to vote or
to direct the vote: 408,099
(ii) shared power to vote or
to direct the vote: None
(iii) sole power to dispose
or to direct the
disposition of: 408,099
(iv) shared power to dispose
or to direct the
disposition of: None
With respect to Aperture Partners:
(a) Amount Beneficially Owned: 408,099
(b) Percent of Class: 4.5%
(c) Number of shares as to which such person has:
(i) sole power to vote or
to direct the vote: None
(ii) shared power to vote or
to direct the vote: 408,099
(iii) sole power to dispose
or to direct the
disposition of: None
(iv) shared power to dispose
or to direct the
disposition of: 408,099
<PAGE>
Page 10 of 13 Pages
With respect to HBP, Horsley and Bridge:
(a) Amount Beneficially Owned: 647,524
(b) Percent of Class: 7.2%
(c) Number of shares as to which such person has:
(i) sole power to vote or
to direct the vote: None
(ii) shared power to vote or
to direct the vote: 647,524
(iii) sole power to dispose
or to direct the
disposition of: None
(iv) shared power to dispose
or to direct the
disposition of: 647,524
With respect to Reeve:
(a) Amount Beneficially Owned: 409,599
(b) Percent of Class: 4.6%
(c) Number of shares as to which such person has:
(i) sole power to vote or
to direct the vote: 1,500
(ii) shared power to vote or
to direct the vote: 408,099
(iii) sole power to dispose
or to direct the
disposition of: 1,500
(iv) shared power to dispose
or to direct the
disposition of: 408,099
This statement relates to shares of Common Stock and warrants of
the Issuer which are held by Aperture, Horsley Bridge Fund I, L.P., a New
York limited partnership ("HB Fund I"), Horsley Bridge Fund II, L.P., a
Delaware limited partnership ("HB Fund II"), Horsley Bridge Fund III, L.P., a
Delaware limited partnership ("HB Fund III"), and the John Deere Pension Trust
("Deere").
<PAGE>
Page 11 of 13 Pages
The power to vote or to direct the vote and to dispose or to
direct the disposition of Common Stock held by Aperture is exercised by the
general partners of Aperture through a Management Committee comprised of
Horsley, Bridge and Reeve. The power to vote or to direct the vote and to
dispose or to direct the disposition of Common Stock held by HB Fund I,
HB Fund II, HB Fund III and Deere is vested in HBP pursuant to a combination
of management and partnership agreements. Horsley and Bridge, the trustees
of certain family trusts which own all of the stock of HBP and are the
directors of HBP, may be deemed to share the voting and dispositive power held
by HBP. Mr. Horsley and Mr. Bridge also may be deemed to share voting
and dispositive power because of their status as general partners of other
partnerships which serve as general partners of Aperture, HB Fund I,
HB Fund II and HB Fund III.
Pursuant to Rule 13d-4 of Regulation 13D-G of the General Rules
and Regulations under the Act: Aperture Partners, Horsley, Bridge and Reeve
each disclaim beneficial ownership of the Common Stock of the Issuer owned
by Aperture; Horsley and Bridge each disclaim beneficial ownership of the
Common Stock of the Issuer owned by HB Fund I, HB Fund II, HB Fund III and
Deere; and the filing of this Statement by such Reporting Persons shall not
be construed as an admission that such Reporting Persons are, for the
purposes of Section 13(d) or 13(g) of the Act, beneficial owners of such
Common Stock.
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
Aperture, Aperture Partners and Reeve no longer beneficially own
more than five percent of the outstanding Common Stock. Not applicable
with respect to the other Reporting Persons.
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
Not applicable.
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
COMPANY.
Not applicable.
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
Not applicable.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP.
Not applicable.
ITEM 10. CERTIFICATIONS.
Not applicable.
<PAGE>
Page 12 of 13 Pages
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, 2000 APERTURE ASSOCIATES, L.P.
By: Horsley Bridge Partners, Inc.
Its: General Partner
By: /s/ Phillip Horsley
------------------------
Phillip Horsley
Its: President
HORSLEY BRIDGE PARTNERS, INC.
By: /s/ Phillip Horsley
------------------------------
Phillip Horsley
Its: President
APERTURE PARTNERS, L.P.
By: /s/ Phillip Horsley
------------------------------
Phillip Horsley
Its: General Partner
/s/ Phillip Horsley
------------------------------
PHILLIP HORSLEY
/s/ Gary L. Bridge
------------------------------
GARY L. BRIDGE
/s/ N. Dan Reeve
------------------------------
N. DAN REEVE
Page 13 of 13 Pages
EXHIBIT A
Pursuant to Rule 13d-1(f)(1)(iii) of Regulation 13D-G of the
General Rules and Regulations of the Securities and Exchange Commission
under the Securities Exchange Act of 1934, as amended, the undersigned agree
that the statement to which this Exhibit is attached is filed on behalf of
each of them.
Dated: February 11, 2000 APERTURE ASSOCIATES, L.P.
By: Horsley Bridge Partners, Inc.
Its: General Partner
By: /s/ Phillip Horsley
------------------------
Phillip Horsley
Its: President
HORSLEY BRIDGE PARTNERS, INC.
By: /s/ Phillip Horsley
------------------------------
Phillip Horsley
Its: President
APERTURE PARTNERS, L.P.
By: /s/ Phillip Horsley
------------------------------
Phillip Horsley
Its: General Partner
/s/ Phillip Horsley
------------------------------
PHILLIP HORSLEY
/s/ Gary L. Bridge
------------------------------
GARY L. BRIDGE
/s/ N. Dan Reeve
------------------------------
N. DAN REEVE
