UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
PATHOGENESIS CORP.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
70321E104
(CUSIP Number)
April 20, 2000
(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)
|x| Rule 13d-1 (c)
|_| 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 disclosures provided in a prior cover page.
The information required on 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. 70321E104
(1) Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person
OrbiMed Advisors Inc.
----------------------------------------------------------------------
(2) Check the Appropriate Box if a Member of Group (See Instructions)
[ ] (a)
[ ] (b)
----------------------------------------------------------------------
(3) SEC Use Only
----------------------------------------------------------------------
(4) Citizenship or Place of Organization British Virgin Islands
----------------------------------------------------------------------
Number of (5) Sole Voting Power 0
Shares
Beneficially -------------------------------------------------------------
Owned by (6) Shared Voting Power 881,000
Each
Reporting -------------------------------------------------------------
Person (7) Sole Dispositive Power 0
With
-------------------------------------------------------------
(8) Shared Dispositive Power 881,000
----------------------------------------------------------------------
(9) Aggregate Amount Beneficially Owned by Each Reporting Person
881,000
----------------------------------------------------------------------
(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions)
----------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
5.3%
----------------------------------------------------------------------
(12) Type of Reporting Person (See Instructions) IA
---------------------------------------------
<PAGE>
CUSIP No. 70321E104
(1) Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person
OrbiMed Advisors LLC
----------------------------------------------------------------------
(2) Check the Appropriate Box if a Member of Group (See Instructions)
[ ] (a)
[ ] (b)
-----------------------------------------------------------------
(3) SEC Use Only
----------------------------------------------------------------------
(4) Citizenship or Place of Organization Delaware
----------------------------------------------------------------------
Number of (5) Sole Voting Power 0
Shares
Beneficially -------------------------------------------------------------
Owned by (6) Shared Voting Power 881,000
Each
Reporting -------------------------------------------------------------
Person (7) Sole Dispositive Power 0
With
-------------------------------------------------------------
(8) Shared Dispositive Power 881,000
----------------------------------------------------------------------
(9) Aggregate Amount Beneficially Owned by Each Reporting Person
881,000
----------------------------------------------------------------------
(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions)
----------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
5.3%
----------------------------------------------------------------------
(12) Type of Reporting Person (See Instructions) CO
---------------------------------------------
<PAGE>
CUSIP No. 70321E104
(1) Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person
Caduceus Capital Trust
----------------------------------------------------------------------
(2) Check the Appropriate Box if a Member of Group (See Instructions)
[ ] (a)
[ ] (b)
----------------------------------------------------------------------
(3) SEC Use Only
----------------------------------------------------------------------
(4) Citizenship or Place of Organization Bermuda
----------------------------------------------------------------------
Number of (5) Sole Voting Power 0
Shares
Beneficially -------------------------------------------------------------
Owned by (6) Shared Voting Power 881,000
Each
Reporting -------------------------------------------------------------
Person (7) Sole Dispositive Power 0
With
-------------------------------------------------------------
(8) Shared Dispositive Power 881,000
----------------------------------------------------------------------
(9) Aggregate Amount Beneficially Owned by Each Reporting Person
881,000
----------------------------------------------------------------------
(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions)
----------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
5.3%
----------------------------------------------------------------------
(12) Type of Reporting Person (See Instructions) OO
---------------------------------------------
<PAGE>
CUSIP No. 70321E104
(1) Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person
Caduceus Capital II, L.P.
----------------------------------------------------------------------
(2) Check the Appropriate Box if a Member of Group (See Instructions)
[ ] (a)
[ ] (b)
----------------------------------------------------------------------
(3) SEC Use Only
----------------------------------------------------------------------
(4) Citizenship or Place of Organization Delaware
----------------------------------------------------------------------
Number of (5) Sole Voting Power 0
Shares
Beneficially -------------------------------------------------------------
Owned by (6) Shared Voting Power 881,000
Each
Reporting -------------------------------------------------------------
Person (7) Sole Dispositive Power 0
With
-------------------------------------------------------------
(8) Shared Dispositive Power 881,000
----------------------------------------------------------------------
(9) Aggregate Amount Beneficially Owned by Each Reporting Person
881,000
----------------------------------------------------------------------
(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions)
----------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
5.3%
----------------------------------------------------------------------
(12) Type of Reporting Person (See Instructions) PN
---------------------------------------------
<PAGE>
CUSIP No. 70321E104
(1) Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person
PaineWebber Eucalyptus Fund, LLC
----------------------------------------------------------------------
(2) Check the Appropriate Box if a Member of Group (See Instructions)
[ ] (a)
[ ] (b)
----------------------------------------------------------------------
(3) SEC Use Only
----------------------------------------------------------------------
(4) Citizenship or Place of Organization Delaware
----------------------------------------------------------------------
Number of (5) Sole Voting Power 0
Shares
Beneficially -------------------------------------------------------------
Owned by (6) Shared Voting Power 881,000
Each
Reporting -------------------------------------------------------------
Person (7) Sole Dispositive Power 0
With
-------------------------------------------------------------
(8) Shared Dispositive Power 881,000
----------------------------------------------------------------------
(9) Aggregate Amount Beneficially Owned by Each Reporting Person
881,000
----------------------------------------------------------------------
(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions)
----------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
5.3%
----------------------------------------------------------------------
(12) Type of Reporting Person (See Instructions) CO
---------------------------------------------
<PAGE>
CUSIP No. 70321E104
(1) Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person
PaineWebber Eucalyptus Fund, Ltd.
----------------------------------------------------------------------
(2) Check the Appropriate Box if a Member of Group (See Instructions)
[ ] (a)
[ ] (b)
----------------------------------------------------------------------
(3) SEC Use Only
----------------------------------------------------------------------
(4) Citizenship or Place of Organization Cayman Islands
----------------------------------------------------------------------
Number of (5) Sole Voting Power 0
Shares
Beneficially -------------------------------------------------------------
Owned by (6) Shared Voting Power 881,000
Each
Reporting -------------------------------------------------------------
Person (7) Sole Dispositive Power 0
With
-------------------------------------------------------------
(8) Shared Dispositive Power 881,000
----------------------------------------------------------------------
(9) Aggregate Amount Beneficially Owned by Each Reporting Person
881,000
----------------------------------------------------------------------
(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions)
----------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
5.3%
----------------------------------------------------------------------
(12) Type of Reporting Person (See Instructions) CO
---------------------------------------------
<PAGE>
CUSIP No. 70321E104
(1) Name of Reporting Person
S.S. or I.R.S. Identification No. of Above Person
Worldwide Health Sciences Portfolio
----------------------------------------------------------------------
(2) Check the Appropriate Box if a Member of Group (See Instructions)
[ ] (a)
[ ] (b)
----------------------------------------------------------------------
(3) SEC Use Only
----------------------------------------------------------------------
(4) Citizenship or Place of Organization New York
----------------------------------------------------------------------
Number of (5) Sole Voting Power 0
Shares
Beneficially -------------------------------------------------------------
Owned by (6) Shared Voting Power 881,000
Each
Reporting -------------------------------------------------------------
Person (7) Sole Dispositive Power 0
With
-------------------------------------------------------------
(8) Shared Dispositive Power 881,000
----------------------------------------------------------------------
(9) Aggregate Amount Beneficially Owned by Each Reporting Person
881,000
----------------------------------------------------------------------
(10) Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
Instructions)
----------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
5.3%
----------------------------------------------------------------------
(12) Type of Reporting Person (See Instructions) IV
---------------------------------------------
<PAGE>
Item 1. Issuer
(a) Pathogenesis Corp.
(b) 201 Elliott Avenue West, Seattle, WA 98119
Item 2. Persons Filing
(a) Name of Persons Filing:
OrbiMed Advisors Inc.
OrbiMed Advisors LLC
Caduceus Capital Trust
Caduceus Capital II, L.P.
PaineWebber Eucalyptus Fund, LLC
PaineWebber Eucalyptus Fund, Ltd.
Worldwide Health Services Portfolio
(b) Address of Principal Offices:
c/o OrbiMed Advisors LLC
767 Third Avenue, 6th Floor
New York, New York 10010
(c) Citizenship:
Please refer to Item 4 on each cover sheet for each
filing person
(d) Title of Class of Securities:
Common Stock
(e) CUSIP Number: 703221E104
Item 3. Not Applicable
Item 4. Ownership
Please see Items 5, 6, 7, 8, 9, and 11 for each cover
sheet for each filing entity.
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
Not Applicable.
Item 7. Identification and Classification of the Subsidiary Which
Acquired the Security Being Reported on by the Parent Holding
Company
<PAGE>
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. Certification
By signing below I certify that, to the best of my knowledge
and belief, the securities referred to above were not acquired
and are not held for the purpose of or with the effect of
changing or influencing the control of the issuer of the
securities and were not acquired and are not held in
connection with or as a participant in any transaction having
that purpose or effect.
<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.
Date: May 1, 2000
ORBIMED ADVISORS INC.
By: /s/ Samuel D. Isaly
----------------------------
Name: Samuel D. Isaly
Title: President
ORBIMED ADVISORS LLC
By: /s/ Samuel D. Isaly
----------------------------
Name: Samuel D. Isaly
Title: Managing Member
CADUCEUS CAPITAL TRUST
By: /s/ Deborah O'Donnel
----------------------------
Name: Deborah O'Donnel
Title: Secretary
CADUCEUS CAPITAL II, L.P.
By: OrbiMed Advisors LLC,
its general partner
By: /s/ Samuel D. Isaly
----------------------------
Name: Samuel D. Isaly
Title: Managing Member
PAINEWEBBER EUCALYPTUS FUND, LLC
By:/s/ Samuel D. Isaly
----------------------------
Name: Samuel D. Isaly
Title: Director
<PAGE>
PAINEWEBBER EUCALYPTUS FUND, LTD.
By:/s/ Samuel D. Isaly
----------------------------
Name: Samuel D. Isaly
Title: Director
WORLDWIDE HEALTH SCIENCES PORTFOLIO
By:/s/ Samuel D. Isaly
----------------------------
Name: Samuel D. Isaly
Title: Director
