Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
DELPHI MANAGEMENT PARTNERS VI LLC
  2. Issuer Name and Ticker or Trading Symbol
SEATTLE GENETICS INC /WA [SGEN]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
3000 SAND HILL RD, BLDG 1, STE 135, C/O DELPHI VENTURES
3. Date of Earliest Transaction (Month/Day/Year)
01/17/2007
(Street)

MENLO PARK, CA 94025
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 01/17/2007   C   1,980,200 (4) A (1) 1,980,200 (4) D (4) (5)  
Common Stock 01/17/2007   C   19,800 (4) A (1) 2,000,000 (4) I See Footnote (2) (4)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series A Convertible Preferred Stock (1) 01/17/2007   C     198,020 (4)   (3)   (3) Common Stock 1,980,200 (4) (1) 0 D (4) (5)  
Series A Convertible Preferred Stock (1) 01/17/2007   C     1,980 (4)   (3)   (3) Common Stock 19,800 (4) (1) 0 I See Footnote (2) (4)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
DELPHI MANAGEMENT PARTNERS VI LLC
3000 SAND HILL RD, BLDG 1, STE 135
C/O DELPHI VENTURES
MENLO PARK, CA 94025
    X    
DELPHI VENTURES VI LP
3000 SAND HILL RD STE 135
C/O DELPHI VENTURES
MENLO PARK, CA 94025
    X    
DELPHI BIOINVESTMENTS VI LP
3000 SAND HILL ROAD, BLDG 1, STE 135
C/O DELPHI VENTURES
MENLO PARK, CA 94025
    X    

Signatures

 Deepika R. Pakianathan   01/19/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The conversion price of the Series A Convertible Preferred Stock is equal to the initial purchase price divided by $2.50, as adjusted for stock splits, stock dividends, combinations and other similar capitalizations of the Issuer's Common and Preferred Stock. Initially, this results in a 1 for 10 conversion ratio. Each share of Series A Convertible Preferred Stock is entitled to 0.93 votes for each share of common stock into which such share of Convertible Preferred Stock could then be converted.
(2) The amount shown represents the beneficial ownership by Delphi BioInvestments VI, L.P.
(3) All of the outstanding shares of the Issuer's Series A Convertible Preferred Stock are convertible at the holder's option into shares of the Issuer's common stock on a 10 to 1 basis any time after July 8, 2004. This right to convert does not expire.
(4) The Designated Filer is executing this report on behalf of all Reporting Persons, each of whom has authorized it to do so. Each of the Reporting Persons disclaims beneficial ownership of the Issuer's securities to the extent it exceeds such Reporting Person's pecuniary interest.The amounts shown in Table I and Table II represent the beneficial ownership of the Issuer's equity securities by (a) Delphi Ventures VI, L.P. and (b) Delphi BioInvestments VI, L.P. (the "Delphi Entities"), a portion of which may be deemed attributable to the Designated Filer because it is the general partner of each of the Delphi Entities. The Designated Filer disclaims such beneficial ownership except to the extent of its pecuniary interest therein.
(5) The amount shown represents the beneficial ownership by Delphi Ventures, VI, L.P.

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