SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
WARBURG PINCUS EQUITY PARTNERS LP

(Last) (First) (Middle)
466 LEXINGTON AVENUE

(Street)
NEW YORK NY 10017

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
ZYMOGENETICS INC [ ZGEN ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
02/21/2008
4. If Amendment, Date of 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
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, no par value per share 02/21/2008 P 200 A $9.02 7,800,720 D(1)
Common Stock, no par value per share 02/21/2008 P 1,542 A $9.03 7,802,262 D(1)
Common Stock, no par value per share 02/21/2008 P 500 A $9.04 7,802,762 D(1)
Common Stock, no par value per share 02/21/2008 P 2,100 A $9.05 7,804,862 D(1)
Common Stock, no par value per share 02/21/2008 P 3,900 A $9.06 7,808,762 D(1)
Common Stock, no par value per share 02/21/2008 P 900 A $9.07 7,809,662 D(1)
Common Stock, no par value per share 02/21/2008 P 1,000 A $9.08 7,810,662 D(1)
Common Stock, no par value per share 02/21/2008 P 1,600 A $9.09 7,812,262 D(1)
Common Stock, no par value per share 02/21/2008 P 7,100 A $9.1 7,819,362 D(1)
Common Stock, no par value per share 02/21/2008 P 4,000 A $9.11 7,823,362 D(1)
Common Stock, no par value per share 02/21/2008 P 3,163 A $9.12 7,826,525 D(1)
Common Stock, no par value per share 02/21/2008 P 5,000 A $9.13 7,831,525 D(1)
Common Stock, no par value per share 02/21/2008 P 10,700 A $9.14 7,842,225 D(1)
Common Stock, no par value per share 02/21/2008 P 12,548 A $9.15 7,854,773 D(1)
Common Stock, no par value per share 02/21/2008 P 17,717 A $9.16 7,872,490 D(1)
Common Stock, no par value per share 02/21/2008 P 9,300 A $9.17 7,881,790 D(1)
Common Stock, no par value per share 02/21/2008 P 7,900 A $9.18 7,889,690 D(1)
Common Stock, no par value per share 02/21/2008 P 800 A $9.19 7,890,490 D(1)
Common Stock, no par value per share 02/21/2008 P 400 A $9.2 7,890,890 D(1)
Common Stock, no par value per share 02/21/2008 P 100 A $9.21 7,890,990 D(1)
Common Stock, no par value per share 02/21/2008 P 600 A $9.22 7,891,590 D(1)
Common Stock, no par value per share 02/21/2008 P 500 A $9.23 7,892,090 D(1)
Common Stock, no par value per share 02/21/2008 P 100 A $9.24 7,892,190 D(1)
Common Stock, no par value per share 02/21/2008 P 1,200 A $9.25 7,893,390 D(1)
Common Stock, no par value per share 02/21/2008 P 500 A $9.26 7,893,890 D(1)
Common Stock, no par value per share 02/21/2008 P 600 A $9.27 7,894,490 D(1)
Common Stock, no par value per share 02/21/2008 P 1,200 A $9.28 7,895,690 D(1)
Common Stock, no par value per share 02/21/2008 P 400 A $9.29 7,896,090 D(1)
Common Stock, no par value per share 02/21/2008 P 800 A $9.3 7,896,890 D(1)
Common Stock, no par value per share 02/21/2008 P 200 A $9.32 7,897,090 D(1)
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 Securities Underlying Derivative Security (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: 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
1. Name and Address of Reporting Person*
WARBURG PINCUS EQUITY PARTNERS LP

(Last) (First) (Middle)
466 LEXINGTON AVENUE

(Street)
NEW YORK NY 10017

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
WARBURG PINCUS & CO

(Last) (First) (Middle)
466 LEXINGTON AVENUE

(Street)
NEW YORK NY 10017

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
Warburg Pincus Partners LLC

(Last) (First) (Middle)
466 LEXINGTON AVENUE

(Street)
NEW YORK NY 10017

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
WARBURG PINCUS LLC

(Last) (First) (Middle)
466 LEXINGTON AVENUE

(Street)
NEW YORK NY 10017

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
KAYE CHARLES R

(Last) (First) (Middle)
C/O WARBURG PINCUS LLC
466 LEXINGTON AVE

(Street)
NEW YORK NY 10017

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
LANDY JOSEPH

(Last) (First) (Middle)
C/O WARBURG PINCUS LLC
466 LEXINGTON AVE

(Street)
NEW YORK NY 10017

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
Explanation of Responses:
1. See the Note on Exhibit 99.2 attached hereto.
Remarks:
Exhibit List Exhibit 99.1 - Joint Filers' Names and Addresses Information Exhibit 99.2 - Explanation of Responses Exhibit 99.3 - Joint Filers' Signatures Exhibit 99.4 - Table I (cont'd) - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
WARBURG, PINCUS EQUITY PARTNERS, L.P., By: Warburg Pincus Partners LLC, its General Partner, By: Warburg Pincus & Co., its Managing Member, By: /s/ Scott A. Arenare, Partner 02/25/2008
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.