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*
Musket David B

(Last) (First) (Middle)
125 CAMBRIDGEPARK DRIVE

(Street)
CAMBRIDGE MA 02140

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
AEROGEN INC [ AEGN ]
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)
04/25/2005
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 04/25/2005 P 35,000 A $0.9879 826,972 I See Footnotes(1)(2)
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*
Musket David B

(Last) (First) (Middle)
125 CAMBRIDGEPARK DRIVE

(Street)
CAMBRIDGE MA 02140

(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*
KUROKAWA BARRY

(Last) (First) (Middle)
C/O PROMED PARTNERS, L.P.
125 CAMBRIDGEPARK DRIVE

(Street)
CAMBRIDGE MA 02140

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director 10% Owner
Officer (give title below) X Other (specify below)
Joint Filer
1. Name and Address of Reporting Person*
PROMED ASSET MANAGEMENT, LLC

(Last) (First) (Middle)
125 CAMBRIDGEPARK DRIVE

(Street)
CAMBRIDGE MA 02140

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director 10% Owner
Officer (give title below) X Other (specify below)
Joint Filer
1. Name and Address of Reporting Person*
PROMED PARTNERS L P

(Last) (First) (Middle)
125 CAMBRIDGEPARK DR

(Street)
CAMBRIDGE MA 02104

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director 10% Owner
Officer (give title below) X Other (specify below)
Joint Filer
1. Name and Address of Reporting Person*
PROMED PARTNERS II LP

(Last) (First) (Middle)
125 CAMBRIDGEPARK DR

(Street)
CAMBRIDGE MA 02104

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director 10% Owner
Officer (give title below) X Other (specify below)
Joint Filer
1. Name and Address of Reporting Person*
PROMED MANAGEMENT INC

(Last) (First) (Middle)
125 CAMBRIDGEPARK DR

(Street)
CAMBRIDGE MA 02104

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director 10% Owner
Officer (give title below) X Other (specify below)
Joint Filer
1. Name and Address of Reporting Person*
PROMED OFFSHORE FUND, LTD

(Last) (First) (Middle)
125 CAMBRIDGEPARK DRIVE

(Street)
CAMBRIDGE MA 02140

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director 10% Owner
Officer (give title below) X Other (specify below)
Joint Filer
1. Name and Address of Reporting Person*
PROMED OFFSHORE FUND II, LTD

(Last) (First) (Middle)
125 CAMBRIDGEPARK DRIVE

(Street)
CAMBRIDGE MA 02140

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer
Director 10% Owner
Officer (give title below) X Other (specify below)
Joint Filer
Explanation of Responses:
1. The reported purchase of 25,000 shares of the Issuer was made on behalf of the account of ProMed Offshore II Fund, Ltd., a private investment fund (which as of the date of this Form 4, owns 58,000 shares of the Issuer), the Investment Manager of which is ProMed Management, Inc. ("ProMed Management"). ProMed Management is controlled by David B. Musket and Barry Kurokawa. The remainder of the reported amount of securities beneficially owned following the reported transaction may be deemed to be beneficially owned as follows: (A) 455,480 shares of the Issuer owned by and held in the account of ProMed Partners, L.P., whose general partner is ProMed Asset Management, L.L.C. ("ProMed Asset Management"), which is controlled by David B. Musket and Barry Kurokawa; See foot note 2.
2. (B) 83,986 shares of the Issuer owned by and held in the account of ProMed Partners II, L.P., whose general partner is also ProMed Asset Management; (C) 73,564 shares of the Issuer owned by and held in the account of ProMed Offshore Fund, Ltd., whose investment manager is ProMed Management; (D) 120,942 shares of the Issuer owned directly by David B. Musket; and (E) 1,533 shares of the Issuer owned directly by Barry Kurokawa. Each Reporting Person disclaims beneficial ownership of the reported securities except to the extent of his or its pecuniary interest therein, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.
David B. Musket 05/19/2005
** 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.
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