Enzon Pharmaceuticals Inc Watch

from SC 13G/A 1 page Exhibit 1.1 Joint Filing Agreement the Undersigned Hereby Agree That the Statement on Schedule 13g/A, Dated February 10, 2003 (The "Schedule 13g/A"), With Respect to the Common Stock, $.001 Par Value, of Enzon Inc. Is, and Any Amendments Thereto Executed by Each of US Shall Be, Filed on Behalf of Each of US Pursuant to and in Accordance With the Provisions of Rule 13d-1(k) Under the Securities and Exchange Act of 1934, as Amended, and That This Agreement Shall Be Included as an Exhibit to the Schedule 13g/a and Each Such Amendment. Each of the Undersigned Agrees to Be Responsible for the Timely Filing of the Schedule 13g/a and Any Amendments Thereto, and for the Completeness and Accuracy of the Information Concerning Itself Contained Therein. This Agreement May Be Executed in Any Number of Counterparts, All of Which Taken Together Shall Constitute One and the Same Instrument. in Witness Whereof, the Undersigned Have Executed This Agreement as of the 10th Day of February, 2003. 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 By: /S/ Samuel D. Isaly Name: Samuel D. Isaly

from SC 13G/A 1 page Exhibit 1.1 Joint Filing Agreement the Undersigned Hereby Agree That the Statement on Schedule 13g/A, Dated February 10, 2003 (The "Schedule 13g/A"), With Respect to the Common Stock, $.001 Par Value, of Enzon Inc. Is, and Any Amendments Thereto Executed by Each of US Shall Be, Filed on Behalf of Each of US Pursuant to and in Accordance With the Provisions of Rule 13d-1(k) Under the Securities and Exchange Act of 1934, as Amended, and That This Agreement Shall Be Included as an Exhibit to the Schedule 13g/a and Each Such Amendment. Each of the Undersigned Agrees to Be Responsible for the Timely Filing of the Schedule 13g/a and Any Amendments Thereto, and for the Completeness and Accuracy of the Information Concerning Itself Contained Therein. This Agreement May Be Executed in Any Number of Counterparts, All of Which Taken Together Shall Constitute One and the Same Instrument. in Witness Whereof, the Undersigned Have Executed This Agreement as of the 10th Day of February, 2003. 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 By: /S/ Samuel D. Isaly Name: Samuel D. Isaly

from SC 13G/A 1 page Exhibit 1.1 Joint Filing Agreement the Undersigned Hereby Agree That the Statement on Schedule 13g/A, Dated February 10, 2003 (The "Schedule 13g/A"), With Respect to the Common Stock, $.001 Par Value, of Enzon Inc. Is, and Any Amendments Thereto Executed by Each of US Shall Be, Filed on Behalf of Each of US Pursuant to and in Accordance With the Provisions of Rule 13d-1(k) Under the Securities and Exchange Act of 1934, as Amended, and That This Agreement Shall Be Included as an Exhibit to the Schedule 13g/a and Each Such Amendment. Each of the Undersigned Agrees to Be Responsible for the Timely Filing of the Schedule 13g/a and Any Amendments Thereto, and for the Completeness and Accuracy of the Information Concerning Itself Contained Therein. This Agreement May Be Executed in Any Number of Counterparts, All of Which Taken Together Shall Constitute One and the Same Instrument. in Witness Whereof, the Undersigned Have Executed This Agreement as of the 10th Day of February, 2003. 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 By: /S/ Samuel D. Isaly Name: Samuel D. Isaly

from SC 13G 1 page Ex-1.1 Otherdoc 2 0002.txt Joint Filing Agreement Exhibit 1.1 Joint Filing Agreement the Undersigned Hereby Agree That the Statement on This Schedule 13g, Dated June 20, 2002, (The "Schedule 13g"), With Respect to the Common Stock, $.01 Par Value Per Share, of Enzon, Inc. Is Filed on Behalf of Each of US Pursuant to and in Accordance With the Provisions of Rule 13d-1(k) Under the Securities and Exchange Act of 1934, as Amended, and That This Agreement Shall Be Included as an Exhibit to This Schedule 13g. Each of the Undersigned Agrees to Be Responsible for the Timely Filing of the Schedule 13g, and for the Completeness and Accuracy of the Information Concerning Itself Contained Therein. This Agreement May Be Executed in Any Number of Counterparts, All of Which Taken Together Shall Constitute One and the Same Instrument. in Witness Whereof, the Undersigned Have Executed This Agreement as of the 20th Day of June, 2002. 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

from SC 13G 1 page Ex-1.1 Otherdoc 2 0002.txt Joint Filing Agreement Exhibit 1.1 Joint Filing Agreement the Undersigned Hereby Agree That the Statement on This Schedule 13g, Dated June 20, 2002, (The "Schedule 13g"), With Respect to the Common Stock, $.01 Par Value Per Share, of Enzon, Inc. Is Filed on Behalf of Each of US Pursuant to and in Accordance With the Provisions of Rule 13d-1(k) Under the Securities and Exchange Act of 1934, as Amended, and That This Agreement Shall Be Included as an Exhibit to This Schedule 13g. Each of the Undersigned Agrees to Be Responsible for the Timely Filing of the Schedule 13g, and for the Completeness and Accuracy of the Information Concerning Itself Contained Therein. This Agreement May Be Executed in Any Number of Counterparts, All of Which Taken Together Shall Constitute One and the Same Instrument. in Witness Whereof, the Undersigned Have Executed This Agreement as of the 20th Day of June, 2002. 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

from SC 13G 1 page Ex-1.1 Otherdoc 2 0002.txt Joint Filing Agreement Exhibit 1.1 Joint Filing Agreement the Undersigned Hereby Agree That the Statement on This Schedule 13g, Dated June 20, 2002, (The "Schedule 13g"), With Respect to the Common Stock, $.01 Par Value Per Share, of Enzon, Inc. Is Filed on Behalf of Each of US Pursuant to and in Accordance With the Provisions of Rule 13d-1(k) Under the Securities and Exchange Act of 1934, as Amended, and That This Agreement Shall Be Included as an Exhibit to This Schedule 13g. Each of the Undersigned Agrees to Be Responsible for the Timely Filing of the Schedule 13g, and for the Completeness and Accuracy of the Information Concerning Itself Contained Therein. This Agreement May Be Executed in Any Number of Counterparts, All of Which Taken Together Shall Constitute One and the Same Instrument. in Witness Whereof, the Undersigned Have Executed This Agreement as of the 20th Day of June, 2002. 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

from 8-A12G ~50 pages Rights Agreement

from S-3/A 1 page Underwriting agreement

from S-3/A ~20 pages Underwriting agreement

from S-3/A ~50 pages Common Stock Purchase Agreement

from S-3 ~50 pages Common Stock Purchase Agreement