-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, DhJTaZvdCgzgWKRGVluW+w29l9m5VFID/VVDJ6dP5w29prBDwtJztODHl/E9lLdC VA6DTUeYcJ6BGr5HWE9PqA== 0001172661-06-000284.txt : 20060807 0001172661-06-000284.hdr.sgml : 20060807 20060807122512 ACCESSION NUMBER: 0001172661-06-000284 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20060807 DATE AS OF CHANGE: 20060807 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: ENZON PHARMACEUTICALS INC CENTRAL INDEX KEY: 0000727510 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] IRS NUMBER: 222372868 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-35587 FILM NUMBER: 061008025 BUSINESS ADDRESS: STREET 1: 685 ROUTE 202/206 CITY: BRIDGEWATER STATE: NJ ZIP: 08807 BUSINESS PHONE: 908 541 8711 MAIL ADDRESS: STREET 1: 685 ROUTE 202/206 STREET 2: ATT: GENERAL COUNSEL CITY: BRIDGEWATER STATE: NJ ZIP: 08807 FORMER COMPANY: FORMER CONFORMED NAME: ENZON PHARMACEUTICALS INC DATE OF NAME CHANGE: 20021211 FORMER COMPANY: FORMER CONFORMED NAME: ENZON PHARMACEUTICAL INC DATE OF NAME CHANGE: 20021210 FORMER COMPANY: FORMER CONFORMED NAME: ENZON INC DATE OF NAME CHANGE: 19920703 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: ORBIMED ADVISORS LLC CENTRAL INDEX KEY: 0001055951 IRS NUMBER: 133976876 STATE OF INCORPORATION: DE FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 767 3RD AVENUE STREET 2: 30TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 BUSINESS PHONE: 2126845700 MAIL ADDRESS: STREET 1: 767 3RD AVENUE STREET 2: 30TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10017 SC 13G/A 1 enzn0806.txt SCHEDULE 13G HOLDINGS REPORT AMENDMENT UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 3) Enzon Pharmaceuticals Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 293904108 (CUSIP Number) August 1, 2006 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [x] Rule 13d-1(b) [ ] 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 the disclosures provided in a prior cover page. The information required in 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). CUSIP No. 293904108 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). OrbiMed Advisors LLC 2. Check the Appropriate Box if a Member Of a Group (See Instructions) [ ] (a) [ ] (b) 3. SEC Use Only 4. Citizenship or Place of Organization Delaware 5. Sole Voting Power: 0 Number of Shares 6. Shared Voting Power: 440,500 Beneficially Owned by 7. Sole Dispositive Power: 0 Each Reporting Person With 8. Shared Dispositive Power: 440,500 9. Aggregate Amount Beneficially Owned by Each Reporting Person 440,500 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) 11. Percent of Class Represented by Amount in Row (9) 1.01% 12. Type of Reporting Person (See Instructions) IA CUSIP No. 293904108 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). OrbiMed Capital LLC 2. Check the Appropriate Box if a Member of a Group (See Instructions) [ ] (a) [ ] (b) 3. SEC Use Only 4. Citizenship or Place of Organization Delaware 5. Sole Voting Power: 0 Number of Shares 6. Shared Voting Power: 0 Beneficially Owned by 7. Sole Dispositive Power: 0 Each Reporting Person With 8. Shared Dispositive Power: 0 9. Aggregate Amount Beneficially Owned by Each Reporting Person 0 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) 11. Percent of Class Represented by Amount in Row (9) 0% 12. Type of Reporting Person (See Instructions) IA CUSIP No. 293904108 1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only). Samuel D. Isaly 2. Check the Appropriate Box if a Member of a Group (See Instructions) [ ] (a) [ ] (b) 3. SEC Use Only 4. Citizenship or Place of Organization United States 5. Sole Voting Power: 0 Number of Shares 6. Shared Voting Power: 440,500 Beneficially Owned by 7. Sole Dispositive Power: 0 Each Reporting Person With 8. Shared Dispositive Power: 440,500 9. Aggregate Amount Beneficially Owned by Each Reporting Person: 440,500 10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) 11. Percent of Class Represented by Amount in Row (9) 1.01% 12. Type of Reporting Person (See Instructions) HC Item 1. (a) Issuer: Enzon Pharmaceuticals Inc. 1. Address: 685 ROUTE 202/206 BRIDGEWATER NJ 08807 Item 2. (a) Name of Person Filing: OrbiMed Advisors LLC OrbiMed Capital LLC Samuel D. Isaly (b) Address of Principal Business Offices: 767 Third Avenue, 30th Floor New York, New York 10017 (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: 293904108 Item 3. OrbiMed Advisors LLC and OrbiMed Capital LLC are investment advisors in accordance with ss.240.13d-1(b)(1)(ii)(E). Samuel D. Isaly is a control person in accordance with ss.240.13d-1(b)(1)(ii)(G). Item 4. Ownership Please see Items 5 - 9 and 11 for each cover sheet for each filing separately Item 5. Ownership of Five Percent or Less of a Class Reporting persons are holding 1.01% (1.01% in the case of OrbiMed Advisors LLC and 0% in the case of OrbiMed Capital LLC) of the securities on behalf of other persons who have the right to receive or the power to direct the receipt of dividends from, or proceeds from sale of, such securities. No one such other person's interest in the securities whose ownership is reported here relates to more than five percent of the class. OrbiMed Advisors LLC holds shares on behalf of Eaton Vance Worldwide Health Sciences (434,700 shares) and Eaton Vance Variable Trust (5,800 shares). 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 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 acquired and held in the ordinary course of business and 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. 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: August 7, 2006 OrbiMed Advisors LLC By: /s/ Samuel D. Isaly -------------------------- Name: Samuel D. Isaly Title: President OrbiMed Capital LLC By: /s/ Samuel D. Isaly -------------------------- Name: Samuel D. Isaly Title: Managing Member By: /s/ Samuel D. Isaly -------------------------- Name: Samuel D. Isaly JOINT FILING AGREEMENT The undersigned hereby agree that the Statement on this Schedule 13G/A, dated August 7, 2006, (the "Schedule 13G/A"), with respect to the Common Stock, par value $.001 per share, of Enzon Pharmaceuticals 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/A. Each of the undersigned agrees to be responsible for the timely filing of the Schedule 13G/A, 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 7th day of August 2006. OrbiMed Advisors LLC By: /s/ Samuel D. Isaly --------------------------- Name: Samuel D. Isaly Title: Managing Member OrbiMed Capital LLC By: /s/ Samuel D. Isaly -------------------------- Name: Samuel D. Isaly Title: Managing Member By: /s/ Samuel D. Isaly ---------------------------- Name: Samuel D. Isaly Statement of Control Person The Statement on this Schedule 13G/A dated August 7, 2006 with respect to the common stock, $.001 par value per share, of Enzon Pharmaceuticals Inc. is filed by Samuel D. Isaly in accordance with the provisions of Rule 13d-1(b) and Rule 13d-1(k),respectively, as control person (HC) of OrbiMed Advisors LLC and OrbiMed Capital LLC. OrbiMed Advisors LLC and OrbiMed Capital LLC file this statement on Schedule 13G/A in accordance with the provisions of Rule 13d-1(b) and Rule 13d-1(k), respectively, as investment advisors (IA). -----END PRIVACY-ENHANCED MESSAGE-----