-----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, GUxPFV0VeGgGxPtLh5JtYwXp0zTc6qh6jDiXet1vITRVpNZJrxnMGXYfG0SrscZV crJHAVP32B444HTrLz5qeQ== 0001306923-06-000028.txt : 20060502 0001306923-06-000028.hdr.sgml : 20060502 20060501202210 ACCESSION NUMBER: 0001306923-06-000028 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20060502 DATE AS OF CHANGE: 20060501 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: ADVANCED MAGNETICS INC CENTRAL INDEX KEY: 0000792977 STANDARD INDUSTRIAL CLASSIFICATION: IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835] IRS NUMBER: 042742593 STATE OF INCORPORATION: DE FISCAL YEAR END: 0930 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-38286 FILM NUMBER: 06796900 BUSINESS ADDRESS: STREET 1: 125 CAMBRIDGEPARK DRIVE, 6TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02140 BUSINESS PHONE: 6174972070 MAIL ADDRESS: STREET 1: 125 CAMBRIDGEPARK DRIVE, 6TH FLOOR CITY: CAMBRIDGE STATE: MA ZIP: 02140 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: Palo Alto Investors, LLC CENTRAL INDEX KEY: 0001306923 IRS NUMBER: 770558164 STATE OF INCORPORATION: CA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 470 UNIVERSITY AVE CITY: PALO ALTO STATE: CA ZIP: 94301 BUSINESS PHONE: 650-325-0772 MAIL ADDRESS: STREET 1: 470 UNIVERSITY AVE CITY: PALO ALTO STATE: CA ZIP: 94301 SC 13G 1 advancedmagneticsinc.txt ADVANCED MAGNETICS INC SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ----------------- SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b) (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(b) (Amendment No. _A_)* Advanced Magnetics Inc - --------------------------------------------------------------------------- (Name of Issuer) Common Shares - ---------------------------------------------------------------------------- (Title of Class of Securities) ------------------------------ (CUSIP Number) ------------------------------ May 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: [ ] Rule 13d-1(b) [X] Rule 13d-1(c) [ ] Rule 13d-1(d) Page 1 of 5 ----------------------------------------- * 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 disclosures provided in a prior cover page. The information required on 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). SCHEDULE 13G CUSIP No. Page 2 of 5 Pages ------------------------------------------------------------------------ 1. NAMES OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS PALO ALTO INVESTORS ------------------------------------------------------------------------ 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ] ------------------------------------------------------------------------ 3. SEC USE ONLY ------------------------------------------------------------------------ 4. Citizenship or Place of Organization United States ------------------------------------------------------------------------ 5. SOLE VOTING POWER 855,100 NUMBER SHARES --------------------------------------------------------- BENEFICIALLY 6. SHARED VOTING POWER OWNED BY EACH --------------------------------------------------------- REPORTING 7. SOLE DISPOSITIVE POWER PERSON --------------------------------------------------------- 8. SHARED DISPOSITIVE POWER ------------------------------------------------------------------------ 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON ------------------------------------------------------------------------ 10. CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] ------------------------------------------------------------------------ 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 7.57% ------------------------------------------------------------------------ 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) ------------------------------------------------------------------------ IA ------------------------------------------------------------------------ *SEE INSTRUCTIONS BEFORE FILLING OUT! ** See Item 4. Page 3 of 5 Item 1(a). Name of Issuer: Advanced Magnetics Inc Item 1(b). Address of Issuers's Principal: 125 Cambridgepark Dr. 6th Fl Executive Offices: Cambridge, MA 02140 Item 2(a). Name of Person Filing: David Banerjee Palo Alto Investors Item 2(b). Address of Principal Business Office or, if None, Residence: 470 University Avenue, Palo Alto California 94301 Item 2(c). Citizenship: U.S.A. Item 2(d). Title of Class of Securities: Common Shares Item 2(e). CUSIP Number: Item 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b) OR 13d-2(b) or (c), CHECK WHETHER THE PERSON FILING IS A: (e) An investment adviser in accordance with 240.13-1(b)(10(ii)(E) Item 4. OWNERSHIP (a) 855,100 (b) 7.57% (c) (i) sole voting power: 855,100 (ii) shared voting power: (iii) sole dispositive power: (iv) shared dispositive power: Item 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS: Not Applicable Item 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON: Holding of more than 5% Item 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY: Not Applicable Page 4 of 5 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 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. Page 5 of 5 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. Dated: May 1, 2006 /s/ David Banerjee ------------------------ Palo Alto Investors -----END PRIVACY-ENHANCED MESSAGE-----