UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Amendment #1 Under the Securities Exchange Act of 1934 Intuitive Surgical Inc. ------------------------------------------------------------------------------ (Name of Issuer) Common Stock, par value $.001 per share ------------------------------------------------------------------------------ (Title of Class of Securities) 46120E602 -------------------------------------------- (CUSIP Number) November 17, 2005 ------------------------------------------------------------------------------ (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) *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.46120E602 SCHEDULE 13G Page 2 of 5 Pages ------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON North Sound Capital LLC (1) ------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [x] (b) [ ] ------------------------------------------------------------------------------- 3 SEC USE ONLY ------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware ------------------------------------------------------------------------------- 5 SOLE VOTING POWER 0 NUMBER OF ------------------------------------------------------- SHARES 6 SHARED VOTING POWER BENEFICIALLY 0 OWNED BY ------------------------------------------------------- EACH 7 SOLE DISPOSITIVE POWER REPORTING 0 PERSON ------------------------------------------------------- WITH 8 SHARED DISPOSITIVE POWER 0 ------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 ------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] ------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 0.00% ------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* OO ------------------------------------------------------------------------------- (1) The Reporting Person may be deemed the beneficial owner of the shares in its capacity as the managing member of North Sound Legacy Institutional Fund LLC and the investment advisor of North Sound Legacy International Ltd. (the "Funds"), who are the holders of such shares. As the managing member or investment advisor, respectively, of the Funds, the Reporting Person has voting and investment control with respect to the shares of common stock held by the Funds. The ultimate managing member of North Sound Capital LLC, the Reporting Person, is Thomas McAuley. ------------------------------------------------------------------------------- CUSIP No. 46120E602 SCHEDULE 13G Page 3 of 5 Pages ------------------------------------------------------------------------------- Item 1(a). Name of Issuer: Intuitive Surgical Inc. Item 1(b). Address of Issuer's Principal Executive Offices: 950 Kifer Rd. Sunnyvale, CA 94086 Item 2(a). Name of Person Filing. Item 2(b). Address of Principal Business Office or, if None, Residence. Item 2(c). Citizenship. North Sound Capital LLC 20 Horseneck Lane Greenwich, CT 06830 Delaware limited liability company Item 2(d). Title of Class of Securities: Common Stock, par value $.001 per share Item 2(e). CUSIP Number: 46120E602 Item 3. If this statement is filed pursuant to ss.ss.240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: Not Applicable Item 4. Ownership. The following is information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1 as of November 17, 2005: (a) Amount beneficially owned: 0 (b) Percent of Class:0.00% (c) Number of shares as to which such person has: (i) sole power to vote or direct the vote: 0 (ii) shared power to vote or direct the vote: 0 ------------------------------------------------------------------------------- CUSIP No. 46120E602 SCHEDULE 13G Page 4 of 5 Pages ------------------------------------------------------------------------------- (iii) sole power to dispose or direct the disposition of: 0 (iv) shared power to dispose or direct the disposition of: 0 Item 5. Ownership of Five Percent or Less of a Class. [X] 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. Certification pursuant to ss.240.13d-1(c): 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. ------------------------------------------------------------------------------- CUSIP No. 46120E602 SCHEDULE 13G Page 5 of 5 Pages ------------------------------------------------------------------------------- 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: November 22, 2005 NORTH SOUND CAPITAL LLC By: /s/Thomas McAuley Name: Thomas McAuley Title: Chief Investment Officer