UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON D.C. 20549

FORM 10-K/A

AMENDMENT NO. 1

FOR ANNUAL AND TRANSITION REPORTS PURSUANT TO SECTION 13 OR 15(d)OF THE SECURITIES EXCHANGE ACT OF 1934

[X] Annual report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934For the fiscal year ended December 31, 2005

OR

[  ] Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from _______to________.

Commission file no. 0-23791___________________SONOSITE, INC.(Exact name of registrant as specified in its charter)

Washington

91-1405022(State or other jurisdiction

(I.R.S. Employerof incorporation or organization)

Identification Number)21919 30th Drive S.E.Bothell, WA 98021-3904(425) 951-1200 (Address and telephone number of registrants principal executive offices)


Securities registered pursuant to Section 12(b) of the Act:None

Securities registered pursuant to Section 12(g) of the Act:Common stock, $0.01 par value

Indicate by check mark if the registrant is a well-known seasoned issuer (as defined in Rule 405 of the Securities Act) Yes [  ] No [X]

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes [X] No [  ]

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes [X] No [  ]

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrants knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [  ]

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer or a non-accelerated filer (as defined in Rule 12b-2 of the Exchange Act)   Large accelerated filer [  ] Accelerated filer [ X ] Non-accelerated filer [  ]

Indicate by check mark whether the registrant is a shell company (as defined in Exchange Act Rule 12b-2). Yes [  ] No [X]

The aggregate market value of the voting stock held by nonaffiliates of the registrant, based on the closing sale price of the registrants Common Stock on June 30, 2005 as reported on the Nasdaq National Market, was $477,107,800.

As of February 28, 2006, there were 16,150,420 shares of the registrants Common Stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

The information required by Part III of this report, to the extent not set forth herein, is incorporated by reference from the registrants definitive proxy statement relating to the annual meeting of shareholders to be held in 2006, which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.

---

EXPLANATORY PARAGRAPH



We are filing this amendment to Form 10-K for the fiscal year ended December 31, 2005, filed with the Securities and Exchange Commission on March 16, 2006 to add the electronic signature of our independent registered public accounting firm, KPMG LLP, to the
following reports:

•      The Report of Independent Registered Public Accounting Firm on the consolidated financial statements and the financial statement schedule listed in Item 15(a)

•     The Report of Independent Registered Public Accounting Firm on management’s assessment of internal control over financial reporting, and the effectiveness of the Company’s internal control over financial reporting as of December 31, 2005

•      The Consent of KPMG LLP, Independent Registered Public Accounting Firm in Exhibit 23.1



The omission was due to an inadvertent printing error.


ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA  REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors and Shareholders
SonoSite, Inc.: We have audited the accompanying consolidated balance sheets of SonoSite, Inc. and subsidiaries as of December 31, 2005 and 2004, and the related consolidated statements of operations, cash flows and shareholders’ equity and comprehensive income (loss) for
each of the years in the three-year period ended December 31, 2005. In connection with our audits of the consolidated financial statements, we also have audited the financial statement schedule listed in Item 15(a). These consolidated financial statements and the
financial statement schedule are the responsibility of SonoSite, Inc.’s management. Our responsibility is to express an opinion on these consolidated financial statements and the financial statement schedule based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of SonoSite, Inc. and subsidiaries as of December 31, 2005 and 2004, and the results of their operations and their cash flows
for each of the years in the three-year period ended December 31, 2005, in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic consolidated financial
statements taken as a whole, presents fairly, in all material respects, the information set forth therein. We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the effectiveness of SonoSite, Inc.’s internal control over financial reporting as of December 31, 2005, based on criteria established in
Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), and our report dated March 15, 2006 expressed an unqualified opinion on management’s assessment of, and the effective operation
of, internal control over financial reporting.  /s/ KPMG LLP Seattle, Washington
March 15, 2006  REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors and Shareholders
SonoSite, Inc.: We have audited management’s assessment, included in the accompanying management’s report on internal control over financial reporting (Item 9A(b)), that SonoSite, Inc. and subsidiaries (the Company) maintained effective internal control over financial
reporting as of December 31, 2005, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is responsible for maintaining
effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting. Our responsibility is to express an opinion on management’s assessment and an opinion on the effectiveness of the
Company’s internal control over financial reporting based on our audit. We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over
financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, evaluating management’s assessment, testing and evaluating the design and operating effectiveness of
internal control, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion. A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally
accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and
dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of
the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets
that could have a material effect on the financial statements. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of
changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. In our opinion, management’s assessment that the Company maintained effective internal control over financial reporting as of December 31, 2005, is fairly stated, in all material respects, based on criteria established in Internal Control—Integrated
Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Also, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2005, based on criteria
established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). We have also audited in accordance with the standards of the Public Company Accounting Oversight Board (United States) the consolidated balance sheets of the Company as of December 31, 2005 and 2004, and the related consolidated statements of operations, cash
flows and shareholder’s equity and comprehensive income (loss) for each of the years in the three-year period ended December 31, 2005, and our report dated March 15, 2006 expressed an unqualified opinion on those consolidated financial statements. /s/ KPMG LLP  Seattle, Washington
March  15, 2006