10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

þ	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the fiscal year ended March 31, 2007
OR
o	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the transition period from          to

Commission file number: 000-51323

Micrus Endovascular Corporation

(Exact name of registrant as specified in its charter)

Delaware	23-2853441
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)
821 Fox Lane	95131
San Jose, California	(Zip Code)
(Address of principal executive offices)

(408) 433-1400

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class	Name of Each Exchange on Which Registered
Common Stock, $0.01 par value per share	The NASDAQ Stock Market, LLC

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

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.  Yes o     No þ

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

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 þ     No o

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 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.  o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act.

Large accelerated filer o     Accelerated filer þ     Non-accelerated filer o

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

As of September 29, 2006, the aggregate market value of the registrant’s common stock held by non-affiliates of the registrant was $130.0 million based on the closing sale price of such stock as reported on the National Association of Securities Dealers Automated Quotation System National Market System. Shares of common stock held by each officer and director as of that date and by each person who owned 5% or more of the registrant’s outstanding common stock as of September 29, 2006 have been excluded in that such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for other purposes.

As of May 31, 2007 registrant had outstanding 15,337,119 shares of common stock, $0.01 par value per share.

DOCUMENTS INCORPORATED BY REFERENCE

The Registrant has incorporated by reference portions of its Proxy Statement for its 2007 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days after the close of the fiscal year covered by this annual report.

MICRUS ENDOVASCULAR CORPORATION

TABLE OF CONTENTS

			Page
PART I
	Item 1.	Business		1
	Item 1A.	Risk Factors		18
	Item 1B.	Unresolved Staff Comments		33
	Item 2.	Properties		34
	Item 3.	Legal Proceedings		34
	Item 4.	Submission of Matters to a Vote of Security Holders		35
PART II
	Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters, and Issuer Purchases of Equity Securities		35
	Item 6.	Selected Financial Data		39
	Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		40
	Item 7A.	Quantitative and Qualitative Disclosures about Market Risk		53
	Item 8.	Financial Statements and Supplementary Data		54
	Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure		91
	Item 9A.	Controls and Procedures		91
	Item 9B.	Other Information		92
PART III
	Item 10.	Directors and Executive Officers of the Registrant		92
	Item 11.	Executive Compensation		92
	Item 12.	Security Ownership of Certain Beneficial Owners and Management		92
	Item 13.	Certain Relationships and Related Transactions		92
	Item 14.	Principal Accountant Fees and Services		92
PART IV
	Item 15.	Exhibits and Financial Statement Schedules		92
SIGNATURES				93
EXHIBIT 21.1
EXHIBIT 23.1
EXHIBIT 31.1
EXHIBIT 31.2
EXHIBIT 32.1

FORWARD-LOOKING STATEMENTS

Certain information contained in or incorporated by reference in this Report contains forward-looking statements that involve risks and uncertainties. The statements contained in this Report that are not purely historical are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including statements regarding our expectations, beliefs, intentions or strategies regarding the future. All forward-looking statements included in this Report are based on information available to us on the date hereof, and we assume no obligation to update any such forward-looking statements. Our actual results could differ materially from those discussed herein. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in Item 1A, Risk Factors, and elsewhere in this Report. References herein to “Micrus,” “the Company,” “we,” “our,” “us” and similar words or phrases are references to Micrus Endovascular Corporation and its subsidiaries, unless the context otherwise requires. Unless otherwise provided in this Report, trademarks identified by (R) and ^tm are registered trademarks or trademarks, respectively, of Micrus Endovascular Corporation or its subsidiaries. All other trademarks are the properties of their respective owners.

PART I

Item 1.   Business.

The Company

We develop, manufacture and market both implantable and disposable medical devices used in the treatment of cerebral vascular diseases. Our products are used by interventional neuroradiologists, interventional neurologist and neurosurgeons primarily to treat cerebral aneurysms responsible for hemorrhagic stroke. We recently launched the first of our line of products designed to treat ischemic disease. Hemorrhagic and ischemic stroke are both significant causes of death and disability worldwide.

Our product lines consist of endovascular systems that enable a physician to gain access to the brain in a minimally invasive manner through the vessels of the arterial system. We believe our products provide a safe and reliable alternative to more invasive neurosurgical procedures for treating aneurysms. Our proprietary three-dimensional, embolic coils are unique in that they anatomically and rapidly deploy within an aneurysm, forming a scaffold that conforms to a wide diversity of aneurysm shapes and sizes. In addition, our Cerecyte(R) microcoil product line incorporates an absorbable material called polyglycolic acid (PGA), bioactive filaments which reside within the central lumen of our microcoils. We believe based on limited data bioactive filaments may promote faster aneurysm healing and may reduce the risk of recanalization or retreatment.

We are expanding our product line beyond microcoils and access systems, and in January 2006, we entered into a license, development and distribution agreement with Biotronik AG which provides us with exclusive access to certain stent technologies for neurovascular applications. In February 2006, Biotronik received CE Mark clearances for the Pharos^tm stent for both the treatment of cerebral aneurysms and the treatment of ischemic disease. In March 2006 we launched our Pharos stent in certain countries that recognize the CE Mark, providing us with our first commercial product for the treatment of ischemic disease. We plan to pursue regulatory clearance in the United States for our Pharos stent, which we believe represents a significant market opportunity for us.

We recently launched an access system, which includes microcatheters and guidewires used primarily to deliver microcoils and stents for the treatment of cerebral vascular disease.

We have substantially increased the size of our sales and marketing organization in the past 18 months, and currently market our products through a direct sales force in the United States, Canada, England, Germany and France. We market through a network of distributors covering the major markets in the rest of Europe, Latin America, Asia and the Middle East, and entered an exclusive distribution agreement with Goodman, CO., LTD (“Goodman”) to market our products in the Japanese market. We are currently seeking regulatory clearance to enter the Chinese market and are evaluating potential distribution partners to commercialize our products in China.

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We have executive offices in San Jose, California and sales offices in Switzerland and the United Kingdom as well as a development and manufacturing facility in Doral, Florida. We were incorporated under the laws of the State of Delaware in 1996.

On November 30, 2006, we completed the acquisition of VasCon LLC (“VasCon”), a privately held company engaged in the development and manufacture of vascular access and delivery devices. The acquisition of VasCon adds expertise in developing clinically advanced access and catheter systems to our core competencies and provides us with manufacturing capabilities that are expected to lead to cost reductions for a wide range of our products. VasCon’s existing cardio and peripheral vascular products will continue to be sold through non-Micrus distribution channels. Micrus Design Technology, Inc., a newly formed subsidiary, will develop and manufacture neurovascular access and delivery products for us, including our steerable catheter. See Note 3 of “Notes to Consolidated Financial Statements” for additional information related to this acquisition.

Information on revenues, gross profits and total assets for our business segments and by geographic area appears in Note 10 of “Notes to Consolidated Financial Statements” for the year ended March 31, 2007, which are included in Item 8 of this report and are incorporated herein by reference.

Industry Overview

Stroke is a condition resulting from a sudden disruption of blood flow to the brain. If deprived of oxygen the brain tissue soon becomes injured, often resulting in irreversible neurological impairment or death. Strokes consist of either ruptures (hemorrhagic stroke) or blockages (ischemic stroke) of vessels within or leading to the brain. According to the American Heart Association, stroke is the third leading cause of death in the United States. Patients who survive a stroke are often left with disabilities, including paralysis, coma, impaired cognition, decreased coordination, loss of visual acuity, loss of speech, loss of sensation or some combination of these conditions. A significant need for effective prevention of stroke exists because of the severity of the disorder, its prevalence in society, the shortcomings of current therapies and the high cost of treatment and care.

One cause of hemorrhagic stroke is the rupture of cerebral aneurysms. A cerebral aneurysm is an outward bulging of an artery in the brain that can develop at weak points in the arterial wall. In some cases, the patient will experience symptoms such as headache, blurred vision or dizziness as the aneurysm grows, but in many cases patients will have no symptoms. The most devastating complication of a cerebral aneurysm occurs when the aneurysm ruptures, decreasing blood flow to brain tissue and leading to increased pressure on the brain. Rupture of a cerebral aneurysm typically occurs suddenly and without warning, often leading to catastrophic brain injury or death.

Historically, patients diagnosed with a cerebral aneurysm underwent a craniotomy and aneurysmal clipping, a highly-invasive surgical procedure in which a neurosurgeon creates an opening in the skull, dissects or retracts brain tissue to gain access to the aneurysm, and places a metal clip at the base of the aneurysm to stop further blood flow into the aneurysm, halting its growth and preventing future rupture. This procedure is typically performed by a neurosurgeon at a specialized hospital or medical center. Aneurysmal clipping requires a lengthy recovery time, and has the significant expense, morbidity and complication risks associated with a major neurosurgical procedure.

In the 1990s interventional neuroradiologists and to a lesser extent neurosurgeons, who collectively are referred to in the industry as “neurointerventionalists,” started using an alternative procedure to clipping, known as embolic coiling, to treat cerebral aneurysms. Rather than reaching the aneurysm by opening the skull and moving aside the brain tissue, access to the aneurysm in an embolic coiling procedure is obtained through a catheterization procedure in which the physician inserts a guide wire followed by a catheter into the femoral artery of the upper leg and threads them under fluoroscopy through the arterial system to the brain and ultimately into the opening of the aneurysm. The neurointerventionalist then advances embolic coils through the microcatheter to fill the aneurysm. Embolic coils are small platinum coils that range in size from 2 mm to 20 mm and once released into the aneurysm assume complex shapes filling the aneurysm. The coils decrease or stop blood flow into the aneurysm, enabling formation of a clot and scar tissue which prevent further growth or rupture of the aneurysm. Since the mid-1990s, embolic coiling has become a more widely accepted treatment for cerebral aneurysms because it is a less invasive procedure that results in lower overall treatment cost, shorter recovery times, and less traumatic effect on the patient.

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In 2002, The Lancet, a leading medical journal, published the results of the International Subarachnoid Aneurysm Trial, an independent, randomized clinical trial involving 2,143 patients in Europe, North America and Australia that compared aneurysm clipping with embolic coiling as a method of treating cerebral aneurysms. Known as ISAT, this trial concluded, based on survey of patients published in The Lancet in October 2002, that among the patients participating in the trial, endovascular intervention with detachable platinum coils resulted in a 23% relative and 7% absolute reduction in the risk of major brain injury or death compared with neurosurgical clipping of the aneurysm at one year follow up. The seven-year follow up data published in The Lancet in September 2005 indicated a continued clinical advantage for patients whom underwent coiling versus clipping procedures.

Market Opportunity

According to the American Heart Association, approximately 700,000 strokes occur annually in the United States. Ischemic stroke affects approximately 615,000 patients annually while hemorrhagic stroke affects approximately 85,000 patients per year in the United States. We believe that a majority of the hemorrhagic strokes are caused by cerebral aneurysms. We believe embolic coiling is being used to treat approximately 35% of the patients diagnosed with cerebral aneurysms in the United States. Industry sources also indicate that approximately 60-65% of patients diagnosed with cerebral aneurysms in European countries are treated using embolic coiling procedures. We believe that embolic coiling procedures can be used to treat a similar percentage of patients with cerebral aneurysms in the United States as awareness grows among patients and physicians of the advantages of embolic coiling. Industry sources estimate that in Asia approximately 15% of patients are treated with embolic coiling. Industry sources further estimate that the worldwide endovascular device market for treatment of hemorrhagic stroke was approximately $400 million to $500 million in 2006.

We believe that growth drivers in the market for embolic coiling products include the overall trend towards less invasive procedures, an increased number of neurointerventionalists trained to perform embolic coiling procedures, and the aging population in whom aneurysms occur with greater frequency.

The key challenges of embolic coiling procedures are the following:

•  Access to the Aneurysm Site.  Specialized products are required to access the complex vasculature of the brain, properly access the aneurysm site and perform a coiling procedure. These access products include microcatheters and guidewires. In order to navigate the complex vascular anatomy of the brain, access products must have enough column strength to be pushed significant distances through this vasculature, yet flexible enough to travel to distal portions of the brain without injuring blood vessels.

•  Framing and Filling the Aneurysm.  In order to effectively treat an aneurysm, the interventionalist must fill the aneurysm with a sufficient volume of coils to disrupt blood flow and occlude the aneurysm. Aneurysms vary in shape and size and, consequently, neurointerventionalists seek an embolic coiling solution that enables coils to conform to the aneurysm’s shape without requiring extensive manipulation of the coil. Coils that frame, or conform to, the aneurysm wall reduce the risk of rupture and facilitate the retention of additional coils in the aneurysm.

•  Coverage of the Neck of the Aneurysm.  It is important to effectively cover the neck of the aneurysm with platinum coils to help reduce recanalization and ensure a better clinical outcome. Embolic coils that deploy in a random manner are less likely to adequately cover the neck of the aneurysm.

•  Deployment.  Once embolic coils are placed in the aneurysm, the interventionalist must be able to quickly and reliably deploy the coils from the device positioning unit within the microcatheter. Unreliable detachment mechanisms can lead to inadvertent retraction of the embolic coil as the interventionalist withdraws the positioning unit only to discover that the coil is still attached. Further, any delay in deployment may increases procedure time and its attendant risks.

•  Recanalization.  Industry sources estimate that recanalization, or the continued or renewed growth of the aneurysm, occurs in approximately 20 to 35% of aneurysms treated with embolic coiling. Experts believe that recanalization occurs due to incomplete filling of the aneurysm or disruption of the blood clot that fills the aneurysm following an embolic coiling procedure. Studies have shown that the recanalization rate is

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higher for patients treated with embolic coiling procedures compared to aneurysm clipping. Therefore, embolic coiling solutions that decrease recanalization rates are highly desirable.

•  Risk of Rupture.  Embolic coiling solutions that enhance safety and limit the risk of rupture or re-rupture in treatment of aneurysms are also essential. Successful framing and filling of the aneurysm requires precise placement of the embolic coil. Neurointerventionalists seek embolic coiling solutions that minimize stress on the aneurysm wall in the course of placing or repositioning the coil in order to reduce the risk of rupture.

The Micrus Solution

We are focused on a broad range of cerebral vascular treatments and have developed a proprietary embolic coiling solution, stents and access products that are designed to effectively access and treat cerebral aneurysms and ischemic disease. In addition, we have also developed a line of microcoils that incorporate bioactive materials which we believe may result in improved healing due to induced tissue response.

Our solutions have the following key features:

Self-Deploying Anatomically Conforming Coils.  Our proprietary spherical MicruSphere(R), Cashmere^tm and Presidio^tm microcoils deploy into a three-dimensional configuration that assumes an aneurysm’s shape upon deployment and are designed to provide uniform framing of the aneurysm. Our self-deploying microcoils require very little manipulation for effective placement, thereby reducing the need for microcoil manipulation and attendant stress on the aneurysm wall.

Enhanced Coverage of the Neck of the Aneurysm.  We believe effective neck coverage reduces the rate of recanalization. Our microcoils are designed to facilitate coverage of the neck of the aneurysm in two ways. First, the three dimensional configuration of our spherical MicruSphere, Cashmere and Presidio microcoils provide the framework to stabilize the neck of the aneurysm. Second, our UltiPaq(R) finishing coils are soft and flexible, permitting coverage across the neck of the aneurysm.

Unique Framing and Filling Technology.  Our Presidio 10 and 18 Microcoils are each a single, stretch resistant Cerecyte microcoil designed to deliver stable, predictable aneurysm framing and filling to increase coverage of the aneurysm wall and neck with a single coil deployment. As the Presidio 10 and 18 are also Cerecyte microcoils, their bioactive filament may also induce a beneficial tissue response. We believe that effective neck coverage may reduce the rate of recanalization and need for retreatment.

Deployment Technology.  Our proprietary electronic microcoil deployment system employs a resistive heating fiber deployment mechanism that enables a consistent five second deployment cycle, allowing neurointerventionalists to quickly and reliably deploy the microcoil. Our electronic microcoil deployment system has been designed so that microcoil deployment time remains consistent regardless of the number of coils used in the procedure. We believe that our electronic microcoil deployment system enables neurointerventionalists to more rapidly deploy microcoils and generally reduce procedure time.

Bioactive Technology.  Cerecyte is our proprietary microcoil product line that incorporates filaments comprised of polyglycolic acid (PGA)(R) within the lumen of our microcoils — MicruSphere, Presidio, HeliPaq(R) and UltiPaq. Initial data from single center studies presented at major scientific meetings suggest that Cerecyte may promote faster aneurysm healing and may reduce the risk of recanalization or retreatment. To improve on the scientific rigor of these early data points, we have initiated two post market studies, a prospective randomized trial and a registry, which will provide additional data regarding the potential benefits of Cerecyte.

Stent Platform.  Our Pharos^tm stent is a balloon-delivered device which enables the neurointerventionalist to deliver and deploy a stent in one step, eliminating the need for pre-dilation of the constricted vasculature. We believe this feature may reduce overall procedural time and cost. We believe the balloon catheter marker bands combined with the radiopacity of the stainless steel stent provide for excellent visibility resulting in improved accuracy of deployment. We also believe that the combination of Pharos’^tm Rapid Exchange Technology^tm and trackable tip will enable a physician to effectively access the tortuous and distal anatomy of the brain. In March 2006, we launched the Pharos stent in certain countries outside of the United States that recognize the CE Mark.

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Improved Access Products.  We recently launched an access product line which includes the Courier line of Microcatheters and the Watusi line of guidewires. We believe that our Courier microcatheters and Watusi guidewires will address the need of neurointerventionalists for more predictable and secure access to the complex and distal anatomy of the cerebral vasculature. In addition, we expect to launch our ENZO steerable microcatheter in the first fiscal quarter 2008.

Micrus Strategy

Our objective is to develop and commercialize innovative, minimally invasive medical devices that provide a comprehensive solution to physicians for the treatment of cerebral vascular diseases. The key elements of our strategy to achieve our objective include:

Expand Market Share of Our Microcoils through Continued Product Innovation.  We believe our line of microcoils offers a safer, more effective and less technically demanding embolic coiling system to neurointerventionalists which has resulted in the rapid growth of our revenues. We believe continued product innovations such as the introductions of our Cerecyte line of bioactive microcoils and the Presidio microcoil will allow us to grow market share. We are continuing to develop new technologies which we believe may further enhance aneurysm occlusion and reduce the rate of recanalization.

Increase Our Per-Procedure Revenues.  21% of our revenue has come from products which have launched in the past 18 months. This product line expansion includes new microcoils, as well as stents, microcatheters and guidewires that we believe increased our per-procedure revenue opportunity from approximately 40% to 80% of every procedure dollar.

Leverage Our Sales and Marketing Expansion.  Over the past 18 months we have increased the number of employees in our sales and marketing group worldwide and anticipate continuing to expand our sales and marketing group in Europe and, as needed, in other geographic territories. This expansion should provide us access to more hospitals, garner more per-procedure revenues and expand our market share.

Continue to Penetrate Asian Market.  We believe that Asia represents approximately one-third of the global neurointerventional market. In particular, we believe that Japan and China represent a significant potential market for our products and in March 2006 we launched our sales and marketing efforts in Japan through our distribution partner, Goodman. We intend to launch our product line in China in fiscal 2008.

License or Acquire Complementary Products and Technologies.  In addition to growing our business through internal product development efforts, we will continue to look for opportunities to license and/or acquire technologies in order to provide solutions for the treatment of a variety of cerebral vascular conditions. In July 2005, we acquired certain steerable catheter technology from Vascular FX. In January 2006, we entered into a license, development and distribution agreement with Biotronik, a company with stent design and manufacturing expertise, pursuant to which we collaborate with Biotronik to develop certain neurovascular stent products and that provides us with the exclusive worldwide right to market stent products developed jointly by Biotronik and us. In November 2006, we acquired certain neurovascular catheter patent and process technology through the acquisition of VasCon. By continuing to acquire complementary products, we believe we can address a broader range of physician and patient needs.

Enter the Ischemic Stroke Market.  Through our agreement with Biotronik, we recently launched our first product addressing the ischemic stroke market, our Pharos stent. We intend to continue developing additional stent platforms for this market and intend to explore other in-licensing, acquisition and internal research efforts to develop and introduce other ischemic stroke products.

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Products

The following table shows our principal products and indicates significant applications for these products. Most of our products are intended for single use and are either disposed of or, in the case of microcoils, remain in the patient after the procedure. All of our products set forth in the following table have received CE Mark clearance and, except for our Pharos stent, are covered by the U.S. Food and Drug Administration’s (“FDA”) 510(k) process.

Product Line	Sizes	Product Description
	2-18 mm diameter	Three-dimensional framing microcoil; stabilizes the aneurysm. Available in bare platinum and Cerecyte.
MicruSphere® Microcoil
	HeliPaq: 2-20 mm diameter HeliPaq SR: 2-10 mm diameter	Filling microcoil; occludes aneurysm following framing. Available in bare platinum and Cerecyte.
HeliPaq® & HeliPaq SR® Microcoil
	4 and 6 mm diameter	Filling microcoil; occludes aneurysm following framing. Available in bare platinum.
InterPaq® Microcoil
	4-20 mm diameter	Framing and filling coil to deliver more neck and wall coverage in a single deployment. Available in Cerecyte.
Presidiotm Microcoil
	5-12 mm diameter	Three-dimensional framing and filling complex coil for aneurysms which require a softer coil. Available in stretch resistant — bare platinum
Cashmeretm Complex Microcoil
	2-4 mm diameter	Finishing microcoil; soft, stretch resistant, pliable microcoil designed to complete filling of the aneurysm. Available in bare platinum and Cerecyte.
UltiPaq® Microcoil

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Product Line	Sizes	Product Description
	2-18 mm diameter	Available in MicruSphere, HeliPaq SR, UltiPaq and Presidio. Includes filaments comprised of PGA, a bioactive material.
Cerecyte® Microcoil
	.0170” and .0190” inner diameter and 150 cm length	Device used to deliver microcoils into the aneurysm.
CouriertmMicrocatheter
	.014” diameter and 205 cm length	Device used to guide microcatheters and other devices to the aneurysm or stenosis site.
Watusitm Guidewire
	2.5 mm - 4.0 mm outer diameter and 8 mm - 20 mm length	For use as scaffolding of wide-neck aneurysms to ensure that the microcoil is not dislodged and for use in opening intracranial arteries that have narrowed.
Pharostm Stent System
		Electronic control that activates our proprietary microcoil deployment mechanism.
Device Control Box and Connecting Cable

Microcoil Products

We offer a range of microcoils designed to enable neurointerventionalists to treat a wide variety of aneurysms. These include our MicruSphere^®, Helipaq^® and Ultipaq^® microcoil systems which are available in bare platinum and Cerecyte^® versions, and the Presidio^tm line of microcoils which incorporates our proprietary Cerecyte technology. All of our microcoils utilize our rapid deployment system and perform certain specific functions:

•  Frame.  Our MicruSphere and Cashmere microcoils are typically the first microcoils used by the interventionalist to frame the aneurysm. The MicruSphere microcoil folds automatically into a spherical three- dimensional shape that conforms to the shape of the aneurysm. This conforming shape reduces the need for the clinician to manipulate and reposition the coil multiple times, shortens procedure time, and reduces the potential for complications. Additional microcoils may then be placed within the first microcoil in smaller sizes in an approach known as the “Russian doll technique,” sequentially filling the aneurysm.

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•  Frame and Fill.  Our Presidio and Cashmere Microcoils features longer lengths and the unique shapes to frame and fill the aneurysm. This can allow for more platinum to be deployed at the neck of the aneurysm, as well as greater packing density to be achieved with a single coil.

•  Fill.  Our proprietary HeliPaq and HeliPaq SR products are filling microcoils used to fill gaps which may remain in the center of the aneurysm after placement of one or more of our MicruSphere microcoils. Both the HeliPaq and the HeliPaq SR automatically form a helical shape upon deployment, which allows filling of complex gaps in the aneurysm. The HeliPaq SR employs a stretch-resistant system designed to prevent the microcoil from stretching in an unwanted manner while being positioned in the aneurysm. InterPaq microcoils are filling coils used in larger size aneurysms requiring a greater volume of coil mass in order to be adequately filled. The Cashmere microcoil is a soft and conformable stretch resistant complex coil which may also be used as a framing and filling coil,

•  Finish.  Our UltiPaq microcoil is an extra-soft, stretch-resistant finishing coil, used to fill any final gaps in the aneurysm after placement of one or more MicruSphere, Presidio and/or HeliPaq microcoils.

•  Cerecyte.  Our proprietary Cerecyte microcoil product line incorporates filaments comprised of PGA into most of our current line of microcoils — MicruSphere, Presidio, HeliPaq, SR and UltiPaq. Because the PGA filaments run through the center of our microcoils, our Cerecyte microcoils possess the same handling characteristics as our standard platinum microcoils. Initial data from single center studies presented at major scientific meetings suggest that Cerecyte may improve clinical outcomes compared to bare platinum coils. We have initiated two post-market clearance studies in order to collect human clinical data for the purpose of demonstrating accelerated healing by our Cerecyte microcoil product line.

Our Cerecyte Microcoil Trial is a randomized trial which will directly compare Micrus Cerecyte bioactive coils to Micrus bare platinum coils for the treatment of intracranial aneurysms. Up to 23 multinational enrolling centers will enroll 250 patients in each study arm. Our planned Cerecyte Registry is planned to be a non-randomized United States multi-center registry designed to document the clinical and angiographic outcomes of intracranial aneurysms treated with our bioactive Cerecyte microcoils. We have begun to enroll patients in our Cerecyte Registry and plan to enroll a total of 250 patients to assess patient outcomes one year after treatment.

Pharos Balloon-Expandable Stent

Our Pharos stent is a balloon-delivered device which can be used both to treat ischemic disease and for scaffolding of wide-neck aneurysms to ensure that the microcoil is not dislodged. For the treatment of ischemic disease, our Pharos stent dilates intracranial arteries that have narrowed and allows the neurointerventionalist to deliver and deploy a stent in one step. We believe this feature will help reduce overall procedural time and cost. We believe the balloon catheter marker bands combined with the radiopacity of the stent provide for excellent visibility resulting in improved accuracy of deployment. We believe that Pharos’ Rapid Exchange Technology and trackable tip will enable a physician to access tortuous and distal anatomy. In March 2006, we launched the Pharos stent in certain countries outside the United States that recognize the CE Mark and are evaluating regulatory options available in the United States.

Access Products

We recently introduced the following guidewire and microcatheter products:

•  Courier^tm Microcatheter.  Our Courier Microcatheter is a device used to deliver microcoils to the aneurysm. Our Courier microcatheter features our proprietary Endurance^tm technology designed to enhance both tip shaping and tip shape retention, both of which are vital to optimal coil delivery. It will be available in straight and pre-shaped models. Our Courier Microcatheter has been designed to provide the neurointerventionalist with the ability to navigate the tortuous vasculature of the brain. The microcatheter’s design and hydrophilic coating enable a high level of pushability, tip shape retention and overall tracking.

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•  Watusi^tm Guidewire.  Our Watusi Guidewire is used to guide the microcatheter or other delivery system to the aneurysm. Our Watusi Guidewire features excellent visualization as well as our proprietary Response Tip^tm technology, which results in the unique ability to effectively shape and re-shape the guidewire tip.

Microcoil Delivery System and Deployment Mechanism

Our microcoil delivery system is comprised of a device positioning unit (DPU), a connecting cable and a deployment control box. Our DPU is a flexible catheter to which a Micrus microcoil is attached. The DPU allows transport of the microcoil through the vasculature to the brain and final positioning within the aneurysm. The DPU also incorporates a polyethylene fiber at its tip, which attaches to the microcoil. Deployment of the microcoil occurs when the neurointerventionalist activates a resistive heater at the tip of the DPU, shearing the polyethylene fiber that holds the microcoil onto the DPU. Our deployment mechanism results in deployment of the microcoil from the DPU generally within five seconds.

Products Under Development

Our product development efforts are focused on designing products for the interventional neurology field, expanding our line of microcoils, guidewires, microcatheters and stents. Our steerable microcatheter (ENZO) recently received 510(k) clearance from U.S. FDA. We are working to develop next generation microcoils utilizing substances that stimulate cells and/or cell adhesion in order to promote more rapid healing. We are also working to develop next-generation balloon expandable stents for the treatment of intracranial arthrosclerosis. Additionally, we are investigating technologies to treat acute ischemic stroke.

Sales and Marketing

We market our products to interventional neuroradiologists and neurosurgeons who generally practice at centers located in major metropolitan areas. There are currently approximately 300 neurointerventionalists in the United States who perform embolic coiling procedures. We believe less than one-third of these physicians perform a substantial majority of the total number of embolic coiling procedures performed in the U.S. each year.

We have developed relationships with a number of these neurointerventionalists who perform a large number of cerebral vascular procedures. In fiscal 2007, a substantial portion of our product sales were to approximately 78 hospitals in the United States. In order to encourage the continued adoption of our products, we believe that we need to continue to build and maintain relationships with these neurointerventionalists. We believe these relationships are enhanced by the presence of a direct sales organization. Sales of embolic coiling products involve a long-term relationship between the sales representative and interventionalist where the sales representative must initially be present for product demonstrations and to monitor procedures. We recruit our sales representatives based on their experience with minimally invasive devices and prior success in the medical device industry. We provide ongoing sales and product training to our employees and distributors and continually monitor their performance. We also market our products at various industry trade shows and conferences.

In the United States and Canada we market our products through our direct sales force to neurointerventionalists who greatly influence the buying decision of the ultimate purchaser, the hospitals. Currently our direct sales force in the United States and Canada consists of a director of sales, four regional managers, 23 sales representatives and eight clinical specialists.

We have also expanded our sales and marketing effort in Europe, where we rely on both a direct sales force and distribution network. Our European direct sales force consists of two vice president of sales, a director of sales, a director of marketing, one distributor manager, two country managers, nine sales representatives and three clinical specialists.

We have entered into agreements with distributors in Italy, Spain and other European countries, as well as portions of the Middle East and Asia. Our distributors are experienced in the interventional device markets and have relationships with leading neurointerventionalists and institutions in those countries. Our standard distribution agreement generally (i) provides our distributors with an exclusive right to distribute our products in a certain territory; (ii) restricts them from selling products that are competitive with our products for the limited duration of

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our agreement with them; (iii) obligates them to obtain the necessary authorizations, licenses and approvals to import, market and distribute our products within the applicable territory; and (iv) obligates them to promote and distribute our products within the applicable territory.

We believe that Japan represents a significant market for our products. On September 30, 2005, we entered into a five-year, exclusive distribution agreement with Goodman. Under the terms of the distribution agreement, Goodman will promote and market our products in Japan. In February 2006, we received the requisite local regulatory approvals to sell certain of our products in Japan through Goodman, and the sale of such products in Japan commenced in March 2006.

Information on our revenues from sales to unaffiliated customers is included in Note 10 of “Notes to Consolidated Financial Statements.”

We generate revenues from sales to hospitals and third-party distributors. Once a sale has occurred, the customer has no right of return. We provide the customers with limited warranty privileges. We had one customer, Goodman, our distributor in Japan, which accounted for 15% of revenues for the year ended March 31, 2007. No customer accounted for 10% of revenues for the year ended March 31, 2006. We had one customer, Neurologic UK Limited (“Neurologic”), our former distributor in the United Kingdom, which accounted for 14% of revenues for the year ended March 31, 2005.

Research and Development

Our product development efforts are focused on designing products for the interventional neurology field, expanding our line of microcoils, guidewires, microcatheters and stents. We currently are working to develop a steerable microcatheter and next generation microcoils that have surface modifications and/or utilize drugs that may stimulate cells and/or cell adhesion in order to promote more rapid healing.

In addition, we are developing stent technologies for use in the endovascular treatment of aneurysms. Aneurysms with wide necks pose particular challenges to treatment with embolic coils, due to the possibility of the coil dislodging into the blood stream. We are designing a self-expanding stent to produce a scaffold, which covers the opening of wide-neck aneurysms and holds embolic coils in place within the aneurysm, providing the interventionalist the opportunity to treat aneurysms which would previously have required open surgical treatment.

As of March 31, 2007, we had 27 full-time employees engaged in research and development activities. Research and development expenses for the fiscal years ended March 31, 2007, 2006 and 2005 were $7.9 million, $6.6 million and $2.4 million, respectively. We plan on increasing our research and development expenditures in future periods.

Biotronik Collaboration

In January 2006, we entered into a license, development and distribution agreement with Biotronik, pursuant to which we will collaborate with Biotronik to develop certain neurovascular products and we will be the exclusive worldwide distributor for jointly developed neurovascular products. Biotronik granted us an exclusive license to certain patents, know-how and other proprietary technology in the neurovascular field.

Under the terms of our agreement, we paid an upfront licensing fee of approximately $0.6 million to Biotronik and were required to make milestone payments to Biotronik upon receipt of approvals to market stent products we jointly developed for the treatment of neurovascular disease and royalty payments on the products sold. In February 2006, Biotronik received CE Mark clearance for the Pharos stent intended for both the treatment of aneurysms and the treatment of ischemic diseases. As a consequence we paid milestone payments to Biotronik of approximately $0.7 million in both March and April 2006. We have accrued royalty of $34,000 to Biotronik in fiscal 2007. Under the terms of this agreement, there are no future milestone payments to Biotronik related to the Pharos stent. Additionally, we will continue to fund ongoing project development based on the terms of this agreement.

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Physician Advisors

We rely extensively on our physician advisors to advise on our research and development efforts and to provide feedback on the clinical use of our products. Our advisors are experts in interventional neuroradiology and cerebral vascular diseases. We regularly consult with our physician advisors regarding our research and development efforts, preclinical trials and clinical trials.

The physicians who currently serve as our advisors are:

•  L. Nelson Hopkins, M.D., Professor and Chair, Department of Neurosurgery/Professor, Department of Radiology, State University of New York, Buffalo, member of the Micrus Board of Directors.

•  Joseph Horton, M.D., Professor and Chief, Interventional Neuroradiology, Department of Radiology, University of Alabama at Birmingham, Micrus co-founder.

•  Andrew Molyneux, M.D., Frenchay Hospital, North Bristol NHS Trust, United Kingdom, Micrus Medical Director.

Some of our physician advisors have been granted options to purchase shares of our common stock and/or receive a consulting fee. All of our physician advisors are reimbursed for reasonable expenses. In addition our medical advisors receive compensation for clinical studies they conduct for us. All of our medical advisors are employed by other organizations and may have commitments to or have consulting arrangements with other companies, including our competitors, that may limit their availability to consult with us. Although these advisors may contribute significantly to our business, we generally do not expect them to devote more than a small portion of their time to us. We also routinely seek advice, input and feedback on our products and business from a larger broader group of physicians and advisors, some of whom may also receive appropriate compensation for their time and expert opinions.

Manufacturing

We manufacture and/or assemble our proprietary microcoils, guidewires and microcatheters in a clean room and inspect, test and package all components into finished products at our headquarters in San Jose, California. Peripheral catheter products are manufactured at our subsidiary facility, Micrus Design Technology, Inc., in Doral, Florida. As of March 31, 2007, we had 165 employees in manufacturing, quality control, engineering and shipping and receiving.

We have substantial design, manufacturing and applications engineering expertise in the development of small vessel access and delivery systems and intend to continue to leverage this expertise to develop new products. By designing and manufacturing most of the components of our products, we have been able to maintain greater control of quality and manufacturing process changes. Our microcoils are very small in size, ranging from 2 mm to 20 mm in diameter and are manufactured using microfabrication techniques. We have developed proprietary manufacturing technologies and processes in the areas of platinum memory shaping, metal fabrication and microcatheter and stent fabrication.

Trained product personnel assemble and test each of our components and products in a controlled clean room. At various assembly stages each lot of product undergoes thorough testing to ensure compliance with applicable regulations, including ISO9001 standards in the United States and EN46001 certification in Europe. These standards specify the requirements necessary for a quality management system to consistently provide product that meets or exceeds customer requirements and to include processes for continual improvement of the system and that are required in order to obtain a CE Mark to sell medical devices within the European Union. Our quality assurance group verifies that product fabrication and inspection process steps meet our stringent quality specifications and applicable regulatory requirements. Upon successful completion of these steps, the products are sterilized, packaged and prepared for shipment. We typically ship products as orders are received.

We have implemented quality control systems as part of our manufacturing processes, which we believe are in substantial compliance with U.S. Good Manufacturing Practices (GMP) or Quality System Regulations (QSR) requirements. Our San Jose facility also been inspected by the California Department of Health Services on behalf of the State of California and under contract with the FDA, and are registered with the State of California to

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manufacture our products. We believe we are in compliance with FDA GMP for medical devices and have been inspected biennially by the FDA. The most recent of such inspections occurred in April 2006 in San Jose and in October 2006 in Doral. However, we cannot assure you that we will remain in compliance with GMP and our failure to do so could have a material adverse effect on our business, operating results and financial condition.

We purchase the raw materials required for production from various qualified outside vendors. In addition, the deployment control box is manufactured by an outside supplier. We rely on single sources for some of our critical components, including the deployment control box, the platinum used to manufacture the microcoils and certain custom hypodermic tubing material. In addition, we have a sole source subcontract arrangement for sterilization services. We believe we have alternative sources for most of the components purchased from single sources currently and generally maintain adequate supply of products to avoid production interruptions. Where we do not have a qualified second source vendor for a product component and depending on the exact component, we believe it would take us from two days to a month to either manufacture the product component ourselves or have a readily available new supply of the product component. Any unanticipated interruption in the supply of these components and services could have a material adverse effect on us.

Patents and Proprietary Rights

Our success depends in part on our ability to obtain and maintain proprietary protection for our products, technology and know-how, to operate without infringing on the proprietary rights of others and to prevent others from infringing our proprietary rights. Our policy is to seek protection of our proprietary position by filing U.S. and foreign patent applications to protect technology, inventions and improvements that are important to our business. We also rely on trade secrets, know-how and continuing technological innovation to develop and maintain our proprietary position. We hold 58 issued U.S. patents and 66 issued foreign patents expiring between 2014 and 2024. In addition, we have 34 U.S. and 52 foreign patent applications pending covering various aspects of our products and technology.

The issued patents relate, among other things, to subject matter in the following areas:

•  vasoocclusive microcoils and devices and methods for manufacturing such coils and devices;

•  microcoil deployment systems;

•  bioactive microcoils;

•  intracranial vascular stents;

•  catheters for neurovascular intervention;

•  embolic clot retrieval devices; and

•  bioactive material placement systems and methods.

In addition to developing our own technology, we have obtained licenses to certain patents and other intellectual property, including for materials used as coating on our guidewires and for certain type of coils. These licenses grant us the right to use the licensed patents to make, use and sell products that contain the licensed technology. We pay for these licenses through a combination of fixed payments and royalties on sales of covered products. Each of these licenses continues until expiration of the licensed patents. Payments under these license arrangements currently do not account for a material portion of our expenses.

Although we work aggressively to protect our technology, there is no assurance that any patents will be issued from current pending patent applications or from future patent applications. We also cannot assure you that the scope of any patent protection will exclude competitors or provide competitive advantages to us, that any of our patents will be held valid if subsequently challenged, or others will not claim rights in or ownership of our patents and proprietary rights. Furthermore, there can be no assurance that others have not developed or will develop similar products, duplicate any of our products or design around our patents.

The medical device industry has been characterized by extensive litigation regarding patents and other intellectual property rights, and many companies in the industry have employed intellectual property litigation to

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gain a competitive advantage. In September 2004, Boston Scientific Corporation and Target Therapeutics, Inc., a division of Boston Scientific Corporation, (collectively, “Boston Scientific Corporation”) filed a patent infringement suit against us, as described in greater detail in the section below entitled “Legal Proceedings.” We may in the future be subject to further litigation from other companies in our industry. The defense and prosecution of patent suits, U.S. Patent and Trademark Office interference proceedings and related administrative proceedings can be costly and time consuming. An adverse determination in our litigation with Boston Scientific Corporation or in any other litigation or administrative proceedings with any other third party could subject us to significant liabilities or require us to seek licenses. There is no assurance that any such licenses will be available on satisfactory terms, if at all. Adverse determinations in a judicial or administrative proceeding or failure to obtain necessary licenses could prevent us from manufacturing and selling our products, which would have a material adverse effect on our business, operating results and financial condition.

In addition to patents, we rely on trademark, trade secret and other intellectual property laws, nondisclosure agreements and other measures to protect our intellectual property rights. We believe that in order to have a competitive advantage, we must develop and maintain the proprietary aspects of our technologies. We require our employees, consultants and advisors to execute confidentiality agreements in connection with their employment, consulting or advisory relationships with us. We also require our employees, consultants and advisors who we expect to work on our products to agree to disclose and assign to us all inventions conceived while working for us, using our property or which relate to our business. Despite any measures taken to protect our intellectual property, unauthorized parties may attempt to copy aspects of our products or to obtain and use information that we regard as proprietary.

Competition

We compete primarily with Boston Scientific Corporation, Cordis, a division of Johnson & Johnson (“Cordis”), ev3/Micro Therapeutics and Terumo/MicroVention. Boston Scientific, ev3/Micro Therapeutics and Cordis offer broad product lines consisting of embolic microcoils, microcatheters and guidewires, although Cordis has curtailed worldwide shipment of microcoils. Boston Scientific, Cordis and ev3/Micro Therapeutics currently market a variety of microcatheters which are compatible with .001 and .0018 in. size coil systems.

Both Boston Scientific and ev3/Micro Therapeutics sell bioactive microcoils. Boston Scientific markets the Matrix coil which features a platinum core coated with an absorbable suture material intended to cause a tissue reaction. Terumo/MicroVention markets the HydroCoil^® which is an embolic microcoil that swells in the presence of fluid to provide greater volumetric occlusion to an aneurysm. Cordis markets a bare platinum line of microcoils but does not market bioactive or stretch resistant microcoils. Through its acquisition by Terumo, MicroVention now markets microcatheter and wires as well, joining Boston Scientific, Cordis, ev3 and Micrus in this market segment. Boston Scientific and Cordis are currently the only companies which have received U.S. regulatory clearance for the sale of stents for the treatment of hemorrhagic and ischemic stoke.

Boston Scientific, MicroVention, Micro Therapeutics and Cordis are divisions of large publicly traded companies, and enjoy several competitive advantages over us, including: greater financial and personnel resources; significantly greater name recognition; established relationships with neurointerventionalists; established distribution networks; greater resources for product research and development; greater experience in, and resources for, launching, marketing, distributing and selling products; and more broad-based and deeper product lines.

We believe the principal competitive factors in the market for medical devices used in the treatment of cerebral vascular diseases include:

•  improved patient outcomes as a result of physician use of the device;

•  access to and acceptance by leading physicians;

•  depth of product line;

•  product quality and reliability;

•  ease of use for physicians;

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•  sales and marketing capability; and

•  brand recognition and reputation.

Our current or potential competitors may succeed in developing technologies and products that are more effective than those developed by us or that would render our products obsolete or noncompetitive. Additionally, there can be no assurance that we will be able to effectively compete with such competitors in the manufacturing, marketing and sale of our products. At any time, other companies may develop alternative treatments, products or procedures for the treatment of cerebral aneurysms that compete directly or indirectly with our products. If alternative treatments prove to be superior to our products, adoption of our products could be negatively affected and our future revenues could suffer.

Our ability to develop safe, effective and reliable products in a timely manner is the key to our competitive position. Consequently, our success will depend on how quickly we are able to respond to medical and technological changes through the development, clinical evaluation and commercialization of new products. Product development involves a high degree of risk and there can be no assurance that our research and development efforts will result in commercially successful products.

Government Regulation

United States

The research, development, manufacture, labeling, distribution and marketing of our products are subject to extensive regulation by the FDA and other regulatory bodies. Our current products are regulated by the FDA as medical devices and we are required to obtain review and clearance or approval from the FDA prior to commercializing our devices.

FDA’s Premarket Clearance and Approval Requirements

Unless an exemption applies, each medical device we wish to commercially distribute in the United States will require either prior 510(k) clearance or prior premarket approval (PMA) from the FDA. The FDA classifies medical devices into one of three classes. Class I devices are subject to only general controls (e.g. establishment registration and device listing, labeling, medical devices reporting (MDR), and prohibitions against adulteration and misbranding). Class II medical devices require prior 510(k) clearance before they may be commercially marketed. The FDA will clear marketing of a medical device through the 510(k) process if it is demonstrated that the new product has the same intended use, is substantially equivalent to another legally marketed device, including a 510(k)-cleared product, and otherwise meets the FDA’s requirements. Class II devices are also subject to general controls and may be subject to established standards and other special controls. Devices deemed by the FDA to pose a great risk, such as life-sustaining, life-supporting or implantable devices, or devices deemed not substantially equivalent to a legally marketed device are placed in Class III, most of which require premarket approval. Both premarket clearance and premarket approval applications are subject to the payment of user fees, paid at the time of submission for FDA review. The FDA officially reclassified neurovascular embolization devices such as our microcoils products to Class II medical devices effective January 28, 2005. For our microcoil products, catheter products and guidewire product, we have obtained multiple 510(k) clearances.

510(k) Clearance

To obtain 510(k) clearance, we must submit a premarket notification demonstrating that the proposed device is substantially equivalent to a previously cleared 510(k) device or a device that was in commercial distribution before May 28, 1976 for which the FDA has not yet called for the submission of premarket approval applications. The FDA’s 510(k) clearance pathway usually takes from three to twelve months from the date the application is submitted, but it can take significantly longer.

After a device receives 510(k) clearance, any modification that could significantly affect its safety or effectiveness, or that would constitute a significant change in its intended use, will require a new 510(k) clearance or could require premarket approval. The FDA requires each manufacturer to make this determination initially, but the FDA can review any such decision and can disagree with a manufacturer’s determination. If the FDA disagrees

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with a manufacturer’s determination, the FDA can require the manufacturer to cease marketing and/or recall the modified device until 510(k) clearance or premarket approval is obtained. If the FDA requires us to seek 510(k) clearance or premarket approval for any modifications to a previously cleared product, we may be required to cease marketing or recall the modified device until we obtain this clearance or approval. Also, in these circumstances, we may be subject to significant regulatory fines or penalties.

Premarket Approval

A PMA application must be submitted if the device cannot be cleared through the 510(k) process. A PMA application must be supported by extensive data including, but not limited to, technical, preclinical, clinical trials, manufacturing and labeling to demonstrate to the FDA’s satisfaction the safety and effectiveness of the device for its intended use.

After a PMA application is complete, the FDA begins an in-depth review of the submitted information, which generally takes between one and three years, but may take significantly longer. During this review period, the FDA may request additional information or clarification of information already provided. Also during the review period, an advisory panel of experts from outside the FDA may be convened to review and evaluate the application and provide recommendations to the FDA as to the approvability of the device. In addition, the FDA will conduct a preapproval inspection of the manufacturing facility to ensure compliance with quality system regulations. New PMA applications or PMA supplements are required for significant modifications to the manufacturing process, labeling or design of an approved device. PMA supplements often require submission of the same type of information as a PMA application, except that the supplement is limited to information needed to support any changes from the device covered by the original PMA application, and may not require as extensive clinical data or the convening of an advisory panel.

Continuing FDA Regulation

After a device is placed on the market, numerous regulatory requirements apply. These include:

•  quality system regulation (QSR), which requires manufacturers to follow design, testing, control, documentation and other quality assurance procedures during the manufacturing process (otherwise known as Good Manufacturing Practices or GMPs);

•  labeling regulations, which prohibit the promotion of products for unapproved or “off-label” uses and impose other restrictions on labeling; and

•  medical device reporting regulations, which require that manufacturers report to the FDA if their device may have caused or contributed to a death or serious injury or malfunctioned in a way that would likely cause or contribute to a death or serious injury if it were to recur.

Failure to comply with applicable regulatory requirements can result in enforcement action by the FDA, which may include any of the following sanctions:

•  fines, injunctions, and civil penalties;

•  recall or seizure of our products;

•  operating restrictions, partial suspension or total shutdown of production;

•  refusing our request for 510(k) clearance or premarket approval of new products;

•  withdrawing 510(k) clearance or premarket approvals that are already granted; and

•  criminal prosecution.

We are also subject to unannounced inspections by the FDA and the Food and Drug Branch of the California Department of Health Services, and these inspections may include the manufacturing facilities of our subcontractors.

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International

International sales of medical devices are subject to foreign government regulations, which vary substantially from country to country. The time required to obtain approval by a foreign country may be longer or shorter than that required for FDA approval, and the requirements may differ.

The primary regulatory environment in Europe is that of the European Union, which consists of countries encompassing most of the major countries in Europe. The European Union has adopted numerous directives and standards regulating the design, manufacture, clinical trials, labeling, and adverse event reporting for medical devices. Devices that comply with the requirements of a relevant directive will be entitled to bear CE conformity marking, indicating that the device conforms with the essential requirements of the applicable directives and, accordingly, can be commercially distributed throughout Europe. The method of assessing conformity varies depending on the class of the product, but normally involves a combination of self-assessment by the manufacturer and a third-party assessment by a “Notified Body.” This third-party assessment may consist of an audit of the manufacturer’s quality system and specific testing of the manufacturer’s product. An assessment by a Notified Body in one country within the European Union is required in order for a manufacturer to commercially distribute the product throughout the European Union.

In Japan, medical devices must be approved prior to importation and commercial sale by the Ministry of Health, Labor and Welfare (MHLW). Manufacturers of medical devices outside of Japan must utilize a contractually bound Japanese entity to submit an application for device approval to the MHLW. The MHLW evaluates each device for safety and efficacy. As part of its approval process, the MHLW may require that the product be tested in Japanese laboratories. The approval process for products such as our existing microcoil products is typically 12-15 months once an application has been accepted for review. Other medical devices may require a longer review period for approval. Once approved, the manufacturer may import the device into Japan for sale by the manufacturer’s contractually bound importer or distributor.

After a device is approved for importation and commercial sale in Japan, the MHLW continues to monitor sales of approved products for compliance with labeling regulations, which prohibit promotion of devices for unapproved uses and reporting regulations, which require reporting of product malfunctions, including serious injury or death caused by any approved device. Failure to comply with applicable regulatory requirements can result in enforcement action by the MHLW, which may include fines, injunctions, and civil penalties, recall or seizure of our products, operating restrictions, partial suspension or total shutdown of sales in Japan, or criminal prosecution.

In addition to MHLW oversight, the regulation of medical devices in Japan is also governed by the Japanese Pharmaceutical Affairs Law (PAL). PAL was substantially revised in July 2002, and the new provisions were implemented in stages through April 2005. Revised provisions of the approval and licensing system of medical devices in Japan, which constitutes the core of import regulations, came into effect on April 1, 2005. The revised law changes class categorizations of medical devices in relation to risk, introduces a third party certification system, strengthens safety countermeasures for biologically derived products, and reinforces safety countermeasures at the time of resale or rental. The revised law also abolishes the ICC system and replaces it with the “primary distributor” system. Under the revised PAL, manufacturers outside of Japan must now appoint a “primary distributor” located in Japan that holds a primary distributor license for medical devices to provide primary distribution services, including conducting quality assurance and safety control tasks, for each product at the time an application for the approval of each such product is submitted to the MHLW. We are unable at this time to determine the impact of such changes on our approved products, products for which we have already applied for approval in Japan or future products. We do not anticipate that these changes will have a material impact on our existing level of third-party reimbursement for sales of our products in Japan.

Third-Party Reimbursement

We believe that substantially all of the procedures conducted in the U.S. with our products have been reimbursed to date and that substantially all commercial procedures in Europe have been reimbursed. We believe that the procedures performed using our products are generally already reimbursable under government programs and most private plans. Accordingly, we believe providers in the U.S. will generally not be required to obtain new billing authorizations or codes in order to be compensated for performing medically necessary procedures using our

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products on insured patients or patients covered under government programs such as Medicare and Medicaid. We also believe that our procedures will be generally reimbursable under governmental programs and private plans in Japan. In Japan, we are required to obtain regulatory clearance for our products to be eligible for reimbursements by third party payors, even though reimbursement for embolic coiling procedure is already in place.

We cannot assure you that reimbursement polices of third party payors will not change in the future with respect to some or all of the procedures using our products and systems. See “Risk Factors — If neurointerventionalists are unable to obtain sufficient reimbursement for procedures performed with our products, it is unlikely that our products will be widely used” for a discussion of various risks associated with reimbursement from third party payors.

Product Liability and Insurance

We maintain general liability insurance, product liability insurance, directors and officers liability insurance, workers compensation insurance and other insurance coverage that we believe are customary in type and amounts for the business of the type we operate. Medical device companies are subject to an inherent risk of product liability and other liability claims in the event that the use of their products results in personal injury claims. Any such claims could have an adverse impact on us. There can be no assurance that product liability or other claims will not exceed such insurance coverage limits or that such insurance will continue to be available on commercially acceptable terms, if at all.

Employees

As of March 31, 2007, in the United States we had 287 full time employees, including 46 in sales and marketing, 165 in operations and manufacturing, 27 in research and development, 15 quality assurance and regulatory compliance, and 34 in general and administrative functions. As of March 31, 2007, we had 29 employees in Europe, including 18 in sales and marketing and 11 in general and administrative functions. None of our employees are represented by a collective bargaining agreement and we have never experienced a work stoppage. We believe our employee relations are good.

Seasonality

Our worldwide sales do not reflect any significant degree of seasonality; however, in Europe we traditionally experience somewhat lower demand in the second quarter than throughout the rest of the fiscal year as a result of the European summer holiday schedule.

Available Information

We are required to file reports under the Exchange Act with the SEC. You may read and copy our materials on file with the SEC at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549. You may obtain information regarding the SEC’s Public Reference Room by calling the SEC at 1-800-SEC-0330. The SEC also maintains an Internet website at http://www.sec.gov that contains reports, proxy and information statements and other information.

You may also obtain copies of our annual report on Form 10-K, our quarterly reports on Form 10-Q, our current reports on Form 8-K and amendments to these reports as soon as reasonably practicable after such material is electronically filed with or furnished to the SEC free of charge by visiting the investor relations page on our website, www.micruscorp.com. Information contained on our website is not part of this annual report on Form 10-K.

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Item 1A.   Risk Factors.

Certain Factors that May Affect Our Business and Future Results

Some of the information included herein contains forward-looking statements as defined in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements are based on the beliefs of, estimates made by and information currently available to our management and are subject to certain risks, uncertainties and assumptions. Any statements contained herein (including, without limitation, statements to the effect that the Company, we, or management “may,” “will,” “expects,” “anticipates,” “estimates,” “continues,” “plans,” “believes,” or “projects,” or statements concerning “potential” or “opportunity,” and any variations thereof, comparable terminology or the negative thereof) that are not statements of historical fact should be construed as forward-looking statements. Our actual results may vary materially from those expected in these forward-looking statements. The realization of such forward-looking statements may be impaired by risks including, but not limited to the following:

Our future success is dependent on the continued growth in embolic coiling procedures and our ability to convince a concentrated customer base of neurointerventionalists to use our products as an alternative to other available products.

Our future success and revenue growth are significantly dependent upon an increase in the use of embolic coiling as a procedure to treat cerebral aneurysms. If the number of embolic coiling procedures does not increase or if a new procedure that does not employ our products becomes a more acceptable alternative among neurointerventionalists, our business would be seriously harmed.

The number of interventional neuroradiologists and neurosurgeons trained to conduct embolic coiling procedures is relatively small, both in the United States and abroad. There are currently approximately 300 neurointerventionalists in the United States who perform embolic coiling procedures. We believe less than one-third of these physicians perform a substantial majority of the total number of embolic coiling procedures per year. For the year ended March 31, 2007, a substantial portion of our product sales were to approximately 78 hospitals in the United States. The growth in the number of interventional neuroradiologists and neurosurgeons in the United States is constrained by the lengthy training programs required to educate these physicians. Accordingly, our revenue growth will be primarily dependent on our ability to increase sales of our products to our existing customers and to increase sales of products to trained neurointerventionalists that currently use products offered by our competitors. We believe that neurointerventionalists who do not currently use our products will not widely adopt our products unless they determine, based on experience, clinical data and published peer reviewed journal articles, that our products provide benefits or an attractive alternative to the clipping of aneurysms or the use of competitors’ products. We believe neurointerventionalists base their decision to use an alternative procedure or product on the following criteria, among others:

•  extent of clinical evidence supporting patient benefits;

•  their level of experience with the alternative product;

•  perceived liability risks generally associated with the use of new products and procedures;

•  availability of reimbursement within healthcare payment systems; and

•  costs associated with the purchase of new products and equipment.

In addition, we believe that recommendations and support of our products by influential physicians are essential for market acceptance and adoption. If we do not receive continued support from such influential physicians, neurointerventionalists and hospitals may not use our products. In such circumstances, we may not achieve expected revenue levels and our business will suffer.

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We are currently involved in a patent litigation action involving Boston Scientific Corporation and, if we do not prevail in this action, we could be liable for past damages and be prevented from making, using, selling, offering to sell, importing into the U.S. or exporting from the U.S., our microcoils, our primary product line.

In September 2004, Boston Scientific Corporation and Target Therapeutics, Inc., a subsidiary of Boston Scientific Corporation, (collectively “Boston Scientific”), filed a patent infringement suit in the United States District Court for the Northern District of California, alleging that our embolic coil products infringe two patents held by Boston Scientific and that this infringement is willful. Sales of our embolic coil products currently represent virtually all of our revenues. Boston Scientific is a large, publicly-traded corporation with significantly greater financial resources than us. In November 2004, we answered Boston Scientific’s complaint and counterclaimed, alleging that Boston Scientific’s embolic coil products, and their use, infringe three of our patents. In November 2006, we withdrew one of our three asserted patents from the litigation to pursue a reissue application filed with the United States Trademark and Patent Office (“USPTO”). Each party seeks an injunction preventing the making, using, selling, offering to sell, importing into the U.S. or exporting from the U.S., of the other’s embolic coil products in the United States, damages for past infringement, which may be trebled, and payment of its legal fees and costs. In addition, each party seeks a declaration that the patents of the other are invalid and not infringed and has alleged that certain of the asserted patents of the other are unenforceable due to inequitable conduct.

Boston Scientific is also a party in two other lawsuits against Cordis and ev3/Micro Therapeutics, Inc. in which the Boston Scientific patents, which are the basis of Boston Scientific’s suit against us, are also at issue. An outcome of either of these lawsuits adverse to Cordis or ev3/Micro Therapeutics, Inc., and related to the same patent claims Boston Scientific asserts against us, could have an adverse impact on certain of our defenses in our litigation with Boston Scientific.

In October 2004, Cordis requested ex parte reexamination of certain claims in those patents. In February 2005, the court granted a stay of the Boston Scientific lawsuit against Micrus until the earlier of 12 months or the outcome of the reexamination by the USPTO in the Cordis case. In February 2006, the USPTO issued a Notice of Intent to Issue Ex Parte Reexamination Certificate for one of the two patents, apparently confirming all of the claims of that patent. In February 2006, the USPTO also issued an Office Action in which it apparently confirmed the patentability of certain of the claims in the second patent, but rejected the remainder. Boston Scientific has stated to the USPTO and to the court that the rejected claims from the second patent can be reissued and certified as patentable upon reexamination if a correction is made to the priority chain for the second patent.

In March 2006, the court lifted the stay with respect to any claims that were confirmed as patentable in the reexamination proceedings and has permitted discovery in the case to commence with respect to those claims. Micrus subsequently negotiated with Boston Scientific, and the Court confirmed, a schedule that would permit discovery and claim construction proceedings to proceed for the second patent while it is still undergoing reexamination and reissue proceedings. Since the stay was lifted, Micrus and Boston Scientific have exchanged preliminary infringement and invalidity contentions, expert reports, claim construction briefs, and have deposed each other’s expert witnesses concerning each of the four patents-in-suit. Discovery is ongoing in the case. A hearing on claim construction was held on June 1, 2007. The Court has not calendared any other dates.

We are unable at this time to determine the likely outcome of the patent litigation. Patent lawsuits involve complex legal and factual issues which can take a number of years and a great deal of expense and management attention to resolve. We may also be subject to negative publicity due to the litigation. In the event it is determined that we infringe patent claims asserted by Boston Scientific and that those claims are not invalid and not unenforceable we may, among other things, be required to do one or more of the following:

•  pay damages, including up to treble damages and Boston Scientific’s attorney’s fees and costs, which may be substantial;

•  cease, because of an injunction, the making, using, selling, offering to sell, importing into the U.S. or exporting from the U.S. of our embolic coil products, which currently represent virtually all of our revenues, found to infringe the patent claims asserted by Boston Scientific;

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•  expend significant resources to redesign our technology so that it does not infringe the patent claims asserted by Boston Scientific, which may not be possible;

•  discontinue manufacturing or other processes that incorporate technology that infringes the patent claims asserted by Boston Scientific;

•  become subject to a compulsory license order under which we would be required to pay Boston Scientific a royalty on future sales of our products; and/or

•  obtain a license from Boston Scientific to use the relevant patents, which may not be available to us on acceptable terms, or at all.

If our embolic coil products were found to infringe, any development or acquisition of products or technologies that do not infringe the patent claims asserted by Boston Scientific could require the expenditure of substantial time and other resources and could have a material adverse effect on our business and financial results. If we were required to but could not obtain a license under the patent claims asserted by Boston Scientific, we would likely be prevented from commercializing or further commercializing the relevant products. We believe that it is unlikely that we would be able to obtain a license under the patent claims being asserted by Boston Scientific. If we need to redesign our products to avoid the patent claims being asserted by Boston Scientific, we may suffer significant regulatory delays associated with conducting additional studies or submitting technical, manufacturing or other information related to the redesigned product and, ultimately, in obtaining approval.

As a result of Boston Scientific’s answer to our counterclaim that Boston Scientific infringes our two remaining patents-in-suit, the validity of those patents is now at issue in the lawsuit. The court could find that those patents are invalid, which would prevent us from asserting those patents against third parties.

An unfavorable outcome for us in this patent litigation would significantly harm our business and may cause us to materially change our business model.

We have a limited operating history, have incurred significant operating losses since inception, and expect to continue to incur losses, and we cannot assure you that we will achieve profitability.

We were incorporated in the State of Delaware in 1996, and began commercial sales of our microcoil products in 2000. We have yet to demonstrate that we can generate sufficient sales of our products to become profitable. The extent of our future operating losses and the timing of profitability are uncertain, and we may never achieve profitability. We have incurred significant net losses since our inception, including losses of approximately $5.5 million, $8.3 million and $6.7 million for the fiscal year ended March 31, 2007, 2006 and 2005, respectively. At March 31, 2007, we had an accumulated deficit of $55.1 million. It is possible that we will never generate sufficient revenues from product sales to achieve profitability. Even if we do achieve significant revenues from our product sales, we expect our operating expenses to increase as we, among other things:

•  grow our internal and third-party sales and marketing forces to expand the sales of our products in the United States and internationally;

•  increase our research and development efforts to improve upon our existing products and develop new products;

•  perform clinical research and trials on our existing products and product candidates;

•  expand our regulatory resources in order to obtain governmental approvals for our existing product enhancements and new products;

•  acquire and/or license new technologies; and

•  expand manufacturing.

As a result of these activities, we may never become profitable. Even if we do achieve profitability, we may not be able to sustain or increase profitability on an ongoing basis.

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Our quarterly operating and financial results and our gross margins are likely to fluctuate significantly in future periods.

Our quarterly operating and financial results are difficult to predict and may fluctuate significantly from period to period. The level of our revenues, gross margins and results of operations at any given time will be based primarily on the following factors:

•  neurointerventionalist and patient acceptance of our products;

•  changes in the number of embolic coiling procedures performed to treat cerebral aneurysms;

•  the seasonality of our product sales;

•  the mix of our products sold;

•  stocking patterns for distributors;

•  the development of new procedures to treat cerebral aneurysms;

•  results of clinical research and trials on our existing products and products in development;

•  demand for, and pricing of, our products;

•  levels of third-party reimbursement for our products;

•  timing of new product offerings, acquisitions, licenses or other significant events involving us or our competitors;

•  increases in the costs of manufacturing and selling our products;

•  the amount and timing of our operating expenses;

•  litigation expenses;

•  fluctuations in foreign currency exchange rates;

•  regulatory approvals and legislative changes affecting the products we may offer or those of our competitors;

•  the effect of competing technological and market developments;

•  changes in our ability to obtain and maintain FDA approval or clearance for our products;

•  inventory adjustments we may have to make in any quarter;

•  interruption in the manufacturing or distribution of our products;

•  our ability to maintain and expand our sales force and operational personnel;

•  the ability of our suppliers to timely provide us with an adequate supply of materials and components; and

•  amount and timing of capital expenditures and other costs relating to any potential expansion of our operations.

Many of the products we may seek to develop and introduce in the future will require FDA approval or clearance and meet similar regulatory requirements in other countries where we seek to market our products, without which we cannot begin to commercialize them. Forecasting the timing of sales of our products is difficult due to the delay inherent in seeking FDA and other clearance or approval, or the failure to obtain such clearance or approval. In addition, we will be increasing our operating expenses as we build our commercial capabilities. Accordingly, we may experience significant, unanticipated quarterly losses. Because of these factors, our operating results in one or more future quarters may fail to meet the expectations of securities analysts or investors, which could cause our stock price to decline significantly.

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We may not be able to develop new products or product enhancements that will be accepted by the market.

Our success will depend in part on our ability to develop and introduce new products and enhancements to our existing products. We cannot assure you that we will be able to successfully develop or market new products or that any of our future products will be accepted by the neurointerventionalists who use our products or the payors who reimburse for many of the procedures performed with our products. The success of any new product offering or enhancement to an existing product will depend on several factors, including our ability to:

•  properly identify and anticipate interventionalist and patient needs;

•  develop new products or enhancements in a timely manner;

•  obtain the necessary regulatory approvals for new products or product enhancements;

•  provide adequate training to potential users of our products;

•  receive adequate reimbursement for our procedures; and

•  develop an effective marketing and distribution network.

If we do not develop new products or product enhancements in time to meet market demand or if there is insufficient demand for our products or enhancements, we may not achieve expected revenue levels and our business will suffer.

Our international operations and our relationships with physicians and other consultants require us to comply with a number of U.S. and international regulations.

We are required to comply with a number of international regulations related to sales of medical devices and contractual relationships with physicians in countries outside of the United States. In addition, we must comply with the Foreign Corrupt Practices Act (“FCPA”) which prohibits U.S. companies or their agents and employees from providing anything of value to a foreign official for the purposes of influencing him or her to help obtain or retain business, direct business to any person or corporate entity, or obtain any unfair advantage.

In August 2004 while reviewing our sales and payment procedures, we identified certain payments we made to physicians outside the United States that may have violated the FCPA and the laws of certain foreign countries. Following an internal investigation, we voluntarily disclosed to the United States Department of Justice (“DOJ”) the factual information obtained in our internal investigation of potential violations of the FCPA.

After reviewing the results of the internal investigation and the compliance procedures implemented by us, the DOJ entered into an agreement (the “DOJ Agreement”) with us in February 2005. Pursuant to that agreement, the DOJ will not prosecute us for the conduct disclosed to the DOJ, and we agreed to various conditions, including establishing policies and procedures to assure compliance with the FCPA and other relevant anti-bribery laws, retaining an independent law firm to act as a monitor for purposes of reporting to the DOJ for a period of three years as to our compliance with the DOJ Agreement and to monitor our implementation of and adherence to FCPA compliance policies and procedures, and fully cooperating with the DOJ, the independent monitor, and the SEC. We must remain in complete compliance with these conditions for a period of two years, or face the filing of a criminal complaint against us. The terms of the DOJ Agreement will bind our successors, or any merger partners, as long as the DOJ Agreement is in effect.

The payments we made to physicians in France, Germany, Spain and Turkey are also likely to have violated the applicable laws in those foreign jurisdictions and may possibly have violated laws in Switzerland, where our Swiss subsidiary is located. We are not able to determine at this time what penalties or other sanctions, if any, authorities in France, Germany, Spain or Turkey may impose on us as a result of such violations. Such amounts could be material to our financial position, results of operations or cash flows. We have been notified by the Swiss Federal Prosecutor that it does not intend to bring any action or impose any penalties on us relating to our activities in Switzerland.

Though we have adopted a number of compliance procedures, including adoption of a Foreign Corrupt Practices Act Policy and related procedures, and appointed a Compliance Officer, we cannot assure you that we will

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be able to comply with the various regulations in foreign jurisdictions, which vary from country to country. Implementing and monitoring such compliance procedures in a number of foreign jurisdictions can be very expensive and time-consuming. Any failure by us to adopt appropriate compliance procedures and ensure that our employees and agents comply with applicable laws and regulations in foreign jurisdictions could result in substantial penalties and/or restrictions in our ability to sell products in certain foreign jurisdictions.

We are in a highly competitive market segment, face competition from large, well-established medical device manufacturers with significant resources, and may not be able to increase penetration in our markets or otherwise compete effectively.

The market for medical devices for treatment of cerebral vascular diseases is intensely competitive, subject to rapid change and significantly affected by new product introductions and other market activities of industry participants. We compete primarily with the Target Therapeutics division of Boston Scientific Corporation, the market leader, as well as Cordis, ev3/Micro Therapeutics and Terumo/MicroVention. At any time, other companies may develop alternative treatments, products or procedures for the treatment of cerebral aneurysms that compete directly or indirectly with our products. If alternative treatments prove to be superior to our microcoil or other products, continued use or adoption of our products could be negatively affected and our future revenues could suffer.

In addition, most of our current and potential competitors are either large publicly traded or divisions or subsidiaries of large publicly traded companies, and enjoy several competitive advantages over us, including:

•  greater financial and personnel resources;

•  significantly greater name recognition;

•  established relationships with neurointerventionalists;

•  established distribution networks;

•  greater experience in obtaining and maintaining FDA, and other regulatory approvals for products and product enhancements, and greater experience in developing compliance programs for compliance with numerous federal, state, local and similar laws in non-U.S. jurisdictions;

•  greater resources for product research and development;

•  greater experience in, and resources for, launching, marketing, distributing and selling products; and

•  broader product lines.

Except for our distribution agreement with Goodman, none of our customers has long-term purchase agreements with us and may at any time switch to the use of our competitors’ products.

For these reasons, we may not be able to compete successfully against our current or potential future competitors and sales of our products and our revenues may decline.

Our sales in international markets subject us to foreign currency exchange and other risks and costs that could harm our business.

A substantial portion of our revenues are derived from outside the U.S. For the fiscal years ended March 31, 2007, 2006 and 2005, revenues from customers outside the U.S. represented approximately 51%, 53% and 48%, respectively, of our revenues. We anticipate that revenues from international customers will continue to represent a substantial portion of our revenues as we continue to expand in new international markets including China and Japan. Because we generate revenues in foreign currencies, we are subject to the effects of exchange rate fluctuations. For the fiscal year ended March 31, 2007, approximately 31% of our revenues were denominated in currencies other than the U.S. dollar. The functional currency of our Swiss subsidiary is the Swiss franc. In Europe, our revenues are denominated in Swiss francs, euros, pounds sterling and U.S. dollars. Accordingly, we are exposed to market risk related to changes between the Swiss franc and these other currencies in which we conduct business. If the Swiss franc appreciates against the currencies in which our receivables are denominated, we will

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recognize foreign currency losses. For the preparation of our consolidated financial statements, the financial results of our Swiss and UK subsidiaries are translated into U.S. dollars based on average exchange rates during the applicable period. If the U.S. dollar appreciates against the Swiss franc and pound sterling, the revenues we recognize from sales by our European subsidiaries will be adversely impacted. Historically, we have also been exposed to risks from fluctuations in currency exchange rates due to intercompany loans made to Micrus SA, our Swiss subsidiary, in 2001 in connection with its incorporation. These loans are denominated in Swiss francs and will fluctuate in value against the U.S. dollar, causing us to recognize foreign exchange gains and losses. Foreign exchange gains or losses as a result of exchange rate fluctuations in any given period could harm our operating results and negatively impact our revenues. Additionally, if the effective price of our products were to increase as a result of fluctuations in foreign currency exchange rates, demand for our products could decline and adversely affect our results of operations and financial condition. We currently do not enter into foreign currency forward contracts and other arrangements intended to hedge our exposure to adverse fluctuations in exchange rates.

We are subject to various additional risks as a consequence of doing business internationally, and, in particular in Argentina, Brazil, Chile, Columbia, Costa Rica, Mexico, Peru, Venezuela, Greece and Turkey, each of which could harm our business, including the following:

•  local economic and political instability or other potentially adverse conditions;

•  lack of experience in certain geographical markets;

•  unexpected delays or changes in regulatory requirements;

•  increased difficulty in collecting accounts receivables in certain foreign countries;

•  delays and expenses associated with tariffs and other trade barriers;

•  difficulties and costs associated with attracting and maintaining third party distributors;

•  compliance with foreign laws and regulations; and

•  adverse tax consequences or overlapping tax structures.

If we fail to increase our direct sales force in a timely manner, our business could suffer.

We have a limited domestic and international direct sales force. We also have a distribution network for sales in the major markets in Europe, Latin America, Asia and the Middle East. As we launch new products and increase our marketing efforts with respect to existing products, we will need to expand the number of our direct sales personnel on a worldwide basis. The establishment and development of a more extensive sales force will be expensive and time consuming. There is significant competition for sales personnel experienced in interventional medical device sales. If we are unable to attract, motivate and retain qualified sales personnel and thereby increase our sales force, we may not be able to increase our revenues.

If we fail to properly manage our anticipated growth, our business could suffer.

We have experienced, and may continue to experience, periods of rapid growth and expansion, which have placed, and will likely continue to place, a significant strain on our limited personnel and other resources. In particular, the expansion of our fabrication facility and the continuing expansion of our direct sales force will require significant management, technical and administrative resources. Any failure by us to manage our growth effectively, could have an adverse effect on our ability to achieve our development and commercialization goals.

To achieve our revenue goals, we must successfully increase production in our fabrication facility as required by customer demand. We may in the future experience difficulties in increasing production, including problems with production yields and quality control and assurance and in satisfying and maintaining compliance with regulatory requirements. These problems could result in delays in product availability and increases in expenses. Any such delay or increased expense could adversely affect our ability to generate revenues.

Future growth will also impose significant added responsibilities on management, including the need to identify, recruit, train and integrate additional employees. In addition, rapid and significant growth will place a

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strain on our administrative and operational infrastructure. In order to manage our operations and growth we will need to continue to improve our operational, financial and management controls, reporting systems and procedures. If we are unable to manage our growth effectively, it may be difficult for us to execute our business strategy and our operating results and business could suffer.

We are required to evaluate our internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act of 2002 and are exposed to future risks of non compliance.

Section 404 of the Sarbanes-Oxley Act of 2002 (the “Act”) requires us to include an internal controls report from management in our Annual Report on Form 10-K. The internal control report must include a statement:

•  about management’s responsibility for establishing and maintaining adequate internal controls over financial reporting;

•  identifying the framework used by management to conduct the required evaluation of the effectiveness of our internal control over financial reporting;

•  concerning management’s assessment of the effectiveness of our internal control over financial reporting as of the period covered by the Annual Report, including a statement as to whether or not internal control over financial reporting is effective; and

•  that our independent registered public accounting firm has issued an attestation report on management’s assessment and the effectiveness of internal control over financial reporting.

We completed our assessment of our internal control over financial reporting as required by Section 404 for the fiscal year ended March 31, 2007. Our assessment, testing and evaluation resulted in our conclusion that as of March 31, 2007, our internal control over financial reporting was effective. Our independent registered accounting firm has also expressed the opinion that our internal controls over financial reporting were effective during that period. However, our controls, may not prove to be adequate for the future periods and we cannot predict the outcome of our testing in future periods. If our internal controls are deemed to be ineffective in future periods, our financial results or the market price of our stock could be adversely affected. In any event, we will incur additional expenses and commitment of management’s time in connection with further evaluations, which may adversely affect our future operating results and financial condition.

Our future capital needs are uncertain and we may need to raise additional funds in the future, and such funds may not be available on acceptable terms or at all.

We believe that our current cash position, together with the cash to be generated from expected product sales will be sufficient to meet our projected operating requirements for at least the next 12 months. However, after such period we may be required to seek additional funds from public and private stock offerings, borrowings under lease lines or other sources. Our capital requirements will depend on many factors, including:

•  the revenues generated by sales of our products;

•  the costs associated with expanding our sales and marketing efforts;

•  the expenses we incur in manufacturing and selling our products;

•  the costs of developing and or acquiring new products or technologies;

•  the cost of obtaining and maintaining FDA approval or clearance of our products and products in development;

•  costs associated with our litigation with Boston Scientific;

•  the expenses we incur related to compliance with the U.S. FCPA and laws and regulations in non-U.S. jurisdictions;

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•  costs associated with compliance with the Sarbanes-Oxley Act of 2002 and rules and regulations affecting public companies recently promulgated by the Securities and Exchange Commission and The NASDAQ Stock Market;

•  the costs associated with our facilities expansion, if any; and

•  the costs associated with increased capital expenditures.

As a result of these factors, we may need to raise additional funds, and such funds may not be available on favorable terms, or at all. Furthermore, if we issue equity or debt securities to raise additional funds, our existing stockholders may experience dilution, and the new equity or debt securities may have rights, preferences and privileges senior to those of our existing stockholders. In addition, if we raise additional funds through collaboration, licensing or other similar arrangements, it may be necessary to relinquish valuable rights to our potential products or proprietary technologies, or grant licenses on terms that are not favorable to us. If we cannot raise funds on acceptable terms, we may not be able to develop or enhance our products, execute our business plan, take advantage of future opportunities, or respond to competitive pressures or unanticipated customer requirements. In these events, our ability to achieve our development and commercialization goals would be adversely affected.

If we choose to acquire new and complementary businesses, products or technologies instead of developing them ourselves, we may be unable to complete these acquisitions or to successfully integrate them in a cost effective and non-disruptive manner.

Our success depends on our ability to continually enhance and broaden our product offerings in response to changing customer demands, competitive pressures and technologies. We may in the future pursue the acquisition of additional complementary businesses, products or technologies instead of developing them ourselves. We do not know if we will be able to successfully complete any such acquisitions, or whether we will be able to successfully integrate any acquired business, product or technology or retain any key employees. Integrating any business, product or technology we acquire could be expensive and time consuming, disrupt our ongoing business and distract our management. If we are unable to integrate any acquired businesses, products or technologies effectively, our business will suffer. In addition, any amortization or charges resulting from the costs of acquisitions could harm our business and operating results.

We are dependent on single source suppliers for components and materials used in our devices, and the loss of any of these suppliers, or their inability to supply us with an adequate supply of materials, could harm our business.

We rely on third-party suppliers for components and materials used in our products and rely on single sources for many of the microcoil and delivery system components, including tubing, connectors and sterilization services. Our dependence on third-party suppliers involves several risks, including limited control over pricing, availability, quality, delivery schedules and supplier compliance with regulatory requirements. Any delays in delivery of such components or provision of such services or shortages of such components could cause delays in the shipment of our products, which could significantly harm our business. We generally acquire our single source components pursuant to purchase orders placed in the ordinary course of business, and we have no guaranteed supply arrangements with any of our single source suppliers. Because of our reliance on these vendors, we may also be subject to increases in component costs. These increases could significantly harm our business. For us to be successful, our third-party suppliers must also be able to provide us with the materials and components of our products in substantial quantities, in compliance with regulatory requirements, in accordance with agreed upon specifications, at acceptable cost and on a timely basis. Our anticipated growth may strain the ability of suppliers to deliver an increasingly large supply of materials and components. If we are unable to obtain sufficient quantities of high quality components and materials to meet customer demand on a timely basis, we could lose customers, our reputation may be harmed and our business could suffer. If any one or more of our third-party suppliers cease to provide us with sufficient quantities of our materials or components in a timely manner or on terms acceptable to us, we would have to seek alternative sources of supply. We could incur delays while we locate and engage alternative qualified suppliers and we might be unable to engage alternative suppliers on favorable terms. Any such disruption or increased expenses could harm our commercialization efforts and adversely affect our ability to generate revenues.

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We rely on independent contract manufacturers for the manufacture and assembly of certain of our products and components. Reliance on independent contract manufacturers involves several risks, including the potential inadequacy of capacity, the unavailability of or interruptions in access to certain process technologies and reduced control over product quality, compliance with regulatory requirements, delivery schedules, manufacturing yields and costs. Such manufacturers have possession of and at times title to molds for certain manufactured components of our products. Shortages of raw materials, production capacity constraints or delays by our contract manufacturers could negatively affect our ability to meet our production obligations and result in increased prices for affected parts. Any such reduction, constraint or delay may result in delays in shipments of our products or increases in the prices of components, either of which could have a material adverse effect on our business, operating results and financial condition. We have no supply agreements with our current contract manufacturers and utilize purchase orders which are subject to supplier acceptance. The unanticipated loss of any of our contract manufacturers could cause delays in our ability to deliver product while we identify and qualify a replacement manufacturer. If our current or future independent contract manufacturers are unable to meet our requirements for manufactured components, our business could suffer.

Our operations are currently conducted at several locations that may be at risk from earthquakes or other natural disasters.

We currently conduct our manufacturing, development and management activities at two locations in Silicon Valley, California, near known earthquake fault zones and in Doral, Florida, where there is a risk of hurricanes. We have taken precautions to safeguard our facilities, including insurance, health and safety protocols, and off-site storage of computer data. However, any future natural disaster, such as an earthquake or hurricane, could cause substantial delays in our operations, damage or destroy our equipment or inventory, and cause us to incur additional expenses. A disaster could seriously harm our business and results of operations.

If we are unable to effectively manage our inventory held on consignment by our intended customers, we will not achieve our expected results.

A significant portion of our inventory is held on consignment by hospitals that purchase the inventory as they use it. In these consignment locations, we do not have physical possession of the consigned inventory. We therefore have to rely on information from our customers as well as periodic inspections by our sales personnel to determine when our products have been used. We have in the past experienced problems managing appropriate consigned inventory levels and as a result we recorded an impairment of inventory for anticipated obsolescence in fiscal 2004 and an impairment of excess inventory in both fiscal 2004 and 2005. If we are not able to effectively manage appropriate consigned inventory levels, we may suffer inventory losses that will reduce our gross profit levels. There can be no assurance that any efforts to strengthen our monitoring and management of consigned inventory will be adequate to meaningfully reduce the risk of inventory loss.

We are dependent on our senior management team, key clinical advisors and scientific personnel, and the loss of any of them could harm our business.

Our continued success depends in part upon the continued availability and contributions of our senior management team and the continued participation of our key clinical advisors. We have entered into agreements with certain members of our senior management team, but none of these agreements guaranty the services of the individual for a specified period of time. We also rely on the skills and talents of our scientific personnel because of the complexity of our products. The loss of members of our senior management, key clinical advisors or scientific personnel, or our inability to attract or retain other qualified personnel or advisors could have a material adverse effect on our results of operations and financial condition.

The medical device industry is characterized by patent litigation, which could be costly, result in the diversion of management’s time and efforts and require us to pay damages.

The medical device industry is characterized by extensive litigation and administrative proceedings over patent and other intellectual property rights. Accordingly, we may in the future be subject to further litigation and administrative proceedings over such rights with other companies in our industry. As we have discussed above with

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respect to our current litigation with Boston Scientific, whether a product or method infringes a patent involves complex legal and factual issues rendering the outcome of any patent dispute largely unpredictable. In the future, other competitors may assert that at least one of our products, its components, or the methods we employ in the use or manufacture of our products are covered by and infringe the competitors’ U.S. or foreign patents held by them. In addition, should our patents or applications have claims that encompass the same scope as claims pending or issued to a third party competitor, that third party may claim that its claims have priority over ours because they invented the claimed subject matter first. Because patent applications generally take many years to issue, there may be third party applications presently pending of which we are unaware, that may in the future result in issued patents that at least one of our products, its components, or the methods we employ in the use or manufacture of our product(s) may infringe. There could also be issued patents that one or more components of our products may inadvertently be infringing, of which we are unaware. As the number of participants in the market for cerebral vascular treatments and the number of issued patents in this technology area grows, the possibility of being charged with patent infringement increases.

As we have discussed above with respect to our litigation with Boston Scientific, any infringement claims against us may cause us to incur substantial costs, could place a significant strain on our financial resources, divert the attention of management from our core business and harm our reputation. If the relevant patent claims are upheld as valid and enforceable and we are found to infringe, we could be required to pay substantial damages and/or royalties and could be prevented from selling our products unless we could obtain a license or were able to redesign our products to avoid infringement. Any such license may not be available on reasonable terms, if at all. If we fail to obtain any required licenses or make any necessary changes to our products or technologies, we may be unable to commercialize one or more of our products or practice the methods we employ in the use or manufacture of our products.

Our ability to protect our intellectual property and proprietary technology through patents and other means is uncertain.

Our success depends significantly on our ability to procure proprietary rights to the technologies used in our products. We rely on patent protection, as well as a combination of copyright, trade secret and trademark laws, and nondisclosure, confidentiality and other contractual restrictions to protect our proprietary technology. However, these legal means afford only limited protection and may not be sufficient to adequately protect our intellectual property or permit us to gain or keep any competitive advantage. For example, any of our pending U.S. or foreign patent applications may ultimately not issue as a patent or, alternatively, may issue with claims that are of little or no value to us. In addition, once issued, a valuable patent may be challenged successfully by third parties and invalidated, such as is being attempted by Boston Scientific in our presently ongoing litigation. In addition, our patent protection for material aspects of our products and methods is presently being pursued with applications that have been filed but not issued, such that these material aspects are not presently protected by patents. Competitors may further be able to get around having to license our technology in order to avoid infringement by designing around our issued and published patent claims, thereby staying clear of our proprietary rights. Similarly, competitors may develop products and methods that are equivalent or superior to ours. Our confidentiality agreements and intellectual property assignment agreements with our employees, consultants and advisors may not be enforceable or may not provide meaningful protection for our trade secrets or other proprietary information in the event of unauthorized use or disclosure or other breaches of the agreements. Furthermore, the laws of some foreign countries may not protect our intellectual property rights to the same extent as do the laws of the United States. Both the process of procuring patent rights and the process of managing patent disputes can be time consuming and expensive.

In the event a competitor infringes upon our patent or other intellectual property rights, enforcing those rights may be difficult and time consuming. Even if successful, litigation to enforce our intellectual property rights or to defend our patents against challenge could be prolonged, costly and could divert our management’s attention. We may not have sufficient resources to enforce our intellectual property rights or to defend our patents against a challenge.

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If we fail to obtain, or experience significant delays in obtaining, FDA clearances or approvals for our future products or product enhancements, or to comply with similar regulatory requirements in other countries where we market our products, our ability to commercially distribute and market our products could suffer.

Our medical devices are subject to rigorous regulation by the FDA and numerous other federal, state and foreign governmental authorities. Our failure to comply with such regulations could lead to the imposition of injunctions, suspensions or loss of regulatory clearances or approvals, product recalls, termination of distribution or product seizures or the need to invest substantial resources to comply with various existing or new requirements. In the more egregious cases, criminal sanctions, civil penalties, disgorgement of profits or closure of our manufacturing facilities are possible. The process of obtaining regulatory clearances or approvals to market a medical device, particularly from the FDA, can be costly and time consuming, and there can be no assurance that such clearances or approvals will be granted on a timely basis, if at all. In particular, the FDA permits commercial distribution of most new medical devices only after the device has received 510(k) clearance or is the subject of an approved pre-market approval application, or PMA. The FDA will clear marketing of a medical device through the 510(k) process if it is demonstrated that the new product has the same intended use, is substantially equivalent to another legally marketed device, including a 510(k)-cleared product, and otherwise meets the FDA’s requirements. The PMA approval process is more costly, lengthy and uncertain than the 510(k) clearance process and requires the development and submission of clinical studies supporting the safety and effectiveness of the device. Product modifications may also require the submission of a new 510(k) clearance, or the approval of a PMA before the modified product can be marketed. Changes in labeling and manufacturing site for a PMA approved device may require the submission and approval of a PMA supplement. Any products we develop that require regulatory clearance or approval may be delayed, if approved at all. In addition, we believe that some of our new products will require an approved PMA before we can commercially distribute the device and we cannot assure you that any new products or any product enhancements we develop will be subject to the shorter 510(k) clearance process instead of the more lengthy PMA requirements. Additionally, certain of our products under development may involve both device and drug or biologic regulation and we will need to comply with drug and biologic regulations in addition to medical device requirements. Accordingly, we anticipate that the regulatory review and approval process for some of our future products or product enhancements may take significantly longer than anticipated or that we have experienced in the past. We will also be required to pay a medical device user fee and may also be required to pay a drug or biologic user fee. There is no assurance that the FDA will not require that a certain new product or product enhancement go through the lengthy and expensive PMA approval process. We have no experience in obtaining PMA approval. We also have no experience in obtaining drug or biologic approval, and will need to rely on third party assistance in navigating the regulatory approval pathway for future combination products.

Further, pursuant to FDA regulations, we can only market our products for cleared or approved uses. Certain of our products may be used by physicians for indications other than those cleared or approved by the FDA, but we cannot promote the products for such off-label uses.

Modifications to our marketed products may require new 510(k) clearances or pre-market approvals, or may require us to cease marketing or recall the modified products until clearances are obtained.

Any modification to a 510(k)-cleared device that could significantly affect its safety or effectiveness, or that would constitute a change in its intended use, requires a new 510(k) clearance or, possibly, PMA approval. The FDA requires every manufacturer to make this determination in the first instance, but the FDA may review a manufacturer’s decision. The FDA may not agree with any of our past or future decisions regarding whether new clearances or approvals are necessary. If the FDA requires us to seek 510(k) clearance or PMA approval for any modification to a previously cleared product, we may be required to cease marketing and/or to recall the modified product until we obtain clearance or approval, and we may be subject to significant regulatory fines or penalties. Further, our products could be subject to recall if the FDA determines, for any reason, that our products are not safe, including but not limited to new safety data from use of the product, or manufacturing defects. Any recall or FDA requirement that we seek additional approvals or clearances could result in delays, fines, costs associated with modification of a product, loss of revenue and potential operating restrictions imposed by the FDA

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If we or our suppliers fail to comply with the FDA’s quality system regulations, the manufacture of our products could be delayed.

We and our suppliers are required to comply with the FDA’s quality system regulations, which cover the methods and documentation of the design, testing, production, control, quality assurance, labeling, packaging, storage and shipping of our products. The FDA enforces these quality system regulations through unannounced inspections. If we or one of our suppliers fail a quality system regulations inspection or if any corrective action plan is not sufficient, or is very expensive or time consuming to implement, the manufacture of our products could be delayed until satisfactory corrections are made, or in the event we are unable to correct the problems we may not be able to continue manufacturing and distributing the particular device or devices. Such a delay potentially could disrupt our business, harm our reputation and adversely affect our sales and revenues.

If interventionalists are unable to obtain sufficient reimbursement for procedures performed with our products, it is unlikely that our products will be widely used.

Successful sales of our products will depend on the availability of adequate reimbursement from third-party payors. Healthcare providers that purchase medical devices for treatment of their patients, generally rely on third-party payors to cover the use of the product for the particular procedure and reimburse all or part of the costs and fees associated with the procedures performed with these devices. Currently, the costs of our products distributed domestically are being reimbursed by third party payors. There is no guarantee that coverage and adequate reimbursement will be available in the future for our existing and/or new products. Both public and private insurance reimbursement plans are central to new product acceptance. Neurointerventionalists are unlikely to use our products if they do not receive reimbursement adequate to cover the cost of our products and related procedures.

In international markets, market acceptance may depend, in part, upon the availability of reimbursement within prevailing healthcare payment systems. Reimbursement and healthcare payment systems in international markets vary significantly by country, and include both government sponsored healthcare and private insurance. Currently, the costs of our products distributed internationally, other than in some Latin American countries, are being reimbursed by public and private healthcare insurers. We may not obtain international reimbursement approvals in a timely manner, if at all, our failure to receive international reimbursement approvals would negatively impact market acceptance of our products in the international markets in which those approvals are sought.

In addition, in certain countries, such as France, Germany and Japan, we are required to obtain regulatory clearance for our products to be eligible for reimbursements by third party payors, even though reimbursement for embolic coiling procedures is already in place.

Future reimbursement may be subject to increased restrictions both in the United States and in international markets. Third-party reimbursement and coverage may not be available or adequate in either the United States or international markets. Future legislation, regulation or reimbursement policies of third-party payors may adversely affect the demand for our existing products or our products currently under development and limit our ability to sell our products on a profitable basis.

The adoption of Statement of Financial Accounting Standard No. 123R and changes to existing accounting pronouncements or taxation rules or practices may affect how we conduct our business and affect our reported results of operations.

On April 1, 2006, we adopted the provisions of, and account for stock-based compensation in accordance with, the Financial Accounting Standards Board’s (“FASB”) Statement of Financial Accounting Standards No. 123-revised 2004 (“SFAS 123R”), “Share-Based Payment,” which replaced Statement of Financial Accounting Standards No. 123 (“SFAS 123”), “Accounting for Stock-Based Compensation” and supersedes APB Opinion No. 25 (“APB 25”), “Accounting for Stock Issued to Employees.” Under the fair value recognition provisions of this statement, stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense on a straight-line basis over the requisite service period, which is generally the vesting period. The effective date of this new standard under these new rules for our financial statements was April 1, 2006. Adoption of this statement has had a significant impact on our consolidated financial statements, as we are now

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required to expense the fair value of our stock option grants and stock purchases under our employee stock purchase plan rather than disclose the impact on our net loss within our footnotes. The impact of SFAS 123R on our consolidated financial statements and related disclosures is, and is expected to continue to be, material to our results of operations. Our future stock-based compensation expense will be dependent on a number of factors, including the amount of awards granted and the fair value of those awards at the time of grant, as well as any changes in variables or underlying assumptions used to determine fair value under our pricing model. In addition, a change in accounting pronouncements or taxation rules or practices can have a significant effect on our reported results and may even affect our reporting of transactions completed before the change is effective. Other new accounting pronouncements or taxation rules and varying interpretations of accounting pronouncements or taxation practice have occurred and may occur in the future. Changes to existing rules, future changes, if any, or the questioning of current practices may adversely affect our reported financial results or the way we conduct our business.

We may become subject to product liability claims which could require us to pay damages that exceed our insurance coverage.

Our business exposes us to potential product liability claims that are inherent in the testing, manufacture and sale of medical devices for neurointerventional procedures. These procedures involve significant risk of serious complications, including intracranial bleeding, brain injury, paralysis and even death. Any product liability claim brought against us, with or without merit, could result in the increase of our product liability insurance rates or the inability to secure coverage in the future. In addition, we could have to pay an amount in excess of policy limits, which would have to be paid out of cash reserves. If longer-term patient results and experience indicate that our products or any component cause tissue damage, motor impairment or other adverse effects, we could be subject to significant liability. Finally, even a meritless or unsuccessful product liability claim could harm our reputation in the industry, lead to significant legal fees and could result in the diversion of management’s attention from managing our business.

We may be subject to damages resulting from claims that we or our employees have wrongfully used or disclosed alleged trade secrets of their former employers.

Many of our employees were previously employed at other medical device companies, including our competitors or potential competitors. Although no claims against us are currently pending, we may be subject to claims that these employees have wrongfully used or disclosed alleged trade secrets of their former employers or we have inadvertently or otherwise used or disclosed trade secrets or other proprietary information of their former employers. Litigation may be necessary to defend against these claims. Even if we are successful in defending against these claims, litigation could result in substantial costs and be a distraction to management. If we fail in defending such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel. A loss of key research personnel or their work product could hamper or prevent our ability to commercialize product candidates, which could severely harm our business.

The price of our common stock has fluctuated and we expect will continue to fluctuate substantially and you may not be able to sell your shares at or above your purchase price.

The market price of our common stock has been and we expect will continue to be highly volatile and may fluctuate substantially due to many factors, including:

•  volume and timing of orders for our products;

•  the introduction of new products or product enhancements by us or our competitors;

•  disputes or other developments with respect to intellectual property rights;

•  our ability to develop, obtain regulatory clearance for, and market, new and enhanced products on a timely basis;

•  product liability claims or other litigation;

•  quarterly variations in our or our competitors’ results of operations;

•  sales of large blocks of our common stock, including sales by our executive officers and directors;

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•  changes in governmental regulations or in the status of our regulatory approvals or applications;

•  changes in the availability of third-party reimbursement in the United States or other countries;

•  changes in earnings estimates or recommendations by securities analysts; and

•  general market conditions and other factors, including factors unrelated to our operating performance or the operating performance of our competitors.

Furthermore, to the extent there is an inactive market for our common stock, the value of your shares and your ability to sell your shares at the time you wish to sell them may be impaired. An inactive market may also impair our ability to raise capital by selling shares and may impair our ability to acquire other companies, products or technologies by using our shares as consideration.

Because of their significant stock ownership, our executive officers, directors and principal stockholders will be able to exert control over us and our significant corporate decisions.

Based on shares outstanding at March 31, 2007, our executive officers, directors, and stockholders holding more than 5% of our outstanding common stock and their affiliates, in the aggregate, beneficially owned approximately 33% of our outstanding common stock. As a result, these persons, acting together, may have the ability to determine the outcome of all matters submitted to our stockholders for approval, including the election and removal of directors and any merger, consolidation, or sale of all or substantially all of our assets. This concentration of ownership may harm the market price of our common stock by, among other things:

•  delaying, deferring or preventing a change in control of our company;

•  impeding a merger, consolidation, takeover or other business combination involving our company; or

•  causing us to enter into transactions or agreements that are not in the best interests of all stockholders.

Future sales of our common stock may depress our stock price.

Our current stockholders hold a substantial number of shares of our common stock that they are able to sell in the public market A significant portion of these shares are held by a small number of stockholders. Sales by our current stockholders of a substantial number of shares could significantly reduce the market price of our common stock. Moreover certain holders of our common stock have the right to require us to file registration statements covering their shares or to include their shares in registration statements that we may file for ourselves or other stockholders.

We have registered 4,972,187 shares of common stock that we may issue under our 1998 Stock Plan (the “1998 Plan”), 2005 Equity Incentive Plan (the “2005 Plan”) and 2005 Employee Stock Purchase Plan. These shares can be freely sold in the public market upon issuance. The sale by any of these holders of a large number of securities in the public market could reduce the trading price of our common stock and impede our ability to raise future capital.

We may incur increased costs as a result of recently enacted and proposed changes in laws and regulations.

Recently enacted and proposed changes in the laws and regulations affecting public companies, including the provisions of the Sarbanes-Oxley Act of 2002 and rules proposed by the Securities and Exchange Commission (SEC) and by The NASDAQ Stock Market, could result in increased costs to us. The new rules could make it more difficult or more costly for us to obtain certain types of insurance, including directors’ and officers’ liability insurance, and we may be forced to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. The impact of these events could also make it more difficult for us to attract and retain qualified persons to serve on our board of directors, our board committees or as executive officers. We are presently evaluating and monitoring developments with respect to new and proposed rules and cannot predict or estimate the amount of the additional costs we may incur or the timing of such costs.

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We may become involved in securities class action litigation that could divert management’s attention and harm our business.

The stock market in general, The NASDAQ Stock Market and the market for medical device companies in particular, has experienced extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of those companies. Further, the market prices of securities of medical device companies have been particularly volatile. These broad market and industry factors may materially harm the market price of our common stock, regardless of our operating performance. In the past, following periods of volatility in the market price of a particular company’s securities, securities class action litigation has often been brought against that company. We may become involved in this type of litigation in the future. Litigation often is expensive and diverts management’s attention and resources, which could materially harm our financial condition and results of operations.

We do not intend to pay cash dividends.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain all available funds and any future earnings for use in the operation and expansion of our business and do not anticipate paying any cash dividends in the foreseeable future. In addition, the terms of any future debt or credit facility may preclude us from paying any dividends. As a result, capital appreciation, if any, of our common stock will be your sole source of potential gain for the foreseeable future.

Anti-takeover provisions in our organizational documents and Delaware law may discourage or prevent a change of control, even an acquisition which would be beneficial to our stockholders, and thereby affect our stock price adversely and prevent attempts by our stockholders to replace or remove our current management.

Our amended and restated certificate of incorporation and amended bylaws contain provisions that could delay or prevent a change of control of our company or changes in our board of directors that our stockholders might consider favorable. Some of these provisions:

•  authorize the issuance of preferred stock which can be created and issued by the board of directors without prior stockholder approval, with rights senior to those of the common stock;

•  provide for a classified board of directors, with each director serving a staggered three-year term;

•  prohibit our stockholders from filling board vacancies, calling special stockholder meetings, or taking action by written consent;

•  prohibit our stockholders from making certain changes to our amended and restated certificate of incorporation or bylaws except with 662/3% stockholder approval; and

•  require advance written notice of stockholder proposals and director nominations.

In addition, we are subject to the provisions of Section 203 of the Delaware General Corporation Law, which may prohibit certain business combinations with stockholders owning 15% or more of our outstanding voting stock. These and other provisions in our amended and restated certificate of incorporation, restated bylaws and Delaware law could make it more difficult for stockholders or potential acquirers to obtain control of our board of directors or initiate actions that are opposed by our then-current board of directors, including delaying or impeding a merger, tender offer, or proxy contest involving our company. Any delay or prevention of a change of control transaction or changes in our board of directors could cause the market price of our common stock to decline.

Item 1B.   Unresolved Staff Comments.

None.

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Item 2.   Properties.

Our worldwide headquarters are located in San Jose, California. On June 6, 2005, we entered into a non-cancelable seven-year lease pursuant to which we lease approximately 42,000 square feet of building space with both administrative and manufacturing facilities. Additionally, we lease office space for our three wholly-owned subsidiaries, Micrus SA, Micrus UK and Micrus Design Technology, Inc., under non-cancelable lease agreements with terms through March 2011, December 2010 and February 2008, respectively. We are undertaking an analysis of our facility needs in Doral, Florida and may relocate that facility in the coming year. We otherwise believe that our existing facilities are adequate to meet our current and near term future needs.

Item 3.   Legal Proceedings.

FCPA Investigation

In August 2004, while reviewing our sales and payment procedures, we identified certain payments we made to physicians located in France, Germany, Spain and Turkey that are also likely to have violated the FCPA and the laws of such countries as well as possibly the laws of Switzerland, where our Swiss subsidiary is located. Our audit committee immediately directed our legal counsel to conduct an internal investigation into these payments. In September 2004, we voluntarily disclosed to the DOJ the factual information obtained in our internal investigation of potential violations of the FCPA.

Soon after reaching the preliminary conclusions of the investigation, our Board of Directors adopted a Foreign Corrupt Practices Act Policy and appointed a Compliance Officer. The Compliance Officer has with the assistance of our general counsel and outside legal counsel developed a number of other corporate policies that will govern payments to and contractual agreements with physicians and other consultants. In addition, the employment of our then Chief Executive Officer and our then Vice President of Sales and Marketing was terminated in November 2004.

After reviewing the results of the internal investigation and the compliance procedures implemented by us, the DOJ entered into an agreement (the “DOJ Agreement”) with us in February 2005 pursuant to which it will not prosecute us for the conduct disclosed to the DOJ, and we agreed to: (i) accept responsibility for the actions of our employees and officers, (ii) pay a monetary penalty of $450,000, (iii) continue to cooperate with the DOJ in its investigation, including the waiver of legal privileges, (iv) establish policies and procedures to assure compliance with the FCPA and other relevant bribery laws, (v) retain and pay for an independent law firm to act as a monitor, for purposes of reporting to the DOJ for a period of three years as to our compliance with the DOJ Agreement and monitoring our implementation and adherence to FCPA compliance policies and procedures, and (vi) cooperate fully with the DOJ, the independent monitor and the SEC. We must remain in complete compliance with these conditions for a period of two years, or face the filing of a criminal complaint against us. Moreover, the terms of the DOJ Agreement will bind our successors, or merger partners, as long as the agreement is in effect.

The payments we made to physicians located in France, Germany, Spain and Turkey also may have likely violated the applicable laws in those foreign jurisdictions and may possibly have violated laws in Switzerland, where our Swiss subsidiary is located. We are not able to determine at this time what penalties or other sanctions, if any, authorities in France, Germany, Spain, or Turkey may impose on us, as a result of such violations. Such amounts could be material to our financial position, results of operations or cash flows. We have been notified by the Swiss Federal Prosecutor that it does not intend to bring any action or impose any penalties on us relating to our activities in Switzerland.

Patent Litigation

In September 2004, Boston Scientific Corporation and Target Therapeutics, Inc., a subsidiary of Boston Scientific Corporation, (collectively “Boston Scientific”), filed a patent infringement suit in the United States District Court for the Northern District of California, alleging that our embolic coil products infringe two patents held by Boston Scientific and that this infringement is willful. Sales of our embolic coil products currently represent virtually all of our revenues. Boston Scientific is a large, publicly-traded corporation with significantly greater financial resources than us. In November 2004, we answered Boston Scientific’s complaint and counterclaimed,

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alleging that Boston Scientific’s embolic coil products, and their use, infringe three of our patents. In November 2006, we withdrew one of our three asserted patents from the litigation to pursue a reissue application filed with the United States Trademark and Patent Office (“USPTO”). Each party seeks an injunction preventing the making, using, selling, offering to sell, importing into the U.S. or exporting from the U.S., of the other’s embolic coil products in the United States, damages for past infringement, which may be trebled, and payment of its legal fees and costs. In addition, each party seeks a declaration that the patents of the other are invalid and not infringed and has alleged that certain of the asserted patents of the other are unenforceable due to inequitable conduct.

Boston Scientific is also a party in two other lawsuits against Cordis and ev3/Micro Therapeutics, Inc. in which the Boston Scientific patents, which are the basis of Boston Scientific’s suit against us, are also at issue. An outcome of either of these lawsuits adverse to Cordis or ev3/Micro Therapeutics, Inc., and related to the same patent claims Boston Scientific asserts against us, could have an adverse impact on certain of our defenses in our litigation with Boston Scientific.

In October 2004, Cordis requested ex parte reexamination of certain claims in those patents. In February 2005, the court granted a stay of the Boston Scientific lawsuit against Micrus until the earlier of 12 months or the outcome of the reexamination by the USPTO in the Cordis case. In February 2006, the USPTO issued a Notice of Intent to Issue Ex Parte Reexamination Certificate for one of the two patents, apparently confirming all of the claims of that patent. In February 2006, the USPTO also issued an Office Action in which it apparently confirmed the patentability of certain of the claims in the second patent, but rejected the remainder. Boston Scientific has stated to the USPTO and to the court that the rejected claims from the second patent can be reissued and certified as patentable upon reexamination if a correction is made to the priority chain for the second patent.

In March 2006, the court lifted the stay with respect to any claims that were confirmed as patentable in the reexamination proceedings and has permitted discovery in the case to commence with respect to those claims. Micrus subsequently negotiated with Boston Scientific, and the Court confirmed, a schedule that would permit discovery and claim construction proceedings to proceed for the second patent while it is still undergoing reexamination and reissue proceedings. Since the stay was lifted, Micrus and Boston Scientific have exchanged preliminary infringement and invalidity contentions, expert reports, claim construction briefs, and have deposed each other’s expert witnesses concerning each of the four patents-in-suit. Discovery is ongoing in the case. A hearing on claim construction was held on June 1, 2007. The Court has not calendared any other dates.

From time to time, we may be involved in other litigation relating to claims arising out of our ordinary course of business. We are not currently a party to any other material legal proceedings.

Item 4.   Submission of Matters to a Vote of Security Holders.

None.

PART II

Item 5.   Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Our common stock is traded on The NASDAQ Stock Market under the symbol “MEND.” The following table sets forth the high and low daily bid prices per share of our common stock, as reported by The NASDAQ Stock Market.

Fiscal Year Ended March 31, 2007	High		Low
First Quarter	$	15.00	$	11.57
Second Quarter	$	15.00	$	11.11
Third Quarter	$	20.50	$	11.62
Fourth Quarter	$	25.00	$	18.75

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Fiscal Year Ended March 31, 2006	High		Low
First Quarter (from June 16, 2005)	$	11.40	$	10.75
Second Quarter	$	12.80	$	9.65
Third Quarter	$	10.25	$	6.34
Fourth Quarter	$	14.40	$	8.40

The last reported sale price of our common stock on The NASDAQ Stock Market on May 31, 2007 was $21.39 share. As of May 31, 2007, there were approximately 100 holders of record of our common stock.

Dividend Policy

We have never declared a divided or paid any cash dividends on our common stock. Because we currently intend to retain any future earnings to fund the development and growth of our business, we do not anticipate paying any cash dividends in the near future.

Unregistered Securities Sold in Fiscal 2007

During fiscal 2007, holders exercised 2005 common stock warrants covering 15,476 shares of common stock. No cash proceeds were received by us in connection with the exercises. As of March 31, 2007, there are no outstanding warrants to purchase shares of our stock.

On November 30, 2006, we issued 156,666 unregistered shares of our common stock to VasCon pursuant to Regulation D under the Securities Act of 1933. The shares were issued in partial consideration of the assets that we acquired pursuant to our Asset Purchase Agreement with VasCon.

Use of Proceeds

Our Registration Statement on Form S-1 (File No. 333-123154) related to our initial public offering (“IPO”) was declared effective by the SEC on June 16, 2005. The public offering commenced on June 17, 2005. All 3,250,000 shares of common stock offered in the final prospectus were sold at the initial closing on June 21, 2005, and an additional 250,000 shares of common stock subject to the underwriters’ over-allotment option, were sold at a third closing on July 6, 2005, in each case at a price to public of $11.00 per share (before deducting underwriting discounts and commissions) through a syndicate of underwriters managed by A.G. Edwards and Needham & Company, LLC. The aggregate gross proceeds of the shares offered and sold was $38.5 million, out of which we paid an aggregate of $2.7 million in underwriting discounts and commissions to the underwriters. In addition, as of March 31, 2006, we incurred additional expenses of approximately $2.8 million in connection with the offering, which when added to the underwriting discounts and commissions paid by us, amounts to total expenses of approximately $5.5 million.

We have used and intend to continue to use the net proceeds of the public offering primarily for general corporate purposes, including costs associated with our entry into the Japanese and Chinese market, expansion of our sales force, research and development activities, technology and asset acquisition, facilities expansion and other working capital and capital expenditures. The amounts and timing of our actual expenditures will depend upon numerous factors, including the growth of our sales and marketing activities, status of our research and development efforts and the amount of cash generated by our operations, if any. We have used and may in the future also use a portion of the proceeds for the acquisition of, or investment in, companies, technologies, products or assets that complement our business.

We have not determined the amount of net proceeds to be used specifically for the foregoing purposes. As a result, management will have broad discretion over the proceeds from the IPO. Pending these uses, we intend to invest the net proceeds of the IPO in United States government and short-term investment grade securities.

Issuer Purchases of Equity Securities

We do not have a stock repurchase program and did not repurchase any of our equity securities during the year ended March 31, 2007.

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Securities Authorized for Issuance Under Equity Compensation Plans

						Number of Securities
						Remaining Available for
	Number of Securities					Future Issuance Under
	to be Issued Upon			Weighted Avearge		Equity Compensation
	Exercise of			Exercise Price of		Plans (Excluding
	Outstanding			Outstanding Options		Securities Reflected in
Plan Category	Options and Rights			and Rights		Colum(a))
Equity compensation plans approved by security holders		3,191,556	(1)	$	10.71		1,469,384	(2)
Equity compensation plans not approved by security holders		—			—		—
Total		3,191,556	(1)	$	10.71		1,469,384	(2)

(1)

Includes 1,244,273 shares subject to options outstanding under our 1998 Plan and 1,947,283 shares subject to option outstanding under our 2005 Plan.

(2)

Includes 1,142,658 shares of common stock reserved for future issuance under our 2005 Plan and 326,726 shares of common stock reserved for future issuance under our Purchase Plan. As of April 1, 2007, the number of shares available for issuance under the foregoing plans automatically increased to 1,809,324 shares available for issuance under the 2005 Plan and 548,948 shares available for issuance under the Purchase Plan.

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Stock Performance Graph

Notwithstanding any statement to the contrary in any of the Company’s previous or future filings with the Securities and Exchange Commission, the following information relating to the price performance of the Company’s common stock shall not be deemed “filed” with the Commission or “soliciting material” under the Securities Exchange Act of 1934 and shall not be incorporated by reference into any such filings.

The following graph shows a comparison of cumulative total return for the Company’s common stock, The NASDAQ Composite Index, and The NASDAQ Medical Equipment Index. Such returns are based on historical results and are not intended to suggest future performance. The graph assumes $100 was invested in the Company’s common stock and in each of the indexes on June 16, 2005 (the date the Company’s common stock commenced trading on The NASDAQ Stock Market). Data for The NASDAQ Composite Index and The NASDAQ Medical Equipment Index assume reinvestment of dividends. The Company has never paid dividends on its common stock and has no present plans to do so.

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Item 6.   Selected Financial Data.

The following selected consolidated financial data should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and the consolidated financial statements and the notes thereto included in this report. The selected consolidated statements of operations data for the fiscal years ended March 31, 2007, 2006 and 2005 and the selected consolidated balance sheet data as of March 31, 2007 and 2006 are derived from the audited consolidated financial statements that are included elsewhere in this report. The selected consolidated statements of operations data for the fiscal years ended March 31, 2004 and 2003 and the selected consolidated balance sheet data as of March 31, 2005, 2004 and 2003 are derived from our audited consolidated financial statements not included in this report. The historical results are not necessarily indicative of the results of operations to be expected in any future periods. All per share amounts for all periods presented have been restated to reflect the 1-for-2.25 reverse stock split that became effective on June 10, 2005.

Consolidated Statements of Operations

	Years Ended March 31,
	2007(2)(3)			2006(4)			2005(5)			2004			2003
	(In thousands, except per share data)
Revenues	$	58,795		$	32,781		$	24,012		$	15,700		$	8,287
Cost of goods sold(1)		15,361			9,710			8,003			5,725			3,629
Gross profit		43,434			23,071			16,009			9,975			4,658
Operating expenses:
Research and development(1)		7,904			6,589			2,360			2,927			1,763
Sales and marketing(1)		24,121			15,171			8,781			6,012			4,367
General and administrative(1)		19,308			10,307			11,884			3,511			3,080
Total operating expenses		51,333			32,067			23,025			12,450			9,210
Loss from operations		(7,899	)		(8,996	)		(7,016	)		(2,475	)		(4,552	)
Interest and investment income		1,618			1,295			177			153			95
Interest expense		(14	)		(12	)		(29	)		(20	)		(11	)
Other income (expense), net		565			(632	)		164			328			287
Loss before income taxes		(5,730	)		(8,345	)		(6,704	)		(2,014	)		(4,181	)
Income tax benefit		(247	)		(84	)		—			—			—
Net loss		(5,483	)		(8,261	)		(6,704	)		(2,014	)		(4,181	)
Accretion of redeemable convertible preferred stock to redemption value including beneficial conversion feature		—			(659	)		(588	)		(530	)		(476	)
Net loss attributable to common stockholders	$	(5,483	)	$	(8,920	)	$	(7,292	)	$	(2,544	)	$	(4,657	)
Net loss per share attributable to common stockholders basic and diluted	$	(0.38	)	$	(0.79	)	$	(5.22	)	$	(2.02	)	$	(3.82	)
Weighted-average number of shares used in per share calculation basic and diluted		14,621			11,240			1,397			1,257			1,220

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(1) Includes non-cash stock-based compensation of the following:

	Years Ended March 31,
	2007		2006		2005		2004		2003
Cost of goods sold	$	218	$	26	$	26	$	11	$	—
Research and development	$	222	$	22	$	69	$	207	$	19
Sales and marketing	$	802	$	169	$	134	$	162	$	13
General and administrative	$	1,332	$	172	$	3,210	$	174	$	16

	March 31,
	2007(3)			2006(4)			2005			2004			2003
	(In thousands)
Consolidated Balance Sheet Data:
Total assets	$	73,097		$	62,114		$	29,774		$	17,878		$	8,864
Mandatorily redeemable convertible preferred stock	$	—		$	—		$	58,442		$	49,479		$	39,305
Total stockholders’ equity (deficit)	$	56,294		$	51,316		$	(37,561	)	$	(34,193	)	$	(32,475	)
Accumulated deficit	$	(55,102	)	$	(49,619	)	$	(40,975	)	$	(34,271	)	$	(32,257	)

(2)	In fiscal 2007, loss from operations, net loss and basic and diluted net loss per share include the impact of SFAS 123R, which were not present in prior years. Refer to Notes 2 and 9 of our Notes to Consolidated Financial Statements.
(3)	On November 30, 2006, we completed our acquisition of VasCon. The results of operations of Micrus Design Technology, a newly formed subsidiary, are included in the accompanying consolidated statements of operations for all periods or partial periods subsequent to the acquisition date. Additionally, the acquired assets and liabilities assumed in the acquisition are included in the consolidated balance sheet subsequent to the acquisition date. See Note 3 of “Notes to Consolidated Financial Statements” for further details regarding the transaction.
(4)	On September 20, 2005, we completed our acquisition of Neurologic. The results of operations of Micrus Endovascular UK Limited, a newly formed subsidiary, are included in the accompanying consolidated statements of operations for all periods or partial periods subsequent to the acquisition date. Additionally, the acquired assets and liabilities assumed in the acquisition are included in the consolidated balance sheet subsequent to the acquisition date. See Note 3 of “Notes to Consolidated Financial Statements” for further details regarding the transaction
(5)	In fiscal 2005, loss from operations, net loss and basic and diluted net loss per share include the impact of charges related to option modification of the former CEO’s options. Refer to Note 9 of our Notes to Consolidated Financial Statements.

Item 7.   Management’s Discussion and Analysis of Financial Conditions and Results of Operations.

The following discussion and analysis of the financial condition and results of operations of the Company should be read in conjunction with the consolidated financial statements and the related notes included elsewhere in this report, and with other factors described from time to time in our other filings with the Securities and Exchange Commission. This Annual Report on Form 10-K contains forward-looking statements that involve risks and uncertainties. Actual results and the timing of events may differ materially from those contained in the forward-looking statements due to a number of factors, including those discussed in Part I, Item 1A “Risk Factors” above and elsewhere in this Annual Report on Form 10-K.

Overview

We develop, manufacture and market both implantable and disposable medical devices used in the treatment of cerebral vascular diseases. We also are developing products for the treatment of ischemic disease and have recently launched our first product in this market. Our products are used by interventional neuroradiologists and

40

neurosurgeons to treat cerebral aneurysms responsible for hemorrhagic stroke. Both hemorrhagic and ischemic stroke are significant causes of death worldwide. Our product lines consist of endovascular systems that enable a physician to gain access to the brain in a minimally invasive manner through the vessels of the arterial system. We believe our products provide a safe and reliable alternative to more invasive neurosurgical procedures for treating aneurysms. Our proprietary three-dimensional, embolic coils are unique in that they automatically and rapidly deploy within an aneurysm, forming a scaffold that conforms to a wide diversity of aneurysm shapes and sizes. We also supply accessory devices and products including microcatheters and guidewires used to deliver microcoils and stents for the treatment of cerebral vascular disease. We plan on growing our business by continuing to penetrate our existing markets, bringing new products and technologies to interventional neuroradiologists and neurosurgeons, and by entering new geographic territories such as Asia where we introduced our products in Japan through a distributor. We commenced selling our products in Japan in March 2006.

Our revenues are derived primarily from sales of our microcoils. We also sell access devices, which currently do not account for a significant portion of our revenues. Geographically, our revenues are generally from sales to customers in the Americas, Europe and Asia. Our products are shipped from our facilities in the United States, Switzerland, United Kingdom, and a logistics facility in the Netherlands, to either hospitals or distributors. We invoice our customers upon shipment. In select hospitals, our products are held on consignment, and remain on site, free of charge until used.

We anticipate that our cost of goods sold will generally increase in absolute dollars during those quarters in which our sales increase or we incur additional manufacturing costs in anticipation of the commercial introduction of new products. Furthermore, our gross margin percentage may decrease in those quarters in which we initiate sales of new products or product lines, or enter new geographic territories.

Our product development efforts are primarily focused on expanding our current line of microcoils and broadening our product offerings. In August 2004, we introduced our Cerecyte microcoil product line and since June 2005 we have launched seven new products in the last 18 months, including microcoils, stents, microcatheters and guidewires. We intend to continue this product line expansion with the goal of continuing to increase our per-procedure revenue.

We also intend to continue to expand our direct sales force in the United States and Europe as necessary and enter the Asian markets through distributors. In March 2006, we launched our sales and marketing efforts in Japan through our distribution partner, Goodman. We recorded product sales to Goodman of $8.7 million and $2.2 million in fiscal 2007 and 2006, respectively. The sales to Goodman accounted for 15% of revenues for the year ended March 31, 2007.

We currently anticipate that the broadening of our product line, the worldwide expansion of our direct sales force and our entry into the Asian market will be primarily funded with our currently available cash.

We introduced our first proprietary, three-dimensional microcoil in May 2000. Our revenues have grown from $1.8 million in fiscal 2001 to $58.8 million in fiscal 2007.

Since inception, we have been unprofitable. We have incurred net losses of $5.5 million, $8.3 million and $6.7 million in fiscal 2007, 2006 and 2005, respectively. As of March 31, 2007, we had cash and cash equivalents of $34.5 million. We believe that our current cash position and the cash expected to be generated from product sales will be sufficient to meet our working capital and capital expenditure requirements for at least the next twelve months. There is no assurance that we will be profitable in the foreseeable future as we expand our manufacturing and sales activities and expand geographically. As of March 31, 2007, we had an accumulated deficit of $55.1 million.

Recent Developments

VasCon Acquisition.  On November 30, 2006, we completed the acquisition of VasCon LLC (“VasCon”), a privately held company engaged in the development and manufacture of vascular access and delivery devices. The acquisition of VasCon adds expertise in developing clinically advanced access and catheter systems to our core competencies and provides us with manufacturing capabilities that are expected to lead to cost reductions for a wide range of our products. VasCon’s existing cardio and peripheral vascular products will continue to be sold through

41

non-Micrus distribution channels. Micrus Design Technology, Inc., a newly formed subsidiary, will develop and manufacture neurovascular access and delivery products for us, including our steerable catheter.

The transaction consisted of an up-front payment and additional contingent earn-out payments as described below. The total consideration paid of approximately $5.9 million as of March 31, 2007, consisted of the payment of approximately $2.5 million in cash, the issuance of 156,666 shares of our common stock having an aggregate value of approximately $3.0 million calculated based on the average closing price two days before and the day of the acquisition, and $404,000 in acquisition-related closing costs. Additionally, VasCon may receive certain earn-out payments in an amount not to exceed $10 million based on sales and manufacturing performance as set forth in the asset purchase agreement entered into by the parties. The common stock portion of the up-front payment was placed in escrow to satisfy certain indemnification obligations of VasCon and its members as described in such asset purchase agreement.

The results of operations of VasCon are included in the accompanying consolidated statements of operations for all periods or partial periods subsequent to the acquisition date. The purchase price was allocated to the net tangible and identifiable intangible assets acquired and the liabilities assumed based on their estimated fair values at the date of acquisition as determined by management. As of March 31, 2007, the fair value of the net assets acquired exceeded the up-front purchase consideration resulting in negative goodwill in the amount of $1.6 million. Because the acquisition involves contingent consideration, the negative goodwill has been recorded as a deferred credit (non-current liability) in the consolidated balance sheet and will be reduced by the contingent consideration of up to $10 million that will be paid over the next three years, with any additional contingent consideration being recorded as goodwill.

We acquired certain intangible assets in the amount of $5.2 million in connection with the acquisition of VasCon. These intangible assets are comprised of existing process technology of $4.6 million, existing product technology of $260,000 and patents of $300,000. Purchased intangible assets are being amortized on a straight-line basis over a weighted-average period of approximately seven years.

Secondary Public Offering.  On July 19, 2006 we completed a secondary public offering in which certain stockholders sold 1,270,211 shares of common stock at the public offering price of $11.89 per share. On July 19, 2006, the underwriters purchased 190,531 shares of common stock from us pursuant to the exercise of their over-allotment option. We did not receive any proceeds from the sale of common stock by the selling stockholders. The total cash proceeds from the exercise of the over-allotment option were approximately $2.0 million, net of the underwriting discount and offering expenses. Common stock offering expenses of $0.6 million were incurred by us on behalf of the selling stockholders and were expensed to general and administrative expense in the second quarter of fiscal 2007.

Adoption of SFAS 123R.  On April 1, 2006, we adopted the provisions of Statement of Financial Accounting Standards No. 123 — revised 2004 (“SFAS 123R”). Under the fair value recognition provisions of this Statement, stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense on a straight-line basis over the requisite service period, which is generally the vesting period. We transitioned to SFAS 123R using the modified-prospective method, under which prior periods are not revised for comparative purposes. The valuation provisions of SFAS 123R apply to new grants and to grants that were outstanding prior to the effective date and are subsequently modified. Estimated compensation for grants that were outstanding as of the effective date will be recognized over the remaining service period using the compensation cost estimated for the SFAS 123 pro forma disclosures, excluding pre-IPO options for which the fair value was determined using the minimum value method. For these grants, any remaining unamortized deferred compensation expenses will continue to be accounted for under the intrinsic value method of APB 25.

The adoption of SFAS 123R had and will have a material impact on our consolidated financial position and results of operations. See Note 9 to the consolidated financial statements for further discussion regarding the SFAS 123R disclosures.

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Results of Operations

The following table sets forth the results of our operations, expressed as percentages of revenues, for the years ended March 31, 2007, 2006 and 2005:

	Years Ended March 31,
	2007			2006			2005
	%			%			%
Consolidated Statement of Operations Data:
Revenues		100	%		100	%		100	%
Cost of goods sold		26	%		30	%		33	%
Gross profit		74	%		70	%		67	%
Operating expenses:
Research and development		13	%		20	%		10	%
Sales and marketing		41	%		46	%		36	%
General and administrative		33	%		31	%		50	%
Total operating expenses		87	%		97	%		96	%
Loss from operations		(13	)%		(27	)%		(29	)%
Interest and investment income		3	%		4	%		1	%
Interest expense		0	%		0	%		0	%
Other income (expense), net		1	%		(2	)%		0	%
Loss before income taxes		(9	)%		(25	)%		(28	)%
Income tax benefit		0	%		0	%		0	%
Net loss		(9	)%		(25	)%		(28	)%
Accretion of redeemable convertible preferred stock to redemption value including beneficial conversion feature		0	%		(2	)%		(2	)%
Net loss attributable to common stockholders		(9	)%		(27	)%		(30	)%

Fiscal Years Ended March 31, 2007 and 2006

Revenues

	Years Ended March 31,				Change
	2007		2006		$		%
	(Dollars in thousands)
Americas	$	31,618	$	17,381	$	14,237		82	%
Europe		17,674		12,532		5,142		41	%
Asia Pacific		9,503		2,868		6,635		231	%
Total Revenues	$	58,795	$	32,781	$	26,014		79	%

Our revenues are derived primarily from sales of our microcoils and to a lesser extent sales of accessory devices used in the treatment of cerebral vascular diseases. The overall increase in revenues in fiscal 2007 compared to fiscal 2006 was primarily due to an increase in the number of microcoil products sold during this period. Factors driving the increase included growth in the overall market for embolic coils, an increase in our share of both the domestic and foreign markets in which we participate, expansion of our direct and distributor sales force and the introduction of new products. In fiscal 2007, approximately 16% of our revenues were from sales of products released in the last 18 months, compared with approximately 6% in fiscal 2006. Additionally, the increase in revenues was partially due to higher average selling prices as a result of increased Cerecyte product sales in fiscal 2007. The increase in revenues from Asia Pacific in fiscal 2007 compared to fiscal 2006 was primarily due to

43

product sales during the year to our distributor in Japan. Revenues from Asia Pacific in fiscal 2007 included sales of $8.7 million to our distributor in Japan, compared with the initial sales of $2.2 million in March 2006.

Gross Profit

	Years Ended March 31,				Change
	2007		2006		$		%
	(Dollars in thousands)
Cost of goods sold	$	15,361	$	9,710	$	5,651		58	%
Gross profit		43,434		23,071		20,363		88	%

Cost of goods sold consists of materials, direct labor, overhead costs associated with manufacturing, impairments of inventory, warranty expenses, amortization of intangible assets that were acquired by us as part of the acquisition of VasCon, and amortization of capitalized license technology. The increase in cost of goods sold in fiscal 2007 compared to fiscal year 2006 was primarily due to an increase in personnel and manufacturing costs associated with increased sales of our products as well as increased costs attributable to a general increase in salaries, benefits and overhead costs resulting from increased production (partially offset by increased manufacturing efficiencies). Cost of goods sold in fiscal 2007 includes the amortization of intangibles acquired from the acquisition of VasCon on November 30, 2006 and the amortization of capitalized license fees which we started to amortize in the third quarter of fiscal 2007 when we began selling the Pharos product and generating revenue. Additionally, non-cash stock-based compensation expense included in cost of goods sold was $218,000 and $26,000 in fiscal 2007 and 2006, respectively, with the increase primarily due to the adoption of SFAS 123R.

Gross margin was 74% in fiscal 2007 and 70% in fiscal 2006. The increase was primarily due to an increase in revenue from sales of higher margin products and manufacturing efficiencies, partially offset by higher levels of distributor sales of lower margin products primarily in Japan and certain European markets. We expect our gross margin to fluctuate in future periods based on the mix of our product sales.

Operating Expenses

Research and Development

	Years Ended March 31,				Change
	2007		2006		$		%
	(Dollars in thousands)
Research and development	$	7,904	$	6,589	$	1,315		20	%

Research and development expenses consist primarily of costs associated with the design, development, and testing of products. Such costs are expensed as they are incurred and include salaries and related personnel costs, fees paid to outside consultants, and other direct and indirect costs related to research and product development. Research and development expenses increased in fiscal 2007 compared to fiscal 2006 primarily due to an increase of $1.4 million in outside services and consulting fees related to new product development, an increase of $1.0 million related to increased headcount, an increase of $297,000 in supplies expense, as well as an increase of $200,000 in stock-based compensation expense primarily due to the adoption of SFAS 123R in fiscal 2007. These increases were partially offset by a decrease of $1.9 million primarily due to the purchase of intellectual property from Vascular FX in fiscal 2006. We expect our research and development expenses to increase in absolute dollars in future periods as we hire additional development personnel, continue work on product improvements, and expand our existing product line.

Sales and Marketing

	Years Ended March 31,				Change
	2007		2006		$		%
	(Dollars in thousands)
Sales and marketing	$	24,121	$	15,171	$	8,950		59	%

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Sales and marketing expenses consist primarily of compensation costs of our direct sales force and marketing personnel, as well as overhead costs related to these activities. Also included are costs associated with promotional literature and videos, trade show participation, and education and training of physicians. Sales and marketing expenses increased in fiscal 2007 compared to fiscal 2006 primarily due to an increase of $2.9 million associated with additional sales and marketing personnel in the United States and Europe, higher sales incentive and commission costs of $2.5 million on increased sales in the United States and Europe, an increase of $0.9 million in consulting expenses primarily due to outsourced product marketing functions, higher travel expenses of $0.7 million, an increase of $0.6 million in stock-based compensation expense primarily due to the adoption of SFAS 123R in fiscal 2007, an increase of $395,000 related to tradeshows, graphic design, promotional and printing costs in connection with new product releases, as well as an increase of $361,000 in meetings and conference expenses. We anticipate that sales and marketing expenses will increase in absolute dollars in future periods as we continue to increase the size of our direct sales force and clinical support group, increase spending on additional sales and marketing programs and expand into additional geographic territories.

General and Administrative

	Years Ended March 31,				Change
	2007		2006		$		%
	(Dollars in thousands)
General and administrative	$	19,308	$	10,307	$	9,001		87	%

General and administrative expenses consist primarily of compensation and related costs for finance, human resources, information technology, insurance, and professional services. Professional services are principally comprised of outside legal, audit and information technology consulting. General and administrative expenses increased in fiscal 2007 compared to fiscal 2006 primarily due to an increase of $2.3 million related to higher finance and administrative personnel costs due to increased headcount, an increase of $2.3 million in legal fees primarily in connection with the patent litigation with Boston Scientific, an increase of $1.2 million in stock-based compensation expense primarily due to the adoption of SFAS 123R in fiscal 2007, an increase of $0.7 million in consulting fees in connection with our compliance with Sarbanes Oxley regulations, common stock offering expenses of $0.6 million we incurred on behalf of the selling stockholders in connection with our secondary offering, an increase of $406,000 primarily related to the amortization of identifiable intangible assets in connection with the purchase of Neurologic, an increase in audit fees of $393,000 and an increase of $257,000 in recruiting expense. As we incur additional expenses associated with being a public company and to the extent our business expands, we expect that general and administrative expenses will increase in absolute dollars in future periods.

Other Income, Net

	Years Ended March 31,						Change
	2007			2006			$			%
	(Dollars in thousands)
Interest and investment income	$	1,618		$	1,295		$	323			25	%
Interest expense		(14	)		(12	)		(2	)		17	%
Other income (expense), net		565			(632	)		1,197			(189	)%
Total other income, net	$	2,169		$	651		$	1,518			233	%

Other income, net consists primarily of investment income, interest expense, and foreign currency gains and losses. Total other income, net increased in fiscal 2007 compared to fiscal 2006 primarily due to an increase of $1.1 million related to foreign exchange gains resulting from differences in exchange rates between the time of the recording of the transaction and settlement of foreign currency denominated receivables and payables, and an increase in interest and investment income of $323,000 primarily as a result of higher interest rates and higher cash and investment balances due primarily from proceeds from our IPO and secondary offering. During the first quarter of fiscal 2006, a non-operating charge of $158,000 was recorded as other expense upon the completion of the IPO for the change in fair value of the 2005 common stock warrants.

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Income Taxes

We have incurred net operating losses for both federal and state purposes since inception and, as a result, we have paid no federal or state income taxes. We had a total income tax benefit of approximately $247,000, $84,000 and zero in fiscal 2007, 2006 and 2005, respectively. In fiscal 2007, we accrued a foreign current tax benefit of approximately $63,000 compared to a foreign current tax benefit of $11,000 in fiscal 2006. The current year benefit is primarily attributable to additional benefited losses in the UK for the period after the Neurologic acquisition date. In fiscal 2007, we accrued a foreign deferred tax benefit of approximately $184,000 compared to a foreign deferred tax benefit of $73,000 in fiscal 2006. The increase in foreign deferred tax benefit in fiscal 2007 compared to fiscal 2006 is primarily attributable to an increase in tax benefit for the tax effect of the current year amortization related to the intangible assets acquired in the Neurologic transaction which are not deductible. As of March 31, 2007, we had federal, state and foreign net operating loss carryforwards (“NOLs”) that are available to reduce future taxable income of approximately $36.0 million, $21.5 million and $0.9 million, respectively. The federal NOLs will expire at various dates beginning in 2012, state NOLs will expire beginning in 2008 and the foreign NOLs will expire beginning in 2013. We also have federal and state tax research and development credit carryforwards of approximately $1.0 million and $0.9 million, respectively. The federal tax credit carryforwards will expire beginning in 2012. The state tax credit carryforwards can be carried forward indefinitely. Due to the uncertainty of our ability to generate sufficient taxable income to realize the carryforwards prior to their expiration, we have recorded a valuation allowance at March 31, 2007 to offset our federal and state deferred tax assets. At March 31, 2006, a valuation allowance was recorded to fully offset the deferred tax assets.

Fiscal Years Ended March 31, 2006 and 2005

Revenues

	Years Ended March 31,				Change
	2006		2005		$		%
	(Dollars in thousands)
Americas	$	17,381	$	13,266	$	4,115		31	%
Europe		12,532		10,226		2,306		23	%
Asia Pacific		2,868		520		2,348		452	%
Total Revenues	$	32,781	$	24,012	$	8,769		37	%

Total revenues increased in fiscal 2006 compared to fiscal 2005 primarily due to an increase in the number of microcoil products sold during this period. Factors driving the increase included growth in the overall market for embolic coils, an increase in our share of both the domestic and foreign markets in which we participate and the introduction of new products. Additionally, the increase in revenues was partially due to higher average selling prices as a result of increased Cerecyte product sales in fiscal 2006. Our revenues in fiscal 2006 also included initial sales to our distributor in Japan of $2.2 million.

Gross Profit

	Years Ended March 31,				Change
	2006		2005		$		%
	(Dollars in thousands)
Cost of goods sold	$	9,710	$	8,003	$	1,707		21	%
Gross profit		23,071		16,009		7,062		44	%

Cost of goods sold increased in fiscal 2006 compared to fiscal year 2005 primarily due to an increase in personnel and manufacturing costs associated with increased sales of our products as well as increased costs attributable to a general increase in salaries, benefits and overhead costs resulting from increased production, partially offset by increased manufacturing efficiencies. Additionally, cost of goods sold in fiscal 2005 included a $279,000 impairment of inventory related to design changes to further enhance the handling and performance of the product and a $298,000 impairment of inventory related to products determined to be excess inventories.

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Gross margin was 70% in fiscal 2006 compared to 67% in fiscal 2005. The increase was primarily due to an increase in revenue from sales of higher margin products and manufacturing efficiencies, partially offset by the increase in cost of goods sold of $426,000 due to higher per unit cost of inventory acquired in connection with the purchase of Neurologic that was sold from the acquisition date through the end of fiscal 2006 and import handling fees of $282,000 associated with product shipments through our prior distributor in Japan.

Operating Expenses

Research and Development

	Years Ended March 31,				Change
	2006		2005		$		%
	(Dollars in thousands)
Research and development	$	6,589	$	2,360	$	4,229		179	%

Research and development expenses increased in fiscal 2006 compared to fiscal 2005 primarily due to expenses in connection with the purchase of intellectual property (“IP”) from Vascular FX amounting to $2.5 million, an increase of $277,000 related to evaluating in-process technology, an increase of $0.6 million, in the form of an upfront licensing fee in connection with the Biotronik Agreement, an increase of $0.6 million related to increased headcount, as well as an increase of $192,000 in supplies expense and $143,000 in consulting expense associated with the developing and testing of new products.

Sales and Marketing

	Years Ended March 31,				Change
	2006		2005		$		%
	(Dollars in thousands)
Sales and marketing	$	15,171	$	8,781	$	6,390		73	%

Sales and marketing expenses increased in fiscal 2006 compared to fiscal 2005 primarily due to an increase of $2.6 million associated with additional sales and marketing personnel in the United States and Europe, higher sales incentive and commission costs of $1.1 million on increased sales in the United States and Europe, higher travel expenses of $1.1 million, an increase of $0.6 million related to graphic design, promotional and printing costs in connection with new product releases and the relocation of our offices in the United States, Switzerland, and the United Kingdom, an increase of $277,000 related to consulting expenses incurred primarily due to outsourced product marketing functions, as well as an increase of $98,000 due to a randomized post product release trial with our Cerecyte product.

General and Administrative

	Years Ended
	March 31,				Change
	2006		2005		$			%
	(Dollars in thousands)
General and administrative	$	10,307	$	11,884	$	(1,577	)		(13	)%

General and administrative expenses decreased in fiscal 2006 compared to fiscal 2005 primarily due to a stock-based compensation charge in fiscal 2005 relating to our former Chief Executive Officer (“CEO”) of $3.0 million, a decrease in audit and tax fees of $1.0 million as our general and administrative expenses in fiscal year 2005 included audit and other fees related to the preparation for our IPO and for international tax restructuring and planning, and the monetary penalty of $450,000 pursuant to the agreement we entered into with the Department of Justice (“DOJ”) in February 2005, partially offset by increases of $0.7 million related to higher finance and administrative personnel costs, $388,000 related to the amortization of identifiable intangible assets in connection with the purchase of Neurologic, $358,000 due to higher insurance premiums for our directors and officers insurance policy associated with being a public company, $195,000 related to management bonuses in connection with our IPO, $299,000 associated with investor relations costs and board of directors fees, and $292,000 for regulatory costs associated with entering the Japanese market.

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Other Income, Net

	Years Ended March 31,						Change
	2006			2005			$			%
	(Dollars in thousands)
Interest and investment income	$	1,295		$	177		$	1,118			632	%
Interest expense		(12	)		(29	)		17			(59	)%
Other income (expense), net		(632	)		164			(796	)		(485	)%
Total other income, net	$	651		$	312		$	339			109	%

Other income, net increased in fiscal 2006 compared to fiscal 2005 due to an increase in interest and investment income of $1.1 million primarily as a result of higher interest rates and higher cash and investment balances due primarily from proceeds from our IPO. This was partially offset by higher foreign exchange losses of $0.7 million resulting from differences in exchange rates between the time of the recording of the transaction and settlement of foreign currency denominated receivables and payables, and a non-operating charge of $158,000 recorded upon the completion of our IPO for the change in fair value of the 2005 common stock warrants.

Accretion of Redeemable Convertible Preferred Stock to Redemption Value

Our convertible preferred stock that was outstanding prior to the closing of our initial public offering in June 2005 was redeemable at the request of the holder on or after the sixth anniversary of the original issuance date based upon certain circumstances. This right expired upon the automatic conversion of all of our preferred stock into common stock upon the closing of the IPO. Prior to the closing of the IPO, we were accreting the carrying value of the preferred stock to the mandatory redemption amount on the sixth anniversary using the effective interest method through periodic charges to additional paid-in capital. We recorded a non-cash charge of $276,000 and $0.6 million for the accretion on our redeemable convertible preferred stock in fiscal 2006 and 2005, respectively.

Beneficial Conversion Feature

The difference between the proceeds allocated to the Series E preferred stock and the estimated fair value of the common stock issuable upon conversion resulted in a beneficial conversion feature on the Series E preferred stock which was recorded as a reduction to the Series E preferred stock and an increase to additional paid-in-capital. The total beneficial conversion feature was $383,000 which, prior to the completion of the IPO, was being amortized as a reduction of net income available to common stockholders over the period of redemption of the Series E preferred stock. Upon completion of the IPO, we recorded a non-cash charge of $383,000 for the beneficial conversion feature on our Series E preferred stock in the first quarter of fiscal 2006.

Liquidity and Capital Resources

	Years Ended March 31,
	2007			2006			2005
Cash flow activities:
Net cash used in operating activities	$	(556	)	$	(9,055	)	$	(3,402	)
Net cash (used in) provided by investing activities	$	(5,451	)	$	(5,940	)	$	2,462
Net cash provided by financing activities	$	5,098		$	35,666		$	11,255

Since our inception, we have funded our operations primarily through issuances of stock and related warrants. From November 1996 to March 2005, issuances of convertible preferred stock and related warrants provided us with aggregate proceeds of $59.9 million, net issuance costs. On June 21, 2005, we completed an IPO in which we sold 3,250,000 shares of our common stock at $11.00 per share for net cash proceeds to us of approximately $33.2 million, net of underwriting discounts and commissions. On July 6, 2005, we sold an additional 250,000 shares of common stock at $11.00 per share pursuant to the over-allotment option granted to the underwriters. Together with the over-allotment shares sold by us, cash proceeds to us in the offering were approximately $33.0 million, net of underwriting discounts and offering expenses. On July 19, 2006 we completed a

48

secondary public offering in which certain stockholders sold 1,270,211 shares of common stock at the public offering price of $11.89 per share. On July 19, 2006, the underwriters purchased 190,531 shares of common stock from us pursuant to their over-allotment option. We did not receive any proceeds from the sale of common stock by the selling stockholders. The total cash proceeds from the over-allotment were approximately $2.0 million, net of the underwriting discount and offering expenses. Common stock offering expenses of $0.6 million were incurred by us on behalf of the selling stockholders and were expensed to general and administrative expense in the second quarter of fiscal 2007.

As of March 31, 2007, we had cash and cash equivalents of $34.5 million, compared to $36.1 million at March 31, 2006. We believe that our current cash position and the cash expected to be generated from product sales will be sufficient to meet our working capital and capital expenditure requirements for at least the next twelve months.

Net cash used in operating activities was $0.6 million during fiscal 2007 compared to $9.1 million during fiscal 2006 and $3.4 million during fiscal 2005. Net cash used in operating activities during fiscal 2007 resulted primarily from operating losses, an increase in inventory due to the buildup of finished goods inventory in anticipation of future sales and an increase in the number of consignment locations, an increase in prepaid expenses and other current assets primarily related to the payment of directors and officers insurance premiums, a decrease in accounts payable due to timing of payments made to our vendors and a decrease in other non current liabilities primarily related to contingent purchase price associated with the VasCon acquisition. These factors were partially offset by a decrease in accounts receivable due to improved collection efforts which resulted in lower days sales outstanding, an increase in accrued payroll and related expenses attributable to increased headcount and the timing of payroll payments, an increase in accrued liabilities due to higher accrued professional fees associated with legal fees and Sarbanes Oxley compliance and higher VAT payables, and non-cash items such as stock-based compensation expense primarily due to the adoption of SFAS 123R, depreciation and amortization, and provision for excess and obsolete of inventories.

Net cash used in operating activities during fiscal 2006 resulted primarily from operating losses, an increase in accounts receivable due to an increase in the number of microcoil products sold, including the initial sales to our distributor in Japan in March 2006, and a decrease in accounts payable primarily attributable to payments of audit fees related to our IPO and payments to the DOJ and payment of other legal costs related to Foreign Corrupt Practices Act (“FCPA”) matters. These factors were partially offset by an increase in accrued payroll and related expenses due to increased headcount, an increase in accrued liabilities primarily arising from import handling fees associated with shipments to Japan and the short-term portions of deferred revenue recorded for the upfront payment under our distribution agreement with Goodman and an increase in non-current liabilities primarily consisting of a deferred tax liability recorded in connection with the Neurologic acquisition and the long-term portion of deferred revenue recorded for the upfront payment pursuant to our distribution agreement with Goodman.

Net cash used in operating activities during fiscal 2005 resulted primarily from operating losses, an increase in accounts receivable due to an increase in the number of microcoils sold and an increase in inventory primarily due to an increase in the number of consignment locations. These factors were partially offset by an increase in stock-based compensation expense primarily resulting from a charge for stock options modified in connection with our settlement agreement with our former chief executive officer, an increase in accrued payroll and related expenses attributable primarily to increased headcount and an increase in accounts payable attributable to audit fees related to our IPO and monetary penalties assessed by the DOJ and legal costs incurred relating to FCPA issues.

Net cash used in investing activities was $5.5 million during fiscal 2007, compared to $5.9 million during fiscal 2006 and net cash provided by investing activities of $2.5 million during fiscal 2005. Net cash used in investing activities during fiscal 2007 was primarily related to the acquisition of VasCon, earn-out payment associated with the purchase of Neurologic, the milestone payment to Biotronik which has been capitalized as licensed technology and the purchase of capital equipment partially offset by proceeds from the sale of marketable securities. Net cash used in investing activities during fiscal 2006 was primarily related to the purchase of Neurologic, the purchase of capital equipment primarily related to the relocation of our corporate headquarters and manufacturing facilities, and the milestone payment to Biotronik which has been capitalized as capitalized license technology. Net cash provided

49

by investing activities during fiscal 2005 was primarily related to the proceeds from sales of marketable securities, partially offset by the purchase of capital equipment.

Net cash provided by financing activities was $5.1 million during fiscal 2007, compared to $35.7 million during fiscal 2006 and $11.3 million during fiscal 2005. Net cash provided by financing activities during fiscal 2007 consisted of net proceeds from the exercise of the over-allotment option by the underwriters in connection with our secondary offering, and proceeds from the exercise of stock options and the purchase of common stock under our employee stock purchase plan. Net cash provided by financing activities during fiscal 2006 primarily consisted of net proceeds from the sale of common stock in our IPO, net proceeds from the over-allotment option exercise by the underwriters, proceeds from the exercise of preferred and common stock warrants, and proceeds from the exercise of stock options and purchased common stock under our employee stock purchase plan, partially offset by payments related to issuance costs for preferred stock. Net cash provided by financing activities during fiscal 2005 primarily consisted of net proceeds from the issuance of Series E preferred stock and warrants and proceeds from the exercise of stock options and preferred stock warrants, partially offset by the expenditures incurred in preparation for the IPO.

To the extent that existing cash and cash generated from operations are insufficient to fund our future activities, we may need to raise additional funds through public or private equity or debt financing. Although we are currently not a party to any definitive agreement with respect to potential investments in, or acquisitions of, complementary businesses, services or technologies, we may enter into such agreements in the future, which could require us to seek additional funds through public or private equity or debt financing. Additional funds may not be available on terms favorable to us or at all.

Critical Accounting Policies and Estimates

We prepare our consolidated financial statements in accordance with accounting principles generally accepted in the United States (GAAP). In doing so, we have to make estimates and assumptions that affect our reported amounts of assets, liabilities, revenues and expenses, as well as related disclosure of contingent assets and liabilities. In many cases, we could reasonably have used different accounting policies and estimates. In some cases, changes in the accounting estimates are reasonably likely to occur from period to period. Accordingly, actual results could differ materially from our estimates. To the extent that there are material differences between these estimates and actual results, our financial condition or results of operations will be affected. We base our estimates on past experience and other assumptions that we believe are reasonable under the circumstances, and we evaluate these estimates on an ongoing basis. We refer to accounting estimates of this type as critical accounting policies and estimates, which we discuss below. Our management has reviewed our critical accounting policies and estimates with our accounting advisors, audit committee and board of directors.

Although our significant policies are more fully described in Note 2 to our Consolidated Financial Statements appearing at the end of this report, we believe the following accounting policies to be critical to the judgment and estimates used in the preparation of our consolidated financial statements.

Revenue Recognition.  Our revenues are derived primarily from the sale of our microcoil product line and related equipment and accessories to hospitals and third-party distributors.

Revenues are recognized when evidence of an arrangement exists, delivery to the customer has occurred, the selling price is fixed or determinable and collectibility is reasonably assured. Revenues are recognized generally upon shipment, after the receipt of a replenishment or purchase order, except sales made to our South American distributors. Due to longer delays in receiving payments and a higher level of write-offs relating to our South American distributors, we have been unable to conclude that collectibility is reasonably assured at the time that the customer takes title to the inventory on sales to this class of customers. Accordingly, for this class of customers, we recognize revenues when collectibility is reasonably assured which is generally when cash is collected.

Allowance for Doubtful Accounts.  In estimating the collectibility of our accounts receivable, we analyze historical bad debts, customer concentrations, customer credit-worthiness, current economic trends, and changes in customer payment terms. We regularly review the adequacy of our accounts receivable allowance after considering changes in customers’ financial condition and the aging of account receivable balances. If there are unanticipated future events, this allowance may need to be adjusted.

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Our accounts receivable balance was $8.2 million and $8.3 million, net of allowances for doubtful accounts and for product returns of $234,000 and $317,000 at March 31, 2007 and 2006, respectively.

Excess and Obsolete Inventory.  We calculate an inventory provision for estimated obsolescence or excess inventories based upon historical turnover and assumptions about future demand for our products and market conditions. Our products have a three-year shelf life, with the exception of our Cerecyte microcoils, which have a two-year shelf life. Our products are subject to demand fluctuations based on the availability and demand for alternative products. Our inventory, which consists primarily of microcoils, is at risk of obsolescence following the introduction and development of new or enhanced products. Our estimates and assumptions for excess and obsolete inventory are reviewed and updated on a quarterly basis. The estimates we use for demand are also used for near-term capacity planning and inventory purchasing and are consistent with our revenue forecasts. Future product introductions and related inventories may require additional provision based upon changes in market demand or introduction of competing technologies. Increases in the provision for excess and obsolete inventories result in a corresponding expense to cost of goods sold.

Accounting for Income Taxes.  Significant management judgment is required in determining our provision for income taxes, our deferred tax assets and liabilities and any valuation allowance recorded against our net deferred tax assets. We have recorded a valuation allowance on our federal and state net deferred tax assets as of March 31, 2007 and a full valuation allowance on our net deferred tax assets as of March 31, 2006, due to uncertainties related to our ability to utilize our deferred tax assets in the foreseeable future. These deferred tax assets primarily consist of certain net operating loss carry forwards and research and development tax credits.

Stock-based Compensation.  We adopted the provisions of, and account for stock-based compensation in accordance with, SFAS 123R on April 1, 2006. We elected the modified-prospective method, under which prior periods are not revised for comparative purposes. Under the fair value recognition provisions of this statement, stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense on a straight-line basis over the requisite service period, which is generally the vesting period.

Due to the adoption of SFAS 123R, some exercises result in tax deductions in excess of previously recorded benefits based on the option value at the time of grant, or windfalls. We recognize windfall tax benefits associated with the exercise of stock options directly to stockholders’ equity only when realized. Accordingly, deferred tax assets are not recognized for net operating loss carryforwards resulting from windfall tax benefits occurring from April 1, 2006 onward. A windfall tax benefit occurs when the actual tax benefit realized by the company upon an employee’s disposition of a share-based award exceeds the deferred tax asset, if any, associated with the award that the company had recorded. When assessing whether a tax benefit relating to share-based compensation has been realized, we have elected to follow the tax law ordering method, under which current year share-based compensation deductions are assumed to be utilized before net operating loss carryforwards and other tax attributes. Also, we have elected to ignore the indirect tax effects of share-based compensation deductions in computing our research and development tax credit. We will recognize the full effect of these deductions in the statements of operations when the valuation allowance is released.

We currently use the Black-Scholes option pricing model to determine the fair value of stock options and employee stock purchase plan shares. The determination of the fair value of stock-based payment awards on the date of grant using an option-pricing model is affected by our stock price as well as assumptions regarding a number of complex and subjective variables. These variables include our expected stock price volatility over the term of the awards, actual and projected employee stock option exercise behaviors, risk-free interest rate and expected dividends.

Because there is insufficient historical information available to estimate the expected term of the stock-based awards, we adopted the simplified method for estimating the expected term pursuant to SAB 107. On this basis, we estimated the expected term of options granted by taking the average of the vesting term and the contractual term of the option. The expected volatility used in the valuation model is based our peer group in the industry in which we do business and our historical volatility since our IPO.

We are required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. We use historical data to estimate pre-vesting option forfeitures and record stock-based compensation expense only for those awards that are expected to vest. All stock-based payment awards are amortized on a straight-line basis over the requisite service periods of the awards, which are generally the vesting periods.

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If factors change and we employ different assumptions for estimating stock-based compensation expense in future periods or if we decide to use a different valuation model, the future periods may differ significantly from what we have recorded in the current period and could materially affect our loss from operations, net loss and net loss per share.

The Black-Scholes option-pricing model was developed for use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable, characteristics not present in our option grants and employee stock purchase plan shares. Existing valuation models, including the Black-Scholes and lattice binomial models, may not provide reliable measures of the fair values of our stock-based compensation. Consequently, there is a risk that our estimates of the fair values of our stock-based compensation awards on the grant dates may bear little resemblance to the actual values realized upon the exercise, expiration, early termination or forfeiture of those stock-based payments in the future. Certain stock-based payments, such as employee stock options, may expire worthless or otherwise result in zero intrinsic value as compared to the fair values originally estimated on the grant date and reported in our financial statements. Alternatively, value may be realized from these instruments that are significantly higher than the fair values originally estimated on the grant date and reported in our financial statements. There currently is no market-based mechanism or other practical application to verify the reliability and accuracy of the estimates stemming from these valuation models, nor is there a means to compare and adjust the estimates to actual values.

The guidance in SFAS 123R and SAB 107 is relatively new. The application of these principles may be subject to further interpretation and refinement over time. There are significant differences among valuation models, and there is a possibility that we will adopt different valuation models in the future. This may result in a lack of consistency in future periods and materially affect the fair value estimate of stock-based payments. It may also result in a lack of comparability with other companies that use different models, methods and assumptions. See Note 9 to our consolidated financial statements for further information regarding the SFAS 123R.

Recent Accounting Pronouncements

In July 2006, FASB issued Financial Accounting Standards Interpretation No. 48 (“FIN 48”), “Accounting for Uncertainty in Income Taxes — an interpretation of FASB Statement No. 109.” FIN 48 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a company’s income tax return, and also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. FIN 48 utilizes a two-step approach for evaluating tax positions. Step one, Recognition, occurs when a company concludes that a tax position is more likely than not to be sustained upon examination. Step two, Measurement, is based on the largest amount of benefit, which is more likely than not to be realized on ultimate settlement. FIN 48 is effective for fiscal years beginning after December 15, 2006, with the cumulative effect of the change in accounting principle to be recorded as an adjustment to the beginning balance of retained earnings and therefore are effective for us in the first quarter of fiscal 2008. We are currently in the process of evaluating the effects of adopting FIN 48 and the impact of adoption on our consolidated financial position, results of operations or cash flows.

In September 2006, the FASB issued SFAS 157, “Fair Value Measurements.” SFAS 157 defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosures about fair value measurements. SFAS 157 applies to other accounting pronouncements that require or permit fair value measurements, the FASB having previously concluded in those accounting pronouncements that fair value is the relevant measurement attribute. Accordingly, this Statement does not require any new fair value measurements. However, for some entities, the application of SFAS 157 will change current practice. The provisions of SFAS 157 are effective as of the beginning of our 2009 fiscal year. We are currently evaluating the impact of SFAS 157, but do not expect the adoption of SFAS 157 to have a material impact on our consolidated financial position, results of operations or cash flows.

In February 2007, the FASB issued SFAS 159, “The Fair Value Option for Financial Assets and Financial Liabilities,” which expands opportunities to use fair value measurements in financial reporting and permits entities to choose to measure many financial instruments and certain other items at fair value. SFAS 159 is effective for fiscal years beginning after November 15, 2007. We are currently evaluating SFAS 159 to determine its impact on our consolidated financial position, results of operations or cash flows.

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Contractual Obligations

We have obligations under non-cancelable operating leases with various expiration dates through 2013 and purchase commitments for inventory, capital equipment and operating expenses, such as materials for research and development and consulting.

As of March 31, 2007, our contractual commitments were as follows:

	Payments Due by Period
			Less Than		1-3		3-5		Beyond
Contractual obligations:	Total		1 Year		Years		Years		5 Years
Non-cancelable operating lease obligations	$	3,521	$	738	$	1,871	$	912	$	—
Purchase commitments		2,508		2,508		—		—		—
Total	$	6,029	$	3,246	$	1,871	$	912	$	—

We paid the second year earn-out amount associated with the purchase of Neurologic in April 2007. The future earn-out payments will be one-third of Neurologic’s product sales during specified periods.

We are required to pay future earn-out amounts associated with the purchase of VasCon. The future earn-out payments will be an amount not to exceed $10 million based on the sales and manufacturing performance of Micrus Design Technology, Inc. as set forth in the asset purchase agreement.

Item 7A.   Quantitative and Qualitative Disclosures About Market Risk.

Foreign Currency Market Risks.  Historically, we have been exposed to risks from fluctuations in currency exchange rates due to intercompany loans made to Micrus SA, our Swiss subsidiary, in 2001 in connection with its incorporation. These loans are denominated in Swiss francs and will fluctuate in value against the U.S. dollar, causing us to recognize foreign exchange gains and losses. The functional currency of our Swiss subsidiary is the Swiss franc. The functional currency of our UK subsidiary is the pound sterling. In Europe, our revenues are denominated in Swiss francs, euros, pounds sterling and other currencies. Accordingly, we are exposed to market risk related to changes between the Swiss franc and these other currencies. If the Swiss franc appreciates against the currencies in which our receivables are denominated, we will recognize foreign currency losses. For the preparation of our consolidated financial statements, the financial results of our Swiss subsidiary are translated into U.S. dollars based on average exchange rates during the applicable period. A hypothetical 10% decline in the value of the Swiss franc versus the U.S. dollar would cause us to recognize a loss of $167,000 related to our loan with Micrus SA and a $12,000 decrease in our comprehensive loss from our investment in Micrus SA. A hypothetical 10% decline in the value of the pound sterling versus the U.S. dollar would cause us to recognize a $200,000 decrease in our comprehensive loss from our investment in Micrus UK. A hypothetical 10% decline in the value of the Euro versus the Swiss franc would cause us to recognize a loss of $226,000 based on our foreign denominated receivables as of March 31, 2007.

In fiscal 2007, approximately 31% of our revenues was denominated in currencies other than the U.S. dollar. In future periods, we believe a greater portion of our revenues could be denominated in currencies other than the U.S. dollar, thereby increasing our exposure to exchange rate gains and losses on non-U.S. currency transactions. We do not currently enter into forward exchange contracts to hedge exposure denominated in foreign currencies or any other derivative financial instruments for trading or speculative purposes. In the future, if we believe our currency exposure merits, we may consider entering into transactions to help mitigate that risk.

Interest Rate Market Risk.  Our cash is invested in bank deposits and money market funds denominated in U.S. dollars. The carrying value of these cash equivalents approximates fair market value. Our investments in marketable securities are subject to interest rate risk, which is the risk that our financial condition and results of operations could be adversely affected due to movements in interest rates.

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Item 8.   Financial Statements and Supplementary Data.

Index to Consolidated Financial Statements

	Page
Report of Independent Registered Public Accounting Firm		55
Consolidated Balance Sheets		57
Consolidated Statements of Operations		58
Consolidated Statements of Changes in Stockholders’ Equity (Deficit)		59
Consolidated Statements of Cash Flows		61
Notes to Consolidated Financial Statements		62
Supplementary Data
Schedule II — Valuation and Qualifying Accounts		95

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders

of Micrus Endovascular Corporation

We have completed an integrated audit of Micrus Endovascular Corporation’s fiscal year 2007 consolidated financial statements and of its internal control over financial reporting as of March 31, 2007 and audits of its March 31, 2006 and March 31, 2005 consolidated financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Our opinions, based on our audits, are presented below.

Consolidated financial statements and financial statement schedule

In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of Micrus Endovascular Corporation and its subsidiaries at March 31, 2007 and March 31, 2006, and the results of their operations and their cash flows for each of the three years in the period ended March 31, 2007 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the accompanying index presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. These financial statements and financial statement schedule are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements and financial statement schedule based on our audits. We conducted our audits of these statements 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 of financial statements includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

As discussed in Note 2 and 9 to the Notes to Consolidated Financial Statements, the Company changed the manner in which it accounts for share-based compensation in fiscal year 2007.

Internal control over financial reporting

Also, in our opinion, management’s assessment, included in Management’s Report on Internal Control Over Financial Reporting appearing under Item 9A, that the Company maintained effective internal control over financial reporting as of March 31, 2007 based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO), is fairly stated, in all material respects, based on those criteria. Furthermore, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of March 31, 2007, based on criteria established in Internal Control — Integrated Framework issued by the 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 opinions on management’s assessment and on the effectiveness of the Company’s internal control over financial reporting based on our audit. We conducted our audit of internal control over financial reporting 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. An audit of internal control over financial reporting includes 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 consider necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinions.

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

55

includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) 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 (iii) 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.

As described in Management’s Report on Internal Control Over Financial Reporting appearing under Item 9A, management has excluded Micrus Design Technology, Inc., from its assessment of internal control over financial reporting as of March 31, 2007 because it was acquired by the Company in a purchase business combination during the third quarter of fiscal 2007. We have also excluded Micrus Design Technology, Inc. from our audit of internal control over financial reporting. Micrus Design Technology, Inc. is a wholly-owned subsidiary whose total assets and total revenues represent 11% and 1%, respectively, of the related consolidated financial statement amounts as of and for the year ended March 31, 2007.

/s/  PricewaterhouseCoopers LLP

San Jose, California

June 7, 2007

56

MICRUS ENDOVASCULAR CORPORATION

Consolidated Balance Sheets

	March 31,
	2007			2006
	(In thousands, except share and per share amounts)
ASSETS
Current Assets:
Cash and cash equivalents	$	34,536		$	36,104
Short-term investments		—			984
Accounts receivable, net of allowance for doubtful accounts of $234 and $317 at March 31, 2007 and 2006, respectively		8,168			8,267
Inventories		9,049			4,479
Prepaid expenses and other current assets		1,442			766
Total current assets		53,195			50,600
Property and equipment, net		4,648			2,488
Goodwill		5,552			3,309
Intangible assets, net		9,405			5,417
Other assets		297			300
Total assets	$	73,097		$	62,114
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current Liabilities:
Accounts payable	$	1,660		$	2,088
Accrued payroll and other related expenses		6,145			3,147
Accrued liabilities		6,288			4,308
Total current liabilities		14,093			9,543
Other non-current liabilities		2,710			1,255
Total liabilities		16,803			10,798
Commitments and contingencies (Note 6)
Stockholders’ equity:
Preferred stock, $0.01 par value;
Authorized: 1,000,000 shares; none issued and outstanding		—			—
Common stock, $0.01 par value;
Authorized: 50,000,000 shares
Issued and outstanding:15,249,057 shares and 14,190,287 shares at March 31, 2007 and 2006, respectively		152			142
Additional paid-in capital		111,920			101,430
Deferred stock-based compensation		(164	)		(397	)
Accumulated other comprehensive loss		(512	)		(240	)
Accumulated deficit		(55,102	)		(49,619	)
Total stockholders’ equity		56,294			51,316
Total liabilities and stockholders’ equity	$	73,097		$	62,114

The accompanying notes are an integral part of these consolidated financial statements.

57

MICRUS ENDOVASCULAR CORPORATION

Consolidated Statements of Operations

	Years Ended March 31,
	2007			2006			2005
	(In thousands, except
	per share amounts)
Revenues	$	58,795		$	32,781		$	24,012
Cost of goods sold		15,361			9,710			8,003
Gross profit		43,434			23,071			16,009
Operating expenses:
Research and development		7,904			6,589			2,360
Sales and marketing		24,121			15,171			8,781
General and administrative		19,308			10,307			11,884
Total operating expenses		51,333			32,067			23,025
Loss from operations		(7,899	)		(8,996	)		(7,016	)
Interest and investment income		1,618			1,295			177
Interest expense		(14	)		(12	)		(29	)
Other income (expense), net		565			(632	)		164
Loss before income taxes		(5,730	)		(8,345	)		(6,704	)
Income tax benefit		(247	)		(84	)		—
Net loss		(5,483	)		(8,261	)		(6,704	)
Accretion of redeemable convertible preferred stock to redemption value including beneficial conversion feature		—			(659	)		(588	)
Net loss attributable to common stockholders	$	(5,483	)	$	(8,920	)	$	(7,292	)
Net loss per share attributable to common stockholders:
Basic and diluted	$	(0.38	)	$	(0.79	)	$	(5.22	)
Weighted-average number of shares used in per share calculations:
Basic and diluted		14,621			11,240			1,397

The accompanying notes are an integral part of these consolidated financial statements.

58

MICRUS ENDOVASCULAR CORPORATION

Consolidated Statements of Changes in Stockholders’ Equity (Deficit)

											Accumulated						Total
					Additional			Deferred			Other						Stockholders’
	Common Stock				Paid-in			Stock-Based			Comprehensive			Accumulated			Equity
	Shares		Amount		Capital			Compensation			Loss			Deficit			(Deficit)
	(In thousands)
Balance at March 31, 2004		1,261	$	13	$	1,365		$	(1,032	)	$	(268	)	$	(34,271	)	$	(34,193	)
Comprehensive loss:
Net loss		—		—		—			—			—			(6,704	)		(6,704	)
Translation adjustments		—		—		—			—			(56	)		—			(56	)
Change in unrealized loss on available-for-sale investments		—		—		—			—			(44	)		—			(44	)
Total comprehensive loss																		(6,804	)
Issuance of common stock in exchange for in-process technology		4		—		25			—			—			—			25
Accretion of redeemable convertible preferred stock to redemption value		—		—		(588	)		—			—			—			(588	)
Beneficial conversion feature related to issuance of Series E preferred stock		—		—		383			—			—			—			383
Exercise of stock options		203		2		175			—			—			—			177
Amortization of deferred stock-based compensation		—		—		—			265			—			—			265
Deferred stock-based compensation associated with stock options forfeited		—		—		(137	)		137			—			—			—
Non-employee stock-based compensation		—		—		189			—			—			—			189
Stock-based compensation related to option modification		—		—		2,985			—			—			—			2,985
Balance at March 31, 2005		1,468		15		4,397			(630	)		(368	)		(40,975	)		(37,561	)
Comprehensive loss:
Net loss		—		—		—			—			—			(8,261	)		(8,261	)
Translation adjustments		—		—		—			—			92			—			92
Change in unrealized loss on available-for-sale investments		—		—		—			—			36			—			36
Total comprehensive loss																		(8,133	)
Issuance of common stock in connection with the initial public offering (“IPO”), net of issuance costs		3,250		33		30,439			—			—			—			30,472
Conversion of preferred stock to common stock in connection with the IPO		7,920		79		59,148			—			—			—			59,227
Exercise of over-allotment by underwriters		250		3		2,555			—			—			—			2,558
Reclassification of liability for Series E preferred stock warrants upon IPO		—		—		3,358			—			—			—			3,358
Beneficial conversion feature related to issuance of Series E preferred stock		—		—		—			—			—			(383	)		(383	)
Accretion of preferred stock		—		—		(276	)		—			—			—			(276	)

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MICRUS ENDOVASCULAR CORPORATION

Consolidated Statements of Changes in Stockholders’ Equity (Deficit) — (Continued)

											Accumulated						Total
					Additional			Deferred			Other						Stockholders’
	Common Stock				Paid-in			Stock-Based			Comprehensive			Accumulated			Equity
	Shares		Amount		Capital			Compensation			Loss			Deficit			(Deficit)
	(In thousands)
Exercise of common stock warrants		699		6		863			—			—			—			869
Exercise of stock options		563		6		459			—			—			—			465
Issuance of common stock under employee stock purchase plan		40		—		333			—			—			—			333
Amortization of deferred stock-based compensation		—		—		—			229			—			—			229
Deferred stock-based compensation associated with stock options forfeited		—		—		(4	)		4			—			—			—
Non-employee stock-based compensation		—		—		160			—			—			—			160
Payment for fractional shares on stock split		—		—		(2	)		—			—			—			(2	)
Balance at March 31, 2006		14,190		142		101,430			(397	)		(240	)		(49,619	)		51,316
Comprehensive loss:
Net loss		—		—		—			—			—			(5,483	)		(5,483	)
Translation adjustments		—		—		—			—			(283	)		—			(283	)
Change in unrealized loss on available-for-sale investments		—		—		—			—			11			—			11
Total comprehensive loss																		(5,755	)
Exercise of over-allotment by underwriters		190		2		2,037			—			—			—			2,039
Issuance of common stock in connection with VasCon acquisition		157		2		2,970			—			—			—			2,972
Exercise of common stock warrants		15		—		—			—			—			—			—
Exercise of stock options		619		6		2,298			—			—			—			2,304
Issuance of common stock under employee stock purchase plan		78		—		755			—			—			—			755
Stock-based compensation under SFAS 123R (including amount capitalized in inventory of $89)		—		—		2,293			—			—			—			2,293
Amortization of deferred stock-based compensation		—		—		—			213			—			—			213
Deferred stock-based compensation associated with stock options forfeited		—		—		(20	)		20			—			—			—
Non-employee stock-based compensation		—		—		157			—			—			—			157
Balance at March 31, 2007		15,249	$	152	$	111,920		$	(164	)	$	(512	)	$	(55,102	)	$	56,294

The accompanying notes are an integral part of these consolidated financial statements.

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MICRUS ENDOVASCULAR CORPORATION

Consolidated Statement of Cash Flows

	Years Ended March 31,
	2007			2006			2005
	(In thousands)
Cash flows from operating activities:
Net loss	$	(5,483	)	$	(8,261	)	$	(6,704	)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		2,143			989			505
Provision for doubtful accounts		(84	)		102			11
Loss on disposal of equipment		4			1			2
Provision for excess and obsolete inventories		279			264			734
Increase in fair value of 2005 common stock warrants		—			158			—
Realized (gain) loss on investments		(4	)		5			16
Stock-based compensation		2,574			389			3,439
Changes in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable		601			(4,005	)		(1,385	)
Inventories		(3,810	)		(239	)		(2,470	)
Prepaid expenses and other current assets		(645	)		(134	)		(159	)
Other assets		19			(208	)		(28	)
Accounts payable		(437	)		(938	)		1,522
Accrued payroll and other related expenses		2,936			1,507			583
Accrued liabilities		1,744			826			549
Other non-current liabilties		(393	)		489			(17	)
Net cash used in operating activities		(556	)		(9,055	)		(3,402	)
Cash flows from investing activities:
Proceeds from maturities of available-for-sale securities		1,000			2,000			3,074
Acquisition of property and equipment		(1,343	)		(2,070	)		(612	)
Purchase of VasCon, LLC, net of cash acquired		(2,860	)		—			—
Purchase of Neurologic UK Ltd., net of cash acquired		(1,414	)		(5,139	)		—
Payment to Biotronik AG for developed technology		(834	)		(731	)		—
Net cash (used in) provided by investing activities		(5,451	)		(5,940	)		2,462
Cash flows from financing activities:
Proceeds from (costs of) issuance of convertible preferred stock and warrants		—			(11	)		11,861
Proceeds from issuance of common stock, net of issuance costs		2,039			33,872			(844	)
Proceeds from exercise of preferred and common stock warrants		—			1,007			61
Proceeds from exercise of stock options		2,304			465			177
Proceeds from employee stock purchase plan		755			333			—
Net cash provided by financing activities		5,098			35,666			11,255
Effect of foreign exchange rate changes on cash		(659	)		416			(225	)
Net increase (decrease) in cash and cash equivalents		(909	)		20,671			10,315
Cash and cash equivalents at beginning of year		36,104			15,017			4,927
Cash and cash equivalents at end of year	$	34,536		$	36,104		$	15,017
Supplemental disclosure of cash flow information:
Interest paid	$	14		$	12		$	29
Income taxes paid — liability assumed in Neurologic UK Ltd. acquisition	$	—		$	192		$	—
Supplemental schedule of non-cash investing and financing activities:
Issuance of common stock for purchase of VasCon, LLC	$	2,972		$	—		$	—
Conversion of preferred stock to common stock in connection with IPO	$	—		$	59,227		$	—
Accretion to redemption value of redeemable convertible preferred stock including beneficial conversion feature	$	—		$	659		$	588
Reclassification of 2005 common stock warrants to equity in connection with IPO	$	—		$	3,358		$	—
Accrued earn-out payment associated with the purchase of Neurologic UK Ltd.	$	2,232		$	1,403		$	—
Accrued milestone payment associated with the Biotronik AG transaction	$	—		$	732		$	—
Accrued offering costs for issuance of common stock	$	—		$	—		$	450

The accompanying notes are an integral part of these consolidated financial statements.

61

MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1 — Formation and Business of the Company

Micrus Endovascular Corporation (the “Company”), formerly Micrus Corporation, was incorporated under the laws of the state of Delaware in June 1996. The Company develops, manufactures and markets both implantable and disposable medical devices used in the treatment of cerebral vascular diseases.

Note 2 — Summary of Significant Accounting Policies

Principles of consolidation

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

The Company’s international subsidiaries use their local currency as the functional currency. Assets and liabilities are translated at exchange rates in effect at the balance sheet date. Revenue, expense, gain and loss accounts are translated at average exchange rates during the period. Resulting translation adjustments are recorded directly to accumulated other comprehensive income (loss).

Use of estimates

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from these estimates. These estimates and assumptions include reserves and write-downs related to accounts receivable and inventories, the recoverability of long-term assets, deferred tax assets and related valuation allowances and valuation of equity instruments.

Revenue recognition and product warranty

The Company generates revenue from the sale of its microcoil product line and related equipment and accessories. Revenue is generated from sales to hospitals and third-party distributors.

Revenue is recognized when evidence of an arrangement exists, delivery to the customer has occurred, the selling price is fixed or determinable and collectibility is reasonably assured. Revenue is recognized generally upon shipment after the receipt of a replenishment or purchase order.

The evidence of an arrangement generally consists of a contract or a purchase order approved by the customer.

Delivery to the customer occurs when the customer takes title to the product. Generally title passes upon shipment, but may occur when the product is received by the customer based on the terms of the agreement with the customer.

The selling price for all sales are fixed and agreed with the customer prior to shipment and are generally based on established list prices.

The Company performs credit checks on new customers and periodic credit checks on existing customers. Accordingly, collectibility is generally assured prior to shipment. In the event a sale is made to a customer for which collectibility is not reasonably assured, the Company either requires prepayment of the order or revenue is deferred and recognized upon collection. The Company maintains a reserve for amounts which may not be collectible.

The Company maintains inventory at various hospital locations under the custody of hospital personnel for use in procedures. The Company recognizes revenue on sales to these customers when the revenue criteria have been met, which occurs when the hospital informs the Company that product has been removed from inventory and used in a procedure.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Once a sale has occurred, the customer has no right of return and the Company provides its customers with limited warranty privileges. To date, product returns under warranty have not been significant.

Sales to distributors are recognized at the time of shipment, provided that the Company has received an order, the price is fixed or determinable and collectibility is reasonably assured. Non-refundable fees received from distributors upon entering into multi-year distribution agreements, where there is no culmination of a separate earnings process, are deferred and amortized over the term of the distribution agreement or the expected period of performance, whichever is longer.

Sales made to the Company’s South American distributors are made according to the same contractual terms as sales made to other customers. However, the Company has historically experienced longer delays in receiving payments and a higher level of write-offs relating to its South American distributors and has been unable to conclude that collectibility is reasonably assured at the time that the customer takes title to the inventory on sales to this class of customers. Accordingly, for this class of customers, the Company recognizes revenue when cash is collected. Revenues recognized from these customers were $1,057,000, $839,000 and $757,000 for the years ended March 31, 2007, 2006 and 2005, respectively. The related cost of goods sold is deferred and recognized at the time the related sale is recognized.

Cost of goods sold

The Company’s cost of goods sold includes the cost of products sold to customers including materials, direct labor, depreciation, overhead costs associated with manufacturing, impairments of inventory and warranty expenses. Also, beginning with the quarter ended December 31, 2006, cost of goods sold includes amortization of capitalized license technology in connection with the Biotronik agreement and acquired intangible assets in connection with the acquisition of VasCon, LLC (“VasCon”).

Concentration of credit risk

Financial instruments, which potentially subject the Company to concentrations of credit risk, are cash and cash equivalents and accounts receivable. The Company maintains cash and cash equivalents with various major financial institutions. Deposits in these banks may exceed the amount of insurance provided on such deposits. The Company has not experienced any losses on its deposits of cash and cash equivalents.

The Company grants credit to its customers, which are primarily located in the United States, Europe, Asia Pacific and South America, and performs ongoing credit evaluations on its customers and collateral is generally not required for trade receivables. The Company maintains allowance for potential credit losses and such losses have been within the Company’s expectations.

The Company had one customer which accounted for 15% of revenues for the year ended March 31, 2007. No customer accounted for 10% of accounts receivable at March 31, 2007. For the year ended March 31, 2006, no customer accounted for 10% of the Company’s revenues. The Company had one customer which accounted for 26% of accounts receivable at March 31, 2006. The Company had one customer which accounted for 14% of revenues for the year ended March 31, 2005.

Certain significant risks and uncertainties

Certain of the Company’s products require approval from the Food and Drug Administration and foreign regulatory agencies prior to commercialized sale and are subject to continued regulations once approved. There can be no assurance that the Company’s new products or new versions of previous products will receive these required approvals. If the Company was denied such approvals or such approvals were delayed, it could have a materially adverse impact on the Company.

63

MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

A portion of the Company’s sales operations are based outside of the United States, principally in Europe, Asia Pacific and South America. As a result, the Company must comply with a wide variety of foreign laws and regulations. In particular, the Company may be materially adversely affected by changes in the political, social and economic conditions in these countries, and by changes in government policies with respect to such matters as laws and regulations, methods to address inflation, currency conversion and restrictions and rates and methods of taxation.

Certain of the components and materials used in the Company’s devices are provided by single source suppliers. The loss of any of these suppliers, or their inability to supply the Company with an adequate supply of materials could have a materially adverse impact on the Company.

Cash and cash equivalents and short-term investments

The Company considers all highly liquid investments purchased with original maturities of three months or less to be cash equivalents. Cash equivalents may be invested in money market funds. Cash equivalents are carried at cost, which approximates fair value.

Available-for-sale securities

The Company has classified its investments as “available-for-sale.” Such investments are recorded at fair market value with unrealized gains and losses on such securities reported as a separate component of stockholders’ equity (deficit). Realized gains and losses on sales of all such securities are reported in earnings and computed using the specific identification cost method. Realized gains or losses and charges for other-than-temporary declines in value, if any, on available-for-sale securities are reported in other income or expense as incurred. The Company periodically evaluates these investments for other-than-temporary impairment.

Fair value of financial instruments

Carrying amounts of certain of the Company’s financial instruments, including cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other liabilities, approximate fair value due to their short maturities. The estimated fair value for the Company’s investments in marketable securities, which are separately disclosed elsewhere, are based on quoted market prices for the same or similar instruments.

Allowance for doubtful accounts

The Company maintains an allowance for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. The Company provides an allowance for specific customer accounts where collection is doubtful and also provides an allowance for other accounts based on historical collection and write-off experience. If the financial condition of customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required.

Inventories

Inventories of raw materials, work-in-progress and finished goods are stated at the lower of cost or market, cost being determined under a standard cost method, which approximates actual cost on a first-in, first-out basis.

The Company makes inventory provisions for estimated excess and obsolete inventory based on management’s assessment of future demand and market conditions. If actual future demand or market conditions are less favorable than those projected by management, additional inventory provisions may be required.

64

MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Property and equipment

Property and equipment are stated at cost and depreciated on a straight-line basis over the estimated useful lives of the related assets, which is generally three to seven years. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the remaining lease term or the estimated useful life of the related assets. Construction in progress is not depreciated until the related asset is placed in service. Upon sale or retirement of assets, the costs and related accumulated depreciation and amortization are removed from the consolidated balance sheets and the resulting gain or loss is reflected in the statements of operations. Maintenance and repairs are expensed as incurred.

Impairment of long-lived assets

The Company reviews long-lived assets, including property and equipment and intangibles, for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable. An impairment loss is recognized when estimated undiscounted future cash flows expected to result from the use of the asset and its eventual disposition are less than its carrying amount. Impairment, if any, is measured as the amount by which the carrying amount of a long-lived asset exceeds its fair value. Through March 31, 2007, there have been no such impairments.

Goodwill and intangible assets

Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired in a business combination. Negative goodwill represents the excess fair value of the net assets acquired in a business combination over the purchase price. If the acquisition involves contingent consideration, the negative goodwill is recorded as a deferred credit (non-current liability) in the consolidated balance sheet and is reduced by the contingent consideration that is paid, with any additional contingent consideration being recorded as goodwill.

Intangible assets resulting from acquisitions are estimated by management based on the fair market value of assets received. Identifiable intangible assets are comprised of existing process and product technology, distribution agreements, non-compete agreements and customer relationships, and are carried at cost less accumulated amortization. Amortization is computed using the straight-line method over their estimated useful lives ranging from two to seven years. In accordance with Statement of Financial Accounting Standards No. 142, “Goodwill and Other Intangible Assets,” goodwill is not subject to amortization. The Company evaluates goodwill for impairment annually in the fourth quarter, or more frequently if events or changes in circumstances suggest that the carrying amounts may not be recoverable.

Intangible assets not resulting from acquisitions are comprised of patents and licensed technology, and are carried at cost less accumulated amortization. Amortization of patents is computed using the straight-line method over their estimated useful lives of ten years. Patent application, maintenance costs and costs incurred in obtaining the license rights to technology in the research phase are expensed as incurred. Amortization of licensed technology is computed using the straight-line method over its estimated useful life of seven years when the Company starts selling the product and generating revenue.

Through March 31, 2007, there have been no impairment charges related to goodwill and intangible assets.

Comprehensive loss

Comprehensive loss generally represents all changes in stockholders’ equity (deficit) except those resulting from investments or contributions by stockholders. The Company’s unrealized gains and losses on its available-for-sale securities and the foreign currency translation represent the only components of comprehensive loss excluded from reported net loss. These components of comprehensive loss are presented in the statements of stockholders’ equity (deficit).

65

MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Research and development

Research and development costs are charged to operations as incurred and consist primarily of costs associated with evaluating in-process technology, purchases of intellectual property, personnel costs and supplies.

Advertising costs

Advertising costs are expensed as incurred and included in sales and marketing expenses.

Shipping and handling of products

Amounts billed to customers for shipping and handling of products are included in revenues. Costs incurred related to shipping and handling of products are included in cost of goods sold.

Foreign currency transactions

Other income includes foreign currency gains or losses related to a loan with the Company’s Swiss subsidiary, and currency gains or losses resulting from differences in exchange rates between the time of recording of the transaction and the cash settlement of foreign currency denominated receivables and payables. The Company recorded currency gains (losses) for the years ended March 31, 2007, 2006 and 2005 of $667,000, ($444,000) and $223,000, respectively.

Income taxes

The Company accounts for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to effect taxable income. Valuation allowances are established when necessary to reduce deferred tax assets to the amounts expected to be realized.

Net loss per share

Basic net loss per share is computed by dividing net loss attributable to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per share is computed by giving effect to all potential dilutive common shares, including stock options, restricted stock units, warrants and redeemable convertible preferred shares. There is no difference between basic and diluted net loss per share for all periods presented due to the Company’s net losses.

66

MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Anti-dilutive securities

The following outstanding stock options, restricted stock units, redeemable convertible preferred shares and warrants were excluded from the computation of diluted net loss per common share for the periods presented because their impact would have been anti-dilutive (in thousands):

	Years Ended March 31,
	2007		2006		2005
Redeemable convertible preferred stock (as if converted)		—		—		7,901
Shares issuable upon exercise of common stock options		3,182		2,804		2,447
Shares issuable upon settlement of restricted stock units		10		—		—
Warrants to purchase common stock		—		—		834
Warrants to purchase redeemable convertible preferred stock (as if converted)		—		—		405
		3,192		2,804		11,587

Stock-based compensation

The Company has adopted various stock plans that provide for the grant of stock awards to employees, non-employee directors and consultants. The Company also has an employee stock purchase plan which enables employees to purchase the Company’s common stock.

On April 1, 2006, the Company adopted the provisions of, and accounts for stock-based compensation in accordance with, the Financial Accounting Standards Board’s (“FASB”) Statement of Financial Accounting Standards No. 123 — revised 2004 (“SFAS 123R”), “Share-Based Payment” which replaced Statement of Financial Accounting Standards No. 123 (“SFAS 123”), “Accounting for Stock-Based Compensation” and supersedes APB Opinion No. 25 (“APB 25”), “Accounting for Stock Issued to Employees.” Under the fair value recognition provisions of SFAS 123R, stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense on a straight-line basis over the requisite service period, which is generally the vesting period. The Company elected the modified-prospective method, under which prior periods are not revised for comparative purposes. The valuation provisions of SFAS 123R apply to new grants and to grants that were outstanding prior to the effective date and are subsequently modified. Estimated compensation for grants that were outstanding as of the effective date will be recognized over the remaining service period using the compensation cost estimated for the SFAS 123 pro forma disclosures, excluding pre-IPO options for which the fair value was determined using the minimum value method. For these grants, any remaining unamortized deferred compensation expenses will continue to be accounted for under the intrinsic value method of APB 25.

Due to the adoption of SFAS 123R, some exercises result in tax deductions in excess of previously recorded benefits based on the option value at the time of grant, or windfalls. The Company recognizes windfall tax benefits associated with the exercise of stock options directly to stockholders’ equity only when realized. Accordingly, deferred tax assets are not recognized for net operating loss carryforwards resulting from windfall tax benefits occurring from April 1, 2006 onward. A windfall tax benefit occurs when the actual tax benefit realized by the company upon an employee’s disposition of a share-based award exceeds the deferred tax asset, if any, associated with the award that the company had recorded. When assessing whether a tax benefit relating to share-based compensation has been realized, the Company has elected to follow the tax law ordering method, under which current year share-based compensation deductions are assumed to be utilized before net operating loss carryforwards and other tax attributes. Also, the Company has elected to ignore the indirect tax effects of share-based compensation deductions in computing its research and development tax credit. the Company will recognize the full effect of these deductions in the statements of operations when the valuation allowance is released.

67

MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The adoption of SFAS 123R had and will have a material impact on the Company’s consolidated financial position and results of operations. See Note 9 for further information regarding stock-based compensation assumptions and expenses, including pro forma disclosures for prior periods as if stock-based compensation expense had been recorded.

Recent accounting pronouncements

In July 2006, FASB issued Financial Accounting Standards Interpretation No. 48 (“FIN 48”), “Accounting for Uncertainty in Income Taxes — an interpretation of FASB Statement No. 109.” FIN 48 prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a company’s income tax return, and also provides guidance on derecognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. FIN 48 utilizes a two-step approach for evaluating tax positions. Step one, Recognition, occurs when a company concludes that a tax position is more likely than not to be sustained upon examination. Step two, Measurement, is based on the largest amount of benefit, which is more likely than not to be realized on ultimate settlement. FIN 48 is effective for fiscal years beginning after December 15, 2006, with the cumulative effect of the change in accounting principle to be recorded as an adjustment to the beginning balance of retained earnings and therefore are effective for the Company in the first quarter of fiscal 2008. The Company is currently in the process of evaluating the effects of adopting FIN 48 and the impact of adoption on its consolidated financial position, results of operations or cash flows.

In September 2006, the FASB issued Statement of Financial Accounting Standards (’SFAS”) 157, “Fair Value Measurements.” SFAS 157 defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosures about fair value measurements. SFAS 157 applies to other accounting pronouncements that require or permit fair value measurements, the FASB having previously concluded in those accounting pronouncements that fair value is the relevant measurement attribute. Accordingly, this Statement does not require any new fair value measurements. However, for some entities, the application of SFAS 157 will change current practice. The provisions of SFAS 157 are effective as of the beginning of the Company’s 2009 fiscal year. The Company is currently evaluating the impact of SFAS 157, but do not expect the adoption of SFAS 157 to have a material impact on its consolidated financial position, results of operations or cash flows.

In February 2007, the FASB issued SFAS 159, “The Fair Value Option for Financial Assets and Financial Liabilities,” which expands opportunities to use fair value measurements in financial reporting and permits entities to choose to measure many financial instruments and certain other items at fair value. SFAS 159 is effective for fiscal years beginning after November 15, 2007. The Company is currently evaluating SFAS 159 to determine its impact on its consolidated financial position, results of operations or cash flows.

Note 3 — Business Combination and Technology Agreements

Fiscal 2007 Business Combination

VasCon

On November 30, 2006, the Company completed the acquisition of VasCon, a privately held company engaged in the development and manufacture of vascular access and delivery devices. The acquisition of VasCon adds expertise in developing clinically advanced access and catheter systems to the Company’s core competencies and provides the Company with manufacturing capabilities that are expected to lead to cost reductions for a wide range of the Company’s products. VasCon’s existing cardio and peripheral vascular products will continue to be sold through non-Micrus distribution channels. Micrus Design Technology, Inc., a newly formed subsidiary of the Company, will develop and manufacture neurovascular access and delivery products for the Company, including the Company’s steerable catheter.

68

MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The transaction included an up-front payment and additional contingent earn-out payments as described below. The total consideration paid of approximately $5,876,000 as of March 31, 2007, consisted of the up-front payment of approximately $2,500,000 in cash, the issuance of 156,666 shares of the Company’s common stock having an aggregate value of approximately $2,972,000 calculated based on the average closing price two days before and the day of the acquisition and $404,000 in acquisition-related closing costs. Additionally, VasCon may receive certain earn-out payments in an amount not to exceed $10,000,000 based on sales and manufacturing performance as set forth in the asset purchase agreement entered into by the parties. The common stock portion of the up-front payment was placed in escrow to satisfy certain indemnification obligations of VasCon and its members as described in such asset purchase agreement.

The consideration paid was comprised of (in thousands):

Initial cash payment	$	2,500
Issuance of shares of common stock		2,972
Acquistion-related closing costs		404
Total purchase price	$	5,876

The results of operations of Micrus Design Technology are included in the accompanying consolidated statements of operations for all periods or partial periods subsequent to the acquisition date. The purchase price was allocated to the net tangible and identifiable intangible assets acquired and the liabilities assumed based on their estimated fair values at the date of acquisition as determined by management. As of March 31, 2007, the fair value of the net assets acquired exceeded the purchase consideration resulting in negative goodwill in the amount of $1,596,000. Because the acquisition involves contingent consideration, the negative goodwill has been recorded as a deferred credit (non-current liability) in the consolidated balance sheet and will be reduced by the contingent consideration of up to $10,000,000 that will be paid over the next three years, with any additional contingent consideration being recorded as goodwill. The consideration paid was allocated as follows (in thousands):

Inventories	$	592
Fixed assets		1,654
Other acquired net assets		76
Intangible assets		5,150
Contingent purchase price		(1,596	)
Total purchase price	$	5,876

The Company acquired certain intangible assets in the amount of $5,150,000 in connection with the acquisition of VasCon. These intangible assets are comprised of existing process technology of $4,590,000, existing product technology of $260,000 and patents of $300,000. The Company determined the valuation of the identifiable intangible assets acquired in the transaction using future revenue assumptions and a valuation analysis. The amounts allocated to the identifiable intangible assets were determined through established valuation techniques accepted in the technology industry. These purchased intangible assets are being amortized on a straight-line basis over a weighted-average period of approximately seven years.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The following table presents unaudited pro forma financial information for the combined entity of Micrus Endovascular and VasCon for the year ended March 31, 2007 and 2006, as if the acquisition had occurred at the beginning of each of the periods presented after giving effect to certain pro forma adjustments (in thousands except for per share data):

	Years Ended March 31,
	2007			2006
Revenues	$	59,587		$	37,032
Net loss attributable to common stockholders	$	(7,220	)	$	(9,751	)
Net loss per share attributable to common stockholders — basic and diluted	$	(0.49	)	$	(0.86	)

Fiscal 2006 Business Combination

Neurologic

On September 20, 2005, the Company entered into a Share Purchase Agreement (“Purchase Agreement”) acquiring all of the outstanding capital stock of Neurologic UK Limited (“Neurologic”), a privately held distributor of the Company’s products in the United Kingdom (“UK”). Neurologic accounted for approximately 14% of the Company’s revenues during the fiscal year ended March 31, 2005. The acquisition of Neurologic, which was the Company’s largest distributor, has provided the Company with additional leverage and a strengthened presence in the UK market and the Company has used this acquisition as a platform to expand sales to existing accounts and support sales to customers using alternative procedures and competing products.

The transaction included an initial cash payment of approximately $4,709,000 in addition to future multi-year revenue based earn-out payments. All three earn-out payments shall be one-third of Neurologic’s product sales during specified periods. At March 31, 2007 and 2006, the Company has accrued for the additional consideration of approximately $2,232,000 and $1,403,000 for the first and second year earn-out payments, respectively, which has been added to goodwill (See Note 4). The Company paid the first and second year earn-outs in April 2006 and April 2007, respectively. In November 2005, the Company paid additional consideration of approximately $120,000 as a purchase price adjustment pursuant to the provisions of the Purchase Agreement.

As a result of the purchase of Neurologic, the Company established a new wholly owned subsidiary in the UK and changed the name from Neurologic to Micrus Endovascular UK Limited (“Micrus UK”). The Company concurrently entered into long term Services Agreements with each of the two founders of Neurologic to provide for their employment by Micrus UK.

In addition, pursuant to the Purchase Agreement, the two founders of Neurologic agreed to a non-competition provision to last for a period of six years, under which they may not actively carry on any business that would compete with Neurologic’s business within the UK or Ireland. Similarly, they agreed not to solicit former clients, customers or suppliers of Neurologic for a period of three years.

The results of operations of Neurologic are included in the accompanying consolidated statements of operations for all periods or partial periods subsequent to the acquisition date.

The total consideration paid of approximately $9,402,000 consisted of the cash payments and accrued second year earn-out payment totaling $8,475,000, the assumed forgiveness of receivables from Neurologic to Micrus Endovascular SA at the acquisition date of $611,000, and direct acquisition related costs of $316,000.

The net tangible assets acquired and liabilities assumed in the acquisition were recorded at fair value. The Company determined the valuation of the identifiable intangible assets acquired in the transaction to be $3,900,000 using future revenue assumptions and a valuation analysis. The amounts allocated to the identifiable intangible assets were determined through established valuation techniques accepted in the technology industry. The Company has recorded goodwill of $5,552,000 associated with the purchase of Neurologic.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The goodwill has been allocated to the Company’s Europe business segment.

The consideration paid for Neurologic was comprised of (in thousands):

Total cash payments and accrued second year earn-out payment	$	8,475
Forgiven intercompany payables		611
Direct acquisition related costs		316
Total consideration	$	9,402

The purchase price of Neurologic was allocated as follows (in thousands):

Acquired net assets	$	664
Deferred tax liability		(714	)
Goodwill		5,552
Other intangible assets consisting of:
Customer relationships		900
Distribution agreements		2,300
Non-compete agreements		700
Total purchase price	$	9,402

Any future earn-out payments will be added to goodwill.

The Company has recorded a deferred tax liability for the tax effect of the amortizable intangible assets which are not deductible for tax purposes.

The following table summarizes the estimated fair values of the assets acquired and liabilities assumed at the date of acquisition (in thousands):

Cash	$	6
Accounts receivable		760
Inventories		690
Prepaid expenses and other current assets		143
Total current assets acquired		1,599
Accounts payable		(612	)
Accrued and other liabilities		(323	)
Total current liabilities assumed		(935	)
Net assets acquired	$	664

The following table presents unaudited pro forma financial information for the combined entity of Micrus Endovascular and Neurologic for the years ended March 31, 2006 and 2005, as if the acquisition had occurred at the beginning of each of the periods presented after giving effect to certain purchase accounting adjustments (in thousands, except per share amounts):

	Years Ended March 31,
	2006			2005
Revenues	$	33,560		$	25,356
Net loss attributable to common stockholders	$	(9,220	)	$	(7,706	)
Net loss per share attributable to common stockholders — basic and diluted	$	(0.82	)	$	(5.52	)

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Technology Agreements

Vascular FX

On July 28, 2005, the Company entered into a Technology Transfer Agreement with Vascular FX, a Delaware limited liability company, pursuant to which the Company purchased the intellectual property (“IP”) of Vascular FX. The $4,000,000 cash purchase price included a $1,500,000 payment at closing followed by milestone payments to be made over time, in addition to royalty payments on potential future product sales. On January 31 and May 31, 2006, the Company made milestone payments of $1,000,000 and $1,500,000, respectively. The Company has recorded the initial and milestone payments in the corresponding accounting periods as research and development expense since there are currently no FDA approved products being sold and the intellectual property has no alternative future use. There are no future milestone payments to Vascular FX under the terms of the agreement.

Biotronik AG

On January 6, 2006, the Company entered into a License, Development and Distribution Agreement (the “Biotronik Agreement”) with Biotronik AG, a Swiss corporation (“Biotronik”), pursuant to which the Company will collaborate with Biotronik to develop certain neurovascular products and the Company will be the exclusive worldwide distributor for neurovascular products. Pursuant to the terms of the agreement, Biotronik granted to the Company an exclusive license to certain patents, know-how and other proprietary technology in the neurovascular field. The Biotronik Agreement has a term that is perpetual unless earlier terminated by the parties or by operation of law.

Under the terms of the Biotronik Agreement, the Company paid an upfront licensing fee of €500,000, or approximately $610,000, and was required to make milestone payments to Biotronik upon receipt of approvals to market stent products jointly developed for the treatment of neurovascular disease and royalty payments on the products sold. The Company has recorded the upfront licensing fee as research and development expense in the fiscal year ended March 31, 2006 as there were no regulatory clearances for a product at that time. In February 2006, Biotronik met the established milestones of the agreement when it received CE Mark clearance for the Pharos product intended for both the treatment of aneurysms and the treatment of ischemic diseases. As a consequence the Company paid milestone payments to Biotronik of $731,000 and $732,000 in March and April 2006, respectively. The Company recorded the milestone payments of $1,463,000 as capitalized licensed technology at March 31, 2006. Under the terms of this agreement, there are no future milestone payments to Biotronik related to the Pharos stent. The Company capitalized additional costs associated with the Pharos stent development of $102,000 in the first quarter of fiscal 2007. The Company commenced amortization of the capitalized licensed technology in the third quarter of fiscal 2007 when it began selling the Pharos product and generating revenue. This capitalized licensed technology will be amortized over the estimated useful life of seven years. Additionally, the Company has accrued royalty payments of approximately $34,000 to Biotronik for the products sold in fiscal 2007.

Note 4 — Balance Sheet Components

Available-for-sale securities

Available-for-sale securities are summarized as follows (in thousands):

	March 31,
	2006
Government Securities:
Fair market value	$	984
Amortized cost basis		995
Unrealized gain (loss)	$	(11	)

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

As of March 31, 2007, the Company did not have any short-term investments.

Inventories

Inventories consisted of the following (in thousands):

	March 31,
	2007		2006
Raw materials	$	1,862	$	507
Work-in-progress		1,413		462
Finished goods		3,005		1,197
Consigned inventory		2,622		2,082
Inventory held by Latin American distributors		147		231
	$	9,049	$	4,479

Consigned inventory is held at customer locations, primarily hospitals, and is under the physical control of the customer. The Company retains title to the inventory until used and purchased by the customer, generally when used in a medical procedure.

Property and equipment

Property and equipment consisted of the following (in thousands):

	March 31,
	2007			2006
Computer equipment and software	$	1,210		$	1,093
Furniture, fixtures and equipment		4,701			2,419
Leasehold improvements		936			1,040
Construction in progress		148			—
Total cost		6,995			4,552
Less accumulated depreciation and amortization		(2,347	)		(2,064	)
	$	4,648		$	2,488

Depreciation and amortization expense related to property and equipment was $857,000, $491,000 and $395,000 for the years ended March 31, 2007, 2006 and 2005, respectively.

Goodwill

Activity related to goodwill consisted of the following (in thousands):

	Years Ended March 31,
	2007		2006
Balance beginning of year	$	3,309	$	—
Addition related to acquisition of Neurologic		—		3,309
Addition related to Neurologic earn-out payment		2,243		—
Balance end of year	$	5,552	$	3,309

The Company recorded goodwill only in the Europe business segment.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Intangible assets

Intangible assets consisted of the following (in thousands):

	Useful		Gross Carrying Amount						Accumulated Amortization									Net
	Life		March 31,				March 31,		March 31,						March 31,			March 31,		March 31,
	(Years)		2006		Additions		2007		2006			Additions			2007			2007		2006
Existing process technology		7	$	—	$	4,590	$	4,590	$	—		$	(219	)	$	(219	)	$	4,371	$	—
Distribution agreements		5		2,300		—		2,300		(234	)		(470	)		(704	)		1,596		2,066
Capitalized license fee		7		1,463		102		1,565		—			(112	)		(112	)		1,453		1,463
Patents — microcoil		10		1,100		—		1,100		(660	)		(110	)		(770	)		330		440
Non-compete agreements		6		700		—		700		(60	)		(117	)		(177	)		523		640
Customer relationships		5		900		—		900		(92	)		(182	)		(274	)		626		808
Patents — catheter		7		—		300		300		—			(14	)		(14	)		286		—
Existing product technology		2		—		260		260		—			(40	)		(40	)		220		—
			$	6,463	$	5,252	$	11,715	$	(1,046	)	$	(1,264	)	$	(2,310	)	$	9,405	$	5,417

Amortization of intangible assets included in the results of operations is as follows (in thousands):

	Years Ended March 31,
	2007		2006		2005
Cost of goods sold	$	385	$	—	$	—
Operating expenses		879		496		110
Total	$	1,264	$	496	$	110

The amortization expense of the intangible assets related to existing technology in the manufacturing process and design of products resulting from the acquisition of VasCon in the amount of $273,000 is included in cost of goods sold for fiscal 2007.

The Company started generating revenue from the stent product associated with the capitalized license technology in the third quarter of fiscal 2007. The amortization expense related to the capitalized license technology in the amount of $112,000 is included in cost of goods sold for fiscal 2007.

The expected future amortization of intangible assets is as follows (in thousands):

For Years Ended March 31,	Amortization
2008	$	1,908
2009		1,870
2010		1,793
2011		1,345
2012		982
Thereafter		1,507
Total	$	9,405

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Accruals

Accrued payroll and other related expenses consisted of the following (in thousands):

	March 31,
	2007		2006
Accrued bonuses	$	2,646	$	1,157
Accrued salaries		702		478
Accrued vacation		1,333		804
Accrued commissions		725		392
Accrued payroll taxes		739		316
	$	6,145	$	3,147

Accrued liabilities consisted of the following (in thousands):

	March 31,
	2007		2006
Earn-out payment in connection with Neurologic acquistion	$	2,232	$	1,403
Professional fees		1,069		709
Development costs		559		28
VAT payable		438		78
Marketing related programs		254		144
Biotronik milestone payment		—		732
Deferred revenue from Japan distribution agreement		150		150
Other		1,586		1,064
	$	6,288	$	4,308

Other non-current liabilities

Other non-current liabilities consisted of the following (in thousands):

	March 31,
	2007		2006
Contingent purchase price (Note 3)	$	1,596	$	—
Deferred tax liability		570		641
Deferred revenue from Japan distribution agreement		375		525
Other non-current liabilities		169		89
	$	2,710	$	1,255

On September 30, 2005, the Company entered into a five-year, exclusive Distribution Agreement with Goodman, CO., LTD (“Goodman”). Under the terms of the Distribution Agreement, Goodman will promote and market the Company’s full line of products, as such products are approved, in Japan and will purchase a minimum of $27,250,000 of such products over the five year term of the agreement, ranging from $2,000,000 during the fiscal year ended March 31, 2006 to $9,000,000 during the fiscal year ending March 31, 2010. In connection with the Distribution Agreement, Goodman paid the Company an up-front cash payment of $750,000 which has been recorded as deferred revenue. The Company is recognizing the deferred revenue on a straight-line basis over the five year term of the agreement.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Accumulated Other Comprehensive Income (Loss)

Accumulated other comprehensive loss consisted of the following (in thousands):

	March 31,
	2007			2006
Translation Adjustment	$	(512	)	$	(229	)
Unrealized gain (loss) on available-for-sale securities		—			(11	)
	$	(512	)	$	(240	)

Note 5 — Income Taxes

As of March 31, 2007, the Company had federal, state and foreign net operating loss carryforwards (“NOLs”) of approximately $36,000,000, $21,500,000 and $900,000, respectively. The federal NOLs will expire at various dates beginning in 2012, the state NOLs expire beginning in 2008 and the foreign NOLs will expire beginning in 2013.

The Company also had federal and state research and development tax credit carryforwards of approximately $1,000,000 and $900,000, respectively, as of March 31, 2007. The federal credits will expire beginning in 2012 and the state credits can be carried forward indefinitely.

The Tax Reform Act of 1986 limits the use of net operating loss and tax credit carryforwards in the case of an “ownership change” of a corporation. An ownership change, as defined, may restrict utilization of tax attribute carryforwards. The Company experienced an ownership change, as defined in Section 382 of the Internal Revenue Code, in May 2002, but the previously limited net operating loss and tax credit carryovers have now become available to offset taxable income in future periods. The Company has not determined if an ownership change has occurred in the period subsequent to the May 2002 ownership change. If a second ownership change has occurred, all net operating loss carryovers and all tax credit carryovers arising prior to the ownership change would be subject to limitation in the post change period for US tax purposes.

Tax filings are based on tax laws which are subject to significant and varied interpretation. It is often unclear whether a particular position taken in a tax return will ultimately be sustained. The Company has reviewed its filing positions and believes it has adequately accrued for such uncertainties.

The related benefit from income taxes consisted of the following:

	Years Ended March 31,
	2007			2006			2005
Current
Federal	$	—		$	—		$	—
State		—			—			—
Foreign		(63	)		(11	)		—
Total current income tax benefit		(63	)		(11	)		—
Deferred
Federal		—			—			—
State		—			—			—
Foreign		(184	)		(73	)		—
Total deferred income tax benefit		(184	)		(73	)		—
Total income tax benefit	$	(247	)	$	(84	)	$	—

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The Company has incurred net operating losses for both federal and state purposes since inception and, as a result, the Company has paid no federal or state income taxes. In fiscal 2007, the Company has a current tax benefit of approximately $63,000 arising from losses in the UK and a deferred tax benefit of approximately $184,000 primarily attributable to the tax effect of the current year amortization related to the intangible assets acquired in the Neurologic transaction which are not deductible for tax purposes.

Net deferred tax assets (liabilities) consisted of the following (in thousands):

	March 31,
	2007			2006
Deferred tax assets:
Net operating loss carryforwards	$	11,511		$	11,992
Basis difference in fixed assets		2,117			326
Accruals deductible in different periods		2,529			2,324
Credit carryforwards		1,620			1,436
Total deferred tax assets		17,777			16,078
Less valuation allowance		(17,750	)		(16,078	)
Net deferred tax asset		27			—
Deferred tax liabilities:
Basis difference in fixed and intangible assets		570			641
Total deferred tax liabilities		(570	)		(641	)
Net deferred tax liability	$	(543	)	$	(641	)

The Company has recorded a valuation allowance against its federal and state deferred tax assets as of March 31, 2007 and a full valuation allowance against its deferred tax assets as of March 31, 2006, due to the uncertainty surrounding the realization of such assets. Management evaluates on a periodic basis the recoverability of deferred tax assets. At such time as it is determined that it is more likely than not that deferred tax assets are realizable, the valuation allowance will be reduced.

In March 2007, the Company reassessed the valuation allowance previously recorded against its net deferred tax asset for its Swiss subsidiary, which consisted primarily of net operating loss carryforwards. Based on the Subsidiary’s earnings history and projected future taxable income, the Company determined that it is more likely than not that this deferred tax asset will be realized. Accordingly, the Company released the valuation allowance previously recorded against the Swiss subsidiary’s deferred tax asset. The valuation allowance related to Swiss subsidiary decreased by $264,000 in fiscal 2007.

The effective tax rate differs from the U.S. federal statutory rate as a result of the following:

	Years Ended March 31,
	2007			2006			2005
Income tax benefit at statutory rate		(35	)%		(35	)%		(35	)%
State taxes, net of federal benefit		(4	)%		(3	)%		(6	)%
Non-US income taxed at different rates		(14	)%		11	%		—
Change in valuation allowance		40	%		23	%		26	%
Nondeductible deferred compensation		12	%		1	%		15	%
Other		(3	)%		2	%		0	%
Effective income tax rate		(4	)%		(1	)%		0	%

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The domestic and foreign components of loss before income taxes were as follows:

	Years Ended March 31,
	2007			2006			2005
Domestic	$	(7,168	)	$	(5,709	)	$	(9,083	)
Foreign		1,438			(2,636	)		2,379
Loss before income taxes	$	(5,730	)	$	(8,345	)	$	(6,704	)

Note 6 — Commitments and Contingencies

Lease commitments

On June 6, 2005, the Company entered into a non-cancelable 7-year operating lease agreement (the “Lease”). Pursuant to the Lease, the Company has leased approximately 42,000 square feet of building space which is being used as the Company’s headquarters in the United States with both administrative and manufacturing facilities. The Lease commenced in January 2006. The lease provides a right to extend the term for one period of sixty months that may be exercised by the Company.

The Lease provides for a base rent that increases periodically and averages approximately $41,445 monthly over the lease period and is accounted for on a straight-line basis. The Lease also provides for certain additional payments including the Company’s share of landlord’s operating expenses, including project costs, property taxes and overhead management fees.

Additionally, the Company leases office space for its three wholly-owned subsidiaries, Micrus SA, Micrus UK and Micrus Design Technology, under non-cancelable operating lease agreements with terms through March 2011, December 2010 and February 2008, respectively. The combined rent expense for the three operating leases is approximately $171,000 annually. The leases also provide for certain additional payments including the Company’s share of the landlord’s operating expenses.

Future minimum lease payments are as follows (in thousands):

	Minimum
For Years Ended March 31,	Lease Payments
2008	$	738
2009		654
2010		626
2011		591
2012		497
2013		415
Total minimum lease payments	$	3,521

Rent expense for the years ended March 31, 2007, 2006 and 2005 was $653,000, $519,000 and $536,000, respectively.

Indemnification

In the normal course of business, the Company enters into contracts and agreements that contain a variety of representations and warranties and provide for general indemnification. The Company’s exposure under these agreements is unknown because it involves claims that may be made against the Company in the future, but have not yet been made. To date, the Company has not paid any claims or been required to defend any action related to its indemnification obligations, and accordingly, the Company has not accrued any amounts for such indemnification

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MICRUS ENDOVASCULAR CORPORATION

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obligations. However, the Company may record charges in the future as a result of these indemnification obligations.

Litigation

The Company is from time to time subject to various lawsuits. The Company does not believe that it is probable that resolution of pending litigation will have a material adverse effect on the Company’s consolidated financial statements, however the outcome of litigation is inherently uncertain.

FCPA Investigation

In August 2004, the Company identified certain payments made to physicians located in France, Germany, Spain and Turkey that are also likely to have violated the FCPA and the laws of such countries as well as possibly the laws of Switzerland, where the Company’s Swiss subsidiary is located. The Company’s audit committee immediately directed internal legal counsel to conduct an internal investigation into these payments. In September 2004, the Company voluntarily disclosed to the United States Department of Justice (“DOJ”) the factual information obtained in the Company’s internal investigation of potential violations of the FCPA. In February 2005, the DOJ and the Company entered into an agreement pursuant to which the DOJ agreed not to prosecute the Company for conduct disclosed to the DOJ, provided that the Company accepted responsibility for the actions of its employees and officers, paid a monetary penalty of $450,000, continues to cooperate with the DOJ in its investigation, including the waiver of legal privileges, establishes policies and procedures to assure compliance with the FCPA and other relevant bribery laws, retains and pays for an independent monitor, which shall report to the DOJ for a period of three years to assure compliance with the agreement with the DOJ and the Company’s implementation and adherence to FCPA compliance policies and procedures, and cooperates fully with the DOJ, the independent monitor and the Securities and Exchange Commission (“SEC”). The Company must remain in compliance with these conditions for a period of two years following February 28, 2005 or face the filing of a criminal complaint by the DOJ. The monetary penalty was accrued in fiscal 2005 and was paid in April 2005. The ongoing cost of compliance with the DOJ agreement will be recorded as an expense as incurred.

The payments made to physicians in France, Germany, Spain and Turkey also may likely have violated the applicable laws in those foreign jurisdictions and may possibly have violated laws in Switzerland, where the Company’s Swiss subsidiary is located. The Company is not able to determine at this time what penalties or other sanctions, if any, authorities in France, Germany, Spain, or Turkey may impose as a result of such violations. Such amounts could be material to the financial position, results of operations or cash flows of the Company. The Company has been notified by the Swiss Federal Prosecutor that it does not intend to bring any action or impose any penalties on the Company relating to its activities in Switzerland.

Patent Litigation

In September 2004, Boston Scientific Corporation and Target Therapeutics, Inc., a subsidiary of Boston Scientific Corporation, (collectively “Boston Scientific”), filed a patent infringement suit in the United States District Court for the Northern District of California, alleging that the Company’s embolic coil products infringe two patents held by Boston Scientific and that this infringement is willful. Sales of the Company’s embolic coil products currently represent virtually all of the Company’s revenues. Boston Scientific is a large, publicly-traded corporation with significantly greater financial resources than the Company. In November 2004, the Company answered Boston Scientific’s complaint and counterclaimed, alleging that Boston Scientific’s embolic coil products, and their use, infringe three of the Company’s patents. In November 2006, the Company withdrew one of its three asserted patents from the litigation to pursue a reissue application filed with the United States Trademark and Patent Office (“USPTO”). Each party seeks an injunction preventing the making, using, selling, offering to sell, importing into the U.S. or exporting from the U.S., of the other’s embolic coil products in the United States, damages for past infringement, which may be trebled, and payment of its legal fees and costs. In addition,

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each party seeks a declaration that the patents of the other are invalid and not infringed and has alleged that certain of the asserted patents of the other are unenforceable due to inequitable conduct.

Boston Scientific is also a party in two other lawsuits against Cordis and ev3/Micro Therapeutics, Inc. in which the Boston Scientific patents, which are the basis of Boston Scientific’s suit against the Company, are also at issue. An outcome of either of these lawsuits adverse to Cordis or ev3/Micro Therapeutics, Inc., and related to the same patent claims Boston Scientific asserts against the Company, could have an adverse impact on certain of the Company defenses in its litigation with Boston Scientific.

In October 2004, Cordis requested ex parte reexamination of certain claims in those patents. In February 2005, the court granted a stay of the Boston Scientific lawsuit against the Company until the earlier of 12 months or the outcome of the reexamination by the U.S. Patent and Trademark Office (“USPTO”) in the Cordis case. In February 2006, the USPTO issued a Notice of Intent to Issue Ex Parte Reexamination Certificate for one of the two patents, apparently confirming all of the claims of that patent. In February 2006, the USPTO also issued an Office Action in which it apparently confirmed the patentability of certain of the claims in the second patent, but rejected the remainder. Boston Scientific has stated to the USPTO and to the court that the rejected claims from the second patent can be reissued and certified as patentable upon reexamination if a correction is made to the priority chain for the second patent.

In March 2006, the court lifted the stay with respect to any claims that were confirmed as patentable in the reexamination proceedings and has permitted discovery in the case to commence with respect to those claims. The Company subsequently negotiated with Boston Scientific, and the Court confirmed, a schedule that would permit discovery and claim construction proceedings to proceed for the second patent while it is still undergoing reexamination and reissue proceedings. Since the stay was lifted, the Company and Boston Scientific have exchanged preliminary infringement and invalidity contentions, expert reports, claim construction briefs, and have deposed each other’s expert witnesses concerning each of the four patents-in-suit. Discovery is ongoing in the case. A hearing on claim construction was held on June 1, 2007. The Court has not calendared any other dates.

The Company is unable at this time to determine the outcome of any such litigation. If the litigation is protracted or results in an unfavorable outcome to the Company, the impact to the financial position, results of operations or cash flows of the Company could be material.

Note 7 — Preferred Stock

The Company’s Certificate of Incorporation, as amended, authorizes the Company to issue 1,000,000 shares of $0.01 par value preferred stock. As of March 31, 2007, there are no shares of preferred stock issued or outstanding.

Conversion

Upon closing of the Company’s IPO, all outstanding shares of redeemable convertible preferred stock automatically converted into 7,919,626 shares of common stock.

Redemption

The Company’s preferred stock that was outstanding prior to the IPO was redeemable at the request of the holder on or after the sixth anniversary of the original issuance dates based upon certain circumstances. Prior to the closing of the IPO, the Company was accreting the carrying value of the preferred stock from the issuance date to the mandatory redemption amount on the sixth anniversary using the effective interest method through periodic charges to additional paid-in capital and accumulated deficit.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Preferred Stock Warrants

In conjunction with its Series D and D-1 preferred stock financing in August 2000, the Company issued warrants to Series D and Series D-1 stockholders to purchase shares of Series D redeemable convertible preferred stock (the “Series D preferred stock warrants”). The total proceeds of the issuance of the preferred stock in the financing was allocated between the relative fair value of the preferred stock and the warrants, resulting in a discount to the preferred stock which, prior to the closing of the IPO, was being accreted to its face amount through periodic charges against additional paid-in capital and accumulated deficit through the redemption date.

Between April 1, 2005 and the closing of the Company’s IPO, the holders of warrants to purchase 397,068 shares of Series D preferred stock exercised their warrants. Of these warrants, the holders of warrants to purchase 365,196 shares elected to net exercise their warrants which resulted in the issuance of 115,700 shares and no proceeds to the Company from the exercise of these warrants. Holders of warrants to purchase 31,872 shares of Series D preferred stock exercised their warrants providing proceeds to the Company of approximately $239,000.

The warrants to purchase 7,753 shares of Series D preferred stock that were not exercised prior to the closing of the IPO expired.

Note 8 — Common Stock

The Company’s Certificate of Incorporation, as amended, authorizes the Company to issue 50,000,000 shares of $0.01 par value common stock. Each holder of common stock has the right to one vote and is also entitled to receive dividends whenever funds are legally available and when declared by the Board of Directors, subject to the prior rights of holders of all classes of stock outstanding having priority rights as to dividends. No dividends have been declared or paid as of March 31, 2007.

On June 10, 2005, the Company effected a one-for-2.25 reverse stock split of its preferred and common shares. All preferred and common share data presented herein have been restated to retroactively reflect the reverse stock split.

On June 21, 2005, the Company completed an IPO in which it sold 3,250,000 shares of common stock at $11.00 per share providing net cash proceeds to the Company of approximately $33,248,000, net of underwriting discounts and commissions. Upon the closing of the IPO, all of the Company’s outstanding shares of redeemable convertible preferred stock automatically converted into 7,919,626 shares of common stock. On July 6, 2005, the underwriters purchased an additional 250,000 shares of common stock at $11.00 per share pursuant to their over-allotment option. Together with the over-allotment shares sold by the Company, cash proceeds to the Company in the offering were approximately $33,030,000, net of underwriting discounts and offering expenses.

On July 19, 2006, the Company completed a secondary public offering in which certain stockholders sold 1,270,211 shares of common stock at the public offering price of $11.89 per share. On July 19, 2006, the underwriters purchased 190,531 shares of common stock from the Company pursuant to the exercise of their over-allotment option. The Company did not receive any proceeds from the sale of common stock by the selling stockholders. The total cash proceeds from the exercise of the over-allotment option were approximately $2,041,000, net of the underwriting discount and offering expenses. Common stock offering expenses of $600,000 were incurred by the Company on behalf of the selling stockholders and were expensed to general and administrative expense in the second quarter of fiscal 2007.

2000 Common Stock Warrants

In December 2000, the Company entered into a warrant agreement with the Series D redeemable convertible preferred stock financing placement agent. The Company issued warrants to purchase 167,618 shares of common stock at an exercise price of $8.64 per share. These warrants expired in December 2005.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

2003 Common Stock Warrants

In conjunction with the Series D-3 preferred stock financing in June 2003, the Company issued warrants to the Series D-3 stockholders to purchase 666,644 shares of common stock at an exercise price of $7.52 per share (the “2003 common stock warrants”). The 2003 common stock warrants were to expire upon the earlier of June 2008 or the closing of an IPO.

Between April 1, 2005 and the closing of the Company’s IPO, the holders of warrants to purchase 664,648 shares of the Company’s common stock exercised their warrants. Of these warrants, the holders of warrants to purchase 562,520 shares elected to net exercise their warrants which resulted in the issuance of 178,216 shares of common stock and no proceeds to the Company from the exercise of these warrants. Holders of warrants to purchase 102,128 shares of common stock exercised their 2003 common stock warrants for cash providing proceeds to the Company of approximately $768,000.

Of the 2003 common stock warrants, there were warrants to purchase 1,996 shares of common stock that were not exercised prior to closing of the IPO and expired.

2005 Common Stock Warrants

In conjunction with the Series E preferred stock financing in February and March of 2005, the Company issued warrants to purchase common stock of the Company (the “2005 common stock warrants”). The 2005 common stock warrants were not initially exercisable, but were to become exercisable for an aggregate of 671,614 shares of common stock at $9.00 per share if the Company had not closed the IPO prior to December 31, 2005, or for an adjusted number of shares (calculated based on the IPO price) with an exercise price of $0.000225 if the IPO closed prior to December 31, 2005 at a price less than $13.50 per share. Based on the IPO price of $11.00 per share, the 2005 common stock warrants became exercisable for an aggregate of 305,272 shares of common stock at an exercise price of $0.000225 per share.

Between April 1, 2005 and March 31, 2006, warrants to purchase 289,794 of common stock were exercised. All of these warrants were exercised at an aggregate exercise price of $0.000225 per share. Warrants covering an aggregate of 265,537 shares of common stock were exercised without cash. In most cases the aggregate purchase price was offset by the value of fractional shares payable upon exercise of such warrants; however an aggregate of 2 shares were withheld in payment of the aggregate exercise price of one warrant resulting in a net issue of 265,535 shares. Warrants covering an additional 24,259 shares of common stock were exercised for cash. In fiscal 2007, the remaining warrants to purchase 15,476 shares of common stock at an exercise price of $0.000225 were exercised.

Prior to the completion of the IPO, the 2005 common stock warrants were accounted for as a liability and marked to market at each period-end date. The original aggregate fair value of these warrants of $3,201,000 was recorded as a liability. Upon completion of the IPO, the fair value of these warrants was approximately $3,359,000 and the Company recognized a non-operating charge of $158,000 in the quarter ended June 30, 2005. Following the completion of the IPO, these warrants were accounted for as a component of stockholders’ equity. Subsequent changes in the fair value of these warrants were not reflected in income.

The difference between the proceeds allocated to the Series E preferred stock and the estimated fair value of the common stock issuable upon conversion resulted in a beneficial conversion feature on the Series E preferred stock which was recorded as a reduction to the Series E preferred stock and an increase to additional paid-in-capital. The total beneficial conversion feature was $383,000 which, prior to the IPO, was being amortized as a reduction of net loss available to common stockholders over the period of redemption of the Series E preferred stock. Upon completion of the IPO, the Company recorded a charge of $383,000 for the beneficial conversion feature in the quarter ended June 30, 2005.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Note 9 — Stock Option Plans and Other Employee Benefits

Stock options

The Company’s stock option program is a long-term retention program that is intended to attract, retain and provide incentives for talented employees, officers and directors, and to align stockholder and employee interests. The Company considers the stock option program critical to its operations and productivity. As of March 31, 2007, the Company has three stock option plans: the 1996 Stock Option Plan (the “1996 Plan”), the 1998 Stock Plan (the “1998 Plan”), and the 2005 Equity Incentive Plan (the “2005 Plan”). Currently, the Company grants options from the 2005 Plan, which permits the Company to grant options to all employees, including executive officers, and outside consultants, and directors. Effective June 16, 2005, no new options may be granted under the 1996 plan or the 1998 Plan. Stock options issued under the Company’s stock option plans generally vest based on 4 years of continuous service and have 10-year contractual terms.

1996 Stock Option Plan

As of June 16, 2005, no new stock option grants were permitted under the 1996 Plan. There are no outstanding options under the 1996 Plan and, as of the effectiveness of the Company’s IPO, there were no outstanding options under the 1996 Plan.

1998 Stock Plan

As of June 16, 2005, no new stock option grants were permitted under the 1998 Plan. However, all options previously granted under the 1998 Plan continue to be administered under the 1998 Plan. As of March 31, 2007, options to purchase 1,244,273 shares of common stock were outstanding under the 1998 Plan.

2005 Equity Incentive Plan

The 2005 Plan became effective upon the Company’s IPO. The 2005 Plan provides for the issuance of stock options, stock appreciation rights, stock awards (stock and stock units) and cash awards. The Company initially reserved a total of 2,395,020 shares of its common stock for issuance under the 2005 Plan. In addition, the 2005 Plan provides for an automatic annual increase in the number of shares reserved for issuance there under on each April 1 by an amount equal to the lesser of (i) 5% of the Company’s total number of outstanding shares on the immediately preceeding March 31; (ii) 666,666 shares, or (iii) a number of shares determined by the Company’s Board of Directors. The shares reserved under the 2005 Plan will also be increased as a result of the forfeiture or repurchase of shares issued under the 1998 Plan and the cancellation of unexercised options under the 1998 Plan. As of March 31, 2007, there were 3,089,941 remaining shares reserved for issuance under the 2005 Plan, of which 1,142,658 were available for grant, 1,937,283 shares were subject to outstanding options and 10,000 shares were subject to outstanding restricted stock units.

2005 Employee Stock Purchase Plan

The 2005 Employee Stock Purchase Plan (the “Purchase Plan”) became effective upon the Company’s IPO. The Purchase Plan provides employees with an opportunity to purchase the Company’s common stock through accumulated payroll deductions.

The Company initially reserved a total of 222,222 shares of common stock for issuance under the Purchase Plan. The Purchase Plan provides for annual increases in the total number of shares available for issuance under this plan on April 1st of each year beginning on April 1, 2006, by a number of shares that is equal to the lesser of: (1) 2% of the outstanding shares of the Company’s common stock on the immediately preceding March 31st; (2) 222,222 shares; or (3) a lesser number determined by the Company’s Board of Directors. As of March 31, 2007, there were 326,726 shares reserved for issuance under the Purchase Plan.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The Purchase Plan permits participants to purchase the Company’s common stock through payroll deductions of up to 15% of the participant’s compensation, provided that no participant may purchase shares with a value that exceeds $25,000 per year, or more than 1,111 shares per purchase period. Amounts deducted and accumulated for the participant’s account are used to purchase shares of the Company’s common stock on the last trading day of each purchase period at a price of at least 85% of the lesser of the fair market values of the common stock at the beginning of the offering period or at the end of the purchase period.

The Purchase Plan provides for offering periods of 12 months and purchase periods of 6 months or such shorter period as may be established by the Company’s Board of Directors. The offering periods start on April 1st and October 1st of each year. During the year ended March 31, 2007, there were 77,564 shares issued at a purchase price ranging from $8.25 to $11.93 per share and during the year ended March 31, 2006 there were 40,154 shares issued at a purchase price ranging from $8.25 to $8.41 per share under the Purchase Plan.

Stock-Based Compensation

On April 1, 2006, the Company adopted the provisions of SFAS 123R. Under the fair value recognition provisions of this statement, stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense on a straight-line basis over the requisite service period, which is generally the vesting period. The Company transitioned to SFAS 123R using the modified-prospective method, under which prior periods have not been revised for comparative purposes. The Company’s financial statements as of and for the year ended March 31, 2007 reflect the impact of SFAS 123R. The valuation provisions of SFAS 123R apply to new grants and to grants that were outstanding as of the effective date and are subsequently modified. Estimated compensation for grants that were outstanding as of the effective date will be recognized over the remaining service period using the compensation cost previously estimated for the Company’s SFAS 123 pro forma disclosures, excluding pre-IPO options, for which the fair value was determined using the minimum value method. For these grants, any remaining unamortized deferred compensation expenses will continue to be accounted for under the intrinsic value method of APB 25.

Stock-based compensation expense recognized during the period is based on the value of the portion of share-based payment awards that is ultimately expected to vest. Recognized stock-based compensation expense includes compensation expense for share-based payment awards granted prior to, but not yet vested as of April 1, 2006, based on the grant date fair value estimated in accordance with the pro forma provisions of SFAS 123 for options granted after the Company’s IPO. Compensation expense for the share-based payment awards granted subsequent to April 1, 2006 is based on the grant date fair value estimated in accordance with the provisions of SFAS 123R. Stock-based compensation charges also include the amortization of unrecognized deferred compensation charges as deferred under APB 25 for all options granted prior to the Company’s IPO. The estimated fair value of the Company’s equity-based awards, less expected forfeitures, is amortized over the awards’ vesting periods on a straight-line basis. In the Company’s pro forma information required to be disclosed under SFAS 123 for the periods prior to April 1, 2006, the Company accounted for forfeitures as they occurred.

The Company currently uses the Black-Scholes option pricing model to determine the fair value of employee stock options and employee stock purchase plan shares. The determination of the fair value of stock-based payment awards on the date of grant using an option pricing model is affected by the Company’s stock price as well as by assumptions regarding a number of complex and subjective variables. These variables include the Company’s expected stock price volatility over the term of the awards, actual and projected employee stock option exercise behaviors, risk-free interest rate and expected dividends.

Because there is insufficient historical information available to estimate the expected term of the stock-based awards, the Company adopted the simplified method for estimating the expected term pursuant to Staff Accounting Bulletin No. 107 (“SAB 107”). On this basis, the Company estimated the expected term of options granted by taking the average of the vesting term and the contractual term of the option.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The expected volatility used in the valuation model is based on the Company’s peer group in the industry in which it does business and the Company’s historical volatility since its IPO.

The risk-free interest rate is based on the yield on zero-coupon U.S. Treasury securities with remaining terms similar to the expected term on the employee stock option and employee stock purchase plan awards.

The Company does not anticipate paying any cash dividends in the foreseeable future and therefore uses an expected dividend yield of zero in the option valuation model.

The Company is required to estimate forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ from those estimates. The Company uses historical data to estimate pre-vesting option forfeitures and record stock-based compensation expense only for those awards that are expected to vest. All stock-based payment awards are amortized on a straight-line basis over the requisite service periods of the awards, which are generally the vesting periods.

The determination of the fair value of employee stock options and employee stock purchase plan shares has been estimated using the following weighted-average assumptions:

	Years Ended March 31,
	2007			2006			2005
Employee Stock Option Plans
Expected term (in years)		6			4			4
Volatility		44	%		44	%		0	%
Risk-free interest rate		4.7	%		4.3	%		3.5	%
Expected dividend yield		0	%		0	%		0	%
Weighted average fair value at date of grant	$	8.30		$	3.69		$	0.74
Employee Stock Purchase Plan
Expected term (in years)		0.5			0.5			—
Volatility		45	%		44	%		—
Risk-free interest rate		5.1	%		4.2	%		—
Expected dividend yield		0	%		0	%		—

The fair value of each purchase right granted under the Company’s Employee Stock Purchase Plan during the year ended March 31, 2007 and 2006 was estimated at the date of grant using the Black-Scholes option pricing model, and is not subject to revaluation as a result of subsequent stock price fluctuations.

Total stock-based compensation expense included in results of operations is as follows (in thousands):

	Years Ended March 31,
	2007		2006		2005
Cost of goods sold	$	218	$	26	$	26
Research and development		222		22		69
Sales and marketing		802		169		134
General and administrative		1,332		172		3,210
Total	$	2,574	$	389	$	3,439

As of March 31, 2007, there was approximately $5,170,000 of total stock-based compensation expense, after estimated forfeitures, related to unvested employee stock options and restricted stock units, which is expected to be recognized over an estimated weighted average amortization period 2.8 years.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The table below summarizes the effect of recording stock-based compensation expense under SFAS 123R and includes charges related to option modifications for the year ended March 31, 2007 which is allocated as follows:

	Year Ended
	March 31, 2007
Cost of goods sold	$	193
Research and development		203
Sales and marketing		684
General and administrative		1,124
Total	$	2,204

Additionally, approximately $89,000 in stock-based compensation expense related to SFAS 123R has been capitalized in inventory at March 31, 2007.

Stock-based compensation expense recognized for the years ended March 31, 2007, 2006 and 2005 related to the amortization of deferred stock-based compensation was $213,000, $229,000 and $265,000, respectively. The Company anticipates to record the remaining amortization of deferred compensation of $164,000 in fiscal 2008. This deferred stock-based compensation expense will be reduced in the period of forfeiture for any accrued but unvested compensation arising from early termination of an option holder’s services. The aggregate deferred stock compensation charge was reduced during fiscal 2007 and 2006 by approximately $20,000 and $4,000, respectively due to the cancellations and exercise accelerations of the stock options.

In previous years, certain stock options were issued to non-employees, generally in exchange for consulting services related to patient studies or marketing analysis. The stock options are recorded at their fair value on the date of vesting and recognized over the respective service or vesting period. The fair value of the stock options granted was calculated at each reporting date using the Black-Scholes option pricing model using the following assumptions:

	Years Ended March 31,
	2007			2006			2005
Expected term (in years)		5			6			7
Volatility		42	%		45	%		51	%
Risk-free interest rate		4.7	%		4.4	%		4.6	%
Expected dividend yield		0	%		0	%		0	%

Stock-based compensation expense recognized for the years ended March 31, 2007, 2006 and 2005 related to non-employee options was $157,000, $160,000 and $189,000, respectively. The non-employee stock-based compensation expense will fluctuate as the fair market value of the common stock fluctuates

In March 2005, the Company entered into a settlement agreement with its former CEO relating to his termination in November 2004. The settlement agreement provided that in consideration for executing a release of all claims against the Company, the former CEO would be paid $100,000, payable in equal installments of $20,000 over a period of five fiscal quarters. In addition, all options held by the former CEO continued to vest through February 28, 2005 and all vested options at that date were exercisable through August 31, 2005. As a result of the continued vesting and the change in the exercise date of the options, in the quarter ended March 31, 2005 the Company recorded a general and administrative expense of $2,985,000 related to the intrinsic value of the approximately 325,322 affected options held by the former CEO.

Periods prior to the adoption of SFAS 123R

SFAS 123R requires the Company to present pro forma information for the comparative period prior to the adoption as if it had accounted for all of its stock options under the fair value method of SFAS 123.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The following table sets forth the pro forma amounts regarding the effect on net loss and net loss per share for the year ended March 31, 2006 and 2005 that would have resulted if the Company had accounted for its employee stock plans under the fair value provisions of SFAS 123:

	Years Ended March 31,
	2006			2005
Net loss attributable to common stockholders (as reported)	$	(8,920	)	$	(7,292	)
Add: Stock-based employee compensation expenses included in reported net loss		229			3,250
Deduct: Total stock-based employee compensation expenses determined under fair value based method for all awards		(829	)		(4,300	)
Adjusted net loss attributable to common stockholders	$	(9,520	)	$	(8,342	)
Net loss per common share attributable to common stockholders, basic and diluted:
As reported	$	(0.79	)	$	(5.22	)
Adjusted	$	(0.85	)	$	(5.97	)

General stock option information

The following table sets forth the summary of option and restricted stock unit activity for the year ended March 31, 2007:

						Weighted-
						Average
				Weighted-		Remaining
				Average		Contractual
				Exercise		Term		Aggregate
	Shares			Price		(In Years)		Intrinsic Value
								(In thousands)
Options outstanding at March 31, 2006		2,804		$	6.54
Options granted		1,257		$	16.49
Restricted stock units awarded		10		$	—
Options exercised		(619	)	$	3.72
Options forfeited		(254	)	$	10.16
Options expired		(6	)	$	11.78
Options and restricted stock units outstanding at March 31, 2007		3,192		$	10.71		8.5	$	41,773
Options exercisable at March 31, 2007		1,135		$	6.70		7.5	$	19,449

The weighted average per share fair value of options granted during the year ended March 31, 2007 was $8.30 per share. The total aggregate intrinsic value of options exercised during the years ended March 31, 2007 and 2006 was $8,546,000 and $5,804,000, respectively. The market value of a share of the Company’s common stock as of March 30, 2007 was $23.84 per share as reported by The NASDAQ Stock Market.

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The options outstanding and currently exercisable by exercise price at March 31, 2007 are as follows (in thousands, except per share data):

	Options Outstanding						Options Exercisable
			Weighted
			Average		Weighted				Weighted
			Remaining		Average				Average
	Number		Contractual Life		Exercise		Number		Exercise
Range of Exercise Prices	Outstanding		(Years)		Price		Exercisable		Price
$ 0.68 - $ 1.01		160		5.2	$	0.81		157	$	0.81
$ 1.01 - $ 1.15		106		6.8	$	1.15		86	$	1.15
$ 5.63 - $ 5.63		751		7.7	$	5.63		467	$	5.63
$ 6.51 - $ 9.50		461		8.7	$	8.67		128	$	8.69
$ 9.64 - $12.52		468		8.8	$	10.85		139	$	10.48
$12.53 - $13.75		484		8.6	$	13.19		136	$	13.12
$13.83 - $19.50		464		9.5	$	17.25		22	$	17.68
$19.58 - $24.05		288		9.8	$	21.36		—	$	—
$ 0.68 - $24.05		3,182		8.5	$	10.71		1,135	$	6.70

401(k) Savings Plan

The Company has a 401(k) income deferral plan (the “401(k) Plan”). Eligible participants may contribute up to 75% of their pretax salary up to the maximum allowed under Internal Revenue Service regulations. According to the terms of the 401(k) Plan, the Company may make discretionary matching contributions to the 401(k) Plan each year, allocable to all plan participants. The Company made no discretionary contributions during the years ended March 31, 2007, 2006 and 2005.

Note 10 — Segments

Revenues from unaffiliated customers by geographic area, based on the customer’s shipment locations were as follows (in thousands):

	Years Ended March 31,
	2007		2006		2005
United States	$	28,868	$	15,531	$	12,516
Japan		8,661		2,228		—
United Kingdom		6,448		4,498		3,327
Rest of the world		14,818		10,524		8,169
Total revenues	$	58,795	$	32,781	$	24,012

The Company’s long lived assets by geographic area (in thousands):

	March 31,
	2007		2006
United States	$	4,342	$	2,246
United Kingdom		120		54
Rest of the world		186		188
	$	4,648	$	2,488

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

The Company identifies its operating segments based on how management views and evaluates the Company’s operations, which is primarily based on geographic location. For all periods presented, the Company operated in three business segments, the Americas, Europe and Asia Pacific. The products and services sold by each segment are substantially the same and the Company evaluates performance and allocates resources primarily based on revenues and gross profit. Revenues and gross profit for these segments were as follows (in thousands):

	Years Ended March 31,
	2007		2006		2005
Revenues:
Americas	$	31,618	$	17,381	$	13,266
Europe		17,674		12,532		10,226
Asia Pacific		9,503		2,868		520
Total	$	58,795	$	32,781	$	24,012
Gross Profit:
Americas	$	25,426	$	13,123	$	9,068
Europe		11,948		8,236		6,595
Asia Pacific		6,060		1,712		346
Total	$	43,434	$	23,071	$	16,009

Total assets by operating segments at March 31, 2007 and 2006 were as follows (in thousands):

	March 31,
	2007		2006
Americas	$	56,507	$	47,954
Europe		16,590		14,160
	$	73,097	$	62,114

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MICRUS ENDOVASCULAR CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS — (Continued)

Note 11 — Quarterly Financial Information (unaudited)

The following table represents certain unaudited quarterly information for the eight quarters ended March 31, 2007. In management’s opinion, this information has been prepared on the same basis as the audited financial statements and includes all the adjustments necessary to fairly state the unaudited quarterly results of operations set forth herein.

	First			Second			Third			Fourth
	Quarter			Quarter			Quarter			Quarter
2007:
Revenues	$	12,683		$	14,527		$	15,544		$	16,041
Gross profit		9,421			10,633			11,352			12,028
Net loss attributable to common stockholders	$	(2,959	)	$	(151	)	$	(1,002	)	$	(1,371	)
Net loss attributable to common stockholders basic and diluted:	$	(0.21	)	$	(0.01	)	$	(0.07	)	$	(0.09	)
2006:
Revenues	$	7,112		$	6,130		$	8,092		$	11,447
Gross profit		4,993			4,401			5,676			8,001
Net loss attributable to common stockholders	$	(1,897	)	$	(2,831	)	$	(1,652	)	$	(2,540	)
Net loss attributable to common stockholders basic and diluted:	$	(0.70	)	$	(0.20	)	$	(0.12	)	$	(0.18	)

90

Item 9.   Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

None

Item 9A.   Controls and Procedures.

(a) Evaluation of disclosure controls and procedures.

With the participation of our Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), management has evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of the end of the period covered by this report. Based on such evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of such period, our disclosure controls and procedures are effective.

(b) Management’s report on internal control over financial reporting.

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f), to provide reasonable assurance regarding the reliability of our financial reporting and the preparation of financial statements for external purposes in accordance with U.S. generally accepted accounting principles. Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the design and operational effectiveness of our internal control over financial reporting as of March 31, 2007 based on the framework in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). We have excluded from our evaluation the internal control over financial reporting of Micrus Design Technology, Inc., a newly formed subsidiary established in connection with the acquisition of VasCon on November 30, 2006. This company is a wholly-owned subsidiary whose combined total assets and total revenue represented 11% and 1%, respectively, of the related consolidated financial statements as of and for the year ended March 31, 2007.

Our management, including the CEO and CFO, does not expect our disclosure controls or our internal control over financial reporting will prevent or detect all errors or all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. The design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Further, because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that misstatements due to error or fraud will not occur or that all control issues and instances of fraud, if any, within the company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Controls can also be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the controls. The design of any system of controls is based in part on certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Projections of any evaluation of controls effectiveness to future periods are subject to risks. Over time, controls may become inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures.

Based on our evaluation utilizing the criteria set forth in Internal Control — Integrated Framework issued by COSO, our management (including our CEO and CFO) concluded that our internal control over financial reporting was effective as of March 31, 2007. Management’s assessment of the effectiveness of our internal control over financial reporting as of March 31, 2007 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report included at Item 8 in this Annual Report on Form 10-K.

(c) Changes in internal control over financial reporting.

There have not been any changes in our internal control over financial reporting (as defined in Rule 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934) during the fourth quarter of our fiscal year ended March 31, 2007 that have materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

91

Item 9B.   Other Information.

None

PART III

Item 10.   Directors and Executive Officers of the Registrant.

Information required by this item is incorporated by reference to the Micrus Proxy Statement for the 2007 Annual Meeting of Stockholders.

Item 11.   Executive Compensation.

Information required by this item is incorporated by reference to the Micrus Proxy Statement for the 2007 Annual Meeting of Stockholders.

Item 12.   Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Information required by this item is incorporated by reference to the Micrus Proxy Statement for the 2007 Annual Meeting of Stockholders

Item 13.   Certain Relationships and Related Transactions.

Information required by this item is incorporated by reference to the Micrus Proxy Statement for the 2007 Annual Meeting of Stockholders.

Item 14.   Principal Accountant Fees and Services.

Information required by this item is incorporated by reference to the Micrus Proxy Statement for the 2007 Annual Meeting of Stockholders.

PART IV

Item 15.   Exhibits and Financial Statement Schedules.

(a) The following documents are filed as part of this Annual Report on Form 10-K:

(1) Financial Statements.  The following statements of Micrus Endovascular Corporation and the report of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm, are included in Part II, Item 8.

(2) Financial Statement Schedules.  The following schedule is required to be filed by Item 15(b).

Schedule II — Valuation and Qualifying Accounts for each of the three years in the period ended March 31, 2007

All other schedules have been omitted because they are either inapplicable or the required information has been provided in the consolidated financial statements or the notes thereto.

(b) Exhibits.  The list of exhibits on the Index to Exhibits on pages 96 through 97 of this report is incorporated herein by reference.

92

SIGNATURE

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, Micrus Endovascular Corporation has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

MICRUS ENDOVASCULAR CORPORATION

By:  /s/  JOHN T. KILCOYNE

John T. Kilcoyne

President and Chief Executive Officer

Date: June 7, 2007

POWERS OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints John T. Kilcoyne and Robert A. Stern, and each of them, his true and lawful attorneys-in-fact and agents with full power of substitution, for him and in his name, place and stead, in any and all capacities, to sign any amendments to this Report on Form 10-K and to file the same, with exhibits thereto and other documents in connection therewith with the Securities and Exchange Commission, hereby ratifying and confirming all that each of said attorneys-in-fact, or his substitute or substitutes may do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, this Form 10-K has been signed by the following persons in the capacities and on the dates indicated:

Signatures	Title	Date
/s/  JOHN T. KILCOYNE John T. Kilcoyne	President and Chief Executive Officer (Principal Executive Officer)	June 7, 2007
/s/  ROBERT A. STERN Robert A. Stern	Executive Vice President, Chief Financial Officer and Secretary (Principal Financial and Accounting Officer)	June 7, 2007
/s/  MICHAEL R. HENSON Michael R. Henson	Chairman of the Board of Directors and Director	June 7, 2007
/s/  MICHAEL EAGLE Michael Eagle	Director	June 7, 2007
/s/  L. NELSON HOPKINS L. Nelson Hopkins, M.D.	Director	June 7, 2007
/s/  FRED HOLUBOW Fred Holubow	Director	June 7, 2007
/s/  FRANCIS J. SHAMMO Francis J. Shammo	Director	June 7, 2007

93

Signatures	Title	Date
/s/  JEFFREY H. THIEL Jeffrey H. Thiel	Director	June 7, 2007
/s/  GREGORY H. WOLF Gregory H. Wolf	Director	June 7, 2007

94

Schedule II — Valuation and Qualifying Accounts

	Balance at		Additions/
	Beginning		Charged to						Balance at
	of Year		Expenses			Deduction			End of Year
Allowance for Doubtful Accounts
Year Ended March 31, 2007	$	317	$	(84	)	$	1		$	234
Year Ended March 31, 2006		230		102			(15	)		317
Year Ended March 31, 2005		267		11			(48	)		230
Valuation allowance — deferred tax assets
Year Ended March 31, 2007		16,078		1,936			(264	)		17,750
Year Ended March 31, 2006		16,731		—			(653	)		16,078
Year Ended March 31, 2005		15,000		1,731			—			16,731

95

INDEX TO EXHIBITS

Exhibit
Number			Description
	3	.1	Certificate of Incorporation (Filed as Exhibit 3.2 of Amendment No. 3 to the Company’s Registration Statement on Form S-1 filed on May 17, 2005 (Registration No. 333-123154) (“Amendment No. 3”), and incorporated herein by reference)
	3	.2	Bylaws (Filed as Exhibit 3.4 of Amendment No. 3, and incorporated herein by reference)
	4	.1	Specimen Stock Certificate (Filed as Exhibit 4.1 of the Company’s Registration Statement on Form S-1 filed on March 4, 2005 (Registration No. 333-123154) (“Form S-1”), and incorporated herein by reference)
	4	.2	Warrant dated as of December 11, 2000 among the Registrant and Roberts Mitani Capital, LLC (Filed as Exhibit 4.2 of Form S-1, and incorporated herein by reference)
	4	.3	Amended and Restated Stockholders’ Rights Agreement dated as of February 21, 2005 among the Registrant and the parties listed therein (Filed as Exhibit 4.3 of Form S-1, and incorporated herein by reference)
	4	.4	Form of Common Stock Warrant issued in connection with the Series E Preferred Stock and Warrant Purchase Agreement dated February 21, 2005, among the Company and the purchasers of the Company’s Series E Preferred Stock (Filed as Exhibit 4.4 to the Company’s Quarterly Report on Form 10-Q filed on February 14, 2006, and incorporated herein by reference)
	10	.1*	1996 Stock Option Plan (Filed as Exhibit 10.1 of Form S-1, and incorporated herein by reference)
	10	.2*	1998 Stock Plan (Filed as Exhibit 10.2 of Form S-1, and incorporated herein by reference)
	10	.3*	2005 Equity Incentive Plan (Filed as Exhibit 10.3 of Amendment No. 4 to the Company’s Registration Statement on Form S-1 filed on May 23, 2005 (Registration No. 333-123154) (“Amendment No. 4”), and incorporated herein by reference)
	10	.4*	2005 Equity Incentive Plan — Form of Incentive Stock Option Agreement for Executive Officers and Directors (Filed as Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed on August 15, 2005, and incorporated herein by reference)
	10	.5*	2005 Equity Incentive Plan — Form of Nonstatutory Stock Option Agreement for Executive Officers and Directors (Filed as Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q filed on August 15, 2005, and incorporated herein by reference)
	10	.6*	Employee Cash Bonus Plan with respect to Executive Officers (Filed as Exhibit 99.1 to the Company’s Current Report on Form 8-K filed on July 19, 2005, and incorporated herein by reference)
	10	.7*	2005 Employee Stock Purchase Plan, as amended (Filed as Exhibit 10.4 of Amendment No. 6 to the Company’s Registration Statement on Form S-1 filed on June 13, 2005 (Registration No. 333-123154) (“Amendment No. 6”), and incorporated herein by reference)
	10	.8*	Letter Agreement dated November 15, 2004 with John R. Kilcoyne (Filed as Exhibit 10.7 of Form S-1, and incorporated herein by reference)
	10	.9*	Letter Agreement dated November 5, 2003 with Robert A. Stern (Filed as Exhibit 10.8 of Form S-1, and incorporated herein by reference)
	10	.10*	Letter Agreement dated June 12, 1998 with Tom M. Holdych (Filed as Exhibit 10.9 of Form S-1, and incorporated herein by reference)
	10	.11*	Letter Agreement dated May 23, 2003 with Edward F. Ruppel, Jr. (Filed as Exhibit 10.10 of Form S-1, and incorporated herein by reference)
	10	.12*	Letter Agreement dated October 25, 2004 with Eckhard H. Reitz (Filed as Exhibit 10.13 of Form S-1, and incorporated herein by reference)
	10	.13*	Letter Agreement dated February 16, 2005 with Robert C. Colloton (Filed as Exhibit 10.23 of Amendment No. 6, and incorporated herein by reference)
	10	.15	Office Lease dated June 6, 2005 between the Registrant and WW/LJ GATEWAYS LTD., a California limited partnership, for office space located at 821 Fox Lane in San Jose, California (Filed as Exhibit 99.1 to the Company’s Current Report on Form 8-K filed on July 5, 2005, and incorporated herein by reference)

96

Exhibit
Number			Description
	10	.16**	Distribution Agreement, dated September 30, 2005, between Micrus Endovascular Corporation and Goodman CO., Ltd. (Filed as Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q filed on November 14, 2005, and incorporated herein by reference)
	10	.17	Share Purchase Agreement, dated September 20, 2005, between Mark Ellis and James Mackenzie and Micrus Endovascular Corporation (Filed as Exhibit 2.1 to the Company’s Current Report on Form 8-K filed on September 26, 2005, and incorporated herein by reference)
	10	.18**	License Agreement, effective July 1, 2005, between Micrus Endovascular Corporation and Micrus Endovascular SA (Filed as Exhibit 10.5 to the Company’s Quarterly Report on Form 10-Q filed on November 14, 2005, and incorporated herein by reference)
	10	.19**	Contract Manufacturing Agreement, effective July 1, 2005, between Micrus Endovascular Corporation and Micrus Endovascular SA (Filed as Exhibit 10.6 to the Company’s Quarterly Report on Form 10-Q filed on November 14, 2005, and incorporated herein by reference)
	10	.20**	Agreement for Sharing Development Costs, effective July 1, 2005, between Micrus Endovascular Corporation and Micrus Endovascular SA (Filed as Exhibit 10.7 to the Company’s Quarterly Report on Form 10-Q filed on November 14, 2005, and incorporated herein by reference)
	10	.21**	Support Services Agreement, effective July 1, 2005, between Micrus Endovascular Corporation and Micrus Endovascular SA (Filed as Exhibit 10.8 to the Company’s Quarterly Report on Form 10-Q filed on November 14, 2005, and incorporated herein by reference)
	10	.22**	Technology Transfer Agreement, effective July 28, 2005, between Micrus Endovascular Corporation and VascularFX (Filed as Exhibit 10.9 to the Company’s Quarterly Report on Form 10-Q filed on November 14, 2005, and incorporated herein by reference)
	10	.23**	License, Development and Distribution Agreement, effective January 6, 2006, between Micrus Endovascular Corporation and Biotronik AG (Filed as Exhibit 10.23 to the Company’s Annual Report on Form 10-K filed on June 16, 2006 and incorporated herein by reference)
	10	.24**	Asset Purchase Agreement dated November 30, 2006 by and among the Registrant, Micrus Design Technology, Inc. , VasCon, LLC and the members of VasCon, LLC (Filed as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed on February 14, 2007 and incorporated herein by reference)
	10	.25	Form of Director and Executive Officer Indemnification Agreement (Filed as Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q filed on February 14, 2007)
	21	.1#	List of Subsidiaries
	23	.1#	Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm
	24	.1#	Powers of Attorney (appears on the signature page of this form)
	31	.1#	Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
	31	.2#	Certification of Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
	32	.1#	Certifications Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

#	Filed herewith.
*	Indicates a management contract or compensatory plan or arrangement, as required by Item 15(a)3.
**	Confidential treatment requested for certain portions of this Exhibit pursuant to Rule 24b-2 promulgated under the Securities Exchange Act, which portions are omitted and filed separately with the Securities and Exchange Commission.

97

EX-21.1

EXHIBIT 21.1

SUBSIDIARIES OF MICRUS ENDOVASCULAR CORPORATION

Name	Jurisdiction of Registration
Micrus Endovascular SA Micrus Endovascular UK Ltd. Micrus Design Technology, Inc.	Switzerland United Kingdom Florida, USA

EX-23.1

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-126270) of Micrus Endovascular Corporation of our report dated June 7, 2007 relating to the financial statements, financial statement schedule, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP
San Jose, California
June 7, 2007

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

I, John T. Kilcoyne, certify that:

1. I have reviewed the Annual Report on Form 10-K of Micrus Endovascular Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statement were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)), for the registrant and have:

     a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

     b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;

     c. evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

     d. disclosed in this report any changes in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based upon our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

     a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

     b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

June 7, 2007

By:	/s/ John T. Kilcoyne
	John T. Kilcoyne
	President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

I, Robert A. Stern, certify that:

1. I have reviewed the Annual Report on Form 10-K of Micrus Endovascular Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statement were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)), for the registrant and have:

     a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

     b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;

     c. evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

     d. disclosed in this report any changes in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based upon our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

     a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

     b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

June 7, 2007

By:	/s/ Robert A. Stern
	Robert A. Stern
	Executive Vice President,
	Chief Financial Officer and Secretary

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Annual Report of Micrus Endovascular Corporation (the “Company”) on Form 10-K for the period ended March 31, 2007, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

     (1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

     (2) The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Company.

By:	/s/ John T. Kilcoyne
John T. Kilcoyne
President and Chief Executive Officer
By:	/s/ Robert A. Stern
Robert A. Stern
Executive Vice President,
Chief Financial Officer and Secretary
Date: June 7, 2007