IROBOT CORP — Major Shareholding Notification 2010

Feb 12, 2010

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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. 4)*

IROBOT CORPORATION

(Name of Issuer)

COMMON STOCK, PAR VALUE $0.01 PER SHARE (Title of Class of Securities)

462726100

(CUSIP Number)

December 31, 2009

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o	Rule 13d-1(b)
o	Rule 13d-1(c)
þ	Rule 13d-1(d)

• The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

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CUSIP No. 462726100 13G Page 2 of 5 Pages

1	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Helen Greiner
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
	(a) o
	(b) o
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION
	United States
	5	SOLE VOTING POWER
NUMBER OF		1,429,657
SHARES	6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY		–0–
EACH	7	SOLE DISPOSITIVE POWER
REPORTING
PERSON		1,429,657
WITH	8	SHARED DISPOSITIVE POWER
		–0–
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	1,429,657
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
	o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
	5.7%
12	TYPE OF REPORTING PERSON
	IN

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CUSIP No. 462726100 13G Page 3 of 5 Pages

link2 "Item 1(a). Name of Issuer"

Item 1(a). Name of Issuer:

iRobot Corporation

link2 "Item 1(b). Address of Issuer’s Principal Executive Offices"

Item 1(b). Address of Issuer’s Principal Executive Offices:

8 Crosby Drive, Bedford, Massachusetts 01730

link2 "Item 2(a). Name of Person Filing"

Item 2(a). Name of Person Filing:

Helen Greiner

link2 "Item 2(b). Address of Principal Business Office or, if None, Residence"

Item 2(b). Address of Principal Business Office or, if None, Residence:

11 Gage Road Wayland, Massachusetts 01778

link2 "Item 2(c). Citizenship"

Item 2(c). Citizenship:

United States

link2 "Item 2(d). Title of Class of Securities"

Item 2(d). Title of Class of Securities:

Common Stock, par value $0.01 per share (the “Common Stock”)

link2 "Item 2(e). CUSIP Number"

Item 2(e). CUSIP Number:

462726100

link2 "Item 3. Not Applicable"

ITEM 3. Not Applicable.

link2 "Item 4. Ownership"

ITEM 4. Ownership.

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

| (a) | Amount beneficially owned:
1,429,657 (1) shares of Common Stock |
| --- | --- |
| (b) | Percent of class: 5.7% |

The foregoing percentage is calculated based on the 25,032,439 shares of Common Stock of iRobot Corporation outstanding as of October 23, 2009 as reported in the issuer’s Quarterly Report on Form 10-Q filed with the SEC on October 30, 2009.

(c) Number of shares as to which such person has:

(i)	Sole power to vote or to direct the vote: 1,429,657 (1)
(ii)	Shared power to vote or to direct the vote: —0—

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CUSIP No. 462726100 13G Page 4 of 5 Pages

(iii)	Sole power to dispose or to direct the disposition of: 1,429,657 (1)
(iv)	Shared power to dispose or to direct the disposition of: —0—

(1) Includes 14,667 shares of Common Stock issuable to Helen Greiner upon the exercise of stock options within 60 days of December 31, 2009.

link2 "Item 5. Ownership of Five Percent or Less of a Class"

ITEM 5. Ownership of Five Percent or Less of a Class.

Not applicable.

link2 "Item 5. Ownership of Five Percent or Less of a Class"

ITEM 6. Ownership of More than Five Percent on Behalf of Another Person.

Not applicable.

link2 "Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company"

ITEM 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.

Not applicable.

link2 "Item 8. Identification and Classification of Members of the Group"

ITEM 8. Identification and Classification of Members of the Group.

Not applicable.

link2 "Item 9. Notice of Dissolution of Group"

ITEM 9. Notice of Dissolution of Group.

Not applicable.

link2 "Item 10. Certification"

ITEM 10. Certification .

Not applicable.

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CUSIP No. 462726100 13G Page 5 of 5 Pages

link1 "SIGNATURE"

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Date: February 11, 2010

/s/ Helen Greiner
Helen Greiner

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