Amended Statement of Ownership (sc 13g/a)

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

SCHEDULE 13G

(Amendment 4)

UNDER THE SECURITIES EXCHANGE ACT OF 1934¹

IMRIS Inc.

(Name of Issuer)

Common Shares

(Title of Class of Securities)

45322N105

(CUSIP Number)

December 31, 2014

(Date of Event Which Requires Filing of This Statement)

Check the Appropriate box to designate the rule pursuant to which this schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

¹ 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 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 45322N105

13G

Page 2 of 9 Pages

1	NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
	H. David Graves
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*			(a) x (b) ¨
	The group of reporting persons on this Schedule 13G includes: H. David Graves and Norpine Holdings Inc.
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION
	Canadian
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER
			170,905*
		6	SHARED VOTING POWER
			14,276,131*
		7	SOLE DISPOSITIVE POWER
			170,905*
		8	SHARED DISPOSITIVE POWER
			14,276,131*
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	14,447,036* *H. David Graves beneficially owns 14,447,036 common shares of IMRIS Inc. Of the common shares beneficially held by Mr. Graves, 11,899,371 common shares are held directly by Norpine Holdings Inc. over which Mr. Graves has sole investment and voting control, and 2,376,760 common shares are held directly by Centara Corporation, over which Mr. Graves has sole investment and voting control. The remaining 170,905 common shares are issuable upon the exercise of options granted to Mr. Graves by IMRIS Inc. All of these options were exercisable as at December 31, 2014.
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* q
	Not Applicable
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
	23.1%
12	TYPE OF REPORTING PERSON*
	IN

CUSIP No. 45322N105

13G

Page 3 of 9 Pages

1	NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
	Norpine Holdings Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*			(a) x (b) ¨
	The group of reporting on this Schedule 13G includes: H. David Graves, Norpine Holdings Inc. and Centara Corporation.
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION
	Manitoba, Canada
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER
			11,899,371*
		6	SHARED VOTING POWER
			Not applicable
		7	SOLE DISPOSITIVE POWER
			11,899,371*
		8	SHARED DISPOSITIVE POWER
			Not applicable
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	11,899,371* *H. David Graves beneficially owns 14,447,036 common shares of IMRIS Inc. Of the common shares beneficially held by Mr. Graves, 11,899,371 common shares are held directly by Norpine Holdings Inc. over which Mr. Graves has sole investment and voting control, and 2,376,760 common shares are held directly by Centara Corporation, over which Mr. Graves has sole investment and voting control. The remaining 170,905 common shares are issuable upon the exercise of options granted to Mr. Graves by IMRIS Inc. All of these options were exercisable as at December 31, 2014.
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* q
	Not Applicable
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
	19.0%
12	TYPE OF REPORTING PERSON*
	CO

CUSIP No. 45322N105

13G

Page 4 of 9 Pages

1	NAME OF REPORTING PERSONS S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS
	Centara Corporation
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*			(a) x (b) ¨
	The group of reporting on this Schedule 13G includes: H. David Graves, Norpine Holdings Inc. and Centara Corporation.
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION
	Manitoba, Canada
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER
			2,376,760*
		6	SHARED VOTING POWER
			Not applicable
		7	SOLE DISPOSITIVE POWER
			2,376,760*
		8	SHARED DISPOSITIVE POWER
			Not applicable
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	2,376,760* *H. David Graves beneficially owns 14,447,036 common shares of IMRIS Inc. Of the common shares beneficially held by Mr. Graves, 11,899,371 common shares are held directly by Norpine Holdings Inc. over which Mr. Graves has sole investment and voting control, and 2,376,760 common shares are held directly by Centara Corporation, over which Mr. Graves has sole investment and voting control. The remaining 170,905 common shares are issuable upon the exercise of options granted to Mr. Graves by IMRIS Inc. All of these options were exercisable as at December 31, 2014.
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* q
	Not Applicable
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
	3.8%
12	TYPE OF REPORTING PERSON*
	CO

CUSIP No. 45322N105

13G

Page 5 of 9 Pages

Item 1 (a).

Name of Issuer:

IMRIS Inc.

Item 1 (b).

Address of Issuer’s Principal Executive Offices:

5101 Shady Oak Rd, Minnetonka MN 55343

Item 2 (a).

Name of Person Filing:

H. David Graves (“Graves”)

Norpine Holdings Inc. (“Norpine”)

Centara Corporation

Item 2 (b).

Address of Principal Business Office or, if None, Residence:

6935 Crabapple Drive, Whistler, B.C, V0N1B6

Item 2 (c).

Citizenship:

Graves: Canadian

Norpine: Manitoba, Canada

Item 2 (d).

Title of Class of Securities:

Common Shares

Item 2 (e).

CUSIP Number:

45322N105

Item 3.

If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:

Not Applicable

Item 4.

Ownership

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

(a)

Amount beneficially owned:

See item 9 on the cover pages

(b)

Percent of Class:

See item 11 on the cover pages

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote:

(ii)

Shared power to vote or to direct the vote:

(iii)

Sole power to dispose or to direct the disposition of:

(iv)

Shared power to dispose or to direct the disposition of:

See items 5 – 8 on cover pages

CUSIP No. 45322N105

13G

Page 6 of 9 Pages

Item 5.

Ownership of Five Percent or Less of a Class

If the statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ].

Not Applicable

Item 6.

Ownership of More than Five Percent on Behalf of Another Person

Not Applicable

Item 7.

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

Not Applicable

Item 8.

Identification and Classification of Members of the Group

See Exhibit 2 hereto.

Item 9.

Notice of Dissolution of Group

Not Applicable

Item 10.

Certifications

Not Applicable

CUSIP No. 45322N105

13G

Page 7 of 9 Pages

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct on February 13, 2015.

	/s/ H. David Graves
	H. David Graves


	NORPINE HOLDINGS INC.
	/s/ H. David Graves
	Name: Title:	H. David Graves President

	Centara Corporation
	/s/ H. David Graves
	Name: Title:	H. David Graves President

CUSIP No. 45322N105

13G

Page 8 of 9 Pages

Exhibit 1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Schedule 13G (including amendments thereto) with respect to the common shares of IMRIS Inc. and further agree that this Joint Filing Agreement be included as an exhibit to such joint filing.

Dated: February 13, 2015