SC 13D/A 1 arbutus13da2.htm

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549

SCHEDULE 13D
(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO 240.13d-2(a) UNDER THE SECURITIES EXCHANGE ACT OF 1934

AMENDMENT NO. 2*

Arbutus Biopharma Corporation

(Name of Issuer)

Common Shares, no par value

(Title of Class of Securities)

03879J100

(CUSIP Number)

Eric Komitee

General Counsel

55 Railroad Avenue

Greenwich, Connecticut 06830

203-863-5062

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

July 1, 2017

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ☐

Note. Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

(Continued on following pages)

(Page 1 of 18 Pages)

______________________

* 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 disclosures provided in a prior cover page.

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

CUSIP No. 03879J100

13D

Page 2 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Global Investors LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON PN

The calculation assumes that there are a total of 55,024,557 Common Shares outstanding as of April 30, 2017, as reported by the Issuer (as defined below) on its Quarterly Report on Form 10-Q for the period ended March 31, 2017, filed with the Securities and Exchange Commission (the “SEC”) on May 4, 2017.

CUSIP No. 03879J100

13D

Page 3 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Global Performance LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON OO

The calculation assumes that there are a total of 55,024,557 Common Shares outstanding as of April 30, 2017, as reported by the Issuer on its Quarterly Report on Form 10-Q for the period ended March 31, 2017, filed with the SEC on May 4, 2017.

CUSIP No. 03879J100

13D

Page 4 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Global Equities LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON PN

CUSIP No. 03879J100

13D

Page 5 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Global Equities II LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON PN

CUSIP No. 03879J100

13D

Page 6 of 18 Pages

1	NAMES OF REPORTING PERSONS VGE III Portfolio Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON CO

CUSIP No. 03879J100

13D

Page 7 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Long Fund GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON OO

CUSIP No. 03879J100

13D

Page 8 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Long Fund Master Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON CO

CUSIP No. 03879J100

13D

Page 9 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Global Opportunities GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON OO

CUSIP No. 03879J100

13D

Page 10 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Global Opportunities Portfolio GP LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON OO

CUSIP No. 03879J100

13D

Page 11 of 18 Pages

1	NAMES OF REPORTING PERSONS Viking Global Opportunities Illiquid Investments Sub-Master LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON PN

CUSIP No. 03879J100

13D

Page 12 of 18 Pages

1	NAMES OF REPORTING PERSONS O. Andreas Halvorsen
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Norway
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON IN

CUSIP No. 03879J100

13D

Page 13 of 18 Pages

1	NAMES OF REPORTING PERSONS David C. Ott
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION United States
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON IN

CUSIP No. 03879J100

13D

Page 14 of 18 Pages

1	NAMES OF REPORTING PERSONS Rose S. Shabet
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions) (a) o (b) x
3	SEC USE ONLY
4	SOURCE OF FUNDS (see instructions) OO (See Item 3)
5	CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) or 2(e)				o
6	CITIZENSHIP OR PLACE OF ORGANIZATION United States
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH			7	SOLE VOTING POWER 0
			8	SHARED VOTING POWER 0
			9	SOLE DISPOSITIVE POWER 0
			10	SHARED DISPOSITIVE POWER 16,013,540
11		AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,013,540
12		CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (see instructions)			o
13		PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 29.1%*
14		TYPE OF REPORTING PERSON IN

This Amendment No. 2 (the “Amendment”) amends and supplements the Schedule 13D filed by the Reporting Persons on July 13, 2016, as amended and supplemented by Amendment No. 1 filed on June 14, 2017 (as so amended and supplemented, the “Original Schedule 13D”), with respect to the Common Shares of the Issuer. Capitalized terms used in this Amendment and not otherwise defined shall have the same meanings ascribed to them in the Original Schedule 13D.

Item 2. Identity and Background

This Amendment amends and restates Item 2 of the Original Schedule 13D in its entirety as set forth below:

(a), (f) This Schedule 13D is being filed jointly on behalf of Viking Global Investors LP, a Delaware limited partnership (“VGI”), Viking Global Performance LLC, a Delaware limited liability company (“VGP”), Viking Global Equities LP, a Delaware limited partnership (“VGE”), Viking Global Equities II LP, a Delaware limited partnership (“VGEII”), VGE III Portfolio Ltd., a Cayman Islands exempted company (“VGEIII”), Viking Long Fund GP LLC, a Delaware limited liability company (“VLFGP”), Viking Long Fund Master Ltd., a Cayman Islands exempted company (“VLFM”), Viking Global Opportunities GP LLC, a Delaware limited liability company (“Opportunities GP”), Viking Global Opportunities Portfolio GP LLC, a Delaware limited liability company (“Opportunities Portfolio GP”), Viking Global Opportunities Illiquid Investments Sub-Master LP, a Cayman Islands exempted limited partnership (“Opportunities Fund”, and, together with VGE, VGEII, VGEIII and VLFM, the “Funds”), O. Andreas Halvorsen, a citizen of Norway, David C. Ott, a citizen of the United States, and Rose S. Shabet, a citizen of the United States (each, a “Reporting Person”, and, collectively, the “Reporting Persons”).

The Reporting Persons have entered into a joint filing agreement, dated as of July 5, 2017, a copy of which is filed herewith as Exhibit 99.1.

(b) The business address of each of the Reporting Persons is 55 Railroad Avenue, Greenwich, Connecticut 06830.

(c) The principal business of VGI is to provide managerial services to related entities engaged in making or recommending investments in securities of public and private companies.

The principal business of each of VGP, VLFGP, Opportunities GP and Opportunities Portfolio GP is to serve as the general partner or investment manager of related entities engaged in making or recommending investments in securities of public and private companies.

The principal business of each of the Funds is to engage in making investments in securities of public and private companies.

The present principal occupation of O. Andreas Halvorsen is Chief Executive Officer of VGI. The present principal occupation of David C. Ott is Advisory Director of VGI. The present principal occupation of Rose S. Shabet is Chief Operating Officer of VGI.

(d), (e) During the last five years, none of the Reporting Persons (i) has been convicted in any criminal proceeding (excluding traffic violations or similar misdemeanors) or (ii) was a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Item 3. Source and Amount of Funds or Other Consideration

This Amendment amends and restates the first paragraph of Item 3 of the Original Schedule 13D in its entirety as set forth below:

“The Reporting Persons do not directly own any Common Shares. The Reporting Persons (other than Ms. Shabet) acquired Roivant Sciences Ltd. (“Roivant”) common shares (the “Roivant Common Shares”) on December 8, 2015 pursuant to share purchase agreements using capital invested in the Funds by their investors. Roivant directly owns the 16,013,540 Common Shares reported herein. Ms. Shabet became an Executive Committee Member on July 1, 2017.”

Page 15 of 18 Pages

Item 4. Purpose of Transaction

This Amendment amends the Original Schedule 13D to add the following paragraph immediately after the first paragraph of Item 4 of the Original Schedule 13D:

“As of July 1, 2017, Rose S. Shabet became an Executive Committee Member of Viking Global Partners LLC (the general partner of VGI), VGP, VLFGP and Opportunities GP.”

Item 5. Interest in Securities of the Issuer

This Amendment amends and restates the twelfth and thirteenth paragraphs of Items 5(a)-(b) of the Original Schedule 13D in their entirety as set forth below:

“Mr. Halvorsen, Mr. Ott and Ms. Shabet, as Executive Committee Members of Viking Global Partners LLC (the general partner of VGI), VGP, VLFGP and Opportunities GP, have shared authority to direct the voting and disposition of investments beneficially owned by VGI, VGP, VLFGP and Opportunities GP. Accordingly, each of Mr. Halvorsen, Mr. Ott and Ms. Shabet may be deemed to have beneficial ownership over any Common Shares deemed beneficially owned by VGI, VGP, VLFGP and Opportunities GP.

The percentage of outstanding Common Shares of the Issuer that may be deemed to be beneficially owned by each Reporting Person is set forth on Line 13 of such Reporting Person’s cover sheet. Such percentage was calculated for each Reporting Person based on an aggregate of 55,024,557 Common Shares issued and outstanding as of April 30, 2017, reported on the Issuer’s Quarterly Report on Form 10-Q for the period ended March 31, 2017, filed with the SEC on May 4, 2017.”

Item 6. Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer

This Amendment amends and restates Item 6 of the Original Schedule 13D in its entirety as set forth below:

“Except as disclosed herein and the Joint Filing Agreement attached as Exhibit 99.1 hereto, there are no contracts, arrangements, understandings or relationships (legal or otherwise) among the Reporting Persons or with any other person with respect to any securities of the Issuer.”

Item 7. Material to Be Filed as Exhibits

This Amendment amends and restates Item 7 of the Original Schedule 13D in its entirety as set forth below:

“Exhibit 99.1 Joint Filing Agreement, dated as of July 5, 2017, among the Reporting Persons.”

Page 16 of 18 Pages

SIGNATURE

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

Dated: July 5, 2017



	By:/s/ O. Andreas Halvorsen
	By: O. Andreas Halvorsen - individually and as an Executive Committee Member of VIKING GLOBAL PERFORMANCE LLC, on behalf of itself and VIKING GLOBAL EQUITIES LP, VIKING GLOBAL EQUITIES II LP and VGE III PORTFOLIO LTD., and as an Executive Committee Member of Viking Global Partners LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING LONG FUND GP LLC, on behalf of itself and VIKING LONG FUND MASTER LTD., and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP

	By: /s/ David C. Ott
	By: David C. Ott - individually and as an Executive Committee Member of VIKING GLOBAL PERFORMANCE LLC, on behalf of itself and VIKING GLOBAL EQUITIES LP, VIKING GLOBAL EQUITIES II LP and VGE III PORTFOLIO LTD., and as an Executive Committee Member of Viking Global Partners LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as Executive Committee Member of VIKING LONG FUND GP LLC, on behalf of itself and VIKING LONG FUND MASTER LTD., and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP

By: /s/ Rose S. Shabet

By: Rose S. Shabet - individually and as an Executive Committee Member of VIKING GLOBAL PERFORMANCE LLC, on behalf of itself and VIKING GLOBAL EQUITIES LP, VIKING GLOBAL EQUITIES II LP and VGE III PORTFOLIO LTD., and as an Executive Committee Member of Viking Global Partners LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING LONG FUND GP LLC, on behalf of itself and VIKING LONG FUND MASTER LTD., and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP

Page 17 of 18 Pages

INDEX TO EXHIBITS

Exhibit 99.1 Joint Filing Agreement, dated as of July 5, 2017, among the Reporting Persons.

AGREEMENT OF JOINT FILING

This joint filing agreement (this “Agreement”) is made and entered into as of this 5th day of July, 2017, by and among Viking Global Investors LP, Viking Global Performance LLC, Viking Global Equities LP, Viking Global Equities II LP, VGE III Portfolio Ltd., Viking Long Fund GP LLC, Viking Long Fund Master Ltd., Viking Global Opportunities GP LLC, Viking Global Opportunities Portfolio GP LLC, Viking Global Opportunities Illiquid Investments Sub-Master LP, O. Andreas Halvorsen, David C. Ott and Rose S. Shabet.

The parties to this Agreement hereby agree to jointly prepare and file a Schedule 13D with respect to Arbutus Biopharma Corporation, as well as any amendments thereto, pursuant to the Securities Exchange Act of 1934, as amended.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the date first set forth above.

Dated: July 5, 2017



	By:/s/ O. Andreas Halvorsen
	By: O. Andreas Halvorsen - individually and as an Executive Committee Member of VIKING GLOBAL PERFORMANCE LLC, on behalf of itself and VIKING GLOBAL EQUITIES LP, VIKING GLOBAL EQUITIES II LP and VGE III PORTFOLIO LTD., and as an Executive Committee Member of Viking Global Partners LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING LONG FUND GP LLC, on behalf of itself and VIKING LONG FUND MASTER LTD., and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP

	By: /s/ David C. Ott
	By: David C. Ott - individually and as an Executive Committee Member of VIKING GLOBAL PERFORMANCE LLC, on behalf of itself and VIKING GLOBAL EQUITIES LP, VIKING GLOBAL EQUITIES II LP and VGE III PORTFOLIO LTD., and as an Executive Committee Member of Viking Global Partners LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as Executive Committee Member of VIKING LONG FUND GP LLC, on behalf of itself and VIKING LONG FUND MASTER LTD., and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP

By: /s/ Rose S. Shabet

Page 18 of 18 Pages