SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* VIKING GLOBAL INVESTORS LP (Last) (First) (Middle) 55 RAILROAD AVENUE (Street) GREENWICH CT 06830 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Arbutus Biopharma Corp [ ABUS ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 01/12/2018
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A Participating Convertible Preferred Shares	$7.13(1)(2)	01/12/2018		P		664,000(1)(2)		(1)(2)	10/16/2021(1)(2)	Common shares, no par value	13,025,536(1)(2)	$100(1)(2)	1,164,000	I	See Footnotes(3)(4)(5)(6)

1. Name and Address of Reporting Person* VIKING GLOBAL INVESTORS LP (Last) (First) (Middle) 55 RAILROAD AVENUE (Street) GREENWICH CT 06830 (City) (State) (Zip)

1. Name and Address of Reporting Person* Viking Global Opportunities Illiquid Investments Sub-Master LP (Last) (First) (Middle) 55 RAILROAD AVENUE (Street) GREENWICH CT 06830 (City) (State) (Zip)

1. Name and Address of Reporting Person* Viking Global Opportunities Portfolio GP LLC (Last) (First) (Middle) 55 RAILROAD AVENUE (Street) GREENWICH CT 06830 (City) (State) (Zip)

1. Name and Address of Reporting Person* Viking Global Opportunities GP LLC (Last) (First) (Middle) 55 RAILROAD AVENUE (Street) GREENWICH CT 06830 (City) (State) (Zip)

1. Name and Address of Reporting Person* HALVORSEN OLE ANDREAS (Last) (First) (Middle) 55 RAILROAD AVENUE (Street) GREENWICH CT 06830 (City) (State) (Zip)

1. Name and Address of Reporting Person* Ott David C. (Last) (First) (Middle) 55 RAILROAD AVENUE (Street) GREENWICH CT 06830 (City) (State) (Zip)

1. Name and Address of Reporting Person* Shabet Rose Sharon (Last) (First) (Middle) 55 RAILROAD AVENUE (Street) GREENWICH CT 06830 (City) (State) (Zip)

Explanation of Responses:

1. Represents series A participating convertible preferred shares (the "Preferred Shares") purchased by Roivant Sciences Ltd. ("Roivant") for $100.00 per Preferred Share (the "Purchase Price"), which price is subject to increase to reflect the addition of any unpaid participating cash dividends and unpaid participating in-kind dividends.

2. Subject to earlier conversion at Roivant's option upon the occurrence of certain limited events set forth in the amendment to the Notice of Articles and the Articles of the Issuer (the "Preferred Shares Articles Amendment"), the Preferred Shares mandatorily convert on October 16, 2021, to the extent not already converted, into (i) unpaid accrued participating in-kind dividends an cash for any unpaid accrued cash dividends, as set forth in the Preferred Shares Article Amendment, and (ii) common shares of the Issuer, no par value (the "Common Shares"), which is determined by dividing (a) the Purchase Price, plus an amount equal to 8.75% of the Purchase Price per year, compounded annually, by (b) the conversion price in effect at the time of conversion. Each Preferred Share is initially convertible based on a conversion price of $7.13, subject to adjustment for certain distributions and other transactions by the Issuer on or with respect to the Common Shares.

3. O. Andreas Halvorsen, David C. Ott and Rose S. Shabet are Executive Committee members of certain management entities, including Viking Global Partners LLC, the general partner of Viking Global Investors LP ("VGI"), Viking Global Performance LLC ("VGP"), Viking Long Fund GP LLC ("VLFGP") and Viking Global Opportunities GP LLC ("Opportunities GP"), the sole owner of Viking Global Opportunities Portfolio GP LLC ("Opportunities Portfolio GP"). VGI provides managerial services to various investment funds, including Viking Global Equities LP ("VGE"), Viking Global Equities II LP ("VGE II"), VGE III Portfolio Ltd. ("VGE III"), Viking Long Fund Master Ltd. ("VLFM") and Viking Global Opportunities Illiquid Investments Sub-Master LP ("Opportunities Fund", and together with VGE, VGE II, VGE III and VLFM, the "Funds" and the Funds together with VGI, VGP, VLFGP, Opportunities GP, Opportunities Portfolio GP, O. Andreas Halvorsen, David C. Ott and Rose S. Shabet, the "Reporting Persons").

4. The Reporting Persons do not directly own any equity securities of the Issuer. The Reporting Persons acquired Roivant common shares on December 8, 2015. Roivant directly holds the 1,164,000 Preferred Shares reported herein. Due to certain governance arrangements set forth in Roivant's bye-laws, as of the appointment of an independent director (within the meaning of that term under Roivant's bye-laws) to Roivant's board of directors effective July 8, 2016, the Reporting Persons may be deemed to have beneficial ownership over the Preferred Shares held by Roivant.

5. VGP is the general partner of VGE and VGE II and the investment manager of VGE III. VLFGP serves as the investment manager of VLFM. Opportunities GP serves as the sole member of Opportunities Portfolio GP. Opportunities Portfolio GP serves as the general partner of Opportunities Fund.

6. The Reporting Persons disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.

Remarks:

(7) The Reporting Persons are jointly filing this Form 4 pursuant to Rule 16a-3(j) under the Exchange Act. (8) Each of O. Andreas Halvorsen, David C. Ott and Rose S. Shabet is signing individually 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 GLOBAL OPPORTUNITIES GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP. (9) Because no more than 10 reporting persons can file any one Form 4 through the Securities and Exchange Commission's EDGAR system, VGP, VGE, VGE II, VGE III, VLFGP and VLFM have jointly filed with the Reporting Persons on a separate Form 4 filing submitted on the same day hereof.

	/s/ O. ANDREAS HALVORSEN (7)(8)	01/16/2018
	/s/ DAVID C. OTT (7)(8)	01/16/2018
	/s/ ROSE SHABET (7)(8)	01/16/2018
	** Signature of Reporting Person	Date
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