13G Filing: Viking Global and Editas Medicine, Inc. (EDIT)

Schedule 13G PAGE 16 of 20

CUSIP No. 28106W103

(g) [ ] Parent Holding Company, in accordance with Rule 13d-
1(b)(ii)(G)

(h) [ ] Savings Associations as defined in Section 3(b) of the
Federal Deposit Insurance Act

(i) [ ] Church Plan that is excluded from the definition of an
investment company under Section 3(c)(14) of the
Investment Company Act of 1940

(j) [ ] A non-U.S. institution in accordance with
Rule 240.13d-1(b)(1)(ii)(J)

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
If filing as a non-U.S. institution in accordance with
Rule 240.13d-1(b)(1)(ii)(J), please specify
the type of institution:

ITEM 4. OWNERSHIP.

A. VGI
(a) Amount beneficially owned: 2,729,808
(b) Percent of class: 7.5%
The percentages used herein and in this Item 4 are calculated based
upon the Company’s Prospectus on Form 424B1 filed on February 3, 2016,
and press release issued on February 8, 2016, which state that as of
February 8, 2016 there were 36,584,538 shares of Common Stock
outstanding.
(c) Number of shares as to which such person has:
(i) sole power to vote or to direct the vote
0
(ii) shared power to vote or to direct the vote
2,729,808
(iii) sole power to dispose or to direct the disposition
of 0
(iv) shared power to dispose or to direct the disposition
of 2,729,808

VGI provides managerial services to VGE, VGEII, VGEIII, VLFM
and Opportunities Fund. VGI has the authority to dispose of and vote
the shares of Common Stock.

Based on Rule 13d-3 of the Securities Exchange Act of 1934,
as amended (the “Act”), VGI may be deemed to beneficially
own the shares of Common Stock directly held by VGE, VGEII,
VGEIII, VLFM and Opportunities Fund. VGI does not directly own
any shares of Common Stock.