13G Filing: Perceptive Advisors and CytomX Therapeutics Inc (CTMX)

Page 4 of 8 – SEC Filing


CUSIP No. 23284F 10 5

  1 

NAMES OF
REPORTING PERSONS

Perceptive Life Sciences Master Fund, Ltd.

  2

CHECK THE APPROPRIATE BOX IF A MEMBER
OF A GROUP (SEE INSTRUCTIONS)

(a)  ☐        (b)  ☐

  3

SEC USE ONLY

  4

CITIZENSHIP OR PLACE OF
ORGANIZATION

Cayman Islands

NUMBER OF

SHARES

BENEFICIALLY

EACH

REPORTING

PERSON

WITH:

SOLE VOTING POWER

0

6

SHARED VOTING POWER

2,165,381

7

SOLE DISPOSITIVE POWER

0

8

SHARED DISPOSITIVE POWER

2,165,381

  9

AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

2,165,381

10

CHECK BOX IF THE AGGREGATE AMOUNT IN
ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)  ☐

11

PERCENT OF CLASS REPRESENTED BY AMOUNT
IN ROW 9

5.6%

12

TYPE OF REPORTING PERSON (SEE
INSTRUCTIONS)

CO

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