Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Midroc Invest AB
 2. Date of Event Requiring Statement (Month/Day/Year)
07/03/2017		 3. Issuer Name and Ticker or Trading Symbol
CareDx, Inc. [CDNA]
(Last)
(First)
(Middle)
P.O. BOX 3002		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SOLNA, V7 SE-169 03		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 1,967,436
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Warrant to Purchase Common Stock   (1)   (1) Common Stock 427,068 (2) $ (1) D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Midroc Invest AB
P.O. BOX 3002
SOLNA, V7 SE-169 03		        

Signatures

/s/ G?ran Linder 07/07/2017
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The Warrants may be exercised by the holder at any time on or after June 16, 2016 and expire as of June 16, 2023. The Warrants have an initial exercise price of $4.98 per share of Common Stock, subject to certain adjustments.
(2) The holder may not exercise the Warrants to the extent that after giving effect to such exercise, such holder would beneficially own in excess of a Maximum Percentage of shares of Common Stock outstanding immediately after giving effect to such exercise. As of July 7, 2017, the Maximum Percentage was 4.99%.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

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