UNITED STATESSECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

SCHEDULE 13G/A

Under the Securities Exchange Act of 1934

(Amendment No. 1)

CareDx, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

14167L103 (CUSIP Number)

July 3, 2017 

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐Rule 13d-1(b)

ýRule 13d-1(c)

☐Rule 13d-1(d)

* 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 in 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.14167L10313G/A

1	NAMES OF REPORTING PERSONS FastPartner AB, Company registration number 556230-7867
	I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
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
	Sweden
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5	SOLE VOTING POWER
			2,130,996
		6	SHARED VOTING POWER
		7	SOLE DISPOSITIVE POWER
			2,130,996
		8	SHARED DISPOSITIVE POWER
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	2,130,996
10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
	☐
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
	9.3%
12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
	CO

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Item 1.

(a) Name of Issuer:

CareDx, Inc.

(b) Address of Issuer’s Principal Executive Offices:

3260 Bayshore Boulevard

Brisbane, California 94005

Item 2.

(a) Name of Person Filing:

FastPartner AB

(b) Address of Principal Business Office or, if none, Residence:

Box 556 25

102 14 Stockholm

Sweden

(c) Citizenship:

Sweden

(d) Title of Class of Securities:

Common Stock, par value $0.001 per share

(e) CUSIP No.:

14167L103

Item 3. If this statement is filed pursuant to §§240.13d–1(b), or 240.13d–2(b) or (c), check whether the person filing is a:

(a) ☐ Broker or dealer registered under section 15 of the Act;

(b) ☐ Bank as defined in section 3(a)(6) of the Act;

(c) ☐ Insurance company as defined in section 3(a)(19) of the Act;

(d) ☐ Investment company registered under section 8 of the Investment Company Act of 1940;

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(e) ☐ An investment adviser in accordance with §§240.13d–1(b)(1)(ii)(E);

(f) ☐ An employee benefit plan or endowment fund in accordance with §§240.13d–1(b)(1)(ii)(F);

(g) ☐ A parent holding company or control person in accordance with §240.13d–1(b)(1)(ii)(G);

(h) ☐ A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;

(i) ☐ A 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 §240.13d–1(b)(1)(ii)(J).

(k) ☐ Group, in accordance with §240.3d–1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with §240.13d–1(b)(1)(ii)(J), please specify the type of institution:

If this statement is filed pursuant to Rule 13d–1(c), check this box.  ☒

Item 4. Ownership

(a) Amount beneficially owned:

FastPartner AB may be deemed the beneficial owner of 2,130,996 shares of Common Stock that it holds directly. This amount consists of (i) 1,751,046 shares of Common Stock and (ii) 379,950 shares of Common Stock receivable by FastPartner AB upon exercise of presently held warrants.

(b) Percent of class:

FastPartner AB:  9.3%

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Calculation of percentage based on 22,823,510 shares of the Issuer's Common Stock, which is comprised of (i) 21,421,016 outstanding shares of the Issuer's Common stock as reported on the Issuer's Form 10-Q filed on June 9, 2017, plus (ii) 1,022,544 shares of the Issuer's Common Stock issued on July 3, 2017 as reported on the Issuer's Form 8-K filed on July 3, 2017 plus (iii) an additional 379,950 shares of the Issuer's Common Stock that can be purchased upon exercise of outstanding warrants to purchase shares of the Issuer's Common Stock held by the Reporting Person.

(c) Number of shares as to which the person has:

(i) Sole power to vote or to direct the vote:

2,130,996

(ii) Shared power to vote or to direct the vote:

0

(iii) Sole power to dispose or to direct the disposition of:

2,130,996

(iv) Shared power to dispose or to direct the disposition of

0

Item 5. Ownership of Five Percent or Less of a Class.

Inapplicable.

Item 6. Ownership of More than Five Percent on Behalf of Another Person.

Inapplicable.

Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

Inapplicable.

Item 8. Identification and Classification of Members of the Group.

Inapplicable.

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Item 9. Notice of Dissolution of Group.

Inapplicable.

Item 10. Certifications.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

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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 7, 2017

FastPartner AB
By:	/s/ Daniel Gerlach
	Name:	Daniel Gerlach
	Title:	Cheif Financial Officer

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