CareDx (CDNA): Neil Gagnon and Gagnon entities report 4.4% ownership stake

Rhea-AI Filing Summary

Neil Gagnon and affiliated entities report significant ownership in CareDx, Inc. common stock. Neil Gagnon is reported as beneficially owning 2,293,464 shares of CareDx common stock, representing 4.4% of the class. Gagnon Securities LLC reports beneficial ownership of 1,629,867 shares (3.2%), and Gagnon Advisors, LLC reports 408,837 shares (0.8%).

Neil Gagnon has sole voting and dispositive power over 149,317 shares and shared voting power over 1,946,659 shares, with shared dispositive power over 2,144,147 shares. The filing states that Gagnon Securities LLC and Gagnon Advisors, LLC, along with Mr. Gagnon, may be deemed to share voting and dispositive power over shares held in customer accounts and a private investment fund, while expressly disclaiming beneficial ownership of those securities.

Key Figures

Neil Gagnon beneficial ownership: 2,293,464 shares Neil Gagnon percent of class: 4.4 % Gagnon Securities LLC beneficial ownership: 1,629,867 shares +5 more

8 metrics

Neil Gagnon beneficial ownership 2,293,464 shares Beneficially owned CareDx common stock; 4.4% of class

Neil Gagnon percent of class 4.4 % Percent of CareDx common stock class beneficially owned

Gagnon Securities LLC beneficial ownership 1,629,867 shares CareDx shares beneficially owned; 3.2% of class

Gagnon Securities LLC percent of class 3.2 % Percent of CareDx common stock class beneficially owned

Gagnon Advisors, LLC beneficial ownership 408,837 shares CareDx shares beneficially owned; 0.8% of class

Gagnon Advisors, LLC percent of class 0.8 % Percent of CareDx common stock class beneficially owned

Neil Gagnon sole voting power 149,317 shares Shares of CareDx common stock with sole voting and dispositive power

Neil Gagnon shared voting power 1,946,659 shares Shares of CareDx common stock with shared voting power

Key Terms

beneficial ownership, shared voting power, dispositive power, Investment Advisers Act of 1940, +1 more

5 terms

beneficial ownership financial

"Item 4. | Ownership (a) | Amount beneficially owned: Gagnon Securities LLC 1,629,867"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

shared voting power financial

"6 | Shared Voting Power 1,440,216.00 7 | Sole Dispositive Power"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

dispositive power financial

"8 | Shared Dispositive Power 1,629,867.00 9 1,629,867.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Investment Advisers Act of 1940 regulatory

"an investment adviser registered with the U.S. ("SEC") under the Investment Advisers Act of 1940"

A U.S. federal law that sets rules for people and firms who give investment advice, requiring them to register with regulators, be honest about conflicts, keep records, and follow basic standards of care. It matters to investors because those rules act like licensing and consumer protections — similar to having safety standards for a mechanic — helping ensure advisers act in clients’ financial interests and reducing the risk of fraud or misuse of funds.

registered broker-dealer regulatory

"and a registered broker-dealer, in its role as investment manager"

A registered broker-dealer is a firm licensed by regulators to legally buy and sell stocks, bonds and other securities for clients or on its own account; think of it as a regulated marketplace intermediary or licensed shop for investments. It matters to investors because registration brings required oversight, record-keeping and customer protections that reduce fraud risk, provide access to public markets and ensure trades follow rules for fairness and transparency.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/07/2026 - 05:50 PM Accepted by SEC EDGAR 08/07/2026 - 05:49 PM Learn about SEC filing dates

FAQ

How many CareDx (CDNA) shares does Neil Gagnon beneficially own?

Neil Gagnon is reported as beneficially owning 2,293,464 shares of CareDx common stock, representing 4.4% of the outstanding class, including shares over which he has both sole and shared voting and dispositive power.

What percentage of CareDx (CDNA) is held by Gagnon Securities LLC?

Gagnon Securities LLC is reported as beneficially owning 1,629,867 shares of CareDx common stock, representing 3.2% of the class, with shared voting power over 1,440,216 shares and shared dispositive power over 1,629,867 shares.

What is Gagnon Advisors, LLC’s ownership in CareDx (CDNA)?

Gagnon Advisors, LLC is reported as beneficially owning 408,837 shares of CareDx common stock, equal to 0.8% of the class, with shared voting and shared dispositive power over all 408,837 shares through a private investment fund it manages.

Does Neil Gagnon have sole voting power over CareDx (CDNA) shares?

Neil Gagnon has sole voting and sole dispositive power over 149,317 shares of CareDx common stock. He also has shared voting power over 1,946,659 shares and shared dispositive power over 2,144,147 shares held through managed accounts and a private fund.

Do Gagnon entities claim beneficial ownership of client-held CareDx (CDNA) securities?

Gagnon Securities LLC, Gagnon Advisors, LLC and Neil Gagnon may be deemed to share power over certain CareDx shares, but they expressly disclaim beneficial ownership of all securities held in customer accounts and the private investment fund described.

Are Neil Gagnon and his entities over 5% owners of CareDx (CDNA)?

The filing reports Neil Gagnon at 4.4%, Gagnon Securities LLC at 3.2%, and Gagnon Advisors, LLC at 0.8% of CareDx common stock, each representing 5% or less of the class.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

CareDx, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

14167L103

(CUSIP Number)

07/31/2026

(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)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 14167L103

1

Names of Reporting Persons

Gagnon Securities LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,440,216.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,629,867.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,629,867.00

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)

3.2 %

12

Type of Reporting Person (See Instructions)

BD, IA

SCHEDULE 13G

CUSIP Number(s): 14167L103

1

Names of Reporting Persons

Gagnon Advisors, LLC

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 408,837.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 408,837.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

408,837.00

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)

0.8 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): 14167L103

1

Names of Reporting Persons

Neil Gagnon

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 149,317.00
6	Shared Voting Power 1,946,659.00
7	Sole Dispositive Power 149,317.00
8	Shared Dispositive Power 2,144,147.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,293,464.00

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)

4.4 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: CareDx, Inc.
(b)	Address of issuer's principal executive offices: 8000 Marina Blvd, 4th Floor, Brisbane, CA 94005
Item 2.
(a)	Name of person filing: Neil Gagnon has sole voting and dispositive power over 149,317 shares of the Issuer's common stock, par value $0.001 per share (the "Common Stock"). In addition, Mr. Gagnon has shared voting power over 1,946,659 shares of Common Stock and shared dispositive power over 2,144,147 shares of Common Stock. Mr. Gagnon is the Chief Executive Officer and principal owner of Gagnon Securities LLC ("GS"), an investment adviser registered with the U.S. Securities and Exchange Commission ("SEC") under the Investment Advisers Act of 1940, as amended (the "Advisers Act"), and a registered broker-dealer, in its role as investment manager to several customer accounts, foundations, partnerships and trusts (collectively, the "Accounts") to which it furnishes investment advice. GS and Mr. Gagnon may be deemed to share voting power with respect to 1,440,216 shares of Common Stock held in the Accounts and dispositive power with respect to 1,629,867 shares of Common Stock held in the Accounts. GS and Mr. Gagnon expressly disclaim beneficial ownership of all securities held in the Accounts. Mr. Gagnon is also the managing member of Gagnon Advisors, LLC ("Gagnon Advisors"), an investment adviser registered with the SEC under the Advisers Act. Mr. Gagnon and Gagnon Advisors, in its role as investment manager to Gagnon Investment Associates, LLC ("GIA"), a private investment fund, may be deemed to share voting and dispositive power with respect to the 408,837 shares of Common Stock held by GIA. Gagnon Advisors and Mr. Gagnon expressly disclaim beneficial ownership of all securities held by GIA.
(b)	Address or principal business office or, if none, residence: 1370 Ave. of Americas, 26th Floor, New York, NY 10019
(c)	Citizenship: Gagnon Securities LLC Delaware limited liability company Gagnon Advisors, LLC Delaware limited liability company Neil Gagnon USA
(d)	Title of class of securities: Common Stock
(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 (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(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 associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(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 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: Gagnon Securities LLC 1,629,867 Gagnon Advisors, LLC 408,837 Neil Gagnon 2,293,464
(b)	Percent of class: Gagnon Securities LLC 3.2% Gagnon Advisors, LLC 0.8% Neil Gagnon 4.4%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Gagnon Securities LLC 0 Gagnon Advisors, LLC 0 Neil Gagnon 149,317
	(ii) Shared power to vote or to direct the vote: Gagnon Securities LLC 1,440,216 Gagnon Advisors, LLC 408,837 Neil Gagnon 1,946,659
	(iii) Sole power to dispose or to direct the disposition of: Gagnon Securities LLC 0 Gagnon Advisors, LLC 0 Neil Gagnon 149,317
	(iv) Shared power to dispose or to direct the disposition of: Gagnon Securities LLC 1,629,867 Gagnon Advisors, LLC 408,837 Neil Gagnon 2,144,147
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Accounts described above in Item 2 have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, securities held in their respective accounts. To the knowledge of the Reporting Persons, the interest in any such account does not exceed 5% of the class of securities. Except to the extent described herein, the Reporting Person disclaims beneficial ownership of all such securities.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired 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, other than activities solely in connection with a nomination under § 240.14a-11.

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.

Gagnon Securities LLC

Signature:	/s/ Neil Gagnon
Name/Title:	Neil Gagnon/Chief Executive Officer
Date:	08/07/2026

Gagnon Advisors, LLC

Signature:	/s/ Neil Gagnon
Name/Title:	Neil Gagnon/Managing Member
Date:	08/07/2026

Neil Gagnon

Signature:	/s/ Neil Gagnon
Name/Title:	Neil Gagnon
Date:	08/07/2026