Myriad Genetics gets 10.4% BlackRock stake

BlackRock Portfolio Management LLC reports beneficial ownership of 10.4% of Myriad Genetics’ common stock with sole voting and dispositive power over most shares.

Rhea-AI Filing Summary

MYRIAD GENETICS INC (MYGN) is reported to have 9,900,937 shares of its common stock beneficially owned by BlackRock Portfolio Management LLC and certain related business units of BlackRock, Inc., representing 10.4% of the class as of the filing.

BlackRock Portfolio Management LLC reports sole power to vote 8,751,792 shares and sole power to dispose of 9,900,937 shares, with no shared voting or dispositive power. Various underlying clients have rights to dividends or sale proceeds, but no single client holds more than five percent of Myriad Genetics’ outstanding common shares.

Key Figures

Shares beneficially owned: 9,900,937 shares Percent of class: 10.4% Sole voting power: 8,751,792 shares +3 more

6 metrics

Shares beneficially owned 9,900,937 shares Common stock of Myriad Genetics Inc reported by BlackRock Portfolio Management LLC

Percent of class 10.4% Portion of Myriad Genetics Inc common stock class beneficially owned

Sole voting power 8,751,792 shares Shares over which BlackRock Portfolio Management LLC has sole power to vote

Shared voting power 0 shares Shares over which BlackRock Portfolio Management LLC has shared power to vote

Sole dispositive power 9,900,937 shares Shares over which BlackRock Portfolio Management LLC has sole power to dispose

Shared dispositive power 0 shares Shares over which BlackRock Portfolio Management LLC has shared power to dispose

Key Terms

beneficially owned, Sole Voting Power, Sole Dispositive Power, percent of class, +1 more

5 terms

beneficially owned regulatory

"In accordance with SEC Release No. 34-39538 ... reflects the securities beneficially owned"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Sole Voting Power financial

"5 | Sole Voting Power 8,751,792.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Sole Dispositive Power financial

"7 | Sole Dispositive Power 9,900,937.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

percent of class financial

"(b) | Percent of class: 10.4 %"

Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.

Investment Company Act of 1940 regulatory

"A listing of the shareholders of an investment company registered under the Investment Company Act of 1940"

A U.S. federal law that sets the rulebook for pooled investment vehicles such as mutual funds, exchange-traded funds and similar money managers, requiring them to register with regulators, disclose holdings and fees, limit conflicts of interest, and follow governance standards. It matters to investors because these protections and transparency rules act like a referee and scoreboard, helping people compare funds, trust that managers follow fair practices, and spot hidden costs or risks.

FAQ

How much of MYGN’s common stock does BlackRock Portfolio Management LLC beneficially own?

BlackRock Portfolio Management LLC reports beneficial ownership of 9,900,937 shares of MYRIAD GENETICS INC common stock, representing 10.4% of the outstanding class, with all of these shares subject to its sole dispositive power.

What voting power does BlackRock Portfolio Management LLC report over MYGN shares?

BlackRock Portfolio Management LLC reports sole voting power over 8,751,792 shares of MYRIAD GENETICS INC common stock and no shared voting power. It also reports no shared dispositive power over the shares.

Does any single client of BlackRock hold more than 5% of MYGN shares?

No. The filing states that various persons have the right to receive dividends or sale proceeds from MYRIAD GENETICS INC common stock, but no one person’s interest exceeds five percent of the total outstanding common shares.

Who is the reporting person in this Schedule 13G for MYGN?

The reporting person is BlackRock Portfolio Management LLC, a Delaware entity, filing on securities beneficially owned or deemed beneficially owned by certain business units of BlackRock, Inc. and its subsidiaries and affiliates, as described in the ownership disclosure.

What type of security in MYGN is covered in this Schedule 13G?

The Schedule 13G covers Common Stock of MYRIAD GENETICS INC, identified with CUSIP number 62855J104, as specified in the class-of-securities and CUSIP sections of the ownership disclosure.

Who signed the Schedule 13G related to MYGN on behalf of BlackRock Portfolio Management LLC?

The Schedule 13G was signed by Spencer Fleming, identified with the title Managing Director, and dated September 4, 2026, as shown in the signature block of the ownership disclosure.

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

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Available on EDGAR 09/04/2026 - 12:58 PM Accepted by SEC EDGAR 09/04/2026 - 12:57 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

MYRIAD GENETICS INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

62855J104

(CUSIP Number)

08/31/2026

(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): 62855J104

1

Names of Reporting Persons

BlackRock Portfolio Management 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 8,751,792.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 9,900,937.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,900,937.00

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)

10.4 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MYRIAD GENETICS INC
(b)	Address of issuer's principal executive offices: 322 NORTH 2200 WEST SALT LAKE CITY UT 84116
Item 2.
(a)	Name of person filing: BlackRock Portfolio Management LLC In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock Portfolio Management LLC, 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 62855J104
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: 9900937
(b)	Percent of class: 10.4 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 8751792
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 9900937
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
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. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of MYRIAD GENETICS INC. No one person's interest in the common stock of MYRIAD GENETICS INC is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
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 acquired and are held in the ordinary course of business and 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.

BlackRock Portfolio Management LLC

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	09/04/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7