Frazier Life Sciences reports 0% Mereo BioPharma (MREO) stake

Rhea-AI Filing Summary

Mereo BioPharma Group plc received an amended Schedule 13G/A (Amendment No. 2) from several Frazier Life Sciences investment entities and their related managing members. The filing states that each reporting person beneficially owns 0 ordinary shares, or 0.0% of the class, of Mereo’s ordinary shares represented by American Depositary Shares as of 12/31/2025. The group also certifies that the securities were not acquired and are not held for the purpose of changing or influencing control of the company.

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Accepted by SEC EDGAR 02/13/2026 - 05:35 PM Learn about SEC filing dates

FAQ

What does the latest Schedule 13G/A for Mereo BioPharma (MREO) report?

The amended Schedule 13G/A reports that several Frazier Life Sciences entities now beneficially own 0 ordinary shares, or 0.0% of Mereo BioPharma’s outstanding class, as of December 31, 2025, indicating they no longer report a meaningful ownership position.

Who are the reporting persons in Mereo BioPharma (MREO)’s Schedule 13G/A?

The reporting persons are multiple Frazier Life Sciences entities, including Frazier Life Sciences Public Fund, Frazier Life Sciences X and XI funds, related FHMLS entities, and individuals James N. Topper and Patrick J. Heron, all collectively filing as a group of reporting persons.

What ownership percentage do Frazier Life Sciences entities now report in Mereo BioPharma (MREO)?

Each reporting person discloses beneficial ownership of 0.00 shares, representing 0.0% of Mereo BioPharma’s ordinary shares represented by ADSs, showing they report no current beneficial ownership position in the company’s equity securities under Section 13 rules.

What class of securities is covered in this Mereo BioPharma (MREO) Schedule 13G/A?

The filing covers Mereo BioPharma’s ordinary shares with a nominal value of EUR 0.003 per share, represented by American Depositary Shares. The CUSIP number for these ADSs is 589492107, as specified in the ownership disclosure section.

Do the Frazier Life Sciences reporting persons seek control of Mereo BioPharma (MREO)?

The reporting persons certify that the securities referenced were not acquired and are not held for the purpose of changing or influencing control of Mereo BioPharma, and are not part of any transaction intended to have that control-related effect under SEC rules.

What is the relevant date for the ownership reported in Mereo BioPharma (MREO)’s Schedule 13G/A?

The filing states that the date of the event requiring the statement is December 31, 2025. All reported ownership figures, including the 0.0% beneficial ownership, are tied to this reference date for regulatory reporting purposes.

Who signed the Schedule 13G/A related to Mereo BioPharma (MREO) on behalf of the reporting persons?

Jennifer Martin signed the filing in multiple capacities, including as CFO of various FHMLS and FHMLSP entities and as attorney-in-fact for James N. Topper and Patrick J. Heron, with signatures dated February 13, 2026, for each reporting person listed.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Mereo BioPharma Group plc

(Name of Issuer)

Ordinary Shares, nominal value EURO0.003 per share, represented by American Depository Shares

(Title of Class of Securities)

589492107

(CUSIP Number)

12/31/2025

(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)

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

Frazier Life Sciences Public Fund, L.P.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

FHMLSP, L.P.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

FHMLSP, L.L.C.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

Frazier Life Sciences X, L.P.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

FHMLS X, L.P.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

FHMLS X, L.L.C.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

Frazier Life Sciences XI, L.P.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

FHMLS XI, L.P.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

FHMLS XI, L.L.C.

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

James N. Topper

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 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 589492107

1

Names of Reporting Persons

Patrick J. Heron

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 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Mereo BioPharma Group plc
(b)	Address of issuer's principal executive offices: 4th Floor, One Cavendish Place, London, X0, W1G 0QF.
Item 2.
(a)	Name of person filing: The entities and persons filing this statement (collectively, the "Reporting Persons") are: Frazier Life Sciences Public Fund, L.P. ("FLSPF") FHMLSP, L.P. FHMLSP, L.L.C. Frazier Life Sciences X, L.P. ("FLS X") FHMLS X, L.P. FHMLS X, L.L.C. Frazier Life Sciences XI, L.P. ("FLS XI") FHMLS XI, L.P. FHMLS XI, L.L.C. James N. Topper ("Topper") Patrick J. Heron ("Heron" and together with Topper, the "Members")
(b)	Address or principal business office or, if none, residence: The address of the principal place of business for each of the Reporting Persons is: c/o Frazier Life Sciences Management, L.P. 1001 Page Mill Rd, Building 4, Suite B Palo Alto, CA 94304
(c)	Citizenship: The information contained in row 4 of each Reporting Person's cover page to this Statement is incorporated by reference.
(d)	Title of class of securities: Ordinary Shares, nominal value EURO0.003 per share, represented by American Depository Shares
(e)	CUSIP No.: 589492107
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: The information contained in row 9 of each Reporting Person's cover page to this Statement (including the footnotes thereto) is incorporated by reference. Except as specifically stated herein, the filing of this Statement shall not be construed as an admission that any Reporting Person or any of the foregoing is, for the purposes of Section 13(d) and/or Section 13(g) of the Act or otherwise, the beneficial owner of any securities covered by this Statement or a member of a "group" with any other person.
(b)	Percent of class: The information contained in row 11 of each Reporting Person's cover page to this Schedule 13G (including the footnotes thereto) is incorporated by reference.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information contained in row 5 of each Reporting Person's cover page to this Schedule 13G (including the footnotes thereto) is incorporated by reference.
	(ii) Shared power to vote or to direct the vote: The information contained in row 6 of each Reporting Person's cover page to this Schedule 13G (including the footnotes thereto) is incorporated by reference.
	(iii) Sole power to dispose or to direct the disposition of: The information contained in row 7 of each Reporting Person's cover page to this Schedule 13G (including the footnotes thereto) is incorporated by reference.
	(iv) Shared power to dispose or to direct the disposition of: The information contained in row 8 of each Reporting Person's cover page to this Schedule 13G (including the footnotes thereto) is incorporated by reference.
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.
	Not Applicable
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.

Frazier Life Sciences Public Fund, L.P.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P., GP of Frazier Life Sciences Public Fund, L.P.
Date:	02/13/2026

FHMLSP, L.P.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, CFO of FHMLSP, L.L.C., GP of FHMLSP, L.P.
Date:	02/13/2026

FHMLSP, L.L.C.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, CFO of FHMLSP, L.L.C.
Date:	02/13/2026

Frazier Life Sciences X, L.P.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P., GP of Frazier Life Sciences X, L.P.
Date:	02/13/2026

FHMLS X, L.P.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, CFO of FHMLS X, L.L.C., GP of FHMLS X, L.P.
Date:	02/13/2026

FHMLS X, L.L.C.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, CFO of FHMLS X, L.L.C.
Date:	02/13/2026

Frazier Life Sciences XI, L.P.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, CFO of FHMLS XI, L.L.C., GP of FHMLS XI, L.P., GP of Frazier Life Sciences XI, L.P.
Date:	02/13/2026

FHMLS XI, L.P.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, CFO of FHMLS XI, L.L.C., GP of FHMLS XI, L.P.
Date:	02/13/2026

FHMLS XI, L.L.C.

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, CFO of FHMLS XI, L.L.C.
Date:	02/13/2026

James N. Topper

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, Attorney-in-Fact for James N. Topper, pursuant to a Power of Attorney, a copy of which was filed with the SEC on January 27, 2026
Date:	02/13/2026

Patrick J. Heron

Signature:	/s/ Jennifer Martin
Name/Title:	By Jennifer Martin, Attorney-in-Fact for Patrick Heron, pursuant to a Power of Attorney, a copy of which was filed with the SEC on January 27, 2026
Date:	02/13/2026

Exhibit Information

Exhibit 99.1 Joint Filing Agreement