Yarrow Bioscience (VYNE): Logos group discloses 10.7% ownership and large warrants

Rhea-AI Filing Summary

Yarrow Bioscience, Inc. has a significant institutional holder group led by Logos Global Management LP and related funds and managers, which jointly report beneficial ownership of 286,308 shares of common stock, representing 10.7% of the class based on 2,669,788 shares outstanding as of July 29, 2026. Within this group, Logos Global Master Fund LP holds 176,678 shares (6.6%) and Logos Opportunities Fund V LP holds 109,630 shares (4.1%), with all voting and dispositive powers held on a shared, not sole, basis. The group also references prefunded warrants to acquire an additional 2,201,030 shares, which are excluded from the reported ownership due to a 9.99% beneficial ownership limitation. The filers state the securities are held for investment in the ordinary course and not for the purpose of changing or influencing control of Yarrow Bioscience.

Key Figures

Logos Global beneficial ownership: 286,308 shares Logos Global percent of class: 10.7% Global Fund holdings: 176,678 shares +5 more

8 metrics

Logos Global beneficial ownership 286,308 shares Common Stock beneficially owned by Logos Global Management LP and related reporting persons

Logos Global percent of class 10.7% Percentage of Yarrow Bioscience common stock class attributed to Logos Global and certain related filers

Global Fund holdings 176,678 shares Common Stock beneficially owned by Logos Global Master Fund LP, representing part of the Logos group position

Global Fund percent of class 6.6% Percentage of Yarrow Bioscience common stock held by Logos Global Master Fund LP

Opp V holdings 109,630 shares Common Stock beneficially owned by Logos Opportunities Fund V LP

Opp V percent of class 4.1% Percentage of Yarrow Bioscience common stock held by Logos Opportunities Fund V LP

Shares outstanding baseline 2,669,788 shares Common Stock outstanding on July 29, 2026, as referenced for ownership percentage calculations

Prefunded warrant shares 2,201,030 shares Shares of Common Stock underlying prefunded warrants excluded due to 9.99% beneficial ownership limitation

Key Terms

Schedule 13G, beneficial ownership limitation, prefunded warrants, shared voting power, +2 more

6 terms

Schedule 13G regulatory

"AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13G"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

beneficial ownership limitation regulatory

"prefunded warrants to acquire 2,201,030 shares of Common Stock, which are subject to a 9.99% beneficial ownership limitation"

A beneficial ownership limitation is a rule that caps the percentage of a company’s shares an investor can be treated as owning or controlling for voting, regulatory or tax purposes. It matters to investors because it can restrict how many shares a person or group can buy or vote, affect takeover chances, and influence share liquidity and value — like a speed limit that prevents any single driver from taking over the whole road.

prefunded warrants financial

"The shares reported herein exclude prefunded warrants to acquire 2,201,030 shares of Common Stock"

Prefunded warrants are a security that gives the holder the right to convert the warrant into a share after paying a very small remaining amount because almost the full purchase price was paid upfront. They matter to investors because exercising them increases the company’s outstanding shares (dilution) and can provide immediate cash to the issuer while allowing holders to bypass ownership limits or simplify timing, similar to buying a nearly-complete gift card that only needs a tiny top-up to use.

shared voting power financial

"Shared Voting Power 286,308.00"

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

"Shared Dispositive Power 286,308.00"

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 adviser financial

"Logos Global is a registered investment adviser and holds for the benefit of investment funds"

An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.

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

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Available on EDGAR 08/07/2026 - 07:51 PM Accepted by SEC EDGAR 08/07/2026 - 07:51 PM Learn about SEC filing dates

FAQ

What stake in Yarrow Bioscience (VYNE) does Logos Global Management report?

Logos Global Management and related reporting persons report 286,308 shares of Yarrow Bioscience common stock, representing 10.7% of the outstanding class based on 2,669,788 shares outstanding as of July 29, 2026.

How many Yarrow Bioscience (VYNE) shares are tied to prefunded warrants?

The reporting group notes prefunded warrants to acquire 2,201,030 shares of Yarrow Bioscience common stock, subject to a 9.99% beneficial ownership limitation, and these warrant shares are excluded from the reported beneficial ownership totals.

What percentage of Yarrow Bioscience (VYNE) does Logos Global Master Fund hold?

Logos Global Master Fund LP reports holding 176,678 shares of Yarrow Bioscience common stock, representing 6.6% of the class, with voting and dispositive power shared through Logos-affiliated entities and not held on a sole basis.

What is Logos Opportunities Fund V’s position in Yarrow Bioscience (VYNE)?

Logos Opportunities Fund V LP reports ownership of 109,630 shares of Yarrow Bioscience common stock, equal to 4.1% of the outstanding shares, with voting and dispositive powers shared through its general partner, Logos Opportunities V GP LLC.

Are Logos Global’s Yarrow Bioscience (VYNE) holdings intended to influence control?

The reporting persons certify the securities “were not acquired and are not held for the purpose or with the effect of changing or influencing the control” of Yarrow Bioscience and are held in the ordinary course of investment business.

Who are the reporting persons in this Yarrow Bioscience (VYNE) Schedule 13G/A?

Reporting persons include Logos Global Management LP, its related general partners and funds, and individuals Arsani William and Graham Walmsley, who are described as control persons of the relevant Logos entities and jointly file this Schedule 13G/A.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Yarrow Bioscience, Inc.

(Name of Issuer)

Common Stock, par value $0.0001

(Title of Class of Securities)

92941V407

(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): 92941V407

1

Names of Reporting Persons

Logos Global Management LP

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 286,308.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 286,308.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

286,308.00

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)

10.7 %

12

Type of Reporting Person (See Instructions)

IA, PN

Comment for Type of Reporting Person: The shares reported herein exclude prefunded warrants to acquire 2,201,030 shares of Common Stock, which are subject to a 9.99% beneficial ownership limitation. The percentage is calculated based on 2,669,788 shares of Common Stock outstanding on July 29, 2026, as reported in the Form 8-K filed by the Issuer on July 30, 2026.

SCHEDULE 13G

CUSIP Number(s): 92941V407

1

Names of Reporting Persons

Logos Global Management GP 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 286,308.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 286,308.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

286,308.00

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)

10.7 %

12

Type of Reporting Person (See Instructions)

HC, OO

Comment for Type of Reporting Person: The shares reported herein exclude prefunded warrants to acquire 2,201,030 shares of Common Stock, which are subject to a 9.99% beneficial ownership limitation. The percentage is calculated based on 2,669,788 shares of Common Stock outstanding on July 29, 2026, as reported in the Form 8-K filed by the Issuer on July 30, 2026.

SCHEDULE 13G

CUSIP Number(s): 92941V407

1

Names of Reporting Persons

Logos Global Master Fund LP

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

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 176,678.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 176,678.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

176,678.00

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)

6.6 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: The percentage is calculated based on 2,669,788 shares of Common Stock outstanding on July 29, 2026, as reported in the Form 8-K filed by the Issuer on July 30, 2026.

SCHEDULE 13G

CUSIP Number(s): 92941V407

1

Names of Reporting Persons

Logos GP 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 176,678.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 176,678.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

176,678.00

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)

6.6 %

12

Type of Reporting Person (See Instructions)

HC, OO

Comment for Type of Reporting Person: The percentage is calculated based on 2,669,788 shares of Common Stock outstanding on July 29, 2026, as reported in the Form 8-K filed by the Issuer on July 30, 2026.

SCHEDULE 13G

CUSIP Number(s): 92941V407

1

Names of Reporting Persons

Logos Opportunities Fund V LP

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 109,630.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 109,630.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

109,630.00

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)

4.1 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: The percentage is calculated based on 2,669,788 shares of Common Stock outstanding on July 29, 2026, as reported in the Form 8-K filed by the Issuer on July 30, 2026.

SCHEDULE 13G

CUSIP Number(s): 92941V407

1

Names of Reporting Persons

Logos Opportunities V GP 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 109,630.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 109,630.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

109,630.00

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)

4.1 %

12

Type of Reporting Person (See Instructions)

HC, OO

Comment for Type of Reporting Person: The percentage is calculated based on 2,669,788 shares of Common Stock outstanding on July 29, 2026, as reported in the Form 8-K filed by the Issuer on July 30, 2026.

SCHEDULE 13G

CUSIP Number(s): 92941V407

1

Names of Reporting Persons

Arsani William

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 286,308.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 286,308.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

286,308.00

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)

10.7 %

12

Type of Reporting Person (See Instructions)

HC, IN

Comment for Type of Reporting Person: The shares reported herein exclude prefunded warrants to acquire 2,201,030 shares of Common Stock, which are subject to a 9.99% beneficial ownership limitation. The percentage is calculated based on 2,669,788 shares of Common Stock outstanding on July 29, 2026, as reported in the Form 8-K filed by the Issuer on July 30, 2026.

SCHEDULE 13G

CUSIP Number(s): 92941V407

1

Names of Reporting Persons

Graham Walmsley

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 109,630.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 109,630.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

109,630.00

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)

4.1 %

12

Type of Reporting Person (See Instructions)

HC, IN

Comment for Type of Reporting Person: The percentage is calculated based on 2,669,788 shares of Common Stock outstanding on July 29, 2026, as reported in the Form 8-K filed by the Issuer on July 30, 2026.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Yarrow Bioscience, Inc.
(b)	Address of issuer's principal executive offices: 470 James Street, Suite 007, New Haven, CT 06513
Item 2.
(a)	Name of person filing: Logos Global Management LP ("Logos Global") Logos Global Management GP LLC ("Logos Global GP") Logos Global Master Fund LP ("Global Fund") Logos GP LLC ("Logos GP") Logos Opportunities Fund V LP ("Opp V") Logos Opportunities V GP LLC ("Opp V GP") Arsani William Graham Walmsley Logos Global is a registered investment adviser and holds for the benefit of investment funds, including Global Fund and Opp V, in the ordinary course of business. Logos Global GP is the general partner of Logos Global. Logos GP is the general partner of Global Fund. Opp V GP is the general partner of Opp V. Dr. William is a control person of Logos Global, Logos Global GP and Logos GP. Dr. William and Dr. Walmsley are the control persons of Opp V GP. The reporting persons are filing this statement jointly but not as members of a group, and they expressly disclaim membership in a group. Each reporting person disclaims beneficial ownership of Common Stock except to the extent of that person's pecuniary interest therein. In addition, the filing of this Schedule 13G on behalf of each of the Global Fund or Opp Fund V should not be construed as an admission that it is, and it disclaims that it is, a beneficial owner, as defined in Rule 13d-3 under the Act, of any Common Stock covered by this Schedule 13G.
(b)	Address or principal business office or, if none, residence: One Letterman Drive, Building C, Suite C3-350, San Francisco, California 94129
(c)	Citizenship: See Item 4 of the cover sheet for each reporting person.
(d)	Title of class of securities: Common Stock, par value $0.0001
(e)	CUSIP No.: 92941V407
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: Logos Global: 286,308 Logos Global GP: 286,308 Global Fund: 176,678 Logos GP: 176,678 Opp V: 109,630 Opp V GP: 109,630 Arsani William: 286,308 Graham Walmsley: 109,630
(b)	Percent of class: Logos Global: 10.7% Logos Global GP: 10.7% Global Fund: 6.6% Logos GP: 6.6% Opp V: 4.1% Opp V GP: 4.1% Arsani William: 10.7% Graham Walmsley: 4.1%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Logos Global: 0 Logos Global GP: 0 Global Fund: 0 Logos GP: 0 Opp V: 0 Opp V GP: 0 Graham Walmsley: 0 Arsani William: 0
	(ii) Shared power to vote or to direct the vote: Logos Global: 286,308 Logos Global GP: 286,308 Global Fund: 176,678 Logos GP: 176,678 Opp V: 109,630 Opp V GP: 109,630 Arsani William: 286,308 Graham Walmsley: 109,630
	(iii) Sole power to dispose or to direct the disposition of: Logos Global: 0 Logos Global GP: 0 Global Fund: 0 Logos GP: 0 Arsani William: 0
	(iv) Shared power to dispose or to direct the disposition of: Logos Global: 286,308 Logos Global GP: 286,308 Global Fund: 176,678 Logos GP: 176,678 Opp V: 109,630 Opp V GP: 109,630 Arsani William: 286,308 Graham Walmsley: 109,630
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. Each of Global Fund and Opp V hold the Common Stock for the benefit of each of its respective investors and has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Common Stock.
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 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. 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.

Logos Global Management LP

Signature:	/s/ Arsani William
Name/Title:	Managing Partner
Date:	08/07/2026

Logos Global Management GP LLC

Signature:	/s/ Arsani William
Name/Title:	Managing Member
Date:	08/07/2026

Logos Global Master Fund LP

Signature:	/s/ Arsani William
Name/Title:	Managing Member of Logos GP LLC, General Partner of Logos Global Master Fund LP
Date:	08/07/2026

Logos GP LLC

Signature:	/s/ Arsani William
Name/Title:	Managing Member
Date:	08/07/2026

Logos Opportunities Fund V LP

Signature:	/s/ Graham Walmsley
Name/Title:	Managing Member of Logos Opportunities V GP LLC, General Partner of Logos Opportunities Fund V LP
Date:	08/07/2026

Logos Opportunities V GP LLC

Signature:	/s/ Graham Walmsley
Name/Title:	Managing Member
Date:	08/07/2026

Arsani William

Signature:	/s/ Arsani William
Name/Title:	Reporting person
Date:	08/07/2026

Graham Walmsley

Signature:	/s/ Graham Walmsley
Name/Title:	Reporting person
Date:	08/07/2026

Exhibit Information

EXHIBIT 99.1 AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13G