Insider filing report for Changes in Beneficial Ownership
- Schedule 13G & 13D forms are used to report a party's ownership of stock which exceeds 5% of a company's total stock issue.
- Schedule 13G is a shorter version of Schedule 13D with fewer reporting requirements.
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 |
SCHEDULE 13G
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UNDER THE SECURITIES EXCHANGE ACT OF 1934
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Quoin Pharmaceuticals, Ltd. (Name of Issuer) |
Ordinary Shares (Title of Class of Securities) |
74907L409 (CUSIP Number) |
12/10/2025 (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)
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 Rule 13d-1(c)
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| Rule 13d-1(d)
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SCHEDULE 13G
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| CUSIP No. | 74907L409 |
| 1 | Names of Reporting Persons
Stonepine Capital 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: |
| ||||||||
| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
3,030,926.00 | ||||||||
| 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)
9.9 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
IA, OO |
Comment for Type of Reporting Person: The reporting persons beneficially own American Depositary Shares ("ADSs"). Each ADS represents 35 Ordinary Shares of the Issuer. The securities beneficially owned by the reporting persons consist of (1) 58,728 ADSs beneficially owned by the reporting persons, (2) pre-funded warrants to acquire 81,212 ADSs beneficially owned by the reporting persons, and (3) ordinary warrants to acquire 484,848 ADSs beneficially owned by the reporting persons. The pre-funded warrants and ordinary warrants are subject to a 9.99% beneficial ownership limitation. The percentage reported herein is calculated based on 29,364,180 Ordinary Shares, represented by 838,976 ADSs, outstanding as of November 3, 2025, as reported in the prospectus filed by the Issuer on December 5, 2025.
SCHEDULE 13G
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| CUSIP No. | 74907L409 |
| 1 | Names of Reporting Persons
Stonepine Capital, 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: |
| ||||||||
| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
3,030,926.00 | ||||||||
| 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)
9.9 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
PN |
Comment for Type of Reporting Person: The reporting persons beneficially own ADSs. Each ADS represents 35 Ordinary Shares of the Issuer. The securities beneficially owned by the reporting persons consist of (1) 58,728 ADSs beneficially owned by the reporting persons, (2) pre-funded warrants to acquire 81,212 ADSs beneficially owned by the reporting persons, and (3) ordinary warrants to acquire 484,848 ADSs beneficially owned by the reporting persons. The pre-funded warrants and ordinary warrants are subject to a 9.99% beneficial ownership limitation. The percentage reported herein is calculated based on 29,364,180 Ordinary Shares, represented by 838,976 ADSs, outstanding as of November 3, 2025, as reported in the prospectus filed by the Issuer on December 5, 2025.
SCHEDULE 13G
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| CUSIP No. | 74907L409 |
| 1 | Names of Reporting Persons
Stonepine 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: |
| ||||||||
| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
3,030,926.00 | ||||||||
| 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)
9.9 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
OO |
Comment for Type of Reporting Person: The reporting persons beneficially own ADSs. Each ADS represents 35 Ordinary Shares of the Issuer. The securities beneficially owned by the reporting persons consist of (1) 58,728 ADSs beneficially owned by the reporting persons, (2) pre-funded warrants to acquire 81,212 ADSs beneficially owned by the reporting persons, and (3) ordinary warrants to acquire 484,848 ADSs beneficially owned by the reporting persons. The pre-funded warrants and ordinary warrants are subject to a 9.99% beneficial ownership limitation. The percentage reported herein is calculated based on 29,364,180 Ordinary Shares, represented by 838,976 ADSs, outstanding as of November 3, 2025, as reported in the prospectus filed by the Issuer on December 5, 2025.
SCHEDULE 13G
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| CUSIP No. | 74907L409 |
| 1 | Names of Reporting Persons
Jon M. Plexico | ||||||||
| 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: |
| ||||||||
| 9 | Aggregate Amount Beneficially Owned by Each Reporting Person
3,030,926.00 | ||||||||
| 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)
9.9 % | ||||||||
| 12 | Type of Reporting Person (See Instructions)
HC, IN |
Comment for Type of Reporting Person: The reporting persons beneficially own ADSs. Each ADS represents 35 Ordinary Shares of the Issuer. The securities beneficially owned by the reporting persons consist of (1) 58,728 ADSs beneficially owned by the reporting persons, (2) pre-funded warrants to acquire 81,212 ADSs beneficially owned by the reporting persons, and (3) ordinary warrants to acquire 484,848 ADSs beneficially owned by the reporting persons. The pre-funded warrants and ordinary warrants are subject to a 9.99% beneficial ownership limitation. The percentage reported herein is calculated based on 29,364,180 Ordinary Shares, represented by 838,976 ADSs, outstanding as of November 3, 2025, as reported in the prospectus filed by the Issuer on December 5, 2025.
SCHEDULE 13G
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| Item 1. | ||
| (a) | Name of issuer:
Quoin Pharmaceuticals, Ltd. | |
| (b) | Address of issuer's principal executive offices:
42127 Pleasant Forest Court, Ashburn, VA 20148 | |
| Item 2. | ||
| (a) | Name of person filing:
Stonepine Capital Management, LLC, a Delaware limited liability company ("Stonepine") Stonepine Capital, L.P., a Delaware limited partnership (the "Partnership") Stonepine GP, LLC, a Delaware limited liability company (the "General Partner") Jon M. Plexico Stonepine and the General Partner are the investment adviser and general partner, respectively, of the Partnership. Mr. Plexico is the control person of Stonepine and the General Partner. The reporting persons are filing this Schedule 13G jointly, but not as members of a group, and each disclaims membership in a group. Each reporting person also disclaims beneficial ownership of Ordinary Shares except to the extent of that person's pecuniary interest therein. In addition, the filing of this Schedule 13G on behalf of the Partnership 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 Ordinary Shares covered by this Schedule 13G. | |
| (b) | Address or principal business office or, if none, residence:
2900 NW Clearwater Drive, Suite 100-11, Bend OR 97703 | |
| (c) | Citizenship:
See Item 4 of the cover sheet for each reporting person. | |
| (d) | Title of class of securities:
Ordinary Shares | |
| (e) | CUSIP No.:
74907L409 | |
| 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);
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| (b) | Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
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| (c) | Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
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| (d) | Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
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| (e) | An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
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| (f) | An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
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| (g) | A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
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| (h) | A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
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| (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);
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| (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:
Stonepine: 3,030,926 Partnership: 3,030,926 General Partner: 3,030,926 Jon M. Plexico: 3,030,926 | |
| (b) | Percent of class:
Stonepine: 9.9% Partnership: 9.9% General Partner: 9.9% Jon M. Plexico: 9.9% %
| |
| (c) | Number of shares as to which the person has:
| |
| (i) Sole power to vote or to direct the vote:
Stonepine: 0 Partnership: 0 General Partner: 0 Jon M. Plexico: 0 | ||
| (ii) Shared power to vote or to direct the vote:
Stonepine: 3,030,926 Partnership: 3,030,926 General Partner: 3,030,926 Jon M. Plexico: 3,030,926 | ||
| (iii) Sole power to dispose or to direct the disposition of:
Stonepine: 0 Partnership: 0 General Partner: 0 Jon M. Plexico: 0 | ||
| (iv) Shared power to dispose or to direct the disposition of:
Stonepine: 3,030,926 Partnership: 3,030,926 General Partner: 3,030,926 Jon M. Plexico: 3,030,926 | ||
| Item 5. | 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 Partnership holds ADSs for the benefit of its investors and has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, ADSs. | ||
| 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
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| Item 8. | Identification and Classification of Members of the Group. | |
Not Applicable
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| Item 9. | Notice of Dissolution of Group. | |
Not Applicable
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| 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.
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Exhibit Information
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EXHIBIT 99 - AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13G |