SCHEDULE 13G

QUOIN PHARMACEUTICALS LTD

Ordinary Shares · CUSIP: 74907L409

Event date: 2025-12-10

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Stonepine Capital Management, LLC

  Shares: 3,030,926.00 · Class: 9.9%

• Stonepine Capital, L.P.

  Shares: 3,030,926.00 · Class: 9.9%

• Stonepine GP, LLC

  Shares: 3,030,926.00 · Class: 9.9%

• Jon M. Plexico

  Shares: 3,030,926.00 · Class: 9.9%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.