SCHEDULE 13G/A

JENA ACQUISITION CORP II

Class A ordinary shares, par value $0.0001 per share · CUSIP: G5093B105

Event date: 2025-09-30

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

• Linden Capital L.P.

  Shares: 1,479,234 · Class: 6.4%

• Linden GP LLC

  Shares: 1,479,234 · Class: 6.4%

• Linden Advisors LP

  Shares: 1,550,000 · Class: 6.7%

• Siu Min Wong

  Shares: 1,550,000 · Class: 6.7%

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