SCHEDULE 13G

ELECTRA THERAPEUTICS INC

Common Stock, par value $0.0001 per share · CUSIP: 284825106

Event date: 2026-09-30

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

• Westlake BioPartners Fund I, L.P.

  Shares: 3,527,136.00 · Class: 5.6%

• Westlake BioPartners GP I, LLC

  Shares: 3,527,136.00 · Class: 5.6%

• Westlake BioPartners Fund II, L.P.

  Shares: 2,820,403.00 · Class: 4.5%

• Westlake BioPartners GP II, LLC

  Shares: 2,820,403.00 · Class: 4.5%

• Dr. Beth C. Seidenberg

  Shares: 6,347,539.00 · Class: 10.1%

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