SCHEDULE 13G

Lexeo Therapeutics Inc

Common Stock, $0.0001 par value per share · CUSIP: 52886X107

Event date: 2025-05-28

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

• Frazier Life Sciences Public Fund, L.P.

  Shares: 3,730,419.00 · Class: 6.8%

• FHMLSP, L.P.

  Shares: 3,730,419.00 · Class: 6.8%

• FHMLSP, L.L.C.

  Shares: 3,730,419.00 · Class: 6.8%

• Frazier Life Sciences Public Overage Fund, L.P.

  Shares: 818,607.00 · Class: 1.5%

• FHMLSP Overage, L.P.

  Shares: 818,607.00 · Class: 1.5%

• FHMLSP Overage, L.L.C.

  Shares: 818,607.00 · Class: 1.5%

• Frazier Life Sciences X, L.P.

  Shares: 114,541.00 · Class: 0.2%

• FHMLS X, L.P.

  Shares: 114,541.00 · Class: 0.2%

• FHMLS X, L.L.C.

  Shares: 114,541.00 · Class: 0.2%

• Frazier Life Sciences XI, L.P.

  Shares: 304,989.00 · Class: 0.6%

• FHMLS XI, L.P.

  Shares: 304,989.00 · Class: 0.6%

• FHMLS XI, L.L.C.

  Shares: 304,989.00 · Class: 0.6%

• Frazier Life Sciences XII, L.P.

  Shares: 532,256.00 · Class: 1.0%

• FHMLS XII, L.P.

  Shares: 532,256.00 · Class: 1.0%

• FHMLS XII, L.L.C.

  Shares: 532,256.00 · Class: 1.0%

• James N. Topper

  Shares: 5,500,812.00 · Class: 9.9%

• Patrick J. Heron

  Shares: 5,500,812.00 · Class: 9.9%

• Albert Cha

  Shares: 4,549,026.00 · Class: 8.3%

• James Brush

  Shares: 4,549,026.00 · Class: 8.3%

• Daniel Estes

  Shares: 837,245.00 · Class: 1.5%

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