SCHEDULE 13G/A

Sana Biotechnology Inc

Common Stock, par value $0.0001 per share · CUSIP: 799566104

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

• ARCH Venture Fund IX, L.P.

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Fund IX Overage, L.P.

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Fund X, L.P.

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Fund X Overage, L.P.

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Partners IX, L.P.

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Partners IX Overage, L.P.

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Partners X Overage, L.P.

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Partners X, L.P.

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Partners IX, LLC

  Shares: 45,860,681 · Class: 17.2%

• ARCH Venture Partners X, LLC

  Shares: 45,860,681 · Class: 17.2%

• Keith Crandell

  Shares: 45,860,681 · Class: 17.2%

• Clinton Bybee

  Shares: 45,860,681 · Class: 17.2%

• Robert Nelsen

  Shares: 46,093,125 · Class: 17.3%

• Steven Gillis

  Shares: 45,860,681 · Class: 17.2%

• Kristina Burow

  Shares: 45,860,681 · Class: 17.2%

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