SCHEDULE 13G

CITY THERAPEUTICS, INC.

Common Stock, par value $0.0001 per share · CUSIP: 178782108

Event date: 2026-10-19

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

• VIKING GLOBAL INVESTORS LP

  Shares: 3,727,005.00 · Class: 7%

• Viking Global Opportunities Parent GP LLC

  Shares: 3,727,005.00 · Class: 7%

• Viking Global Opportunities GP LLC

  Shares: 2,608,904.00 · Class: 4.9%

• Viking Global Opportunities Portfolio GP LLC

  Shares: 2,608,904.00 · Class: 4.9%

• Viking Global Opportunities Illiquid Investments Sub-Master LP

  Shares: 2,608,904.00 · Class: 4.9%

• Viking Global Opportunities Vintage IV GP LLC

  Shares: 1,118,101.00 · Class: 2.1%

• Viking Global Opportunities Vintage IV Portfolio GP LLC

  Shares: 1,118,101.00 · Class: 2.1%

• Viking Global Opportunities Vintage IV (Aggregator) LP

  Shares: 1,118,101.00 · Class: 2.1%

• HALVORSEN OLE ANDREAS

  Shares: 3,727,005.00 · Class: 7%

• Shabet Rose Sharon

  Shares: 3,727,005.00 · Class: 7%

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