SCHEDULE 13D

Surrozen, Inc.

Common Stock, $0.0001 par value per share · CUSIP: 86889P208

Event date: 2026-02-06

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

• The Column Group IV GP, LPReported CIK 0001796356

  Shares: 4,460,979 · Class: 8.3%

• The Column Group IV, LPReported CIK 0001796354

  Shares: 4,312,139 · Class: 8.0%

• The Column Group IV-A, LPReported CIK 0001796353

  Shares: 148,840 · Class: 0.3%

• The Column Group Opportunity III, LPReported CIK 0001931825

  Shares: 1,892,733 · Class: 3.5%

• The Column Group Opportunity III GP, LPReported CIK 0001932874

  Shares: 1,892,733 · Class: 3.5%

• TCG Opportunity III GP, LLCReported CIK 0001932445

  Shares: 1,892,733 · Class: 3.5%

• Tim KutzkeyReported CIK 0001614186

  Shares: 6,353,712 · Class: 11.6%

• Peter SvennilsonReported CIK 0001606074

  Shares: 6,353,712 · Class: 11.6%

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