SCHEDULE 13G/A

QuidelOrtho Corp

Common Stock, par value $0.001 per share · CUSIP: 219798105

Event date: 2025-12-31

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

• Rubric Capital Management LP

  Shares: 3,777,157.00 · Class: 5.56%

• David Rosen

  Shares: 3,777,157.00 · Class: 5.56%

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