Blaser Brian J. 4

What Happened
Brian J. Blaser, President and CEO of QuidelOrtho Corporation, had 21,446 restricted stock units (RSUs) vest on January 29, 2026. Those RSUs converted into 21,446 common shares (derivative conversion). To satisfy tax withholding obligations, 7,755 of the newly issued shares were withheld by the company at a reported price of $27.41 per share, amounting to approximately $212,565. The RSU release (award) is recorded at $0 acquisition price for reporting purposes.

Key Details

• Transaction date: January 29, 2026 (reported on Form 4 filed February 2, 2026 — timely within required business days).
• Awards/Conversions: 21,446 RSUs vested and were converted into 21,446 shares (codes A and M; acquisition/conversion at $0.00).
• Tax withholding: 7,755 shares withheld/disposed at $27.41 per share for tax withholding (code F), totaling about $212,565.
• Shares owned after transaction: Not specified in this filing.
• Notable footnotes: The release reflects the payout of previously reported RSUs; 1 RSU = 1 share. An additional 42,892 RSUs remain and will vest in equal installments on Jan 29, 2027 and Jan 29, 2028.

Context
This was a routine vesting event, not an open-market sale or purchase. The withholding of shares to cover taxes is a common, administrative action (a cashless-like tax withholding) and does not necessarily signal any change in insider sentiment. The filing shows conversion of RSUs to shares rather than an exercise of stock options for cash.