SCHEDULE 13G/A

Klaviyo Inc

Series A common stock, par value $0.001 per share (the "Series A Common Stock") · CUSIP: 49845K101

Event date: 2025-06-30

Filing-level shares

87,796,336.00

Percent of class

42.9%

• Bialecki Andrew

  Shares: 87,796,336.00 · Class: 42.9%

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