SCHEDULE 13G/A

Klaviyo Inc

Series A common stock, par value $0.001 per share · CUSIP: 49845K101

Event date: 2025-03-31

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

• Accel Growth Fund V L.P. ("AGF5")

  Shares: 1,055,195.00 · Class: 1.2%

• Accel Growth Fund V Strategic Partners L.P. ("AGF5SP")

  Shares: 44,808.00 · Class: 0.0%

• Accel Growth Fund V Associates L.L.C. ("AGF5A")

  Shares: 1,100,003.00 · Class: 1.2%

• Accel Growth Fund V Investors (2019) L.L.C. ("AGFI19")

  Shares: 54,855.00 · Class: 0.1%

• Accel Leaders Fund II L.P. ("ALF2")

  Shares: 3,163,506.00 · Class: 3.4%

• Accel Leaders Fund II Strategic Partners L.P. ("ALF2SP")

  Shares: 134,772.00 · Class: 0.1%

• Accel Leaders Fund II Associates L.L.C. ("ALF2A")

  Shares: 3,298,278.00 · Class: 3.6%

• Accel Leaders Fund II Investors (2019) L.L.C. ("ALFI19")

  Shares: 166,299.00 · Class: 0.2%

• Ping Li ("PL")

  Shares: 4,658,363.00 · Class: 4.9%

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