Form4insider filings, from the source

Company · CIK 0001835830 · SIC 7372 — Services-Prepackaged Software · NYSE

Klaviyo, Inc. · KVYO

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $92.6M · 8net −$92.6M
$10k$10k$1M$1M$100M$100MbuyssalesSep 2024Jan 2025May 2025Sep 2025Jan 2026May 2026Sep 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 24, 2026 SForm 4 →Sep 25, 5:50 pm EDTEd HallenDirector, 10% Owner1,300$17.02$22,126446,946−0.29%10b5-1
Sep 15, 2026 AForm 4 →Sep 17, 6:14 pm EDTErica Ellen SmithChief Financial Officer1,150,684——1,150,684—
Sep 11, 2026 SForm 4 →Sep 14, 4:49 pm EDTSusan St. LedgerDirector2,328$15.93$37,08523,433−9.04%10b5-1
Aug 31, 2026 GForm 4 →Sep 1, 8:18 pm EDTEd HallenDirector, 10% Owner17,885——447,746—10b5-1
Aug 31, 2026 SForm 4 →Sep 1, 8:18 pm EDTEd HallenDirector, 10% Owner98,782$20.48$2,023,260465,631−17.5%10b5-1
Aug 28, 2026 SForm 4 →Sep 1, 8:16 pm EDTLandon EdmondChief Legal Officer61,576$20.07$1,235,620477,866−11.4%10b5-1
Aug 15, 2026 CFForm 4 →Aug 18, 8:09 pm EDTGomez Luciano FernandezCo-Chief Executive Officer, Director36,134$18.49$538,6692,301,573—
Aug 15, 2026 FForm 4 →Aug 18, 8:06 pm EDTLandon EdmondChief Legal Officer22,342$18.49$413,104539,442—
Aug 15, 2026 FForm 4 →Aug 18, 8:05 pm EDTCarmel GalvinChief People Officer30,541$18.49$564,703907,458—
Aug 15, 2026 FForm 4 →Aug 18, 8:02 pm EDTAmanda WhalenChief Financial Officer28,950$18.49$535,286795,242—10b5-1
Aug 14, 2026 SForm 4 →Aug 18, 8:02 pm EDTAmanda WhalenChief Financial Officer14,000$18.47$258,580824,192−1.67%10b5-1
Aug 11, 2026 SForm 4 →Aug 13, 4:30 pm EDTSUMMIT PARTNERS L P +510% Owner5,000,000$17.71$88,550,0000−100%
Aug 11, 2026 CForm 4 →Aug 13, 4:30 pm EDTSUMMIT PARTNERS L P +510% Owner5,000,000——5,000,000—
Jul 22, 2026 CForm 4 →Jul 24, 8:08 pm EDTRoxanne OulmanDirector16,775——16,775—
Jul 16, 2026 SForm 4 →Jul 17, 8:01 pm EDTAmanda WhalenChief Financial Officer14,000$17.75$248,500838,192−1.64%10b5-1
Jun 18, 2026 SForm 4 →Jun 18, 8:08 pm EDTAmanda WhalenChief Financial Officer14,000$13.23$185,220852,192−1.62%10b5-1
Jun 9, 2026 ACForm 4 →Jun 11, 8:04 pm EDTRoxanne OulmanDirector22,991——37,343—
Jun 9, 2026 AForm 4 →Jun 11, 8:04 pm EDTSusan St. LedgerDirector14,822——25,761—
Jun 9, 2026 AForm 4 →Jun 11, 8:04 pm EDTJennifer CeranDirector14,822——45,513—
Jun 9, 2026 AForm 4 →Jun 11, 8:04 pm EDTTony WeismanDirector14,822——104,174—
Jun 9, 2026 FForm 4 →Jun 11, 8:03 pm EDTGomez Luciano FernandezCo-Chief Executive Officer, Director1,746$14.78$25,8062,323,705—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 31, 2026 XForm 4 →Aug 31, 5:35 pm EDTShopify Strategic Holdings 3 LLC +110% Owner688,766$0.01$3,44417,317,491—
Aug 15, 2026 CForm 4 →Aug 18, 8:09 pm EDTGomez Luciano FernandezCo-Chief Executive Officer, Director7,001$18.49$129,44848,999—
Aug 11, 2026 CForm 4 →Aug 13, 4:30 pm EDTSUMMIT PARTNERS L P +510% Owner5,000,000——13,852,778—
Jul 22, 2026 CForm 4 →Jul 24, 8:08 pm EDTRoxanne OulmanDirector16,775——29,891—
Jun 11, 2026 CForm 4 →Jun 11, 8:04 pm EDTRoxanne OulmanDirector8,169——15,165—