| $255M | ||
| $48M | ||
| $38M | ||
| $37M | ||
| $34M | ||
| $34M |
Buys | $300,311 | 1 | 2 |
Sells | $193,291,148 | 58 | 98 |
| Ceran Jennifer | director | 1 | $300,311 | 0 | $0 | $300,311 |
| St. Ledger Susan | director | 0 | $0 | 2 | $170,281 | $-170,281 |
| Galvin Carmel | Chief People Officer | 0 | $0 | 1 | $306,925 | $-306,925 |
| Rowland Stephen Eric | President | 0 | $0 | 2 | $403,796 | $-403,796 |
| Whalen Amanda | Chief Financial Officer | 0 | $0 | 10 | $2.92M | $-2.92M |
| Edmond Landon | Chief Legal Officer | 0 | $0 | 8 | $3.12M | $-3.12M |
| Hallen Ed | 0 | $0 | 7 | $9.21M | $-9.21M | |
| SUMMIT PARTNERS L P | 10 percent owner | 0 | $0 | 1 | $88.55M | $-88.55M |
| Bialecki Andrew | Chief Executive Officer | 0 | $0 | 27 | $88.61M | $-88.61M |
Klaviyo, Inc. is a technology company offering a software-as-a-service (SaaS) platform that empowers its clients to send highly targeted and pertinent messages via email, text message (SMS), and push notifications. The firm's primary product, Klaviyo, is a marketing automation platform engineered for personalized outreach. Its comprehensive suite of solutions includes an email marketing tool that meticulously monitors clicks and purchases to enhance campaign effectiveness; an SMS service crafted for fostering e-commerce expansion and customer …
Over the last 12 months, insiders at Klaviyo, Inc. have bought $300,311 and sold $193.29M worth of Klaviyo, Inc. stock.
On average, over the past 5 years, insiders at Klaviyo, Inc. have bought $200,407 and sold $495.4M worth of stock each year.
Highest buying activity among insiders over the last 12 months: Ceran Jennifer (director) — $300,311.
The last purchase of 16,339 shares for transaction amount of $300,311 was made by Ceran Jennifer (director) on 2026‑02‑12.
| 2026-10-07 | Sale | Hallen Ed | 97,482 0.0326% | $17.40 | $1.7M | +15.68% | ||
| 2026-09-24 | Sale | Hallen Ed | 1,300 0.0005% | $17.02 | $22,126 | +8.41% | ||
| 2026-09-11 | Sale | St. Ledger Susan | director | 2,328 0.0008% | $15.93 | $37,085 | +4.40% | |
| 2026-08-31 | Sale | Edmond Landon | Chief Legal Officer | 8,103 0.0027% | $20.44 | $165,625 | -16.86% | |
| 2026-08-31 | Sale | Hallen Ed | 98,782 0.0331% | $20.48 | $2.02M | -16.86% | ||
| 2026-08-28 | Sale | Edmond Landon | Chief Legal Officer | 53,473 0.0179% | $20.01 | $1.07M | -14.57% | |
| 2026-08-14 | Sale | Whalen Amanda | Chief Financial Officer | 14,000 0.0047% | $18.47 | $258,580 | -5.06% | |
| 2026-08-11 | Sale | SUMMIT PARTNERS L P | 10 percent owner | 5M 1.6124% | $17.71 | $88.55M | -4.30% | |
| 2026-07-16 | Sale | Whalen Amanda | Chief Financial Officer | 14,000 0.0047% | $17.75 | $248,500 | -0.51% | |
| 2026-06-18 | Sale | Whalen Amanda | Chief Financial Officer | 14,000 0.0046% | $13.23 | $185,220 | +32.08% | |
| 2026-05-26 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 212,529 0.073% | $14.61 | $3.11M | +18.50% | |
| 2026-05-19 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 200,000 0.0676% | $14.88 | $2.98M | +15.95% | |
| 2026-05-18 | Sale | St. Ledger Susan | director | 9,334 0.003% | $14.27 | $133,196 | +16.43% | |
| 2026-05-14 | Sale | Whalen Amanda | Chief Financial Officer | 14,000 0.0047% | $14.26 | $199,640 | +18.55% | |
| 2026-05-12 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 200,000 0.0676% | $14.61 | $2.92M | +17.51% | |
| 2026-04-20 | Sale | Edmond Landon | Chief Legal Officer | 9,623 0.0031% | $20.00 | $192,460 | -14.86% | |
| 2026-04-16 | Sale | Whalen Amanda | Chief Financial Officer | 14,000 0.0046% | $18.54 | $259,560 | -7.01% | |
| 2026-04-14 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 200,000 0.0634% | $17.19 | $3.44M | +1.30% | |
| 2026-04-07 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 200,000 0.0656% | $18.63 | $3.73M | -7.78% | |
| 2026-03-31 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 200,000 0.0654% | $19.42 | $3.88M | -11.18% |
| Ceran Jennifer | director | 30691 0.0103% | $654,639.03 | 1 | 0 | |
| Fagnan Jeff | 10 percent owner | 3900 0.0013% | $83,187.00 | 1 | 0 | +1.44% |
| Increased Positions | 153 | +45.54% | 39M | +27.32% |
| Decreased Positions | 156 | -46.43% | 23M | -15.91% |
| New Positions | 51 | New | 23M | New |
| Sold Out Positions | 68 | Sold Out | 6M | Sold Out |
| Total Postitions | 333 | -0.89% | 159M | +11.41% |
| Summit Partners L P | $552,763.00 | 13.66% | 18.85M | -12M | -38.84% | 2025-09-30 |
| Vanguard Group Inc | $374,936.00 | 9.27% | 12.79M | +2M | +19.2% | 2025-09-30 |
| Morgan Stanley | $313,487.00 | 7.75% | 10.69M | +6M | +140.61% | 2025-09-30 |
| Fmr Llc | $241,598.00 | 5.97% | 8.24M | +7M | +436.96% | 2025-09-30 |
| Point72 Asset Management, L.P. | $153,497.00 | 3.79% | 5.24M | +5M | New | 2025-09-30 |
| Alliancebernstein L.P. | $140,932.00 | 3.48% | 4.81M | +382,428 | +8.64% | 2025-09-30 |
| Blackrock, Inc. | $107,220.00 | 2.65% | 3.66M | +240,003 | +7.02% | 2025-09-30 |
| Sands Capital Alternatives, Llc | $103,062.00 | 2.55% | 3.52M | 0 | 0% | 2025-09-30 |
| Whale Rock Capital Management Llc | $89,630.00 | 2.22% | 3.06M | -627,478 | -17.03% | 2025-09-30 |
| Citadel Advisors Llc | $87,740.00 | 2.17% | 2.99M | +2M | +370.58% | 2025-09-30 |