| $164M | ||
| $143M | ||
| $143M | ||
| $76M | ||
| $60M | ||
| $35M |
Buys | $100,503 | 1 | 2 |
Sells | $1,085,650,717 | 62 | 98 |
| Fagnan Jeff | 10 percent owner | 1 | $100,503 | 0 | $0 | $100,503 |
| St. Ledger Susan | director | 0 | $0 | 1 | $109,899 | $-109,899 |
| Galvin Carmel | Chief People Officer | 0 | $0 | 3 | $1.05M | $-1.05M |
| Edmond Landon | Chief Legal Officer | 0 | $0 | 5 | $1.76M | $-1.76M |
| Rowland Stephen Eric | President | 0 | $0 | 10 | $2.18M | $-2.18M |
| Whalen Amanda | Chief Financial Officer | 0 | $0 | 10 | $4.45M | $-4.45M |
| Hallen Ed | 0 | $0 | 5 | $8.31M | $-8.31M | |
| Bialecki Andrew | Chief Executive Officer | 0 | $0 | 23 | $450.59M | $-450.59M |
| SUMMIT PARTNERS L P | 10 percent owner | 0 | $0 | 5 | $617.2M | $-617.2M |
Klaviyo, Inc., a technology company that provides a software-as-a-service platform to enable its customers to send the right messages at the right time across email, short message service (SMS), and push notifications. The company offers Klaviyo, a marketing automation platform that sends personalized and targeted messages. Its products include email marketing solution to track every click and purchase to optimize campaigns; SMS, a text marketing solution for ecommerce growth and retention; and mobile push solution that reaches customers directly on their lock screen with mobile push notifications. The company also provides Review solution to get the product reviews; and a customer data platform that helps store, analyze, and use data at scale. It serves individuals, small and medium enterprises, and companies in North America, Western Europe, Canada, the United Kingdom, Australia, and New Zealand. The was incorporated in 2012 and is based in Boston, Massachusetts.
Over the last 12 months, insiders at Klaviyo, Inc. have bought $100,503 and sold $1.09B worth of Klaviyo, Inc. stock.
On average, over the past 5 years, insiders at Klaviyo, Inc. have bought $100,503 and sold $671.64M worth of stock each year.
Highest buying activity among insiders over the last 12 months: Fagnan Jeff (10 percent owner) — $100,503.
The last purchase of 3,900 shares for transaction amount of $100,503 was made by Fagnan Jeff (10 percent owner) on 2025‑04‑09.
| 2026-01-15 | Sale | Whalen Amanda | Chief Financial Officer | 14,000 0.0047% | $25.83 | $361,663 | -7.79% | |
| 2026-01-15 | Sale | Edmond Landon | Chief Legal Officer | 10,000 0.0033% | $25.83 | $258,337 | -7.79% | |
| 2026-01-13 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 140,646 0.047% | $27.41 | $3.85M | -4.07% | |
| 2026-01-07 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 16,649 0.0056% | $30.01 | $499,636 | -3.98% | |
| 2026-01-06 | Sale | Bialecki Andrew | Co-Chief Executive Officer | 137,504 0.0453% | $28.91 | $3.98M | -5.74% | |
| 2025-12-22 | Sale | Bialecki Andrew | Chief Executive Officer | 100,000 0.0328% | $32.97 | $3.3M | -11.35% | |
| 2025-12-18 | Sale | Whalen Amanda | Chief Financial Officer | 14,000 0.0046% | $31.38 | $439,363 | -6.11% | |
| 2025-12-18 | Sale | Edmond Landon | Chief Legal Officer | 14,190 0.0047% | $31.38 | $445,302 | -6.11% | |
| 2025-12-17 | Sale | Hallen Ed | 117,550 0.0394% | $30.36 | $3.57M | -2.92% | ||
| 2025-12-17 | Sale | Bialecki Andrew | Chief Executive Officer | 100,000 0.0336% | $30.40 | $3.04M | -2.92% | |
| 2025-12-16 | Sale | Bialecki Andrew | Chief Executive Officer | 138,648 0.0453% | $29.04 | $4.03M | +3.46% | |
| 2025-12-15 | Sale | Rowland Stephen Eric | President | 7,104 0.0024% | $29.45 | $209,217 | +1.23% | |
| 2025-12-15 | Sale | Hallen Ed | 757 0.0003% | $30.15 | $22,820 | +1.23% | ||
| 2025-12-11 | Sale | Bialecki Andrew | Chief Executive Officer | 17,777 0.0059% | $30.00 | $533,310 | -1.69% | |
| 2025-12-10 | Sale | Bialecki Andrew | Chief Executive Officer | 82,223 0.0279% | $30.12 | $2.48M | +1.19% | |
| 2025-12-09 | Sale | Bialecki Andrew | Chief Executive Officer | 131,362 0.0435% | $29.42 | $3.86M | +0.32% | |
| 2025-12-04 | Sale | Bialecki Andrew | Chief Executive Officer | 952 0.0003% | $30.00 | $28,560 | +2.26% | |
| 2025-12-02 | Sale | Bialecki Andrew | Chief Executive Officer | 142,045 0.0469% | $28.62 | $4.07M | +4.19% | |
| 2025-11-24 | Sale | Bialecki Andrew | Chief Executive Officer | 144,717 0.0481% | $27.76 | $4.02M | +5.06% | |
| 2025-11-20 | Sale | Edmond Landon | Chief Legal Officer | 14,394 0.0049% | $27.59 | $397,128 | +3.32% |
| Increased Positions | 178 | +68.73% | 36M | +26.78% |
| Decreased Positions | 116 | -44.79% | 25M | -19.16% |
| New Positions | 67 | New | 9M | New |
| Sold Out Positions | 37 | Sold Out | 3M | Sold Out |
| Total Postitions | 321 | +23.94% | 143M | +7.62% |
| 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 |