🕵️ Klaviyo Inc ($KVYO)
SEC insider & ownership activity, last 12 months · CIK 1835830 · every row links its SEC filing
Over the last 12 months insiders sold $504.7M against $300K of open-market buying. Summit Partners L P sold $351.8M in discretionary trades (Aug–Sep). Bialecki Andrew trimmed 37.7% → 35.1%; Shopify Inc. trimmed 25.5% → 18.9%. No red-flag 8-Ks in the window.
🚨 4 signals active —
planned-vs-executed verdicts, pre-event flags, and cluster context live in the
API and the
alerts bot.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
1 buyer, $300K (1 lots) · 8 sellers, $504.7M (109 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Summit Partners L P | 0 | – | 3 | $351.8M | Sep 8, 2025 |
| Andrew Bialecki | 0 | – | 56 | $136.5M | May 26, 2026 |
| Hallen Ed | 0 | – | 10 | $8.3M | Dec 17, 2025 |
| Amanda Whalen | 0 | – | 18 | $4.0M | Jul 16, 2026 |
| Landon Ramon Edmond | 0 | – | 10 | $2.2M | Apr 20, 2026 |
| Stephen E. Rowland | 0 | – | 7 | $1.0M | Dec 15, 2025 |
| Galvin Carmel | 0 | – | 3 | $660K | Nov 17, 2025 |
| Ceran Jennifer | 1 | $300K | 0 | – | Feb 12, 2026 |
| St. Ledger Susan | 0 | – | 2 | $243K | May 18, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Bialecki Andrew | 35.1% | 13G | Feb 10, 2026 | filing ↗ | |
| Hallen Ed | 19.4% | 13G | Nov 5, 2025 | filing ↗ | |
| Shopify Inc. | 18.9% | 13D | Aug 29, 2025 | filing ↗ | |
| Shopify Strategic Holdings 3 LLC | 18.9% | 13D | Aug 29, 2025 | filing ↗ | |
| Summit Partners, L.P. | 12.0% | 13G | Nov 13, 2025 | filing ↗ | |
| Accomplice Fund I, L.P. | 10.5% | 13G | May 7, 2025 | filing ↗ | |
| Accomplice Associates I, LLC | 10.5% | 13G | May 7, 2025 | filing ↗ | |
| Jeff Fagnan | 10.5% | 13G | May 7, 2025 | filing ↗ | |
| Capital International Investors | 8.0% | 13G | May 14, 2026 | filing ↗ | |
| Summit Partners Growth Equity Fund IX-A, L.P. | 7.1% | 13G | Nov 13, 2025 | filing ↗ | |
| FMR LLC | 6.7% | 13G | Nov 5, 2025 | filing ↗ | |
| Abigail P. Johnson | 6.7% | 13G | Nov 5, 2025 | filing ↗ | |
| Li Ping | 5.6% | 13G | Feb 14, 2025 | filing ↗ | |
| Vanguard Portfolio Management | 5.2% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Amanda Whalen | $565K | Jun 18, 2026 | filing ↗ |
| Andrew Bialecki | $3.2M | May 26, 2026 | filing ↗ |
| St. Ledger Susan | $133K | May 18, 2026 | filing ↗ |
| Landon Ramon Edmond | $180K | Apr 20, 2026 | filing ↗ |
| Amanda Whalen | $514K | Apr 16, 2026 | filing ↗ |
| Andrew Bialecki | $12.3M | Apr 7, 2026 | filing ↗ |
| Stephen E. Rowland | $95K | Mar 17, 2026 | filing ↗ |
| Landon Ramon Edmond | $285K | Mar 12, 2026 | filing ↗ |
| Stephen E. Rowland | $96K | Mar 5, 2026 | filing ↗ |
| Andrew Bialecki | $21.4M | Feb 24, 2026 | filing ↗ |
| Landon Ramon Edmond | $1.2M | Dec 18, 2025 | filing ↗ |
| Amanda Whalen | $1.7M | Dec 18, 2025 | filing ↗ |
| Hallen Ed | $3.6M | Dec 17, 2025 | filing ↗ |
| Hallen Ed | $23K | Dec 15, 2025 | filing ↗ |
| Stephen Rowland | $424K | Dec 15, 2025 | filing ↗ |
| Andrew Bialecki | $38.0M | Dec 2, 2025 | filing ↗ |
| Landon Ramon Edmond | $396K | Nov 20, 2025 | filing ↗ |
| Galvin Carmel | $319K | Nov 17, 2025 | filing ↗ |
| Stephen Rowland | $203K | Nov 17, 2025 | filing ↗ |
| Amanda Whalen | $427K | Nov 14, 2025 | filing ↗ |
| Hallen Ed | $84K | Nov 11, 2025 | filing ↗ |
| Hallen Ed | $1.8M | Nov 10, 2025 | filing ↗ |
| Stephen Rowland | $174K | Oct 15, 2025 | filing ↗ |
| Hallen Ed | $2.8M | Sep 15, 2025 | filing ↗ |
| Stephen Rowland | $222K | Sep 15, 2025 | filing ↗ |
| St. Ledger Susan | $110K | Sep 10, 2025 | filing ↗ |
| Summit Investors GE IX/VC IV (UK), L.P. | $54K | Sep 8, 2025 | filing ↗ |
| Summit Investors GE IX/VC IV, LLC | $413K | Sep 8, 2025 | filing ↗ |
| Summit Partners Co-Invest (KIWI), LP | $4.8M | Sep 8, 2025 | filing ↗ |
| Summit Partners Growth Equity Fund IX-B, L.P. | $49.0M | Sep 8, 2025 | filing ↗ |
| Summit Partners Growth Equity Fund IX-A, L.P. | $78.5M | Sep 8, 2025 | filing ↗ |
| Andrew Bialecki | $73.7M | Aug 26, 2025 | filing ↗ |
| Galvin Carmel | $352K | Aug 18, 2025 | filing ↗ |
| Stephen Rowland | $223K | Aug 18, 2025 | filing ↗ |
| Landon Ramon Edmond | $313K | Aug 18, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jul 13, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 13, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 13, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 9, 2026 | filing ↗ |
| Earnings (2.02) | May 1, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 1, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 1, 2026 | filing ↗ |
| Other events (8.01) | Mar 2, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 2, 2026 | filing ↗ |
| Earnings (2.02) | Feb 10, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 10, 2026 | filing ↗ |
| Officer/director changes (5.02) | Dec 8, 2025 | filing ↗ |
| Charter/bylaw changes (5.03) | Dec 8, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 8, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 8, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 2, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 2, 2025 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Sep 25, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 25, 2025 | filing ↗ |
| Officer/director changes (5.02) | Aug 29, 2025 | filing ↗ |
| Material agreement (1.01) | Aug 13, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 13, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 13, 2025 | filing ↗ |
| Earnings (2.02) | Aug 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 5, 2025 | filing ↗ |
| Officer/director changes (5.02) | Jul 30, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 30, 2025 | filing ↗ |