Dudediligence.

Klaviyo, Inc

KVYONYSE · Services-Prepackaged Software
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$182.8M

34 notices · 9,214,356 sh

Oct 2025 to Oct 2026

Reported ·

$107.8M

81 sales · 1 buy · $300,311 bought

Oct 2025 to Jun 2026

The two figures cover different periods.

All 81 reported sales carry the 10b5-1 box.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-09-24: Hallen Ed, Form 1442026-09-17: AMANDA WHALEN, Form 1442026-09-11: St. Ledger Susan, Form 1442026-08-31: Hallen Ed, Form 1442026-08-31: LANDON RAMON EDMOND, Form 1442026-08-28: LANDON EDMOND, Form 1442026-08-11: Summit Investors GE IX/VC IV (UK), L.P., Form 1442026-08-11: Summit Partners Co-Invest (Kiwi) L.P., Form 1442026-08-11: Summit Investors GE IX-VC IV, LLC, Form 1442026-08-11: Summit Partners Growth Equity Fund IX-B, L.P., Form 1442026-08-11: Summit Partners Growth Equity Fund IX-A, L.P., Form 1442026-06-18: AMANDA WHALEN, Form 1442026-05-26: ANDREW BIALECKI, Form 1442026-05-18: St. Ledger Susan, Form 1442026-04-20: LANDON RAMON EDMOND, Form 1442026-04-16: AMANDA WHALEN, Form 1442026-04-07: ANDREW BIALECKI, Form 1442026-03-17: STEPHEN E. ROWLAND, Form 1442026-03-12: LANDON RAMON EDMOND, Form 1442026-03-05: STEPHEN E. ROWLAND, Form 1442026-02-24: ANDREW BIALECKI, Form 1442025-12-18: LANDON RAMON EDMOND, Form 1442025-12-18: AMANDA WHALEN, Form 1442025-12-17: Hallen Ed, Form 1442025-12-15: Hallen Ed, Form 1442025-12-15: STEPHEN ROWLAND, Form 1442025-12-02: ANDREW BIALECKI, Form 1442025-11-20: LANDON RAMON EDMOND, Form 1442025-11-17: Galvin Carmel, Form 1442025-11-17: STEPHEN ROWLAND, Form 1442025-11-14: AMANDA WHALEN, Form 1442025-11-11: Hallen Ed, Form 1442025-11-10: Hallen Ed, Form 1442025-10-15: STEPHEN ROWLAND, Form 1442025-10-07: Bialecki Andrew, sold2025-10-10: Whalen Amanda, sold2025-10-14: Bialecki Andrew, sold2025-10-15: Rowland Stephen Eric, sold2025-11-10: Hallen Ed, sold2025-11-11: Bialecki Andrew, sold2025-11-14: Whalen Amanda, sold2025-11-17: Galvin Carmel, sold2025-11-17: Rowland Stephen Eric, sold2025-11-18: Bialecki Andrew, sold2025-11-20: Edmond Landon, sold2025-11-24: Bialecki Andrew, sold2025-12-02: Bialecki Andrew, sold2025-12-09: Bialecki Andrew, sold2025-12-15: Hallen Ed, sold2025-12-15: Rowland Stephen Eric, sold2025-12-16: Bialecki Andrew, sold2025-12-17: Hallen Ed, sold2025-12-18: Whalen Amanda, sold2025-12-18: Edmond Landon, sold2025-12-22: Bialecki Andrew, sold2026-01-06: Bialecki Andrew, sold2026-01-13: Bialecki Andrew, sold2026-01-15: Edmond Landon, sold2026-01-15: Whalen Amanda, sold2026-01-20: Bialecki Andrew, sold2026-01-27: Bialecki Andrew, sold2026-02-12: Ceran Jennifer, bought2026-02-13: Whalen Amanda, sold2026-02-24: Bialecki Andrew, sold2026-03-03: Bialecki Andrew, sold2026-03-05: Edmond Landon, sold2026-03-10: Bialecki Andrew, sold2026-03-12: Whalen Amanda, sold2026-03-12: Edmond Landon, sold2026-03-17: Bialecki Andrew, sold2026-03-24: Bialecki Andrew, sold2026-03-31: Bialecki Andrew, sold2026-04-07: Bialecki Andrew, sold2026-04-14: Bialecki Andrew, sold2026-04-16: Whalen Amanda, sold2026-04-20: Edmond Landon, sold2026-05-12: Bialecki Andrew, sold2026-05-14: Whalen Amanda, sold2026-05-18: St. Ledger Susan, sold2026-05-19: Bialecki Andrew, sold2026-05-26: Bialecki Andrew, sold2026-06-18: Whalen Amanda, sold
under a no plan named▼ sale▲ buysize is dollars

Form 144 notices, newest first

2026-09-24Hallen Ed, Officer, Director$22,124
1,300 shplan 2026-06-01Form 4s on file end Jun 23144 ↗
2026-09-17AMANDA WHALEN, Chief Financial Officer$681,660
42,000 shplan 2025-08-21Form 4s on file end Jun 23144 ↗
2026-09-11St. Ledger Susan, Director$37,085
2,328 shplan 2026-06-12Form 4s on file end Jun 23144 ↗
2026-08-31Hallen Ed, Officer, Director$2,022,971
98,782 shplan 2026-06-01Form 4s on file end Jun 23144 ↗
2026-08-31LANDON RAMON EDMOND, Chief Legal Officer$163,275
8,103 shplan 2026-06-01Form 4s on file end Jun 23144 ↗
2026-08-28LANDON EDMOND, Chief Legal Officer$1,048,606
53,473 shplan 2025-08-21Form 4s on file end Jun 23144 ↗
2026-08-11Summit Investors GE IX/VC IV (UK), L.P., 10% Stockholder$37,014
2,016 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-11Summit Partners Co-Invest (Kiwi) L.P., 10% Stockholder$3,345,376
182,210 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-11Summit Investors GE IX-VC IV, LLC, 10% Stockholder$285,149
15,531 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-11Summit Partners Growth Equity Fund IX-B, L.P., 10% Stockholder$33.9M
1,845,131 shno plan dateForm 4s on file end Jun 23144 ↗
2026-08-11Summit Partners Growth Equity Fund IX-A, L.P., 10% Stockholder$54.3M
2,955,112 shno plan dateForm 4s on file end Jun 23144 ↗
2026-06-18AMANDA WHALEN, Chief Financial Officer$565,320
42,000 shplan 2025-08-21144 ↗
Form 4, 2026-06-18: sold 14,000 at $13.23 Form 4 ↗
2026-05-26ANDREW BIALECKI, Co-Chief Executive Officer$3,160,306
212,529 shplan 2025-05-20144 ↗
Form 4, 2026-05-28: sold 212,529 at $14.61 Form 4 ↗
2026-05-18St. Ledger Susan, Director$133,196
9,334 shplan 2025-06-11144 ↗
Form 4, 2026-05-20: sold 9,334 at $14.27 Form 4 ↗
2026-04-20LANDON RAMON EDMOND, Chief Legal Officer$179,661
9,623 shplan 2025-08-21144 ↗
Form 4, 2026-04-22: sold 9,623 at $20.00 Form 4 ↗
2026-04-16AMANDA WHALEN, Chief Financial Officer$514,360
28,000 shplan 2025-08-21144 ↗
Form 4, 2026-04-17: sold 14,000 at $18.54 Form 4 ↗
2026-04-07ANDREW BIALECKI, Co-Chief Executive Officer$12.3M
637,778 shplan 2025-05-20144 ↗
Form 4, 2026-04-09: sold 200,000 at $18.63 Form 4 ↗
2026-03-17STEPHEN E. ROWLAND, President$94,848
4,940 shplan 2025-11-07no Form 4 on file144 ↗
2026-03-12LANDON RAMON EDMOND, Chief Legal Officer$285,309
14,366 shplan 2025-08-21144 ↗
Form 4, 2026-03-13: sold 14,366 at $20.15 Form 4 ↗
2026-03-05STEPHEN E. ROWLAND, President$96,478
4,940 shplan 2025-11-07no Form 4 on file144 ↗
2026-02-24ANDREW BIALECKI, Co-Chief Executive Officer$21.4M
1,350,000 shplan 2025-05-20144 ↗
Form 4, 2026-02-26: sold 200,000 at $16.76 Form 4 ↗
2025-12-18LANDON RAMON EDMOND, Chief Legal Officer$1,178,097
39,283 shplan 2025-08-21144 ↗
Form 4, 2025-12-19: sold 14,190 at $31.38 Form 4 ↗
2025-12-18AMANDA WHALEN, Chief Financial Officer$1,679,440
56,000 shplan 2025-08-21144 ↗
Form 4, 2025-12-19: sold 14,000 at $31.38 Form 4 ↗
2025-12-17Hallen Ed, Officer, Director$3,568,942
117,550 shplan 2025-06-12144 ↗
Form 4, 2025-12-19: sold 117,550 at $30.36 Form 4 ↗
2025-12-15Hallen Ed, Officer, Director$22,823
757 shplan 2025-06-12144 ↗
Form 4, 2025-12-17: sold 757 at $30.15 Form 4 ↗
2025-12-15STEPHEN ROWLAND, President$423,967
14,208 shplan 2024-11-22no Form 4 on file144 ↗
2025-12-02ANDREW BIALECKI, Co-Chief Executive Officer$38.0M
1,350,000 shplan 2025-05-20144 ↗
Form 4, 2025-12-04: sold 142,997 at $28.63 Form 4 ↗
2025-11-20LANDON RAMON EDMOND, Chief Legal Officer$396,411
14,394 shplan 2025-08-21144 ↗
Form 4, 2025-11-21: sold 14,394 at $27.59 Form 4 ↗
2025-11-17Galvin Carmel, Chief People Officer$319,285
11,156 shplan 2024-11-26144 ↗
Form 4, 2025-11-18: sold 11,156 at $27.51 Form 4 ↗
2025-11-17STEPHEN ROWLAND, President$203,245
7,104 shplan 2024-11-22144 ↗
Form 4, 2025-11-18: sold 7,104 at $27.39 Form 4 ↗
2025-11-14AMANDA WHALEN, Chief Financial Officer$427,200
15,000 shplan 2024-08-16144 ↗
Form 4, 2025-11-18: sold 15,000 at $28.60 Form 4 ↗
2025-11-11Hallen Ed, Officer, Director$84,332
2,811 shplan 2025-06-12no Form 4 on file144 ↗
2025-11-10Hallen Ed, Officer, Director$1,787,421
59,492 shplan 2025-06-12144 ↗
Form 4, 2025-11-12: sold 62,303 at $30.04 Form 4 ↗
2025-10-15STEPHEN ROWLAND, President$173,646
7,105 shplan 2024-11-22144 ↗
Form 4, 2025-10-16: sold 7,105 at $24.35 Form 4 ↗