BIALECKI ANDREW

PrivateCIK: 1991099
Location

BOSTON, MA

Senior insider sale

Co-Chief Executive Officer at KLAVIYO, INC. — senior position signals high conviction

$76.39M

3.74M shares

What this filing means

BIALECKI ANDREW plans to sell 3.74M shares of KLAVIYO, INC. valued at approximately $76.39M. Form 144 is a notice of intent to sell restricted or control securities — not a mandatory transaction. This filing provides advance warning of potential selling pressure.

InsiderBIALECKI ANDREWCIK 1991099
IssuerKLAVIYO, INC.CIK 1835830
DirectorOfficer10% Owner· Co-Chief Executive Officer
Since Mar 2026
3.74M
Shares to sell
$76.39M
Approx. market value
637.78K
Acquired (3 months)
1
Planned
62 completed
Securities Acquired — Last 3 Months1
Sort

Previously Exercised Stock Options

Cash

5/14/2025
637.78K
Total acquired637.78K
Planned & Completed Dispositions63
Sort

Completed

Completed

Units to sell

23.80K

Market value

$453.9K

4/6/2026
Completed

Units to sell

23.80K

Market value

$455.9K

4/2/2026
Completed

Units to sell

23.80K

Market value

$459.6K

4/1/2026
Completed

Units to sell

23.80K

Market value

$459.2K

3/31/2026
Completed

Units to sell

200K

Market value

$3.88M

3/31/2026
Completed

Units to sell

71.40K

Market value

$1.36M

3/30/2026
Completed

Units to sell

23.80K

Market value

$428.3K

3/25/2026
Completed

Units to sell

200K

Market value

$3.63M

3/24/2026
Completed

Units to sell

23.80K

Market value

$432.3K

3/24/2026
Completed

Units to sell

23.80K

Market value

$443.7K

3/23/2026
Completed

Units to sell

23.80K

Market value

$444.0K

3/20/2026
Completed

Units to sell

23.80K

Market value

$446.5K

3/19/2026
Completed

Units to sell

23.80K

Market value

$446.5K

3/18/2026
Completed

Units to sell

23.80K

Market value

$456.5K

3/17/2026
Completed

Units to sell

200K

Market value

$3.87M

3/17/2026
Completed

Units to sell

23.80K

Market value

$455.6K

3/16/2026
Completed

Units to sell

71.40K

Market value

$1.35M

3/13/2026
Completed

Units to sell

206.83K

Market value

$4.13M

3/10/2026
Completed

Units to sell

23.80K

Market value

$479.0K

3/10/2026
Completed

Units to sell

23.80K

Market value

$490.2K

3/9/2026
Completed

Units to sell

23.80K

Market value

$506.4K

3/6/2026
Completed

Units to sell

23.80K

Market value

$496.6K

3/5/2026
Completed

Units to sell

23.80K

Market value

$463.9K

3/4/2026
Completed

Units to sell

23.80K

Market value

$450.8K

3/3/2026
Completed

Units to sell

200K

Market value

$3.73M

3/3/2026
Completed

Units to sell

23.80K

Market value

$433.0K

3/2/2026
Completed

Units to sell

47.60K

Market value

$833.6K

2/27/2026
Completed

Units to sell

23.80K

Market value

$397.0K

2/25/2026
Completed

Units to sell

23.80K

Market value

$390.4K

2/24/2026
Completed

Units to sell

200K

Market value

$3.35M

2/24/2026
Completed

Units to sell

23.80K

Market value

$373.0K

2/23/2026
Completed

Units to sell

23.80K

Market value

$423.2K

2/20/2026
Completed

Units to sell

23.80K

Market value

$429.1K

2/19/2026
Completed

Units to sell

23.80K

Market value

$428.4K

2/18/2026
Completed

Units to sell

23.80K

Market value

$413.4K

2/17/2026
Completed

Units to sell

47.60K

Market value

$898.4K

2/13/2026
Completed

Units to sell

23.80K

Market value

$507.2K

2/11/2026
Completed

Units to sell

23.80K

Market value

$495.7K

2/10/2026
Completed

Units to sell

23.80K

Market value

$466.3K

2/9/2026
Completed

Units to sell

23.80K

Market value

$457.9K

2/6/2026
Completed

Units to sell

23.80K

Market value

$474.0K

2/5/2026
Completed

Units to sell

47.60K

Market value

$962.8K

2/4/2026
Completed

Units to sell

23.80K

Market value

$534.3K

2/2/2026
Completed

Units to sell

23.80K

Market value

$531.0K

1/30/2026
Completed

Units to sell

23.80K

Market value

$545.8K

1/29/2026
Completed

Units to sell

23.80K

Market value

$611.5K

1/28/2026
Completed

Units to sell

23.80K

Market value

$603.7K

1/27/2026
Completed

Units to sell

155.22K

Market value

$3.93M

1/27/2026
Completed

Units to sell

23.80K

Market value

$613.1K

1/26/2026
Completed

Units to sell

23.80K

Market value

$611.1K

1/23/2026
Completed

Units to sell

23.80K

Market value

$624.0K

1/22/2026
Completed

Units to sell

23.80K

Market value

$597.4K

1/21/2026
Completed

Units to sell

167.93K

Market value

$4.06M

1/20/2026
Completed

Units to sell

23.80K

Market value

$576.8K

1/20/2026
Completed

Units to sell

23.80K

Market value

$582.6K

1/16/2026
Completed

Units to sell

23.80K

Market value

$605.2K

1/15/2026
Completed

Units to sell

23.80K

Market value

$635.4K

1/14/2026
Completed

Units to sell

23.80K

Market value

$652.4K

1/13/2026
Completed

Units to sell

140.65K

Market value

$3.85M

1/13/2026
Completed

Units to sell

23.80K

Market value

$672.4K

1/12/2026
Completed

Units to sell

23.80K

Market value

$667.6K

1/9/2026
Completed

Units to sell

23.80K

Market value

$668.5K

1/8/2026

Planned — Approximate Date

NYSEPlanned

Units to sell

637.78K

Market value

$12.25M

4/7/2026
Total

Units

3.74M

Value

$76.39M

BIALECKI ANDREW — Planned Insider Sale (Form 144) | Finecho