BIALECKI ANDREW

PrivateCIK: 1991099
Location

BOSTON, MA

BIALECKI ANDREW (Co-Chief Executive Officer) sold 200K shares of KLAVIYO, INC. on the open market

Open‑market sale worth $3.63M. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale
InsiderBIALECKI ANDREWCIK 1991099
IssuerKLAVIYO, INC.CIK 1835830
DirectorOfficer10% Owner· Co-Chief Executive Officer
Since Mar 2026
-200K
Net shares
Net seller
$3.63M
Total sold
1
Open market trades
0B · 1S
3
Total transactions
200K acquired · 400K disposed
Non-Derivative Transactions2

Series A Common Stock

Direct
C · Conversion

Shares

+200K

Price / share

Trade value

% of position

New position
3/24/2026
0.00200K

Series A Common Stock

Direct
S · Sale

Shares

200K

Price / share

$18.17

Trade value

$3.63M

% of position

New position
3/24/2026
200K0.00
Total

Net shares

+0.00

Net value

-$3.63M

Derivative Transactions1

Series B Common Stock

Direct
C · Conversion
Converts to

Series A Common Stock

200K shares

Shares

200K

Strike price

Held after

67.94M

Exercisable

3/24/2026
Non-Derivative Holdings (Post-Transaction)0
No non-derivative holdings reported
Derivative Holdings (Post-Transaction)4

Series B Common Stock

Indirect
Underlying security
Series A Common Stock

Underlying shares

517.01K

Shares owned

517.01K

Exercise price

Expiration

Exercise window

Series B Common Stock

Indirect
Underlying security
Series A Common Stock

Underlying shares

517.01K

Shares owned

517.01K

Exercise price

Expiration

Exercise window

Series B Common Stock

Indirect
Underlying security
Series A Common Stock

Underlying shares

7.52M

Shares owned

7.52M

Exercise price

Expiration

Exercise window

Series B Common Stock

Indirect
Underlying security
Series A Common Stock

Underlying shares

43.22K

Shares owned

43.22K

Exercise price

Expiration

Exercise window

Total

Underlying

8.59M

Owned

8.59M

BIALECKI ANDREW — Insider Transaction (Form 4) Filed Mar 26, 2026 | Finecho