WHALEN AMANDA (Chief Financial Officer) sold 1.5% of their position (14K shares) of KLAVIYO, INC. on the open market

Open‑market sale worth $259.6K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

WHALEN AMANDA

Filed: 4/18/2026ACC: 0001470831-26-000380

InsiderWHALEN AMANDACIK 1991131

→

IssuerKLAVIYO, INC.CIK 1835830

Officer· Chief Financial Officer

Since Feb 2026

+478.42K

Net shares

Net buyer

$259.6K

Total sold

Open market trades

0B · 1S

Total transactions

496.72K acquired · 18.29K disposed

Non-Derivative Transactions4

Series A Common Stock

Direct

A · Award

+265.15K

Price / share

—

Trade value

—

% of position

64.3%

4/15/2026

412.43K→677.58K

Series A Common Stock

Direct

A · Award

+227.27K

Price / share

—

Trade value

—

% of position

33.5%

4/15/2026

677.58K→904.85K

Series A Common Stock

Direct

C · Conversion

+4.29K

Price / share

—

Trade value

—

% of position

0.5%

4/16/2026

904.85K→909.14K

Series A Common Stock

Direct

S · Sale

−14K

Price / share

$18.54

Trade value

$259.56K

% of position

1.5%

4/16/2026

909.14K→895.14K

Total

Net shares

+482.72K

Net value

-$259.56K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Series A Common Stock Direct	4/15/2026	A · Award	+265.15K	—	—	64.3%	412.43K	677.58K
Series A Common Stock Direct	4/15/2026	A · Award	+227.27K	—	—	33.5%	677.58K	904.85K
Series A Common Stock Direct	4/16/2026	C · Conversion	+4.29K	—	—	0.5%	904.85K	909.14K
Series A Common Stock Direct	4/16/2026	S · Sale	−14K	$18.54	$259.56K	1.5%	909.14K	895.14K
Total			+482.72K		-$259.56K

Derivative Transactions1

Series B Common Stock

Direct

C · Conversion

Converts to

Series A Common Stock

4.29K shares

−4.29K

Strike price

Held after

297.11K

Exercisable

—

4/16/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Series B Common Stock Direct	Series A Common Stock4.29K shares	4/16/2026	C · Conversion	−4.29K		—	297.11K