Andrew Bialecki

Insider Reports History

Location: Klaviyo, Inc., 125 Summer Street, 6 Th Floor, Boston, MA
Signature: /s/ Landon Edmond, Attorney-in-Fact
All insider transactions: Transactions in reports broken out by “transaction date” reported in original SEC filing, see here for transactions aggregated across transaction date

Holdings reported by Andrew Bialecki:

Stock	Role	Class	Num Shares	Value	Price $	Report Date	Ownership
Klaviyo, Inc.	Chief Executive Officer, Director, 10%+ Owner	Series B Common Stock	74.8M	$2.35B	$31.43	Sep 16, 2025	Direct
Klaviyo, Inc.	Chief Executive Officer, Director, 10%+ Owner	Series B Common Stock	7.52M	$236M	$31.43	Sep 16, 2025	By The Andrew P. Bialecki Grantor Retained Annuity Trust I of 2023
Klaviyo, Inc.	Chief Executive Officer, Director, 10%+ Owner	Series B Common Stock	517K	$16.2M	$31.43	Sep 16, 2025	By The Andrew P. Bialecki Irrevocable GST Trust of 2023
Klaviyo, Inc.	Chief Executive Officer, Director, 10%+ Owner	Series B Common Stock	517K	$16.2M	$31.43	Sep 16, 2025	By The Elizabeth L. Bialecki Irrevocable GST Trust of 2023
Klaviyo, Inc.	Chief Executive Officer, Director, 10%+ Owner	Series B Common Stock	43.2K	$1.36M	$31.43	Sep 16, 2025	By spouse
Klaviyo, Inc.	Chief Executive Officer, Director, 10%+ Owner	Series A Common Stock	0	$0	$31.76	Sep 16, 2025	Direct
Klaviyo, Inc.	Chief Executive Officer, Director, 10%+ Owner	Stock Option (Right to Buy)	0			May 14, 2025	Direct

Showing 1 to 7 of 7 entries

Insider Reports Filed by Andrew Bialecki

Symbol	Company	Period	Transactions	Value $	Form Type	Date Filed	Role
KVYO	Klaviyo, Inc.	Sep 16, 2025	4	-$7.32M	4	Sep 17, 2025	Chief Executive Officer, Director, 10%+ Owner
KVYO	Klaviyo, Inc.	Sep 9, 2025	3	-$7.05M	4	Sep 11, 2025	Chief Executive Officer, Director, 10%+ Owner
KVYO	Klaviyo, Inc.	Sep 2, 2025	4	-$6.92M	4	Sep 4, 2025	Chief Executive Officer, Director, 10%+ Owner
KVYO	Klaviyo, Inc.	Aug 26, 2025	7	-$7.14M	4	Aug 28, 2025	Chief Executive Officer, Director, 10%+ Owner
KVYO	Klaviyo, Inc.	Jun 11, 2025	3	$0	4	Jun 11, 2025	Chief Executive Officer, Director, 10%+ Owner
KVYO	Klaviyo, Inc.	May 14, 2025	6	-$361M	4	May 16, 2025	Chief Executive Officer, Director, 10%+ Owner
KVYO	Klaviyo, Inc.	Sep 20, 2023	0	$0	3	Sep 20, 2023	Chief Executive Officer, Director, 10%+ Owner