Bialecki Andrew

Insider Reports History

Reporting-owner location: Boston, MA
Latest reporting-owner signature: /s/ Landon Edmond, Attorney-in-Fact
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Bialecki Andrew

Form 4 holding Co-Chief Executive Officer, Director, 10%+ Owner

Klaviyo, Inc.

Security class: Series B Common Stock
Shares / value: 66,731,589
Estimated value: $1,310,516,536
Report date: 26 May 2026
Price: $19.46
Ownership: Direct
Underlying class: Series A Common Stock
Underlying amount: 67,344,118

Form 4 holding Co-Chief Executive Officer, Director, 10%+ Owner

Klaviyo, Inc.

Security class: Series B Common Stock
Shares / value: 7,517,410
Estimated value: $146,288,798
Report date: 26 May 2026
Price: $19.46
Ownership: By The Andrew P. Bialecki Grantor Retained Annuity Trust I of 2023
Underlying class: Series A Common Stock
Underlying amount: 7,517,410

Form 4 holding Co-Chief Executive Officer, Director, 10%+ Owner

Klaviyo, Inc.

Security class: Series B Common Stock
Shares / value: 517,006
Estimated value: $10,060,936
Report date: 26 May 2026
Price: $19.46
Ownership: By The Andrew P. Bialecki Irrevocable GST Trust of 2023
Underlying class: Series A Common Stock
Underlying amount: 517,006

Form 4 holding Co-Chief Executive Officer, Director, 10%+ Owner

Klaviyo, Inc.

Security class: Series B Common Stock
Shares / value: 517,006
Estimated value: $10,060,936
Report date: 26 May 2026
Price: $19.46
Ownership: By The Elizabeth L. Bialecki Irrevocable GST Trust of 2023
Underlying class: Series A Common Stock
Underlying amount: 517,006

Form 4 holding Co-Chief Executive Officer, Director, 10%+ Owner

Klaviyo, Inc.

Security class: Series B Common Stock
Shares / value: 43,218
Estimated value: $841,022
Report date: 26 May 2026
Price: $19.46
Ownership: By spouse
Underlying class: Series A Common Stock
Underlying amount: 43,218

Form 4 holding Co-Chief Executive Officer, Director, 10%+ Owner

Klaviyo, Inc.

Security class: Series A Common Stock
Shares / value: 0
Estimated value: $0
Report date: 26 May 2026
Price: $14.61
Ownership: Direct

Form 4 holding Co-Chief Executive Officer, Director, 10%+ Owner

Klaviyo, Inc.

Security class: Stock Option (Right to Buy)
Shares / value: 0
Estimated value
Report date: 14 May 2025
Price
Ownership: Direct
Underlying class: Series B Common Stock
Underlying amount

Insider Reports Filed by Bialecki Andrew

4 KVYO

Klaviyo, Inc.

Report period: 26 May 2026
Transactions: 3
Transaction value: -$3,105,049
Accepted by SEC: 28 May 2026, 20:08
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 19 May 2026
Transactions: 3
Transaction value: -$2,976,000
Accepted by SEC: 20 May 2026, 20:03
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 12 May 2026
Transactions: 4
Transaction value: -$2,921,929
Accepted by SEC: 14 May 2026, 20:06
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 14 Apr 2026
Transactions: 4
Transaction value: -$3,437,114
Accepted by SEC: 16 Apr 2026, 20:04
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 07 Apr 2026
Transactions: 3
Transaction value: -$3,726,000
Accepted by SEC: 09 Apr 2026, 20:04
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 31 Mar 2026
Transactions: 3
Transaction value: -$3,884,000
Accepted by SEC: 02 Apr 2026, 20:04
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 24 Mar 2026
Transactions: 3
Transaction value: -$3,634,000
Accepted by SEC: 26 Mar 2026, 20:01
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 17 Mar 2026
Transactions: 4
Transaction value: -$3,873,821
Accepted by SEC: 19 Mar 2026, 19:59
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 10 Mar 2026
Transactions: 4
Transaction value: -$4,127,833
Accepted by SEC: 12 Mar 2026, 21:47
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 03 Mar 2026
Transactions: 4
Transaction value: -$3,727,861
Accepted by SEC: 05 Mar 2026, 21:32
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 24 Feb 2026
Transactions: 4
Transaction value: -$3,352,971
Accepted by SEC: 26 Feb 2026, 21:30
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 27 Jan 2026
Transactions: 4
Transaction value: -$3,931,437
Accepted by SEC: 29 Jan 2026, 16:29
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 20 Jan 2026
Transactions: 4
Transaction value: -$4,056,400
Accepted by SEC: 22 Jan 2026, 16:29
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 13 Jan 2026
Transactions: 4
Transaction value: -$3,854,835
Accepted by SEC: 15 Jan 2026, 18:02
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 06 Jan 2026
Transactions: 7
Transaction value: -$4,475,299
Accepted by SEC: 08 Jan 2026, 16:31
Role: Co-Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 22 Dec 2025
Transactions: 4
Transaction value: -$3,297,303
Accepted by SEC: 23 Dec 2025, 16:06
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 16 Dec 2025
Transactions: 6
Transaction value: -$7,066,338
Accepted by SEC: 17 Dec 2025, 17:24
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 09 Dec 2025
Transactions: 13
Transaction value: -$6,874,073
Accepted by SEC: 11 Dec 2025, 16:22
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 02 Dec 2025
Transactions: 6
Transaction value: -$4,093,888
Accepted by SEC: 04 Dec 2025, 18:50
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 24 Nov 2025
Transactions: 3
Transaction value: -$4,017,344
Accepted by SEC: 26 Nov 2025, 16:12
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 18 Nov 2025
Transactions: 3
Transaction value: -$4,001,456
Accepted by SEC: 20 Nov 2025, 16:10
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 11 Nov 2025
Transactions: 3
Transaction value: -$4,177,399
Accepted by SEC: 13 Nov 2025, 16:24
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 14 Oct 2025
Transactions: 3
Transaction value: -$3,980,376
Accepted by SEC: 16 Oct 2025, 16:09
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 07 Oct 2025
Transactions: 4
Transaction value: -$4,035,088
Accepted by SEC: 09 Oct 2025, 16:01
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 30 Sep 2025
Transactions: 7
Transaction value: -$3,960,362
Accepted by SEC: 02 Oct 2025, 16:06
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 23 Sep 2025
Transactions: 4
Transaction value: -$7,492,236
Accepted by SEC: 25 Sep 2025, 16:11
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 16 Sep 2025
Transactions: 4
Transaction value: -$7,323,767
Accepted by SEC: 17 Sep 2025, 16:38
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 09 Sep 2025
Transactions: 3
Transaction value: -$7,046,573
Accepted by SEC: 11 Sep 2025, 16:06
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 02 Sep 2025
Transactions: 4
Transaction value: -$6,922,959
Accepted by SEC: 04 Sep 2025, 16:15
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 26 Aug 2025
Transactions: 7
Transaction value: -$7,140,299
Accepted by SEC: 28 Aug 2025, 16:08
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 11 Jun 2025
Transactions: 3
Transaction value: $0
Accepted by SEC: 11 Jun 2025, 16:27
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

4 KVYO

Klaviyo, Inc.

Report period: 14 May 2025
Transactions: 6
Transaction value: -$360,559,956
Accepted by SEC: 16 May 2025, 20:59
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

3 KVYO

Klaviyo, Inc.

Report period: 20 Sep 2023
Transactions: 0
Transaction value: $0
Accepted by SEC: 20 Sep 2023, 16:27
Role: Chief Executive Officer, Director, 10%+ Owner
Next action: Open filing details

Insider Reports History

Continue from this owner filing history

Reported holdings for Bialecki Andrew

Insider Reports Filed by Bialecki Andrew