144
0001991099
XXXXXXXX
LIVE
0001835830
KLAVIYO, INC.
001-41806
125 Summer Street, 6th Floor
Boston
MA
02110
6172131788
ANDREW BIALECKI
Director
Officer
10% Stockholder
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
637778
12251715.38
145497436
04/07/2026
NYSE
Common
05/14/2025
Previously Exercised Stock Options
Issuer
N
637778
05/14/2025
Cash
N
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
04/06/2026
23800
453873.14
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
04/02/2026
23800
455858.06
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
04/01/2026
23800
459620.84
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/31/2026
200000
3883060.00
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/31/2026
23800
459161.50
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/30/2026
71400
1364860.98
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/25/2026
23800
428257.20
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/24/2026
200000
3633200.00
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/24/2026
23800
432303.20
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/23/2026
23800
443748.62
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/20/2026
23800
444027.08
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/19/2026
23800
446480.86
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/18/2026
23800
446480.86
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/17/2026
200000
3874580.00
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/17/2026
23800
456467.34
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/16/2026
23800
455591.50
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/13/2026
71400
1345818.60
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/10/2026
206827
4127605.07
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/10/2026
23800
478998.80
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/09/2026
23800
490225.26
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/06/2026
23800
506380.70
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/05/2026
23800
496641.74
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/04/2026
23800
463935.78
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/03/2026
200000
3727580.00
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/03/2026
23800
450783.90
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
03/02/2026
23800
433000.54
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/27/2026
47600
833633.08
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/25/2026
23800
397024.46
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/24/2026
200000
3353340.00
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/24/2026
23800
390381.88
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/23/2026
23800
373010.26
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/20/2026
23800
423187.80
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/19/2026
23800
429073.54
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/18/2026
23800
428404.76
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/17/2026
23800
413398.86
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/13/2026
47600
898416.68
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/11/2026
23800
507218.46
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/10/2026
23800
495746.86
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/09/2026
23800
466294.36
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/06/2026
23800
457888.20
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/05/2026
23800
473965.10
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/04/2026
47600
962838.52
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
02/02/2026
23800
534331.42
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/30/2026
23800
530975.62
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/29/2026
23800
545812.54
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/28/2026
23800
611524.34
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/27/2026
155219
3930905.65
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/27/2026
23800
603720.32
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/26/2026
23800
613071.34
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/23/2026
23800
611119.74
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/22/2026
23800
623964.60
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/21/2026
23800
597410.94
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/20/2026
167926
4056067.81
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/20/2026
23800
576766.82
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/16/2026
23800
582616.86
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/15/2026
23800
605236.38
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/14/2026
23800
635402.88
10b5-1 Sales for ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/13/2026
140646
3854684.92
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/13/2026
23800
652369.90
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/12/2026
23800
672371.42
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/09/2026
23800
667630.46
ANDREW BIALECKI
125 Summer Street, 6th Floor
Boston
MA
02110
Common
01/08/2026
23800
668456.32
04/07/2026
05/20/2025
/s/ Andrew Bialecki