Andrew Bialecki owns 26.46% of Klaviyo
75,326,229 shares as of the May 26, 2026 filing, worth $1.3B at the latest close.
KVYO · $4.9B market cap · Founder-ledGet an email when Andrew Bialecki’s stake moves.
Free.
The stake
26.46%
worth $1.3B at the latest close
Stake rank
#83
by dollar value of the stake
Last sale
146 days ago
May 26, 2026
Last buy
None
no purchases since 2025
Andrew Bialecki owns 26.46% of Klaviyo, Inc.: 75,326,229 of 284,727,437 shares, worth about $1.3B at the 2026-10-16 close. The stake has moved from 29.93% in 2023 to 26.46% on 2026-06-30, across 31 sales and 0 purchases that moved it since 2016. The last trade that moved it was a planned sale of $3.1M on 2026-05-26.
How the stake is held
as of the May 26, 2026 filing
SHARES
OF THE STAKE
SERIES B · stated May 26, 2026 · Form 4 ↗
HELD DIRECTLY
66,731,589
88.6%
HELD INDIRECTLY · 4 VEHICLES
8,594,640
11.4%
By The Andrew P. Bialecki Grantor Retained Annuity Trust I of 2023
7,517,410
10.0%
By The Elizabeth L. Bialecki Irrevocable GST Trust of 2023
517,006
0.7%
By The Andrew P. Bialecki Irrevocable GST Trust of 2023
517,006
0.7%
By spouse
43,218
0.1%
THE STAKE
75,326,229
26.46%