Security key
49845K101
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 158,333,933
- Total 13F value
- $5,141,097,969
- Share change
- +17,333,727
- Put/Call ratio
- 55%
- SEC-reported price per share
- $32.47
- Number of holders
- 261
- Value change
- +$589,644,045
- Number of buys
- 145
- Number of sells
- 147
- Shares outstanding
- 146,298,238
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
261
Top holders
10
KVYO full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
Klaviyo, Inc. SEC filings
Klaviyo, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 49845K101
Recent filing periods:
Ownership snapshot
Top reported holders of KVYO - Klaviyo, Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Bialecki Andrew
Disclosed value leader
Bialecki Andrew
Comparable rows
15/15
Latest evidence
31 Dec 2025
13D/G
3/4/5
13F
Lead comparable stake: 35%
13D/G row: Bialecki Andrew
Showing 1-6 of 15 holder rows.
Quick read
Bialecki Andrew leads the comparable SEC ownership view at 35%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Bialecki Andrew's linked filing trail.
Comparable ownership
Top 5
Bialecki Andrew
35%
Hallen Ed
19%
SHOPIFY INC.
19%
SUMMIT PARTNERS L P
12%
Accomplice Fund I, L.P.
10%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Bialecki Andrew |
13D/G
|
35%
|
$2,233,913,659
78,163,529 shares
|
-$139,680,634 | 31 Dec 2025 |
| Hallen Ed |
13D/G
3/4/5
Director, 10%+ Owner
|
19%
|
$910,422,224
32,879,098 shares
|
$0 | 30 Sep 2025 |
| SHOPIFY INC. |
13D/G
Shopify Strategic Holdings 3 LLC
|
19%
|
$886,841,973
32,027,518 shares
|
+$28,607,813 | 29 Aug 2025 |
| SUMMIT PARTNERS L P |
13F
13D/G
3/4/5
Company · 10%+ Owner
|
12%
from 13D/G
|
$522,033,423
18,852,778 shares
|
— | 30 Sep 2025 |
| Accomplice Fund I, L.P. |
13D/G
3/4/5
Jeff Fagnan · 10%+ Owner
|
10%
|
$322,309,237
11,137,154 shares
|
$0 | 31 Mar 2025 |
| VANGUARD GROUP INC |
13D/G
13F
The Vanguard Group · Company
|
10%
|
$365,938,152
10,728,178 shares
|
$0 | 30 Jun 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
261
Shares
158,333,933
Rows available
261
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
274
Q4 2025 holders
261
Holder diff
-13
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend