Security key
49845K101
- Security type / class
- Equity / Series A Common Stock
- Total 13F shares
- 154,309,639
- Total 13F value
- $3,000,749,927
- Share change
- +391,184
- Put/Call ratio
- 54%
- SEC-reported price per share
- $19.46
- Number of holders
- 263
- Value change
- -$129,552,223
- Number of buys
- 168
- Number of sells
- 105
- Shares outstanding
- 160,369,885
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
Q1 2026
Institutions
263
Top holders
10
KVYO full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2026
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. - Series A 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
Hallen Ed
Disclosed value leader
Hallen Ed
Comparable rows
11/15
Latest evidence
31 Dec 2025
13D/G
13F
3/4/5
Lead comparable stake: 19%
4 rows are not safely comparable across share classes.
13D/G row: Hallen Ed
Showing 1-6 of 15 holder rows.
Quick read
Hallen Ed leads the comparable SEC ownership view at 19%.
11 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 Hallen Ed's linked filing trail.
Comparable ownership
Top 5
Hallen Ed
19%
SUMMIT PARTNERS L P
12%
Accomplice Fund I, L.P.
10%
VANGUARD GROUP INC
10%
Capital International Investors
8%
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 |
|---|---|---|---|---|---|
| Hallen Ed |
13D/G
|
19%
Reported 13D/G
· 30 Sep 2025
|
$910,422,224
32,879,098 shares
|
$0 | 30 Sep 2025 |
| SUMMIT PARTNERS L P |
13F
13D/G
Company
|
12%
Reported 13D/G
· 30 Sep 2025
|
$612,149,702
18,852,778 shares
|
— | 31 Dec 2025 |
| Accomplice Fund I, L.P. |
13D/G
3/4/5
Jeff Fagnan · 10%+ Owner
|
10%
Reported 13D/G
· 31 Mar 2025
|
$322,309,237
11,137,154 shares
|
$0 | 31 Mar 2025 |
| VANGUARD GROUP INC |
13F
13D/G
Company · The Vanguard Group
|
10%
Reported 13D/G
· 30 Jun 2025
|
$466,319,204
14,361,540 shares
|
— | 31 Dec 2025 |
| Capital International Investors |
13F
13D/G
Company
|
8%
Reported 13D/G
· 31 Mar 2026
|
$415,253,830
12,788,846 shares
|
— | 31 Dec 2025 |
| Accel Growth Fund V L.P. |
13D/G
Ping Li ("PL")
|
4.9%
Reported 13D/G
· 31 Mar 2025
|
$134,813,025
4,658,363 shares
|
+$1,126,576 | 31 Mar 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 Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
263
Shares
154,309,639
Rows available
263
| 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 Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
263
Q1 2026 holders
263
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend