Who owns Klaviyo Inc, from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).
Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.
Shopify Strategic Holdings 3 LLC: 20.8% · 33,405,047 shares — Shopify Inc.: 20.8% · 33,405,047 shares
FMR LLC: 4.7% · 6,566,154 shares — Abigail P. Johnson: 4.7% · 6,566,154 shares
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Sign up freeEvery institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of Klaviyo Inc they hold. Together these 374 managers report 62.30% of shares outstanding.
| Investor | Position value | Shares | % of their portfolio | % of company | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | $466M | 14,361,540 | 0.01% | 4.84% | December 31, 2025 |
| SUMMIT PARTNERS L P | $285M | 18,852,778 | 46.75% | 6.35% | June 30, 2026 |
372 more institutional holders behind a free account
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Sign up freeFunds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together these 188 funds hold 21.70% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.
| Fund | Position value | % of net assets | % of company | As of |
|---|---|---|---|---|
| Select Software and IT Services Portfolio | $117M | 1.75% | 2.27% | February 28, 2026 |
| VANGUARD EXPLORER FUND | $108M | 0.50% | 1.82% | April 30, 2026 |
186 more funds behind a free account
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