Latest Period
Q1 2026
Security Snapshot
Klaviyo, Inc. - Common Stock (KVYO) Institutional Ownership
CUSIP: 49845K101
13F Institutional Holders and Ownership History from Q3 2023 to Q1 2026
Institutions Reporting
260
Shares (Excl. Options)
154,261,468
Price
$19.46
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- Security type / class
- Equity / Common Stock
- Symbol
- KVYO on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 154,261,468
- Total 13F value
- $2,999,812,271
- Portfolio coverage rank
- 0%
- Share change
- +375,050
- Value change
- -$129,865,991
- Number of holders
- 260
- Shares outstanding
- 146,298,238
- SEC-reported price per share
- $14.45
- Insider filing price
- $14.45
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- KVYO - Klaviyo, Inc. - Common Stock is tracked under CUSIP 49845K101.
- 260 institutions reported positions in Q1 2026.
- 14 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 260 to 260 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $5,141,097,417 to $2,999,812,271.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 260 institutions filings for Q1 2026.
Security key
49845K101
Latest holder period
Q1 2026
13F holders
260
13D/G owners
14
CIK / CUSIP context first
Open Q1 2026 holders
KVYO full holder history
Klaviyo, Inc. SEC filings
Klaviyo, Inc. company facts
Klaviyo, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 49845K101:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
14
Security
KVYO
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Bialecki Andrew | 35% | -6.8% | $2,233,913,659 | -$139,680,634 | 78,163,529 | -5.9% | Bialecki Andrew | 31 Dec 2025 |
| Hallen Ed | 19% | $910,422,224 | 32,879,098 | Hallen Ed | 30 Sep 2025 | |||
| SHOPIFY INC. | 19% | -26% | $886,841,973 | +$28,607,813 | 32,027,518 | +3.3% | Shopify Strategic Holdings 3 LLC | 29 Aug 2025 |
| SUMMIT PARTNERS L P | 12% | -42% | $522,033,423 | -$331,587,750 | 18,852,778 | -39% | Summit Partners, L.P. | 30 Sep 2025 |
| Capital International Investors | 8% | -14% | $208,211,652 | -$19,301,919 | 11,703,859 | -8.5% | Capital International Investors | 31 Mar 2026 |
| Accomplice Fund I, L.P. | 10% | $322,309,237 | 11,137,154 | Jeff Fagnan | 31 Mar 2025 | |||
| VANGUARD GROUP INC | 10% | $365,938,152 | 10,728,178 | The Vanguard Group | 30 Jun 2025 | |||
| FMR LLC | 6.7% | $228,166,449 | 8,240,031 | FMR LLC | 30 Sep 2025 | |||
| MORGAN STANLEY | 4.1% | -58% | $114,614,818 | -$163,643,000 | 5,988,235 | -59% | Morgan Stanley | 28 Feb 2026 |
| Accel Growth Fund V L.P. | 4.9% | -12% | $134,813,025 | +$1,126,576 | 4,658,363 | +0.84% | Ping Li ("PL") | 31 Mar 2025 |
| Sands Capital Ventures, LLC | 4.9% | $127,806,680 | 4,416,264 | SANDS FRANK M. | 31 Mar 2025 | |||
| ALLIANCEBERNSTEIN L.P. | 4.4% | -14% | $116,317,963 | +$667,472 | 4,019,280 | +0.58% | AllianceBernstein L.P. | 31 Mar 2025 |
| Capital Research Global Investors | 3.8% | $86,863,410 | 3,001,500 | Capital Research Global Investors | 31 Dec 2024 | |||
| Clearbridge Investments, LLC | 3% | $62,185,375 | 2,148,769 | Clearbridge Investments, LLC | 30 Sep 2024 |
As of 31 Mar 2026, 260 institutional investors reported holding 154,261,468 shares of Klaviyo, Inc. - Common Stock (KVYO). This represents 105% of the company’s total 146,298,238 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
78%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| SUMMIT PARTNERS L P | 13% | 18,852,778 | 0% | 55% | $366,875,060 |
| Capital International Investors | 8% | 11,703,859 | -8.5% | 0.05% | $227,757,096 |
| FMR LLC | 6.7% | 9,787,082 | +17% | 0.01% | $190,456,620 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.1% | 7,531,915 | 0% | 0.01% | $146,571,066 |
| Whale Rock Capital Management LLC | 4.7% | 6,825,206 | +123% | 1.7% | $132,818,509 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.2% | 6,162,720 | 0% | 0% | $119,926,531 |
| WELLINGTON MANAGEMENT GROUP LLP | 3.7% | 5,479,443 | 0.02% | $106,629,960 | |
| MORGAN STANLEY | 3.5% | 5,067,690 | -65% | 0.01% | $98,617,249 |
| BlackRock, Inc. | 3% | 4,354,335 | +17% | 0% | $84,735,360 |
| JPMORGAN CHASE & CO | 2.9% | 4,299,977 | +21% | 0.01% | $81,570,586 |
| Sands Capital Alternatives, LLC | 2.5% | 3,649,678 | 0% | 17% | $71,022,734 |
| FULLER & THALER ASSET MANAGEMENT, INC. | 2% | 2,941,998 | +3.1% | 0.19% | $57,251,272 |
| AMERICAN CENTURY COMPANIES INC | 2% | 2,923,295 | +0.97% | 0.03% | $56,887,356 |
| TWO SIGMA INVESTMENTS, LP | 2% | 2,891,890 | +30% | 0.05% | $56,276,179 |
| FEDERATED HERMES, INC. | 1.8% | 2,639,485 | -9% | 0.08% | $51,364,378 |
| Fiera Capital Corp | 1.6% | 2,399,260 | +2.9% | 0.16% | $46,689,600 |
| MILLENNIUM MANAGEMENT LLC | 1.6% | 2,348,235 | +38% | 0.03% | $45,696,653 |
| Greenoaks Capital Partners LLC | 1.6% | 2,316,796 | 0% | 2% | $45,084,850 |
| GOLDMAN SACHS GROUP INC | 1.5% | 2,161,293 | +42% | 0.01% | $42,058,762 |
| Capital World Investors | 1.4% | 2,040,048 | +78% | 0.01% | $39,699,334 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.2% | 1,773,550 | +6% | 0% | $34,526,913 |
| BANK OF AMERICA CORP /DE/ | 1.2% | 1,686,770 | +89% | 0% | $32,824,545 |
| Point72 Asset Management, L.P. | 1.1% | 1,672,359 | +91% | 0.06% | $32,544,106 |
| RENAISSANCE TECHNOLOGIES LLC | 1.1% | 1,640,844 | -7% | 0.05% | $31,930,824 |
| Bank of New York Mellon Corp | 1% | 1,508,137 | +8.9% | 0.01% | $29,348,347 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
11
Latest
Q1 2026
Rows shown
1-11 of 11
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 154,261,468 | $2,999,812,271 | -$129,865,991 | $19.46 | 260 |
| 2025 Q4 | 158,333,916 | $5,141,097,417 | +$589,644,045 | $32.47 | 260 |
| 2025 Q3 | 141,302,121 | $3,914,230,873 | +$188,134,076 | $27.69 | 274 |
| 2025 Q2 | 133,427,489 | $4,480,157,634 | +$606,486,905 | $33.58 | 254 |
| 2025 Q1 | 115,163,123 | $3,485,157,277 | +$7,777,195 | $30.26 | 215 |
| 2024 Q4 | 114,019,355 | $4,702,454,232 | +$12,413,940 | $41.24 | 183 |
| 2024 Q3 | 112,688,295 | $3,988,569,710 | +$103,363,332 | $35.38 | 155 |
| 2024 Q2 | 110,710,486 | $2,755,035,251 | +$336,409,759 | $24.89 | 131 |
| 2024 Q1 | 97,210,463 | $2,473,738,867 | +$567,238,465 | $25.48 | 129 |
| 2023 Q4 | 74,639,384 | $2,071,573,932 | -$48,805,363 | $27.78 | 102 |
| 2023 Q3 | 76,070,874 | $2,621,101,608 | +$2,620,714,239 | $34.50 | 97 |