KLAVIYO INC KVYO
COM SER A · Common Stock · CUSIP 49845K101
B2C CRM and marketing automation platform
- SectorTechnology
- IndustryServices-Prepackaged Software
- HeadquartersBoston, MA
- Founded2012
- Websiteklaviyo.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($10.4k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $19.70. Options: 13 managers hold calls ($27.8m notional), 12 hold puts ($15.6m).
Trends to Q1 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2023 | 98 |
| Q4 2023 | 103 |
| Q1 2024 | 133 |
| Q2 2024 | 133 |
| Q3 2024 | 157 |
| Q4 2024 | 185 |
| Q1 2025 | 220 |
| Q2 2025 | 256 |
| Q3 2025 | 277 |
| Q4 2025 | 262 |
| Q1 2026 | 267 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2024 | 73 | 62 |
| Q3 2024 | 87 | 69 |
| Q4 2024 | 110 | 73 |
| Q1 2025 | 150 | 81 |
| Q2 2025 | 177 | 89 |
| Q3 2025 | 166 | 118 |
| Q4 2025 | 144 | 150 |
| Q1 2026 | 169 | 106 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $91.8m | $42.3m | 0.46 |
| Q3 2025 | $62.2m | $36.0m | 0.58 |
| Q4 2025 | $52.8m | $30.5m | 0.58 |
| Q1 2026 | $27.8m | $15.6m | 0.56 |
Biggest buyers
| WELLINGTON MANAGEMENT GROUP LLP | New | +5.5m |
| Whale Rock Capital Management LLC | Added | +3.8m |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | +1.5m |
| FMR LLC | Added | +1.4m |
| MARSHALL WACE, LLP | Added | +1.0m |
| Capital World Investors | Added | +892.1k |
| CITADEL ADVISORS LLC | Added | +846.6k |
| AQR CAPITAL MANAGEMENT LLC | Added | +832.3k |
| Point72 Asset Management, L.P. | Added | +795.5k |
| BANK OF AMERICA CORP /DE/ | Added | +793.6k |
Biggest sellers
| MORGAN STANLEY | Reduced | -9.5m |
| FULLER & THALER ASSET MANAGEMENT, INC. | Reduced | -2.8m |
| 12 West Capital Management LP | Sold out | -1.8m |
| TWO SIGMA ADVISERS, LP | Sold out | -1.8m |
| ALLIANCEBERNSTEIN L.P. | Reduced | -1.7m |
| Ancora Advisors LLC | Reduced | -1.3m |
| Capital Research Global Investors | Reduced | -1.2m |
| Capital International Investors | Reduced | -1.1m |
| FRANKLIN RESOURCES INC | Reduced | -902.3k |
| Shannon River Fund Management LLC | Sold out | -729.7k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $10.9m558.9k shares |
| CITADEL ADVISORS LLC | Reduced | $5.1m259.9k shares |
| GROUP ONE TRADING LLC | Added | $3.5m180.6k shares |
| JANE STREET GROUP, LLC | Added | $3.5m177.6k shares |
| IMC-Chicago, LLC | Added | $2.1m109.8k shares |
| SIMPLEX TRADING, LLC | Reduced | $655.8k33.7k shares |
| D. E. Shaw & Co., Inc. | Unchanged | $599.4k30.8k shares |
| Walleye Capital LLC | Added | $527.4k27.1k shares |
| Squarepoint Ops LLC | New | $330.8k17.0k shares |
| TUDOR INVESTMENT CORP ET AL | Added | $274.4k14.1k shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $3.7m187.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $3.4m176.6k shares |
| JANE STREET GROUP, LLC | Added | $2.9m148.6k shares |
| IMC-Chicago, LLC | Added | $1.7m88.1k shares |
| GROUP ONE TRADING LLC | Reduced | $1.6m83.1k shares |
| Squarepoint Ops LLC | New | $527.4k27.1k shares |
| SIMPLEX TRADING, LLC | Added | $502.1k25.8k shares |
| Walleye Capital LLC | Reduced | $321.1k16.5k shares |
| TUDOR INVESTMENT CORP ET AL | Added | $305.5k15.7k shares |
| Aptus Capital Advisors, LLC | New | $291.9k15.0k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Bialecki Andrew 13G · exempt (held before listing) +1.4 pts · filed 2026-08-05 | 36.5% |
| SHOPIFY INC. 13D · may seek influence +2.0 pts · filed 2026-08-31 | 20.8% |
| Hallen Ed 13G · exempt (held before listing) filed 2025-11-05 | 19.4% |
| SUMMIT PARTNERS L P 13G · exempt (held before listing) -8.8 pts · filed 2025-11-13 | 12.0% |
| Accomplice Fund I, L.P. 13G · exempt (held before listing) filed 2025-05-07 | 10.5% |
| Capital International Investors 13G · institution -1.3 pts · filed 2026-05-14 | 8.0% |
| BlackRock, Inc. 13G · institution new · filed 2026-07-29 | 5.3% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.2% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-07-31 | 5.0% |
Fell to 5% or below in the last year: FMR LLC (4.7%, 2026-08-06), VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC), MORGAN STANLEY (4.1%, 2026-03-06)
Insider purchases and sales in Q1 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2024 | 0 | — | 3 | $1.4m | $1.4m |
| Q3 2024 | 0 | — | 4 | $12.9m | $12.9m |
| Q4 2024 | 0 | — | 3 | $4.9m | $4.9m |
| Q1 2025 | 0 | — | 4 | $5.6m | $5.6m |
| Q2 2025 | 0 | — | 5 | $364.0m | $3.1m |
| Q3 2025 | 0 | — | 7 | $45.6m | $45.6m |
| Q4 2025 | 0 | — | 6 | $50.0m | $50.0m |
| Q1 2026 | 1 | $300.3k | 3 | $40.7m | $40.7m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-03-31 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $3.9m200.0k shares |
| 2026-03-24 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $3.6m200.0k shares |
| 2026-03-17 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $3.9m200.0k shares |
| 2026-03-12 | Edmond Landon Chief Legal Officer | Sold plan | $289.5k14.4k shares |
| 2026-03-12 | Whalen Amanda Chief Financial Officer | Sold plan | $274.2k14.0k shares |
| 2026-03-10 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $4.1m206.8k shares |
| 2026-03-05 | Edmond Landon Chief Legal Officer | Sold plan | $304.3k15.1k shares |
| 2026-03-03 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $3.7m200.0k shares |
| 2026-02-24 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $3.4m200.0k shares |
| 2026-02-13 | Whalen Amanda Chief Financial Officer | Sold plan | $264.3k14.0k shares |
| 2026-02-12 | Ceran Jennifer Director | Bought | $300.3k16.3k shares |
| 2026-01-27 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $3.9m155.2k shares |
| 2026-01-20 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $4.1m167.9k shares |
| 2026-01-15 | Whalen Amanda Chief Financial Officer | Sold plan | $361.7k14.0k shares |
| 2026-01-15 | Edmond Landon Chief Legal Officer | Sold plan | $258.3k10.0k shares |
| 2026-01-13 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $3.9m140.6k shares |
| 2026-01-07 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $499.6k16.6k shares |
| 2026-01-06 | Bialecki Andrew Co-Chief Executive Officer, director | Sold plan | $4.0m137.5k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| SUMMIT PARTNERS L P 54.74% of their portfolio | 18.9m $366.9m | Unchanged |
| Capital International Investors 0.05% of their portfolio | 11.7m $227.8m | Reduced -1.1m |
| FMR LLC 0.01% of their portfolio | 9.8m $190.5m | Added +1.4m |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 7.5m $146.6m | First filing |
| Whale Rock Capital Management LLC 1.72% of their portfolio | 6.8m $132.8m | Added +3.8m |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 6.2m $119.9m | First filing |
| WELLINGTON MANAGEMENT GROUP LLP 0.02% of their portfolio | 5.5m $106.6m | New |
| MORGAN STANLEY 0.01% of their portfolio | 5.1m $98.6m | Reduced -9.5m |
| BlackRock, Inc. 0.00% of their portfolio | 4.4m $84.7m | Added +638.0k |
| JPMORGAN CHASE & CO 0.01% of their portfolio | 4.3m $81.6m | Added +735.2k |
| Sands Capital Alternatives, LLC 16.86% of their portfolio | 3.6m $71.0m | Unchanged |
| ALLIANCEBERNSTEIN L.P. 0.03% of their portfolio | 3.0m $99.0m | Reduced -1.7m |
| FULLER & THALER ASSET MANAGEMENT, INC. 0.19% of their portfolio | 2.9m $57.3m | Reduced -2.8m |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 2.9m $56.9m | Added +28.0k |
| TWO SIGMA INVESTMENTS, LP 0.05% of their portfolio | 2.9m $56.3m | Added +667.9k |
| FEDERATED HERMES, INC. 0.08% of their portfolio | 2.6m $51.4m | Reduced -261.3k |
| Fiera Capital Corp 0.16% of their portfolio | 2.4m $46.7m | Added +67.6k |
| MILLENNIUM MANAGEMENT LLC 0.03% of their portfolio | 2.3m $45.7m | Added +647.7k |
| GREENOAKS LLC 1.96% of their portfolio | 2.3m $45.1m | Unchanged |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 2.2m $42.1m | Added +637.2k |
| Capital World Investors 0.01% of their portfolio | 2.0m $39.7m | Added +892.1k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.8m $34.5m | Added +100.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.7m $32.8m | Added +793.6k |
| Point72 Asset Management, L.P. 0.06% of their portfolio | 1.7m $32.5m | Added +795.5k |
| RENAISSANCE TECHNOLOGIES LLC 0.05% of their portfolio | 1.6m $31.9m | Reduced -122.9k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 1.5m $29.3m | Added +123.5k |
| ArrowMark Colorado Holdings LLC 0.77% of their portfolio | 1.5m $29.0m | Added +672.9k |
| Clearbridge Investments, LLC 0.02% of their portfolio | 1.5m $28.7m | Reduced -168.5k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.04% of their portfolio | 1.5m $28.4m | New |
| Capital Research Global Investors 0.00% of their portfolio | 1.3m $26.2m | Reduced -1.2m |
| Schonfeld Strategic Advisors LLC 0.20% of their portfolio | 1.2m $24.1m | Added +536.9k |
| Bienville Capital Management, LLC 4.54% of their portfolio | 1.2m $23.9m | Added +258.6k |
| Islander Capital Partners, L.P. 9.40% of their portfolio | 1.2m $23.9m | Added +604.3k |
| Alyeska Investment Group, L.P. 0.07% of their portfolio | 1.2m $23.5m | Added +656.1k |
| FIRST TRUST ADVISORS LP 0.02% of their portfolio | 1.2m $23.0m | Added +375.0k |
| CITADEL ADVISORS LLC 0.02% of their portfolio | 1.2m $22.6m | Added +846.6k |
| STATE STREET CORP 0.00% of their portfolio | 1.2m $22.5m | Added +104.4k |
| MARSHALL WACE, LLP 0.02% of their portfolio | 1.1m $22.1m | Added +1.0m |
| FRANKLIN RESOURCES INC 0.01% of their portfolio | 1.1m $21.0m | Reduced -902.3k |
| Barton Investment Management 2.56% of their portfolio | 1.1m $20.4m | Added +380.0k |
| JANUS HENDERSON GROUP PLC 0.01% of their portfolio | 1.0m $20.0m | Added +138.4k |
| AQR CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 911.9k $17.7m | Added +832.3k |
| VOYA INVESTMENT MANAGEMENT LLC 0.02% of their portfolio | 908.6k $17.7m | Reduced -349.7k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 884.8k $17.2m | Added +75.4k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 878.2k $17.1m | First filing |
| Delta Global Management LP 1.35% of their portfolio | 847.5k $16.5m | Added +62.2k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.01% of their portfolio | 757.1k $14.7m | Added +166.4k |
| Trexquant Investment LP 0.10% of their portfolio | 700.0k $13.6m | Added +471.5k |
| Qube Research & Technologies Ltd 0.02% of their portfolio | 601.7k $11.7m | New |
| SANDS CAPITAL MANAGEMENT, LLC 0.05% of their portfolio | 595.2k $11.6m | Reduced -333.6k |
| Quantinno Capital Management LP 0.02% of their portfolio | 548.0k $10.7m | Reduced -1.1k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 458.1k $8.9m | Unchanged |
| Integrated Wealth Concepts LLC 0.07% of their portfolio | 429.8k $8.4m | Added +364.2k |
| Morangie Management LLC 7.60% of their portfolio | 424.1k $8.3m | Added +1.0k |
| PICTON MAHONEY ASSET MANAGEMENT 0.08% of their portfolio | 401.1k $7.8m | Added +368.8k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 370.1k $7.2m | Added +21.8k |
| TWIN FOCUS CAPITAL PARTNERS, LLC 0.82% of their portfolio | 364.7k $7.1m | Unchanged |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 322.7k $6.3m | Added +35.9k |
| Burkehill Global Management, LP 0.29% of their portfolio | 300.0k $5.8m | Unchanged |
| GOODNOW INVESTMENT GROUP, LLC 0.62% of their portfolio | 293.1k $5.7m | Reduced -81.5k |
| Lisanti Capital Growth, LLC 1.38% of their portfolio | 281.1k $5.5m | Added +103.0k |
| Swiss National Bank 0.00% of their portfolio | 259.2k $5.0m | Added +6.5k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 245.9k $4.8m | Added +3.4k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 237.4k $4.6m | Added +12.0k |
| Night Squared LP 0.68% of their portfolio | 237.2k $4.6m | Added +101.0k |
| IEQ CAPITAL, LLC 0.02% of their portfolio | 233.3k $4.5m | Added +100.6k |
| Mayflower Financial Advisors, LLC 0.54% of their portfolio | 226.7k $4.4m | Added +29 |
| Connor, Clark & Lunn Investment Management Ltd. 0.01% of their portfolio | 209.0k $4.1m | Added +88.4k |
| Freestone Grove Partners LP 0.03% of their portfolio | 206.7k $4.0m | Reduced -2.5k |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 199.4k $3.9m | Reduced -29.5k |
| UBS Group AG 0.00% of their portfolio | 196.4k $3.8m | Reduced -272.2k |
| 1832 Asset Management L.P. 0.00% of their portfolio | 190.0k $3.7m | Reduced -36.8k |
| CAPITAL FUND MANAGEMENT S.A. 0.03% of their portfolio | 184.9k $3.6m | Reduced -48.0k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.00% of their portfolio | 179.2k $3.5m | New |
| HUNTINGTON NATIONAL BANK 0.02% of their portfolio | 166.5k $3.2m | Unchanged |
| TUDOR INVESTMENT CORP ET AL 0.02% of their portfolio | 162.9k $3.2m | Added +151.5k |
| Pathstone Holdings, LLC 0.01% of their portfolio | 159.5k $3.1m | Unchanged |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.00% of their portfolio | 157.8k $3.1m | Reduced -455.2k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 155.4k $3.0m | Added +41.7k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 153.4k $3.0m | Reduced -29.7k |
| FORMULA GROWTH LTD 1.32% of their portfolio | 150.0k $2.9m | New |
| CITIGROUP INC 0.00% of their portfolio | 143.5k $2.8m | Added +88.4k |
| Cynosure Group, LLC 0.35% of their portfolio | 141.9k $2.8m | Unchanged |
| Focus Partners Wealth 0.00% of their portfolio | 141.1k $2.7m | Added +6.6k |
| ALGERT GLOBAL LLC 0.04% of their portfolio | 139.2k $2.7m | Added +34.8k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 134.9k $2.6m | Added +8.8k |
| OSSIAM 0.05% of their portfolio | 133.9k $2.6m | Unchanged |
| Zweig-DiMenna Associates LLC 0.35% of their portfolio | 129.2k $2.5m | New |
| Crestwood Advisors Group, LLC 0.04% of their portfolio | 128.9k $2.5m | Reduced -10 |
| NEUBERGER BERMAN GROUP LLC 0.00% of their portfolio | 123.5k $2.4m | Reduced -322.0k |
| XTX Topco Ltd 0.04% of their portfolio | 122.9k $2.4m | New |
| Aquatic Capital Management LLC 0.07% of their portfolio | 121.0k $2.4m | Added +91.0k |
| Mariner, LLC 0.00% of their portfolio | 120.1k $2.3m | Added +38.2k |
| BW Gestao de Investimentos Ltda. 0.10% of their portfolio | 118.8k $2.3m | New |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 112.5k $2.2m | Added +2.8k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 108.4k $2.1m | Added +35.6k |
| FIL Ltd 0.00% of their portfolio | 107.4k $2.1m | Reduced -2.6k |
| Cerity Partners LLC 0.00% of their portfolio | 106.6k $2.1m | Added +33.6k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 102.7k $2.0m | Added +8.7k |
| Brevan Howard Capital Management LP 0.02% of their portfolio | 101.6k $2.0m | New |