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 ($7.3m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $27.70. Options: 18 managers hold calls ($62.2m notional), 14 hold puts ($36.0m).
Trends to Q3 2025
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 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2023 | 73 | 50 |
| Q1 2024 | 105 | 41 |
| Q2 2024 | 73 | 62 |
| Q3 2024 | 87 | 69 |
| Q4 2024 | 110 | 73 |
| Q1 2025 | 150 | 81 |
| Q2 2025 | 177 | 89 |
| Q3 2025 | 166 | 118 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2024 | $89.6m | $44.5m | 0.50 |
| Q1 2025 | $74.5m | $50.5m | 0.68 |
| Q2 2025 | $91.8m | $42.3m | 0.46 |
| Q3 2025 | $62.2m | $36.0m | 0.58 |
Biggest buyers
| FMR LLC | Added | +6.7m |
| MORGAN STANLEY | Added | +6.2m |
| Point72 Asset Management, L.P. | New | +5.2m |
| CITADEL ADVISORS LLC | Added | +2.4m |
| JPMORGAN CHASE & CO | Added | +2.1m |
| VANGUARD GROUP INC | Added | +2.1m |
| Schonfeld Strategic Advisors LLC | Added | +867.1k |
| TWO SIGMA INVESTMENTS, LP | Added | +561.3k |
| 12 West Capital Management LP | Added | +525.0k |
| RENAISSANCE TECHNOLOGIES LLC | Added | +488.3k |
Biggest sellers
| SUMMIT PARTNERS L P | Reduced | -12.0m |
| Focus Partners Wealth | Reduced | -794.4k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | -762.9k |
| Zimmer Partners, LP | Sold out | -719.6k |
| LORD, ABBETT & CO. LLC | Reduced | -695.0k |
| COOPER CREEK PARTNERS MANAGEMENT LLC | Reduced | -687.8k |
| ROYAL BANK OF CANADA | Reduced | -664.8k |
| RAYMOND JAMES FINANCIAL INC | Reduced | -637.4k |
| Whale Rock Capital Management LLC | Reduced | -627.5k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -566.5k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $17.2m621.8k shares |
| JANE STREET GROUP, LLC | Reduced | $10.0m359.5k shares |
| Twin Tree Management, LP | Reduced | $7.5m271.1k shares |
| CITADEL ADVISORS LLC | Added | $7.2m259.3k shares |
| Caption Management, LLC | New | $6.6m240.0k shares |
| SIMPLEX TRADING, LLC | Added | $3.6m131.8k shares |
| TORONTO DOMINION BANK | New | $2.7m95.9k shares |
| IMC-Chicago, LLC | Reduced | $1.8m65.2k shares |
| WOLVERINE TRADING, LLC | New | $1.6m51.7k shares |
| GROUP ONE TRADING LLC | Reduced | $1.2m43.3k shares |
Biggest puts
| Twin Tree Management, LP | Added | $6.8m245.8k shares |
| Walleye Trading LLC | Reduced | $4.4m158.7k shares |
| CITADEL ADVISORS LLC | Reduced | $4.3m154.9k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $4.0m143.9k shares |
| PEAK6 LLC | Added | $3.4m122.8k shares |
| Caption Management, LLC | Added | $2.8m100.0k shares |
| JANE STREET GROUP, LLC | Added | $2.6m95.5k shares |
| SIMPLEX TRADING, LLC | Reduced | $2.0m73.5k shares |
| GOLDMAN SACHS GROUP INC | New | $1.4m50.0k shares |
| GROUP ONE TRADING LLC | Added | $1.4m49.9k 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 Q3 2025
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 |
|---|---|---|---|---|---|
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 0 | — | 1 | $865.7k | — |
| 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 |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2025-09-30 | Bialecki Andrew Chief Executive Officer, director | Sold plan | $4.0m137.2k shares |
| 2025-09-23 | Bialecki Andrew Chief Executive Officer, director | Sold plan | $7.5m211.4k shares |
| 2025-09-16 | Bialecki Andrew Chief Executive Officer, director | Sold plan | $7.3m226.4k shares |
| 2025-09-15 | Hallen Ed Director · By Hodgkins LLC | Sold plan | $2.1m67.5k shares |
| 2025-09-15 | Hallen Ed Director · By Hodgkins Trust | Sold plan | $703.4k22.2k shares |
| 2025-09-15 | Rowland Stephen Eric President | Sold plan | $226.5k7.1k shares |
| 2025-09-12 | Whalen Amanda Chief Financial Officer | Sold plan | $472.5k15.0k shares |
| 2025-09-10 | St. Ledger Susan Director | Sold plan | $109.9k3.4k shares |
| 2025-09-09 | Bialecki Andrew Chief Executive Officer, director | Sold plan | $7.0m220.5k shares |
| 2025-09-08 | SUMMIT PARTNERS L P +5 10% owner · See footnotes | Sold | $127.5m4.0m shares |
| 2025-09-02 | Bialecki Andrew Chief Executive Officer, director | Sold plan | $6.9m223.3k shares |
| 2025-08-26 | Bialecki Andrew Chief Executive Officer, director | Sold plan | $7.1m226.7k shares |
| 2025-08-25 | SUMMIT PARTNERS L P +5 10% owner · See footnote | Sold | $29.3m975.0k shares |
| 2025-08-18 | Galvin Carmel Chief People Officer | Sold plan | $353.3k11.2k shares |
| 2025-08-18 | Edmond Landon Chief Legal Officer | Sold plan | $313.5k10.0k shares |
| 2025-08-18 | Rowland Stephen Eric President | Sold plan | $223.5k7.1k shares |
| 2025-08-15 | Whalen Amanda Chief Financial Officer | Sold plan | $469.8k15.0k shares |
| 2025-08-13 | SUMMIT PARTNERS L P +5 10% owner · See footnotes | Sold | $195.1m6.5m shares |
| 2025-07-15 | Rowland Stephen Eric President | Sold plan | $223.4k7.1k shares |
| 2025-07-11 | Whalen Amanda Chief Financial Officer | Sold plan | $474.8k15.0k 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, Q3 2025
| Manager | Shares | Change |
|---|---|---|
| SUMMIT PARTNERS L P 56.48% of their portfolio | 18.9m $522.0m | Reduced -12.0m |
| VANGUARD GROUP INC 0.01% of their portfolio | 12.8m $354.1m | Added +2.1m |
| MORGAN STANLEY 0.02% of their portfolio | 10.7m $296.1m | Added +6.2m |
| FMR LLC 0.01% of their portfolio | 8.2m $228.2m | Added +6.7m |
| Point72 Asset Management, L.P. 0.32% of their portfolio | 5.2m $145.0m | New |
| ALLIANCEBERNSTEIN L.P. 0.04% of their portfolio | 4.8m $133.1m | Added +382.4k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 3.8m $105.7m | Added +2.1m |
| BlackRock, Inc. 0.00% of their portfolio | 3.7m $101.3m | Added +240.0k |
| Sands Capital Alternatives, LLC 21.33% of their portfolio | 3.5m $97.3m | Unchanged |
| Whale Rock Capital Management LLC 1.00% of their portfolio | 3.1m $84.6m | Reduced -627.5k |
| CITADEL ADVISORS LLC 0.07% of their portfolio | 3.0m $82.9m | Added +2.4m |
| FEDERATED HERMES, INC. 0.14% of their portfolio | 2.9m $80.6m | Reduced -815 |
| Capital Research Global Investors 0.01% of their portfolio | 2.6m $71.8m | Reduced -125.7k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 2.5m $69.8m | Added +462.4k |
| GREENOAKS LLC 2.09% of their portfolio | 2.3m $64.2m | Reduced -28.8k |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 2.1m $58.7m | Reduced -566.5k |
| Clearbridge Investments, LLC 0.04% of their portfolio | 2.0m $54.9m | Reduced -45.2k |
| FRANKLIN RESOURCES INC 0.01% of their portfolio | 1.9m $53.2m | Reduced -27.4k |
| 12 West Capital Management LP 5.28% of their portfolio | 1.8m $50.9m | Added +525.0k |
| MILLENNIUM MANAGEMENT LLC 0.04% of their portfolio | 1.8m $49.3m | Reduced -61.0k |
| TWO SIGMA INVESTMENTS, LP 0.07% of their portfolio | 1.7m $46.9m | Added +561.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.06% of their portfolio | 1.7m $46.6m | Added +488.3k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 1.6m $44.1m | Reduced -154.6k |
| TWO SIGMA ADVISERS, LP 0.09% of their portfolio | 1.6m $43.1m | Added +135.6k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.5m $40.9m | Added +221.6k |
| JANUS HENDERSON GROUP PLC 0.02% of their portfolio | 1.5m $40.3m | Reduced -10.1k |
| VOYA INVESTMENT MANAGEMENT LLC 0.04% of their portfolio | 1.4m $39.3m | Reduced -5.3k |
| Fiera Capital Corp 0.11% of their portfolio | 1.2m $34.4m | Reduced -28.0k |
| Freestone Grove Partners LP 0.23% of their portfolio | 1.1m $30.8m | Added +275.0k |
| SANDS CAPITAL MANAGEMENT, LLC 0.08% of their portfolio | 1.1m $30.6m | Reduced -3.5k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.05% of their portfolio | 1.1m $29.1m | Added +222.6k |
| COOPER CREEK PARTNERS MANAGEMENT LLC 1.05% of their portfolio | 1.0m $28.0m | Reduced -687.8k |
| FIRST TRUST ADVISORS LP 0.02% of their portfolio | 926.3k $25.6m | Reduced -62.4k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 921.6k $25.5m | Reduced -664.8k |
| Schonfeld Strategic Advisors LLC 0.18% of their portfolio | 913.3k $25.3m | Added +867.1k |
| ArrowMark Colorado Holdings LLC 0.46% of their portfolio | 900.5k $24.9m | Added +289.5k |
| STATE STREET CORP 0.00% of their portfolio | 817.2k $22.6m | Added +103.4k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 729.9k $20.2m | Added +120.9k |
| AXA Investment Managers S.A. 0.05% of their portfolio | 652.0k $18.1m | First filing |
| Qube Research & Technologies Ltd 0.03% of their portfolio | 641.4k $17.8m | Added +70.8k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 623.7k $17.3m | Reduced -762.9k |
| Integrated Wealth Concepts LLC 0.15% of their portfolio | 598.2k $16.6m | Reduced -232.3k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 589.7k $16.3m | Reduced -285.3k |
| Balyasny Asset Management L.P. 0.03% of their portfolio | 576.6k $16.0m | Added +459.7k |
| D. E. Shaw & Co., Inc. 0.01% of their portfolio | 528.6k $14.6m | Reduced -522.6k |
| MARSHALL WACE, LLP 0.02% of their portfolio | 515.4k $14.3m | Reduced -164.3k |
| Delta Global Management LP 1.04% of their portfolio | 514.4k $14.2m | Reduced -39.0k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 509.7k $14.1m | Added +1.2k |
| Quantinno Capital Management LP 0.04% of their portfolio | 501.1k $13.9m | Reduced -89 |
| Morangie Management LLC 11.22% of their portfolio | 469.8k $13.0m | Reduced -13.1k |
| LORD, ABBETT & CO. LLC 0.04% of their portfolio | 469.7k $13.0m | Reduced -695.0k |
| GLYNN CAPITAL MANAGEMENT LLC 4.00% of their portfolio | 457.3k $12.7m | Reduced -248.0k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.01% of their portfolio | 455.5k $12.6m | Added +425.0k |
| Trexquant Investment LP 0.13% of their portfolio | 454.4k $12.6m | Added +91.6k |
| VICTORY CAPITAL MANAGEMENT INC 0.01% of their portfolio | 433.9k $12.0m | Added +64.1k |
| UBS Group AG 0.00% of their portfolio | 419.3k $11.6m | Reduced -105.8k |
| J. Goldman & Co LP 0.43% of their portfolio | 413.0k $11.4m | New |
| TWIN FOCUS CAPITAL PARTNERS, LLC 1.45% of their portfolio | 412.8k $11.4m | Reduced -14.3k |
| Engineers Gate Manager LP 0.13% of their portfolio | 403.0k $11.2m | Added +170.9k |
| Barton Investment Management 1.11% of their portfolio | 395.0k $10.9m | New |
| WCM INVESTMENT MANAGEMENT, LLC 0.03% of their portfolio | 389.3k $12.3m | Reduced -229.9k |
| Susquehanna Portfolio Strategies, LLC 0.17% of their portfolio | 389.1k $10.8m | Added +261.7k |
| GOODNOW INVESTMENT GROUP, LLC 1.02% of their portfolio | 384.4k $10.6m | Added +222.9k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 349.1k $9.7m | Added +26.8k |
| Granahan Investment Management, LLC 0.35% of their portfolio | 310.9k $8.6m | Reduced -168.9k |
| NEEDHAM INVESTMENT MANAGEMENT LLC 0.59% of their portfolio | 305.0k $8.4m | Unchanged |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 303.4k $8.4m | Reduced -528.4k |
| Burkehill Global Management, LP 0.47% of their portfolio | 300.0k $8.3m | Unchanged |
| ALGERT GLOBAL LLC 0.13% of their portfolio | 289.5k $8.0m | Added +184.4k |
| Cinctive Capital Management LP 0.39% of their portfolio | 285.5k $7.9m | New |
| Cynosure Group, LLC 0.43% of their portfolio | 283.8k $7.9m | Added +141.9k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 283.6k $7.9m | Added +35.1k |
| Bienville Capital Management, LLC 1.47% of their portfolio | 279.3k $7.7m | New |
| SummitTX Capital, L.P. 0.30% of their portfolio | 264.2k $7.3m | Added +177.0k |
| Cubist Systematic Strategies, LLC 0.10% of their portfolio | 252.3k $7.0m | Reduced -353.6k |
| SCOPIA CAPITAL MANAGEMENT LP 0.96% of their portfolio | 247.6k $6.9m | New |
| BLAIR WILLIAM & CO/IL 0.02% of their portfolio | 238.8k $6.6m | Reduced -6.5k |
| Jump Financial, LLC 0.08% of their portfolio | 235.9k $6.5m | Reduced -132.6k |
| Mayflower Financial Advisors, LLC 0.81% of their portfolio | 233.2k $6.5m | Unchanged |
| CAPITAL FUND MANAGEMENT S.A. 0.06% of their portfolio | 226.6k $6.3m | Added +60.1k |
| Ararat Capital Management LP 3.28% of their portfolio | 221.1k $6.1m | Reduced -61.7k |
| Quantbot Technologies LP 0.16% of their portfolio | 206.2k $5.7m | Reduced -52.9k |
| NEXT CENTURY GROWTH INVESTORS LLC 0.40% of their portfolio | 199.4k $5.5m | New |
| Swiss National Bank 0.00% of their portfolio | 198.7k $5.5m | Added +17.1k |
| IEQ CAPITAL, LLC 0.02% of their portfolio | 187.3k $5.2m | Added +81.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 182.6k $5.1m | Reduced -99.9k |
| Pathstone Holdings, LLC 0.02% of their portfolio | 173.9k $4.8m | Added +858 |
| Night Squared LP 1.67% of their portfolio | 167.3k $4.6m | Added +23.5k |
| Longaeva Partners L.P. 0.90% of their portfolio | 153.2k $4.2m | Reduced -148.3k |
| Verition Fund Management LLC 0.02% of their portfolio | 152.2k $4.2m | Reduced -15.6k |
| SEVEN GRAND MANAGERS, LLC 0.34% of their portfolio | 150.0k $4.2m | New |
| Paloma Partners Management Co 0.77% of their portfolio | 140.2k $3.9m | New |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 134.8k $3.7m | Reduced -105.8k |
| Focus Partners Wealth 0.01% of their portfolio | 134.2k $3.7m | Reduced -794.4k |
| OSSIAM 0.05% of their portfolio | 133.9k $3.7m | New |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 128.9k $3.6m | Reduced -9.1k |
| Crestwood Advisors Group, LLC 0.06% of their portfolio | 128.9k $3.6m | Added +16 |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 116.7k $3.2m | Added +32.7k |
| Renaissance Capital LLC 1.63% of their portfolio | 105.0k $2.9m | Added +14.9k |
| Nicholas Investment Partners, LP 0.22% of their portfolio | 103.6k $2.9m | Added +1.7k |