Klaviyo, Inc. Series A

Historical 13F Holders

Symbol: KVYO
CUSIP: 49845K101
All holders as of: Q2 2026
Type: Equity
Class: COM SER A

Reported Value, Excluding Options

Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 49845K101 since 12/18/2024, newest first.

Filer	% of Class	Shares	Form	Filed
Shopify Inc. 13D/A Amendment 4	20.8%	33,405,047	13D/A Amendment 4	8/31/2026 Event 8/5/2026
Shopify Strategic Holdings 3 LLC	20.8%	33,405,047
Shopify Inc.	20.8%	33,405,047
FMR LLC 13G/A Amendment 1	4.7%	6,566,154.63	13G/A Amendment 1	8/6/2026 Event 6/30/2026
FMR LLC	4.7%	6,566,154.63
Abigail P. Johnson	4.7%	6,566,154.63
Bialecki Andrew 13G/A Amendment 4	36.5%	75,326,229	13G/A Amendment 4	8/5/2026 Event 6/30/2026
Vanguard Capital Management LLC 13G	5.0%	7,051,508	13G	7/31/2026 Event 6/30/2026
BlackRock, Inc. 13G	5.3%	7,462,388	13G	7/29/2026 Event 6/30/2026
Capital International Investors 13G/A Amendment 1	8.0%	11,703,859	13G/A Amendment 1	5/14/2026 Event 3/31/2026
Vanguard Portfolio Management LLC 13G	5.2%	7,531,915	13G	4/29/2026 Event 3/31/2026
Vanguard Group Inc 13G/A Amendment 4	0%	0	13G/A Amendment 4	3/27/2026 Event 3/13/2026
Morgan Stanley 13G/A Amendment 2	4.1%	5,988,235	13G/A Amendment 2	3/6/2026 Event 2/28/2026
Capital International Investors 13G	9.3%	12,788,846	13G	2/13/2026 Event 12/31/2025
Bialecki Andrew 13G/A Amendment 3	35.1%	78,163,529	13G/A Amendment 3	2/10/2026 Event 12/31/2025
Morgan Stanley 13G/A Amendment 1	10.5%	14,538,026	13G/A Amendment 1	1/8/2026 Event 12/31/2025
Shopify Inc. 13D/A Amendment 3	18.9%	32,027,518	13D/A Amendment 3	11/14/2025 Event 8/29/2025
Shopify Strategic Holdings 3 LLC	18.9%	32,027,518
Shopify Inc.	18.9%	32,027,518
Summit Partners, L.P. 13G/A Amendment 5	12.0%	18,852,778	13G/A Amendment 5	11/13/2025 Event 9/30/2025
Summit Partners Growth Equity Fund IX-A, L.P.	7.1%	11,142,414
Summit Partners Growth Equity Fund IX-B, L.P.	4.4%	6,957,168
Summit Partners Co-Invest (Kiwi), L.P.	0.4%	687,035
Summit Investors GE IX/VC IV, LLC	<0.1%	58,561
Summit Investors GE IX/VC IV (UK), L.P.	<0.1%	7,600
Summit Partners, L.P.	12.0%	18,852,778
Morgan Stanley 13G	8.4%	10,321,920	13G	11/7/2025 Event 9/30/2025
Hallen Ed 13G/A Amendment 1	19.4%	32,879,098	13G/A Amendment 1	11/5/2025 Event 9/30/2025
Bialecki Andrew 13G/A Amendment 2	37.7%	83,050,885	13G/A Amendment 2	11/5/2025 Event 9/30/2025
FMR LLC 13G	6.7%	8,240,030.67	13G	11/5/2025 Event 9/30/2025
FMR LLC	6.7%	8,240,030.67
Abigail P. Johnson	6.7%	8,240,030.67
Summit Partners, L.P. 13G/A Amendment 4	20.9%	30,827,778	13G/A Amendment 4	8/8/2025 Event 6/30/2025
Summit Partners Growth Equity Fund IX-A, L.P.	12.3%	18,219,907
Summit Partners Growth Equity Fund IX-B, L.P.	7.7%	11,376,255
Summit Partners Co-Invest (Kiwi), L.P.	0.8%	1,123,429
Summit Investors GE IX/VC IV, LLC	0.1%	95,759
Summit Investors GE IX/VC IV (UK), L.P.	<0.1%	12,428
Summit Partners, L.P.	20.9%	30,827,778
Bialecki Andrew 13G/A Amendment 1	42.9%	87,796,336	13G/A Amendment 1	8/5/2025 Event 6/30/2025
Vanguard Group Inc 13G/A Amendment 3	10.2%	10,728,178	13G/A Amendment 3	7/7/2025 Event 6/30/2025
Sands Capital Ventures, LLC 13G/A Amendment 2	4.9%	4,416,264	13G/A Amendment 2	5/14/2025 Event 3/31/2025
Sands Capital Ventures, LLC	3.8%	3,437,793
Sands Capital Global Innovation Fund II, L.P.	2.5%	2,292,545
Sands Capital Global Innovation Fund II-KLV, L.P.	0.8%	748,919
Sands Capital Global Innovation Fund-Public Opportunities, L.P.	0%	5,722
Sands Capital Management, LLC	1.1%	972,749
Sands Frank M.	4.9%	4,416,264
AllianceBernstein L.P. 13G/A Amendment 3	4.4%	4,019,280	13G/A Amendment 3	5/14/2025 Event 3/31/2025
Accel Growth Fund V L.P. 13G/A Amendment 3	4.9%	4,658,363	13G/A Amendment 3	5/13/2025 Event 3/31/2025
Accel Growth Fund V L.P. ("AGF5")	1.2%	1,055,195
Accel Growth Fund V Strategic Partners L.P. ("AGF5SP")	0%	44,808
Accel Growth Fund V Associates L.L.C. ("AGF5A")	1.2%	1,100,003
Accel Growth Fund V Investors (2019) L.L.C. ("AGFI19")	0.1%	54,855
Accel Leaders Fund II L.P. ("ALF2")	3.4%	3,163,506
Accel Leaders Fund II Strategic Partners L.P. ("ALF2SP")	0.1%	134,772
Accel Leaders Fund II Associates L.L.C. ("ALF2A")	3.6%	3,298,278
Accel Leaders Fund II Investors (2019) L.L.C. ("ALFI19")	0.2%	166,299
Ping Li ("PL")	4.9%	4,658,363
Accomplice Fund I, L.P. 13G/A Amendment 1	10.5%	11,137,154	13G/A Amendment 1	5/7/2025 Event 3/31/2025
Accomplice Fund I, L.P.	10.5%	11,114,110
Accomplice Associates I, LLC	10.5%	11,114,110
Jeff Fagnan	10.5%	11,137,154
Summit Partners, L.P. 13G/A Amendment 3	30.0%	38,827,778	13G/A Amendment 3	5/7/2025 Event 3/31/2025
Summit Partners Growth Equity Fund IX-A, L.P.	17.7%	22,948,085
Summit Partners Growth Equity Fund IX-B, L.P.	11.1%	14,328,463
Summit Partners Co-Invest (Kiwi), L.P.	1.1%	1,414,967
Summit Investors GE IX/VC IV, LLC	0.1%	120,609
Summit Investors GE IX/VC IV (UK), L.P.	<0.1%	15,654
Summit Partners, L.P.	30.0%	38,827,778
Shopify Inc. 13D/A Amendment 2	25.5%	30,994,372	13D/A Amendment 2	2/21/2025 Event 11/9/2024
Shopify Strategic Holdings 3 LLC	25.5%	30,994,372
Shopify Inc.	25.5%	30,994,372
Accel Growth Fund V L.P. 13G/A Amendment 2	5.6%	4,619,435	13G/A Amendment 2	2/14/2025 Event 12/31/2024
Accel Growth Fund V L.P.	1.3%	1,055,195
Accel Growth Fund V Strategic Partners L.P.	0.1%	44,808
Accel Growth Fund V Associates L.L.C.	1.4%	1,100,003
Accel Growth Fund V Investors (2019) L.L.C.	0.1%	54,855
Accel Leaders Fund II L.P.	3.9%	3,163,506
Accel Leaders Fund II Strategic Partners L.P.	0.2%	134,772
Accel Leaders Fund II Associates L.L.C.	4.0%	3,298,278
Accel Leaders Fund II Investors (2019) L.L.C.	0.2%	166,299
Li Ping	5.6%	4,619,435
Capital Research Global Investors 13G/A Amendment 1	3.8%	3,001,500	13G/A Amendment 1	2/13/2025 Event 12/31/2024
Summit Partners, L.P. 13G/A Amendment 2	34.1%	40,827,778	13G/A Amendment 2	2/7/2025 Event 12/31/2024
Summit Partners Growth Equity Fund IX-A, L.P.	20.2%	24,130,130
Summit Partners Growth Equity Fund IX-B, L.P.	12.6%	15,066,515
Summit Partners Co-Invest (Kiwi), L.P.	1.2%	1,487,851
Summit Investors GE IX/VC IV, LLC	0.1%	126,822
Summit Investors GE IX/VC IV (UK), L.P.	<0.1%	16,460
Summit Partners, L.P.	34.1%	40,827,778
AllianceBernstein L.P. 13G/A Amendment 2	5.1%	3,996,216	13G/A Amendment 2	2/5/2025 Event 12/31/2024
AllianceBernstein L.P. 13G/A Amendment 1	6.5%	4,682,386	13G/A Amendment 1	11/15/2024 Event 9/30/2024
Clearbridge Investments, LLC 13G/A Amendment 1	3.0%	2,148,769	13G/A Amendment 1	10/31/2024 Event 9/30/2024

13F Holders by Quarter

Period	Filings	Shares, Excl. Options	Value, Excl. Options	Options Value
2026 Q3	7	778 k	$12.2 M	$0
2026 Q2	302	148 M	$2.35 B	$59.3 M
2026 Q1	287	157 M	$3.10 B	$33.2 M
2025 Q4	283	161 M	$5.23 B	$71.0 M
2025 Q3	310	143 M	$3.97 B	$87.4 M
2025 Q2	284	135 M	$4.54 B	$119 M
2025 Q1	245	118 M	$3.58 B	$108 M
2024 Q4	209	115 M	$4.74 B	$121 M
2024 Q3	174	113 M	$4.01 B	$73.2 M
2024 Q2	149	115 M	$2.85 B	$21.9 M
2024 Q1	150	100 M	$2.55 B	$23.5 M
2023 Q4	115	78.4 M	$2.18 B	$15.1 M
2023 Q3	106	76.2 M	$2.63 B	$2.03 M