SUMMIT PARTNERS L P

BOSTON, MA · CIK 830588 · 13F filing filed 2025-02-04

SEC-registered investment adviser since 2005 · limited partnership

Assets managed$42.0bn
Staff218 · 118 in investment roles
Main clients (by assets)Private funds 100%
Private funds87 · $42.0bn gross assets
Websitesummitpartners.com
Form ADV · 2026-08-20SEC adviser record

Legal entitySUMMIT PARTNERS, L.P. (US)

$2.2bn reported value -0.3% vs Q3 2024

8positions

100.0%in top 10

0 new 0 added 2 reduced 1 sold out vs Q3 2024

Holdings, Q4 2024

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#	Security	Ticker	Shares	Value	% of portfolio	Change	Shares change
1	KLAVIYO INC COM SER A KVYO	KVYO	40,827,778	$1.7bn75.40%	75.40%	Reduced -5.6m	-5,600,000 -12.1%
2	LIFESTANCE HEALTH GROUP INC COM LFST	LFST	41,932,358	$309.0m13.84%	13.84%	Unchanged
3	A K A BRANDS HLDG CORP COM SHS AKA	AKA	6,053,693	$113.3m5.08%	5.08%	Unchanged
4	JAMF HLDG CORP COM JAMF	JAMF	4,475,381	$62.9m2.82%	2.82%	Unchanged
5	SOLO BRANDS INC COM CL A COM CL A		44,034,960	$50.2m2.25%	2.25%	Unchanged
6	MACOM TECH SOLUTIONS HLDGS I COM MTSI	MTSI	45,512	$5.9m0.26%	0.26%	Unchanged
7	MARKFORGED HOLDING CORPORATI COM NEW COM NEW		1,473,154	$4.6m0.21%	0.21%	Unchanged
8	A10 NETWORKS INC COM ATEN	ATEN	174,464	$3.2m0.14%	0.14%	Reduced -431.8k	-431,799 -71.2%

Sold out since Q3 2024

Security	Ticker	Shares held before	Value then
8X8 INC NEW EGHT	EGHT	52,919	$108.0k52.9k shares

Stakes above 5%

Companies where this manager has reported owning more than 5% of a class of shares, on Schedule 13D (may seek influence) or 13G (passive): its latest filing for each, from 19 Dec 2024 on.

Company	Ticker	Stake	Change	Schedule	Last filed
KLAVIYO INC KVYO · 13G · filed 2025-11-13	KVYO	12.0%≈ $284.7m	-8.8 pts	13G	2025-11-13
LIFESTANCE HEALTH GROUP INC LFST · 13G · filed 2026-08-11	LFST	6.1%≈ $249.7m	-1.4 pts	13G	2026-08-11

Trades reported as a company insider in Q4 2024

Owning 10% or more of a company, or having someone on its board, makes this manager an insider there: it reports its trades in that company's shares on Form 4 within two business days. Open-market and private purchases and sales only.

Date	Company	Ticker	Trade	Shares	Value	Their holding
2024-12-09	KLAVIYO INC 10% owner · See footnotes	KVYO	Sold	2,100,000	$82.2m2.1m shares	-100%
2024-11-14	KLAVIYO INC 10% owner · See footnotes	KVYO	Sold	3,153,293	$114.1m3.2m shares	-90%