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Super Investors SUMMIT PARTNERS L P
SP

SUMMIT PARTNERS L P

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$609M
Positions
5
Quarter ended
June 30, 2026
Filed
July 30, 2026

Reported portfolio value by quarter (54 quarters reported)

$3.13B $2.3M
Q4 12 Q4 15 Q3 18 Q2 21 Q1 24 Q2 26

$2.3M in Q4 2012 → $609M now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Klaviyo Inc 46.8% Unchanged 18,852,778 $285M
Lifestance Health Group Inc 41.0% Trimmed 20% 23,310,115 $250M
AK A K A Brands Hldg Corp 10.6% Unchanged 6,053,693 $64.8M
A10 Networks Inc 1.2% Unchanged 200,065 $7.47M
MT Macom Tech Solutions Hldgs I 0.4% Trimmed 88% 6,005 $2.28M

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed July 30, 2026

Company Action Shares changed Value of change % of portfolio
Lifestance Health Group Inc Trimmed −5,899,661 −$63.2M 41.0%
AH Aveanna Healthcare Hldgs Inc Exited −5,451,422 −$35.1M —
MT Macom Tech Solutions Hldgs I Trimmed −43,268 −$16.5M 0.4%
Solo Brands Inc Exited −1,100,870 −$4.14M —

Q1 2026

quarter ended March 31, 2026 · filed May 08, 2026

Company Action Shares changed Value of change % of portfolio
JH Jamf Holdings Corp Exited −4,475,381 −$58.2M —
Lifestance Health Group Inc Trimmed −4,314,939 −$27.5M 27.8%
AH Aveanna Healthcare Hldgs Inc Trimmed −2,100,000 −$13.5M 5.2%
MT Macom Tech Solutions Hldgs I Added +1,623 +$360K 1.6%
A10 Networks Inc Added +12,698 +$294K 0.7%

Q4 2025

quarter ended December 31, 2025 · filed February 06, 2026

Company Action Shares changed Value of change % of portfolio
AH Aveanna Healthcare Hldgs Inc Trimmed −2,100,000 −$17.2M 5.9%

Q3 2025

quarter ended September 30, 2025 · filed November 04, 2025

Company Action Shares changed Value of change % of portfolio
K( Klaviyo, Inc. (2) Trimmed −11,975,000 −$332M 56.5%
Lifestance Health Group Inc. Trimmed −8,407,643 −$46.2M 19.9%
SB Solo Brands Inc (3) New +1,100,870 +$16.6M 1.8%

Q2 2025

quarter ended June 30, 2025 · filed November 04, 2025

Company Action Shares changed Value of change % of portfolio
K( Klaviyo, Inc. (2) Trimmed −8,000,000 −$269M 73.0%
AH Aveanna Healthcare Hldgs Inc New +9,651,422 +$50.5M 3.6%
SB Solo Brands, Inc. (3) Exited −44,034,960 −$7.4M —
M Markforged Exited −1,473,154 −$6.89M —
8x8, Inc. Exited −69,842 −$140K —

Q1 2025

quarter ended March 31, 2025 · filed May 05, 2025

Company Action Shares changed Value of change % of portfolio
K( Klaviyo, Inc. (2) Trimmed −2,000,000 −$60.5M 72.9%
Macom Technology Solutions Holdings Inc. Added +2,138 +$215K 0.3%
A10 Networks, Inc. Added +12,903 +$211K 0.2%
8x8, Inc. New +69,842 +$140K —

Q4 2024

quarter ended December 31, 2024 · filed February 04, 2025

Company Action Shares changed Value of change % of portfolio
K( Klaviyo, Inc. (2) Trimmed −5,600,000 −$231M 75.4%
A10 Networks, Inc. Trimmed −431,799 −$7.95M 0.1%
8x8, Inc. Exited −52,919 −$108K —

Q3 2024

quarter ended September 30, 2024 · filed October 31, 2024

Company Action Shares changed Value of change % of portfolio
K( Klaviyo, Inc. (2) Trimmed −1,313,851 −$46.5M 73.3%
M( Markforged (3) New +1,473,154 +$7.03M 0.3%
M Markforged Exited −14,731,565 −$6.04M —

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