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Summit Partners

Summit Partners Portfolio holdings

AUM $491M Turnover 0%
1-Year Est. Return 11.09%
This Fund
S&P 500
This Quarter Est. Return
+3.4%
1 Year Est. Return
+11.09%
3 Year Est. Return
+23.17%
5 Year Est. Return
-22.98%
10 Year Est. Return
-29.03%
AUM
$924M
AUM Growth
-$494M
Cap. Flow
-$413M
Cap. Flow %
-44.63%
Top 10 Hldgs %
100%
Holding
8
New
1
Increased
–
Reduced
2
Closed
–
Avg Time Held
4.9 years
Top 10 Avg Time Held
4.9 years
Top 20 Avg Time Held
4.9 years

Top Buys

Rank Stock Value
1
SBDS
Solo Brands Inc
SBDS
+$15.4M

Top Sells

Rank Stock Value
1
KVYO icon
Klaviyo
KVYO
+$387M
2
LFST icon
Lifestance Health
LFST
+$41.2M

Sector Composition

Rank Sector Weight
1 Technology 62.67%
2 Healthcare 29.21%
3 Consumer Discretionary 8.12%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow Held Since
KVYO icon
1
Klaviyo
KVYO
$6.23B
$522M 56.48%
18,852,778
-11,975,000
-39% -$387M
2023 Q3
8 quarters
LFST icon
2
Lifestance Health
LFST
$5.35B
$184M 19.95%
33,524,715
-8,407,643
-20% -$41.2M
2021 Q2
17 quarters
AVAH icon
3
Aveanna Healthcare
AVAH
$2.51B
$85.6M 9.26%
9,651,422
– –
2025 Q2
1 quarter
AKA icon
4
a.k.a. Brands
AKA
$91M
$58.4M 6.32%
6,053,693
– –
2021 Q3
16 quarters
JAMF icon
5
DELISTED
Jamf
JAMF
$47.9M 5.18%
4,475,381
– –
2020 Q3
20 quarters
SBDS
6
DELISTED
Solo Brands Inc
SBDS
$16.6M 1.8%
+1,100,870
New +$15.4M
2025 Q3
0 quarters
MTSI icon
7
MACOM Technology Solutions
MTSI
$17.8B
$5.93M 0.64%
47,650
– –
2013 Q2
49 quarters
ATEN icon
8
A10 Networks
ATEN
$2.06B
$3.4M 0.37%
187,367
– –
2014 Q2
45 quarters

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Summit Partners's Q3 2025 Portfolio in Review

As of Q3 2025, Summit Partners held 8 positions worth $924M, down 35% from $1.42B the previous quarter. Its ten largest holdings account for 100% of the portfolio.

Summit Partners withdrew a net $413M in Q3 2025, reducing 2 holdings. Its largest reduction was Klaviyo, cutting an estimated $387M.

By sector, the portfolio is most concentrated in Technology at 63% of assets, down from 77% a quarter earlier, followed by Healthcare and Consumer Discretionary.

Against the trend, Summit Partners opened a new position in Solo Brands Inc worth $16.6M.

  • Summit Partners's largest Q3 2025 buy was Solo Brands Inc: 1,100,870 shares worth $16.6M.
  • Summit Partners's biggest Q3 2025 reduction was Klaviyo, cutting an estimated $387M.
  • Summit Partners's ten largest holdings make up 100% of its $924M portfolio in Q3 2025.
  • Summit Partners opened 1 new position and closed 0 in Q3 2025.
  • Summit Partners's portfolio value fell 35% quarter-over-quarter to $924M.

Based on Summit Partners's 13F filing for Q3 2025, filed 4 Nov 2025.