SP
Summit Partners L P 13F Filings Tracker & Latest Positions (Q2 2026)
Summit Partners L PCIK: 0000830588
Concentrated strategySector-focusedQuality / disciplined sizing
Total reported value
$608.9M
Reporting period: 2026-06-30 · Number of holdings: 5
SUMMIT PARTNERS L P disclosed 5 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $608.9M and a quarterly turnover rate of 31.1%.
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Personality snowflake
- Concentration
- 100
- Portfolio Stability
- 31.1
- Momentum
- 50
- Sector conviction
- 100
- Diversification
- 10
- Sizing Uniformity
- 88.87
Summit Partners L P's disclosed holdings carry a Herfindahl concentration index of 0.398 — mathematically equivalent to about 3 equally-sized positions, close to its 5 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 1.11), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 0% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd LFST
-20.2% $63.6M
Trim KVYO
0.0% -$82.2M
Sold out AVAH
Add AKA
0.0% $2.4M
Trim MTSI
-87.8% -$8.7M
Sold out SBDS
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | KVYO | Klaviyo Inc-a | Stock-Other | 46.75% | -7.99% | — | |
| 2 | LFST | Lifestance Health Group Inc | Stock-Other | 41.00% | +13.24% | -20.20% | |
| 3 | AKA | Aka Brands Holding CORP | Stock-Other | 10.65% | +1.33% | — | |
| 4 | ATEN | A10 Networks Inc | Stock-Other | 1.23% | +0.54% | — | |
| 5 | MTSI | Macom Technology Solutions H | Stock-Tech | 0.38% | -1.25% | -87.81% |
Portfolio Performance
Performance for Q3 2026
+38.5%
Performance Last 4 Quarters
0%
- Stdev
- +35.6%
- Beta
- +0.7
- Alpha
- -8.3%
- Max Drawdown
- -49.3%
- Annualized Perf
- +0.2%
- Batting Avg vs S&P
- +48.5%
- Sortino
- +0.26
- Stutzer
- +0.05
- Treynor
- +0.09
- Sterling
- 0
- Calmar
- 0
- Information Ratio
- -0.42
- Tracking Error
- +34.8%
- Stdev Down
- +24.7%
- Winning Months %
- +51.5%
- Losing Months %
- +48.5%
- Best 12 Months
- +62.9%
- Worst 12 Months
- -41.3%
- Efficiency Ratio
- 0
- Sharpe
- +0.18
- Stdev Sectors
- 0%
- Skewness
- -0.24
- Kurtosis
- -0.88
- Upside Potential
- +2.25
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 5 | $608.9M | 31 | ||
| 2026 Q1 | 7 | $670.2M | 45 | ||
| 2025 Q4 | 8 | $1.1B | 20 | ||
| 2025 Q3 | 8 | $924.3M | 52 | ||
| 2025 Q2 | 7 | $1.4B | 20 | ||
| 2025 Q1 | 9 | $1.6B | 100 | ||
| 2024 Q4 | 8 | $2.2B | 0 | ||
| 2024 Q3 | 9 | $2.2B | 0 | ||
| 2024 Q2 | 9 | $1.7B | 0 | ||
| 2024 Q1 | 10 | $1.8B | 0 | ||
| 2023 Q4 | 11 | $2.7B | 0 | ||
| 2023 Q3 | 11 | $2.9B | 0 | ||
| 2023 Q2 | 10 | $1.4B | 0 | ||
| 2023 Q1 | 10 | $1.4B | 0 | ||
| 2022 Q4 | 10 | $1.2B | 0 | ||
| 2022 Q3 | 11 | $1.4B | 0 | ||
| 2022 Q2 | 11 | $1.5B | 0 | ||
| 2022 Q1 | 12 | $2.3B | 0 | ||
| 2021 Q4 | 11 | $3.1B | 0 | ||
| 2021 Q3 | 9 | $2.9B | 0 | ||
| 2021 Q2 | 5 | $1.9B | 100 | ||
| 2021 Q1 | 4 | $626.7M | 26 | ||
| 2020 Q4 | 5 | $488.5M | 41 | ||
| 2020 Q3 | 6 | $350.6M | 57 | ||
| 2020 Q2 | 5 | $209.0M | 15 | ||
| 2020 Q1 | 5 | $180.3M | 15 | ||
| 2019 Q4 | 6 | $208.4M | 84 | ||
| 2019 Q3 | 8 | $508.8M | 28 | ||
| 2019 Q2 | 8 | $560.2M | 70 | ||
| 2019 Q1 | 7 | $452.4M | 46 | ||
| 2018 Q4 | 7 | $641.8M | 17 | ||
| 2018 Q3 | 8 | $728.8M | 100 | ||
| 2018 Q2 | 10 | $804.4M | 100 | ||
| 2018 Q1 | 7 | $1.2B | 46 | ||
| 2017 Q4 | 7 | $813.8M | 100 | ||
| 2017 Q3 | 6 | $136.2M | 12 | ||
| 2017 Q2 | 6 | $137.6M | 52 | ||
| 2017 Q1 | 7 | $233.5M | 50 | ||
| 2016 Q4 | 7 | $367.7M | 59 | ||
| 2016 Q3 | 6 | $453.6M | 100 | ||
| 2016 Q2 | 2 | $115.7M | 100 | ||
| 2016 Q1 | 3 | $173.4M | 59 | ||
| 2015 Q4 | 3 | $318.9M | 28 | ||
| 2015 Q3 | 3 | $239.6M | 23 | ||
| 2015 Q2 | 3 | $301.7M | 9 | ||
| 2015 Q1 | 3 | $277.0M | 12 | ||
| 2014 Q4 | 4 | $311.1M | 73 | ||
| 2014 Q3 | 6 | $415.8M | 19 | ||
| 2014 Q2 | 5 | $423.5M | 53 | ||
| 2014 Q1 | 4 | $295.6M | 88 | ||
| 2013 Q4 | 6 | $655.6M | 42 | ||
| 2013 Q3 | 5 | $867.6M | 11 | ||
| 2013 Q2 | 5 | $860.4M | 100 |
Holding changes this quarter
Summit Partners L P's most significant position changes for 2026-06-30: Sold out: Aveanna Healthcare Holdings (AVAH); Sold out: Solo Brands Inc - Class A (SBDS); Trim: Lifestance Health Group Inc (LFST) — shares -20.20%; Trim: Macom Technology Solutions H (MTSI) — shares -87.81%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | LFST | Lifestance Health Group Inc | +13.2% | -20.20% | Trim |
| 2 | AKA | Aka Brands Holding CORP | +1.3% | — | Unchanged |
| 3 | ATEN | A10 Networks Inc | +0.5% | — | Unchanged |
| 4 | SBDS | Solo Brands Inc - Class A | -0.6% | EXIT | Sold out |
| 5 | MTSI | Macom Technology Solutions H | -1.3% | -87.81% | Trim |
| 6 | AVAH | Aveanna Healthcare Holdings | -5.2% | EXIT | Sold out |
| 7 | KVYO | Klaviyo Inc-a | -8% | — | Unchanged |
Filing History
FAQ
What is Summit Partners L P and what type of investor is it?
Summit Partners L P is an investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $608.9M, spread across 5 disclosed positions.
What are Summit Partners L P's largest equity positions?
Based on the latest 13F filing, Summit Partners L P's top holdings by market value are:
1. Klaviyo Inc-a (KVYO) — $284.7M (46.8%)
2. Lifestance Health Group Inc (LFST) — $249.7M (41.0%)
3. Aka Brands Holding CORP (AKA) — $64.8M (10.7%)
4. A10 Networks Inc (ATEN) — $7.5M (1.2%)
5. Macom Technology Solutions H (MTSI) — $2.3M (0.4%)
What changes did Summit Partners L P make in its most recent portfolio filing?
In the latest quarter, Summit Partners L P took a more defensive posture — trimming 2 positions and completely exiting 2 holdings. The largest of these moves: Sold out: Aveanna Healthcare Holdings (AVAH); Sold out: Solo Brands Inc - Class A (SBDS); Trim: Lifestance Health Group Inc (LFST) — shares -20.20%; Trim: Macom Technology Solutions H (MTSI) — shares -87.81%
What sectors does Summit Partners L P focus on?
Summit Partners L P is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 100.0%
Investment Profile
Summit Partners L P returned an annualized 0.2% over the trailing 33 months — underperforming the S&P 500 by 8.3 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 0.70 (less volatile than the market) and a 48% quarterly batting average against the index.
Its portfolio is concentrated and moderately active, with 100.0% of the portfolio concentrated in Information Technology.
It has added to its ATEN position over the past two quarters (+$4.2M, now $7.5M), while trimming KVYO over the same stretch (-$327.5M, still holding $284.7M).
Peer Institutions
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SA
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OW
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Developer Access
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