Funds › Summit Partners LP
Summit Partners LP
13F for Q3 2026, filed Oct 29, 2026. 5 positions worth $490.9M.Managers with more than $100 million in US-listed stocks list their holdings each quarter, within 45 days of quarter end. Long positions only: no short sales or cash.
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Holdings, Q3 2026
Largest first. Common shares only.
| # | The fund's own figures at the end of the quarter. A report can be up to 45 days old when it is filed. Options and bonds are not counted here. | Filing | ||||
|---|---|---|---|---|---|---|
| 1 | KVYO Klaviyo, Inc. | 13.85M | $217.9M | 44.4% | -26.5% | 13F ↗ |
| 2 | LFST LifeStance Health Group, Inc. | 16.62M | $200.0M | 40.7% | -28.7% | 13F ↗ |
| 3 | AKA a.k.a. Brands Holding Corp. | 6.05M | $65.9M | 13.4% | Unchanged | 13F ↗ |
| 4 | ATEN A10 Networks, Inc. | 200,065 | $5.4M | 1.1% | Unchanged | 13F ↗ |
| 5 | MTSI MACOM Technology Solutions Holdings, Inc. | 6,005 | $1.7M | 0.3% | Unchanged | 13F ↗ |
Changes since Q2 2026
0 new, 0 added to, 2 trimmed, 0 exited, 3 unchanged. By estimated dollars.
New positions (0)
None this quarter.
Added to (0)
None this quarter.
Trimmed (2)
Exited (0)
None this quarter.
The 10 largest of each, by estimated dollars: shares changed times the later report's price. Index tracking, splits and mergers move positions too.
Compare two quarters
Pick any two quarters: what is new, added to, trimmed or exited. Premium plan.
Reported value by quarter
Value and number of positions at the end of each quarter.
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Largest positions in earlier quarters
Pick a quarter to see what the fund's biggest positions were then.
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Ten largest positions
By value, Q3 2026.
Filings
| Filing | ||||||
|---|---|---|---|---|---|---|
| Q3 2026 | Oct 29, 2026 | 13F-HR | 5 | $490.9M | Current | SEC ↗ |
| Q2 2026 | Jul 30, 2026 | 13F-HR | 5 | $608.9M | Current | SEC ↗ |
| Q1 2026 | May 8, 2026 | 13F-HR | 7 | $670.2M | Current | SEC ↗ |
| Q4 2025 | Feb 6, 2026 | 13F-HR | 8 | $1.1B | Current | SEC ↗ |
| Q3 2025 | Nov 4, 2025 | 13F-HR | 8 | $924.3M | Current | SEC ↗ |
| Q2 2025 | Nov 4, 2025 | 13F-HR/A (restatement) | 7 | $1.4B | Current | SEC ↗ |
| Q2 2025 | Jul 16, 2025 | 13F-HR | 7 | $1.4B | Replaced | SEC ↗ |
| Q1 2025 | May 5, 2025 | 13F-HR | 9 | $1.6B | Current | SEC ↗ |
Most recent first, up to 80. An amendment can replace a report or add holdings to it. All 13F filings
Information, not investment advice. Values are the fund's own figures at quarter end; a report can be up to 45 days old when filed. Disclaimer