Filed: 7/30/2026ACC: 0001172661-26-002948
📋 What this filing means
SUMMIT PARTNERS L P filed this quarterly 13F‑HR report disclosing 5 equity positions with a total reported market value of $608.92M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
5
Positions
$608.92M
Total AUM (reported)
48.42M
Total Shares
Allocation by class
COM SER A$284.68M46.8%
COM$259.41M42.6%
COM SHS$64.84M10.6%
Portfolio Concentration
Top 3$599.16M98.4%
4–10$9.76M1.6%
Top 3 weight
98.4%
Top 10 weight
100.0%
Voting Authority Distribution
Total shares with voting rights: 48.42M
Sole
Full voting authority
48.42M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole5
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings5
Rows:
KLAVIYO INC
SOLEShares18.85M
TypeSH
Market value$284.68M
46.75%
Sole
18.85M
Shared
0.00
None
0.00
LIFESTANCE HEALTH GROUP INC
SOLEShares23.31M
TypeSH
Market value$249.65M
41.00%
Sole
23.31M
Shared
0.00
None
0.00
A K A BRANDS HLDG CORP
SOLEShares6.05M
TypeSH
Market value$64.84M
10.65%
Sole
6.05M
Shared
0.00
None
0.00
A10 NETWORKS INC
SOLEShares200.06K
TypeSH
Market value$7.47M
1.23%
Sole
200.06K
Shared
0.00
None
0.00
MACOM TECH SOLUTIONS HLDGS I
SOLEShares6K
TypeSH
Market value$2.28M
0.38%
Sole
6K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
KLAVIYO INCSOLE | COM SER A | 18.85M | SH | $284.68M 46.75% | 18.85M | 0.00 | 0.00 |
LIFESTANCE HEALTH GROUP INCSOLE | COM | 23.31M | SH | $249.65M 41.00% | 23.31M | 0.00 | 0.00 |
A K A BRANDS HLDG CORPSOLE | COM SHS | 6.05M | SH | $64.84M 10.65% | 6.05M | 0.00 | 0.00 |
A10 NETWORKS INCSOLE | COM | 200.06K | SH | $7.47M 1.23% | 200.06K | 0.00 | 0.00 |
MACOM TECH SOLUTIONS HLDGS ISOLE | COM | 6K | SH | $2.28M 0.38% | 6K | 0.00 | 0.00 |