Summit Partners L P - Insider Trading & Ownership

Location
222 Berkeley Street, 18 Th Floor, Boston, MA
Summary
The estimated value of insider holdings of Summit Partners L P is at least $811M dollars as of September 10, 2025. Summit Partners L P is the 10%+ Owner of EngageSmart, Inc. and owns shares of EngageSmart, Inc. stock worth about $573M. Summit Partners L P is the 10%+ Owner of LifeStance Health Group, Inc. and owns shares of LifeStance Health Group, Inc. (LFST) stock worth about $170M. Summit Partners L P is the 10%+ Owner of A10 Networks, Inc. and owns shares of A10 Networks, Inc. (ATEN) stock worth about $68.5M. Summit Partners L P is the 10%+ Owner of Klaviyo, Inc. and owns shares of Klaviyo, Inc. (KVYO) stock worth about $388K.
Signature
/s/ Adam Hennessey, as attorney-in-fact for Summit Partners, L.P.
All Insider Reports
All Insider Reports

Ownership of Summit Partners L P

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
ESMT EngageSmart, Inc. 10%+ Owner $573M Mar 7, 2023
LFST LifeStance Health Group, Inc. 10%+ Owner $170M -$42.6M -20.1% Aug 18, 2025
ATEN A10 Networks, Inc. 10%+ Owner $68.5M Sep 8, 2022
KVYO Klaviyo, Inc. 10%+ Owner $388K -$764M -99.9% Sep 8, 2025
DTCB Solo Brands, Inc. 10%+ Owner Oct 28, 2021

Insider Transactions Reported by Summit Partners L P:

Sym Company Class Transaction % Value $ * Price $ Shares Shares After Date Ownership
* An asterisk sign (*) next to the price indicates that the price is likely invalid.