Skip to contentSUMMIT PARTNERS L P — Klaviyo, Inc. insider: 67 transactions · InsiderLensSUMMIT PARTNERS L P
- Mang Mbr of GP of 10% Owner at optionsXpress Holdings, Inc. · on record since Jan 30, 2006
- 10% owner at Klaviyo, Inc. · on record since Sep 22, 2023
- Manager of GP of 10% Owner at NightHawk Radiology Holdings Inc · on record since Feb 13, 2006
- 10% owner at Global Cash Access Holdings, Inc. · on record since May 30, 2006
- 10% owner at SEABRIGHT INSURANCE HOLDINGS INC · on record since Jun 12, 2006
- Manager of GP of 10% Owner at PHYSICIANS FORMULA HOLDINGS, INC. · on record since Nov 16, 2006
- 10% owner at LifeStance Health Group, Inc. · on record since Aug 20, 2025
- Manager of GP of 10% Owner at Fortegra Financial Corp · on record since Dec 22, 2010
- Manager of GP of 10% Owner at FLIGHT SAFETY TECHNOLOGIES INC · on record since Mar 14, 2012
- Manager of GP of 10% Owner at Ubiquiti Networks, Inc. · on record since May 14, 2012
- 10% owner at Solo Brands, Inc. · on record since Oct 28, 2021
- Manager of GP of 10% owner at A10 Networks, Inc. · on record since Jun 12, 2015
- Manager of GP of 10% owner at MTS MEDICATION TECHNOLOGIES, INC /DE/ · on record since Feb 1, 2016
- Director at A10 Networks, Inc. · on record since Nov 9, 2018
- Manager of GP of 10% owner at LifeStance Health Group, Inc. · on record since Jun 29, 2021
- 10% owner at E-SMART TECHNOLOGIES INC · on record since Sep 23, 2021
- 10% owner at A.K.A. BRANDS HOLDING CORP. · on record since Sep 22, 2021
- 10% owner at A10 Networks, Inc. · on record since Jun 28, 2022
- Mang Mbr of GP of 10% Owner at Global Cash Access Holdings, Inc. · on record since Sep 22, 2005
- Manager of GP of 10% Owner at SEABRIGHT INSURANCE HOLDINGS INC · on record since Dec 8, 2005
Insider trading activity of SUMMIT PARTNERS L P
- Transactions on record
- 67
- since Jan 26, 2005
- Open-market buys
- 0
- Open-market sells
- 25
- $737M
- Companies traded
- 9
- last filing Aug 22, 2025
Figures computed from official regulatory filings — methodology.
Companies where SUMMIT PARTNERS L P has traded
- Klaviyo, Inc.26 tx · $105.2M · Aug 22, 2025
- LifeStance Health Group, Inc.2 tx · $62M · Aug 20, 2025
- MTS MEDICATION TECHNOLOGIES, INC /DE/1 tx · $63.9M · Feb 11, 2015
- Fortegra Financial Corp1 tx · $124.4M · Dec 4, 2014
- FLIGHT SAFETY TECHNOLOGIES INC2 tx · $357.5M · Sep 12, 2013
- Global Cash Access Holdings, Inc.14 tx · $16M · May 21, 2009
- NightHawk Radiology Holdings Inc6 tx · $8M · Aug 15, 2006
- SEABRIGHT INSURANCE HOLDINGS INC8 tx · Jun 12, 2006
- optionsXpress Holdings, Inc.7 tx · Jul 27, 2005
Track record of SUMMIT PARTNERS L P
Insufficient history for a statistical track record (fewer than 5 open-market buys).
Transaction history of SUMMIT PARTNERS L P
Co-insiders of SUMMIT PARTNERS L P
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Summit Investors I (UK), L.P.A10 Networks, Inc. +4
| Company | Filed | Type | Qty | Price | Value · USD | Src |
|---|
| Aug 22, 2025 | Other | -500,000 | 0.00 USD | $0 | SEC |
| Aug 20, 2025 | Sell | -8,407,643 | 5.07 USD | $42.6M | SEC |
| Dec 11, 2024 | Other | 2,100,000 | — | — | SEC |
| Dec 11, 2024 | OtherD | 2,100,000 | 0.00 USD | $0 | SEC |
| Dec 11, 2024 | Sell | -2,100,000 | 39.15 USD | $82.2M | SEC |
| Nov 25, 2024 | Other | -346,707 | 0.00 USD | $0 | SEC |
| Sep 16, 2024 | Other | 107,205 | — | — | SEC |
| Sep 16, 2024 | OtherD | 107,205 | 0.00 USD | $0 | SEC |
| Sep 16, 2024 | Sell | -107,205 | 31.33 USD | $3.4M | SEC |
| Sep 13, 2024 | Sell | -2,942 | 31.01 USD | $91.2K | SEC |
| Sep 13, 2024 | OtherD | 2,942 | 0.00 USD | $0 | SEC |
| Sep 13, 2024 | Other | 2,942 | — | — | SEC |
| Sep 5, 2024 | OtherD | 6,039 | 0.00 USD | $0 | SEC |
| Sep 5, 2024 | Sell | -6,039 | 31.53 USD | $190.4K | SEC |
| Sep 5, 2024 | Other | 6,039 | — | — | SEC |
| Aug 29, 2024 | OtherD | 67,436 | 0.00 USD | $0 | SEC |
| Aug 29, 2024 | Other | 67,436 | — | — | SEC |
| Aug 29, 2024 | Sell | -67,436 | 32.29 USD | $2.2M | SEC |
| Aug 28, 2024 | Sell | -90,502 | 32.27 USD | $2.9M | SEC |
| Aug 28, 2024 | OtherD | 90,502 | 0.00 USD | $0 | SEC |
| Aug 28, 2024 | Other | 90,502 | — | — | SEC |
| Aug 27, 2024 | Sell | -305,638 | 32.33 USD | $9.9M | SEC |
| Aug 27, 2024 | OtherD | 305,638 | 0.00 USD | $0 | SEC |
| Aug 27, 2024 | Other | 305,638 | — | — | SEC |
| Aug 22, 2024 | OtherD | 135,902 | 0.00 USD | $0 | SEC |