Summit Partners L P

SEC CIK: 0000830588

SEC filings (opens in a new tab)

In the past year, 1 open-market sale filing worth $88.5M and no purchases.

Current role at each company

KVYO Klaviyo, Inc.10% Owneras of Aug 13, 2026
SBDS Solo Brands, Inc.10% Owneras of Jan 5, 2026
LFST LifeStance Health Group, Inc.10% Owneras of Aug 20, 2025
ESMT EngageSmart, Inc.10% Owneras of Mar 7, 2023
ATEN A10 Networks, Inc.10% Owneras of Sep 9, 2022

Open-market trades in the past year

Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.

Bought: –; 0 filings
Sold: $88.5M; 1 filing
Net: −$88.5M; Bought minus sold
Companies: 1; With open-market trades

Trades

Every Form 4 that lists Summit Partners L P as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.

Transaction type

Role

Minimum value (USD)

Filed from

Filed to

Filing delay at least (days)

Filing delay at most (days)

KVYO Klaviyo, Inc.

10% Owner25 trades

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change
Sep 22, 2023 (view filing)4:21 PM ET	Sep 22	Same day	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−4.92M	$28.32	−$139.3M	−100.0%0 after
Oct 23, 2023 (view filing)5:10 PM ET	Oct 23	Same day	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−1.77M	$28.32	−$50.1M	−100.0%0 after
Aug 20, 2024 (view filing)5:44 PM ET	Aug 16	4 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−242.6K	$31.78	−$7.71M	−100.0%0 after
Aug 22, 2024 (view filing)4:06 PM ET	Aug 20	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−135.9K	$31.95	−$4.34M	−100.0%0 after
Aug 23, 2024 (view filing)4:02 PM ET	Aug 21	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−113.8K	$31.76	−$3.62M	−100.0%0 after
Aug 26, 2024 (view filing)5:16 PM ET	Aug 22	4 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−82.5K	$31.76	−$2.62M	−100.0%0 after
Aug 27, 2024 (view filing)4:02 PM ET	Aug 23	4 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−305.6K	$32.33	−$9.88M	−100.0%0 after
Aug 28, 2024 (view filing)4:13 PM ET	Aug 26	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−90.5K	$32.27	−$2.92M	−100.0%0 after
Aug 29, 2024 (view filing)4:03 PM ET	Aug 27	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−67.4K	$32.29	−$2.18M	−100.0%0 after
Aug 30, 2024 (view filing)4:01 PM ET	Aug 28	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−27.4K	$31.68	−$869.5K	−100.0%0 after

See all 25 trades at KVYO

LFST LifeStance Health Group, Inc.

10% Owner2 trades

Insider trades
Filed (ET)	Trade date	Filing delay	Insider	Transaction	Shares	Avg price	Value	Holding change	Flags
May 29, 2024 (view filing)4:59 PM ET	May 24	5 days	Summit Partners L P and 5 othersOther: Manager of GP of 10% owner	SSale	−3.80M	$5.89	−$22.4M	−8.3%41.9M after	Duplicate filing
Aug 20, 2025 (view filing)4:34 PM ET	Aug 18	2 days	Summit Partners L P and 5 others10% Owner	SSale	−8.41M	$5.07	−$42.6M	−20.1%33.5M after	Duplicate filing

ESMT EngageSmart, Inc.