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
Aug 13, 2026 (view filing)4:30 PM ET	Aug 11	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−5.00M	$17.71	−$88.5M	−100.0%0 after
Sep 10, 2025 (view filing)4:15 PM ET	Sep 8	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−4.00M	$31.87	−$127.5M	−100.0%0 after
Aug 27, 2025 (view filing)4:05 PM ET	Aug 25	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−975.0K	$30.01	−$29.3M	−100.0%0 after
Aug 15, 2025 (view filing)4:17 PM ET	Aug 13	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−6.50M	$30.01	−$195.1M	−92.9%500.0K after
Jun 5, 2025 (view filing)7:13 PM ET	Jun 4	1 day	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−4.00M	$33.35	−$133.4M	−100.0%0 after
May 20, 2025 (view filing)6:25 PM ET	May 19	1 day	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−4.00M	$33.00	−$132.0M	−100.0%0 after
Mar 17, 2025 (view filing)5:11 PM ET	Mar 14	3 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−2.00M	$32.44	−$64.9M	−100.0%0 after
Dec 11, 2024 (view filing)4:57 PM ET	Dec 9	2 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−2.10M	$39.15	−$82.2M	−100.0%0 after
Nov 18, 2024 (view filing)4:25 PM ET	Nov 14	4 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−3.15M	$36.20	−$114.1M	−90.1%346.7K after
Sep 17, 2024 (view filing)4:23 PM ET	Sep 13	4 days	Summit Partners L P and 5 others10% Owner	SSaleSeries A Common Stock, par value $0.001 per share	−113.6K	$31.47	−$3.57M	−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
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
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

ESMT EngageSmart, Inc.