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SUMMIT PARTNERS L P

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13F filer, CIK 830588, BOSTON, MA

SUMMIT PARTNERS L P reported $1,050,994,313 across 8 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-02-06.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0000830588-26-000001

Period
2025-12-31
Reported value
$1.05B
Holdings
8
Top 10 weight
100%
New
0
Sold out
0

Part of the filer group SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC

How groups are built

Largest buys vs the previous quarter

None.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
AVAHreduced-2,100,000-$17.2M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2025

Share positions as resolved from 13F-HR 0000830588-26-000001, largest first. % of portfolio is the value over $1,050,994,314, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
KVYOKLAVIYO INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 46,427,778 shares; 2024Q4: 40,827,778 shares; 2025Q1: 38,827,778 shares; 2025Q2: 30,827,778 shares; 2025Q3: 18,852,778 shares; 2025Q4: 18,852,778 shares 18,852,778$612M58.24%0Timeline
LFSTLIFESTANCE HEALTH GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 41,932,358 shares; 2024Q4: 41,932,358 shares; 2025Q1: 41,932,358 shares; 2025Q2: 41,932,358 shares; 2025Q3: 33,524,715 shares; 2025Q4: 33,524,715 shares 33,524,715$236M22.46%0Timeline
AKAA K A BRANDS HLDG CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 6,053,693 shares; 2024Q4: 6,053,693 shares; 2025Q1: 6,053,693 shares; 2025Q2: 6,053,693 shares; 2025Q3: 6,053,693 shares; 2025Q4: 6,053,693 shares 6,053,693$64.8M6.16%0Timeline
AVAHAVEANNA HEALTHCARE HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 9,651,422 shares; 2025Q3: 9,651,422 shares; 2025Q4: 7,551,422 shares 7,551,422$61.7M5.87%-2,100,000Timeline
JAMFJAMF HOLDING CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 4,475,381 shares; 2024Q4: 4,475,381 shares; 2025Q1: 4,475,381 shares; 2025Q2: 4,475,381 shares; 2025Q3: 4,475,381 shares; 2025Q4: 4,475,381 shares 4,475,381$58.2M5.54%0Timeline
MTSIMACOM TECH SOLUTIONS HLDGS IQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 45,512 shares; 2024Q4: 45,512 shares; 2025Q1: 47,650 shares; 2025Q2: 47,650 shares; 2025Q3: 47,650 shares; 2025Q4: 47,650 shares 47,650$8.16M0.78%0Timeline
SBDSSOLO BRANDS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 1,100,870 shares; 2025Q4: 1,100,870 shares 1,100,870$6.66M0.63%0Timeline
ATENA10 NETWORKS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 606,263 shares; 2024Q4: 174,464 shares; 2025Q1: 187,367 shares; 2025Q2: 187,367 shares; 2025Q3: 187,367 shares; 2025Q4: 187,367 shares 187,367$3.31M0.32%0Timeline

How Q4 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0000830588-26-000001 base2026-02-06acceptance time not in the bulk data set