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Disclosery

SUMMIT PARTNERS L P

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13F filer, CIK 830588, BOSTON, MA

SUMMIT PARTNERS L P reported $670,154,351 across 7 holdings for the quarter ended 2026-03-31, in a 13F-HR filed 2026-05-08.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001172661-26-001623

Period
2026-03-31
Reported value
$670M
Holdings
7
Top 10 weight
100%
New
0
Sold out
1

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

How groups are built

Largest buys vs the previous quarter

SecurityShares changeApprox. value
MTSIadded+1,623$360K
ATENadded+12,698$294K

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.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
JAMFexited-4,475,381-$58.2M
LFSTreduced-4,314,939-$27.5M
AVAHreduced-2,100,000-$13.5M

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, Q1 2026

Share positions as resolved from 13F-HR 0001172661-26-001623, largest first. % of portfolio is the value over $670,154,351, 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; 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; 2026Q1: 18,852,778 shares 18,852,778$367M54.74%0Timeline
LFSTLIFESTANCE HEALTH GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q1: 29,209,776 shares 29,209,776$186M27.76%-4,314,939Timeline
AKAA K A BRANDS HLDG CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q1: 6,053,693 shares 6,053,693$62.4M9.32%0Timeline
AVAHAVEANNA HEALTHCARE HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q1: 5,451,422 shares 5,451,422$35.1M5.23%-2,100,000Timeline
MTSIMACOM TECH SOLUTIONS HLDGS IQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q1: 49,273 shares 49,273$10.9M1.63%+1,623Timeline
ATENA10 NETWORKS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q1: 200,065 shares 200,065$4.63M0.69%+12,698Timeline
SBDSSOLO BRANDS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 1,100,870 shares; 2025Q4: 1,100,870 shares; 2026Q1: 1,100,870 shares 1,100,870$4.14M0.62%0Timeline

Sold out in Q1 2026

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
JAMFJAMF HOLDING CORP4,475,381$58.2Mshares

How Q1 2026 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 0001172661-26-001623 base2026-05-08acceptance time not in the bulk data set