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Disclosery

SUMMIT PARTNERS L P

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13F filer, CIK 830588, BOSTON, MA

SUMMIT PARTNERS L P reported $608,921,882 across 5 holdings for the quarter ended 2026-06-30, in a 13F-HR filed 2026-07-30.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001172661-26-002948

Period
2026-06-30
Reported value
$609M
Holdings
5
Top 10 weight
100%
New
0
Sold out
2

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
LFSTreduced-5,899,661-$63.2M
AVAHexited-5,451,422-$35.1M
MTSIreduced-43,268-$16.5M
SBDSexited-1,100,870-$4.14M

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, Q2 2026

Share positions as resolved from 13F-HR 0001172661-26-002948, largest first. % of portfolio is the value over $608,921,882, 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; 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; 2026Q2: 18,852,778 shares 18,852,778$285M46.75%0Timeline
LFSTLIFESTANCE HEALTH GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q2: 23,310,115 shares 23,310,115$250M41%-5,899,661Timeline
AKAA K A BRANDS HLDG CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q2: 6,053,693 shares 6,053,693$64.8M10.65%0Timeline
ATENA10 NETWORKS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q2: 200,065 shares 200,065$7.47M1.23%0Timeline
MTSIMACOM TECH SOLUTIONS HLDGS IQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2026Q2: 6,005 shares 6,005$2.28M0.38%-43,268Timeline

Sold out in Q2 2026

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

SecurityShares beforeValue beforeType
AVAHAVEANNA HEALTHCARE HLDGS INC5,451,422$35.1Mshares
SBDSSOLO BRANDS INC1,100,870$4.14Mshares

How Q2 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 0001172661-26-002948 base2026-07-30acceptance time not in the bulk data set