Skip to main content
Livermore
Livermore
ZHEN

Summit Partners Public Asset Management, LLC

SEC CIK
0001638555
Latest filing
Aug 14, 2026

The latest 13F from Summit Partners Public Asset Management, LLC covers Q2 2026 (filed Aug 14, 2026): 79 long positions worth $3.85B. The top 10 holdings make up 39.1% of the portfolio, and the largest is Sandisk Corp (SNDK) at 9.2%. Livermore has 22 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q2 2026

Share counts compared with Q1 2026: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
32
Est. +$1.19B
Added
17
Est. +$331.2M
Reduced
28
Est. −$534.2M
Sold out
19
Est. −$422.9M

Top 5 holdings

Share of this quarter's portfolio value

  1. SNDKSandisk Corp
    9.2%$353.3MHistory
  2. GHGuardant Health, Inc.
    3.8%$145.2MHistory
  3. MKSIMKS Inc
    3.7%$142.3MHistory
  4. DOCNDigitalOcean Holdings, Inc.
    3.6%$139.4MHistory
  5. SEISolaris Energy Infrastructure, Inc.
    3.5%$136.2MHistory

Share of portfolio

Top 5 holdings and the other 74 positions, by share of portfolio value

  1. SNDK9.2%
  2. GH3.8%
  3. MKSI3.7%
  4. DOCN3.6%
  5. SEI3.5%
  6. Other 74 positions76.2%

Biggest buys

New and added positions, by estimated amount bought

  1. SNOWSnowflake Inc.
    +$112.1MNewHistory
  2. HUTHut 8 Corp.
    +$110.7MNewHistory
  3. DDOGDatadog, Inc.
    +$103.4MNewHistory
  4. ONTOOnto Innovation Inc.
    +$87.8MNewHistory
  5. ORKAOruka Therapeutics, Inc.
    +$62.7MNewHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. SNOWSnowflake Inc.
    +2.91 pp0.0% → 2.9%History
  2. HUTHut 8 Corp.
    +2.87 pp0.0% → 2.9%History
  3. DDOGDatadog, Inc.
    +2.69 pp0.0% → 2.7%History
  4. ONTOOnto Innovation Inc.
    +2.28 pp0.0% → 2.3%History
  5. NBISNebius Group N.V.
    +1.88 pp1.3% → 3.2%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. INSMINSMED Inc
    −$106.9MSold outHistory
  2. SNDKSandisk Corp
    −$68.4MReducedHistory
  3. AKAMAkamai Technologies Inc
    −$67.0MSold outHistory
  4. SIMOSilicon Motion Technology CORP
    −$64.9MReducedHistory
  5. LSCCLattice Semiconductor Corp
    −$52.5MReducedHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. INSMINSMED Inc
    −4.94 pp4.9% → 0.0%History
  2. IONSIonis Pharmaceuticals Inc
    −3.26 pp4.9% → 1.6%History
  3. AKAMAkamai Technologies Inc
    −3.10 pp3.1% → 0.0%History
  4. TSEMTower Semiconductor Ltd
    −2.12 pp5.6% → 3.5%History
  5. AEISAdvanced Energy Industries Inc
    −1.95 pp2.5% → 0.5%History

Metrics

13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$3.85B
+$1.69B (+78.1%) vs. prior quarter
Positions
79
+13 vs. prior quarter
Top 10 concentration
39.1%
Top 10 as share of value
Turnover
31.9%
Q2 2026, one quarter
Average holding period
4.6 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

22 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $3.85B (Q2 2026)

Q1 2021: $1.83BQ2 2021: $2.00BQ3 2021: $2.21BQ4 2021: $2.09BQ1 2022: $1.82BQ2 2022: $1.26BQ3 2022: $1.21BQ4 2022: $1.37BQ1 2023: $1.78BQ2 2023: $1.97BQ3 2023: $1.58BQ4 2023: $1.84BQ1 2024: $2.09BQ2 2024: $2.17BQ3 2024: $2.22BQ4 2024: $2.99BQ1 2025: $2.09BQ2 2025: $2.57BQ3 2025: $3.07BQ4 2025: $3.55BQ1 2026: $2.16BQ2 2026: $3.85B
Q1 2021Q2 2026
13F filings of Summit Partners Public Asset Management, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 14, 202679$3.85BSNDKGHMKSIvs. Q1 2026SEC
Q1 2026May 15, 202666$2.16BTSEMSNDKINSMvs. Q4 2025SEC
Q4 2025Feb 17, 202669$3.55BSNDKGEVINSMvs. Q3 2025SEC
Q3 2025Nov 14, 202572$3.07BVRNAGEVINSMvs. Q2 2025SEC
Q2 2025Aug 14, 202571$2.57BVRNASPOTGEVvs. Q1 2025SEC
Q1 2025May 15, 202560$2.09BVRNASPOTWGSvs. Q4 2024SEC
Q4 2024Feb 14, 202567$2.99BRDDTALABTSMvs. Q3 2024SEC
Q3 2024Nov 14, 202464$2.22BRDDTSPOTNVDAvs. Q2 2024SEC
Q2 2024Aug 14, 202470$2.17BTSMRDDTNVDAvs. Q1 2024SEC
Q1 2024May 15, 202468$2.09BMUTSMCEGvs. Q4 2023SEC
Q4 2023Feb 14, 202475$1.84BMELIESTCTSMvs. Q3 2023SEC
Q3 2023Nov 14, 202358$1.58BNVDAINSPAMZNvs. Q2 2023SEC
Q2 2023Aug 14, 202369$1.97BNVDAINSPMPWRvs. Q1 2023SEC
Q1 2023May 15, 202366$1.78BFSLRFOURINSPvs. Q4 2022SEC
Q4 2022Feb 14, 202361$1.37BINSPFSLRENPHvs. Q3 2022SEC
Q3 2022Nov 14, 202259$1.21BTSLAENPHPANWvs. Q2 2022SEC
Q2 2022Aug 15, 202261$1.26BCRWDHZNPSITMvs. Q1 2022SEC
Q1 2022May 16, 202262$1.82BCRWDHZNPSITMvs. Q4 2021SEC
Q4 2021Feb 14, 202268$2.09BHZNPABNBSITMvs. Q3 2021SEC
Q3 2021Nov 15, 202167$2.21BHZNPVSATABNBvs. Q2 2021SEC
Q2 2021Aug 16, 202167$2.00BHZNPGNRCRNGvs. Q1 2021SEC
Q1 2021May 17, 202165$1.83BHZNPSLQTLAD–SEC

13D and 13G filings

Companies where Summit Partners Public Asset Management, LLC reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

Summit Partners Public Asset Management, LLC does not currently report owning 5% or more of any company.

Latest filings

9 filings on file made by Summit Partners Public Asset Management, LLC or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Summit Partners Public Asset Management, LLC
CompanyFiled (ET)FormStakeChangeEvent dateFiling
SEISolaris Energy Infrastructure, Inc.Nov 14, 20251:47 PM ET13G/A4.03%1.80M shares−1.19 ppfrom 5.22%Below 5%Sep 30, 2025SEC
WGSGeneDx Holdings Corp.Aug 14, 202512:33 PM ET13G/A3.04%867.3K shares−2.15 ppfrom 5.19%Below 5%Jun 30, 2025SEC
SEISolaris Energy Infrastructure, Inc.May 15, 20254:03 PM ET13G/A5.22%1.99M shares−1.26 ppfrom 6.48%Mar 31, 2025SEC
SEISolaris Energy Infrastructure, Inc.Feb 14, 202512:58 PM ET13G/A6.48%2.40M shares+0.61 ppfrom 5.87%Dec 31, 2024SEC
WGSGeneDx Holdings Corp.Feb 12, 20254:26 PM ET13G5.19%1.43M sharesNewFeb 5, 2025SEC
SEISolaris Energy Infrastructure, Inc.Dec 13, 20243:55 PM ET13G5.87%2.17M sharesNewDec 6, 2024SEC
ACVAACV Auctions Inc.Feb 14, 202213G/AOld format–––SEC
ACVAACV Auctions Inc.Jun 3, 202113GOld format–New–SEC
ONEWOneWater Marine Inc.Feb 16, 202113G/AOld format–––SEC