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Livermore
Livermore
ZHEN

Congress Asset Management Co

SEC CIK
0000897378
Latest filing
Jul 7, 2026

The latest 13F from Congress Asset Management Co covers Q2 2026 (filed Jul 7, 2026): 376 long positions worth $16.2B. The top 10 holdings make up 18.6% of the portfolio, and the largest is NVIDIA Corp (NVDA) at 3.2%. 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. +$917.9M
Added
147
Est. +$1.54B
Reduced
184
Est. −$1.97B
Sold out
73
Est. −$423.7M

Top 5 holdings

Share of this quarter's portfolio value

  1. NVDANVIDIA Corp
    3.2%$525.8MHistory
  2. AAPLApple Inc.
    2.9%$465.8MHistory
  3. GOOGLAlphabet Inc.
    2.2%$364.6MHistory
  4. MSFTMicrosoft Corp
    1.9%$304.1MHistory
  5. AVGOBroadcom Inc.
    1.7%$278.9MHistory

Share of portfolio

Top 5 holdings and the other 371 positions, by share of portfolio value

  1. NVDA3.2%
  2. AAPL2.9%
  3. GOOGL2.2%
  4. MSFT1.9%
  5. AVGO1.7%
  6. Other 371 positions88.0%

Biggest buys

New and added positions, by estimated amount bought

  1. ARMArm Holdings PLC
    +$145.0MNewHistory
  2. KLICKulicke & Soffa Industries Inc
    +$117.4MNewHistory
  3. MIRMirion Technologies, Inc.
    +$99.9MAddedHistory
  4. AROCArchrock, Inc.
    +$90.1MNewHistory
  5. COCOVita Coco Company, Inc.
    +$79.8MNewHistory

Largest weight increases

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

  1. ARMArm Holdings PLC
    +0.89 pp0.0% → 0.9%History
  2. KLICKulicke & Soffa Industries Inc
    +0.72 pp0.0% → 0.7%History
  3. MIRMirion Technologies, Inc.
    +0.59 pp0.1% → 0.7%History
  4. LGNDLigand Pharmaceuticals Inc
    +0.56 pp0.7% → 1.3%History
  5. AROCArchrock, Inc.
    +0.56 pp0.0% → 0.6%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. STRLSterling Infrastructure, Inc.
    −$223.8MReducedHistory
  2. MLMMartin Marietta Materials Inc
    −$102.1MReducedHistory
  3. PENPenumbra Inc
    −$96.3MReducedHistory
  4. TMOThermo Fisher Scientific Inc.
    −$96.2MReducedHistory
  5. ANETArista Networks, Inc.
    −$94.5MReducedHistory

Largest weight decreases

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

  1. PRIMPrimoris Services Corp
    −0.84 pp0.8% → <0.1%History
  2. MLMMartin Marietta Materials Inc
    −0.79 pp1.0% → 0.2%History
  3. BSXBoston Scientific Corp
    −0.73 pp0.7% → <0.1%History
  4. PENPenumbra Inc
    −0.72 pp0.7% → <0.1%History
  5. TMOThermo Fisher Scientific Inc.
    −0.68 pp0.7% → <0.1%History

Metrics

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

Portfolio value
$16.2B
+$2.27B (+16.3%) vs. prior quarter
Positions
376
−41 vs. prior quarter
Top 10 concentration
18.6%
Top 10 as share of value
Turnover
15.8%
Q2 2026, one quarter
Average holding period
12.7 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 $16.2B (Q2 2026)

Q1 2021: $11.1BQ2 2021: $12.0BQ3 2021: $12.8BQ4 2021: $13.1BQ1 2022: $11.8BQ2 2022: $10.4BQ3 2022: $9.33BQ4 2022: $9.97BQ1 2023: $10.7BQ2 2023: $11.5BQ3 2023: $11.3BQ4 2023: $12.7BQ1 2024: $14.0BQ2 2024: $14.0BQ3 2024: $14.7BQ4 2024: $14.8BQ1 2025: $13.4BQ2 2025: $14.6BQ3 2025: $15.0BQ4 2025: $14.2BQ1 2026: $14.0BQ2 2026: $16.2B
Q1 2021Q2 2026
13F filings of Congress Asset Management Co by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Jul 7, 2026376$16.2BNVDAAAPLGOOGLvs. Q1 2026SEC
Q1 2026Apr 14, 2026417$14.0BNVDAAAPLGOOGLvs. Q4 2025SEC
Q4 2025Jan 9, 2026381$14.2BNVDAAAPLGOOGLvs. Q3 2025SEC
Q3 2025Oct 10, 2025392$15.0BNVDAAAPLMSFTvs. Q2 2025SEC
Q2 2025Jul 16, 2025382$14.6BNVDAMSFTAAPLvs. Q1 2025SEC
Q1 2025Apr 11, 2025365$13.4BAAPLNVDAMSFTvs. Q4 2024SEC
Q4 2024Jan 30, 2025386$14.8BAAPLNVDAMSFTvs. Q3 2024SEC
Q3 2024Oct 28, 2024357$14.7BAAPLNVDAMSFTvs. Q2 2024SEC
Q2 2024Aug 2, 2024364$14.0BNVDAAAPLMSFTvs. Q1 2024SEC
Q1 2024Apr 11, 2024357$14.0BNVDAMSFTAAPLvs. Q4 2023SEC
Q4 2023Mar 4, 2024371$12.7BAAPLDRIMSFTvs. Q3 2023SEC
Q3 2023Nov 1, 2023374$11.3BAAPLDRIMSFTvs. Q2 2023SEC
Q2 2023Jul 27, 2023373$11.5BAAPLDRIMSFTvs. Q1 2023SEC
Q1 2023Apr 21, 2023368$10.7BAAPLDRICIENvs. Q4 2022SEC
Q4 2022Jan 18, 2023375$9.97BPAYCAAPLCIENvs. Q3 2022SEC
Q3 2022Nov 8, 2022365$9.33BPAYCAAPLFirst Rep BK San Francisco Cvs. Q2 2022SEC
Q2 2022Aug 2, 2022366$10.4BGOOGGOOGLAAPLvs. Q1 2022SEC
Q1 2022Apr 20, 2022361$11.8BAAPLENTGFirst Rep BK San Francisco Cvs. Q4 2021SEC
Q4 2021Jan 28, 2022366$13.1BFirst Rep BK San Francisco CCIENAAPLvs. Q3 2021SEC
Q3 2021Nov 8, 2021357$12.8BPAYCFirst Rep BK San Francisco CAAPLvs. Q2 2021SEC
Q2 2021Aug 5, 2021362$12.0BFirst Rep BK San Francisco CGNRCAMZNvs. Q1 2021SEC
Q1 2021May 5, 2021355$11.1BFirst Rep BK San Francisco CPAYCCIEN–SEC

13D and 13G filings

Companies where Congress Asset Management Co reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

1 company, largest stake first.

Companies where Congress Asset Management Co owns 5% or more
CompanyLatest formStakeChangeFirst filedLatest filingFiling
UFPTUfp Technologies Inc13G5.40%416.8K sharesNewApr 23, 20261 filingApr 23, 2026SEC

Latest filings

1 filing on file made by Congress Asset Management Co or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Congress Asset Management Co
CompanyFiled (ET)FormStakeChangeEvent dateFiling
UFPTUfp Technologies IncApr 23, 20263:00 PM ET13G5.40%416.8K sharesNewMar 31, 2026SEC