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Livermore
Livermore
ZHEN

Mattern Wealth Management LLC

SEC CIK
0001802376
Latest filing
Jul 23, 2026

The latest 13F from Mattern Wealth Management LLC covers Q2 2026 (filed Jul 23, 2026): 183 long positions worth $609.3M. The top 10 holdings make up 54.4% of the portfolio, and the largest is Dimensional U.S. Core Equity 2 ETF at 13.8%. 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
33
Est. +$20.8M
Added
73
Est. +$36.8M
Reduced
27
Est. −$2.32M
Sold out
8
Est. −$4.71M

Top 5 holdings

Share of this quarter's portfolio value

  1. Dimensional U.S. Core Equity 2 ETF25434V708
    13.8%$84.1M
  2. American Centy ETF Tr025072885
    8.0%$48.6M
  3. Dimensional ETF Trust25434V799
    6.2%$38.1M
  4. Dimensional ETF Trust25434V864
    4.7%$28.9M
  5. Dimensional ETF Trust25434V849
    4.4%$26.5M

Biggest buys

New and added positions, by estimated amount bought

  1. Schwab US Dividend Equity ETF808524797
    +$4.22MNew
  2. Dimensional ETF Trust25434V807
    +$3.96MAdded
  3. Dimensional ETF Trust25434V732
    +$3.95MAdded
  4. Schwab Fundamental U.S. Large Company ETF808524771
    +$3.73MNew
  5. Invesco QQQ Trust Series I46090E103
    +$3.16MAdded

Largest weight increases

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

  1. Invesco QQQ Trust Series I46090E103
    +0.77 pp3.5% → 4.2%
  2. Schwab US Dividend Equity ETF808524797
    +0.69 pp0.0% → 0.7%
  3. Dimensional ETF Trust25434V732
    +0.63 pp2.1% → 2.7%
  4. Schwab Fundamental U.S. Large Company ETF808524771
    +0.61 pp0.0% → 0.6%
  5. Dimensional ETF Trust25434V807
    +0.45 pp1.5% → 1.9%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. Dimensional ETF Trust25434V658
    −$3.05MSold out
  2. American Centy ETF Tr025072687
    −$620.7KReduced
  3. ACNAccenture plc
    −$387.7KSold outHistory
  4. SPGIS&P Global Inc.
    −$271.1KSold outHistory
  5. Schwab Strategic Tr808524656
    −$221.9KSold out

Largest weight decreases

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

  1. Dimensional ETF Trust25434V658
    −0.59 pp0.6% → 0.0%
  2. American Centy ETF Tr025072687
    −0.41 pp1.9% → 1.5%
  3. MCDMcDonalds Corp
    −0.13 pp0.5% → 0.3%History
  4. ABTAbbott Laboratories
    −0.12 pp0.4% → 0.2%History
  5. PSXPhillips 66
    −0.12 pp0.5% → 0.4%History

Metrics

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

Portfolio value
$609.3M
+$96.5M (+18.8%) vs. prior quarter
Positions
183
+25 vs. prior quarter
Top 10 concentration
54.4%
Top 10 as share of value
Turnover
1.3%
Q2 2026, one quarter
Average holding period
15.8 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 $609.3M (Q2 2026)

Q1 2021: $283.7MQ2 2021: $313.8MQ3 2021: $297.4MQ4 2021: $340.5MQ1 2022: $305.4MQ2 2022: $255.5MQ3 2022: $248.8MQ4 2022: $247.3MQ1 2023: $302.0MQ2 2023: $342.7MQ3 2023: $341.1MQ4 2023: $389.0MQ1 2024: $411.1MQ2 2024: $416.0MQ3 2024: $455.0MQ4 2024: $453.4MQ1 2025: $452.0MQ2 2025: $480.5MQ3 2025: $500.9MQ4 2025: $519.5MQ1 2026: $512.9MQ2 2026: $609.3M
Q1 2021Q2 2026
13F filings of Mattern Wealth Management LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Jul 23, 2026183$609.3MDimensional U.S. Core Equity 2 ETFAmerican Centy ETF TrDimensional ETF Trustvs. Q1 2026SEC
Q1 2026Apr 23, 2026158$512.9MDimensional U.S. Core Equity 2 ETFAmerican Centy ETF TrDimensional ETF Trustvs. Q4 2025SEC
Q4 2025Jan 16, 2026156$519.5MDimensional U.S. Core Equity 2 ETFAmerican Centy ETF TrDimensional ETF Trustvs. Q3 2025SEC
Q3 2025Oct 20, 2025156$500.9MDimensional U.S. Core Equity 2 ETFAmerican Centy ETF TrDimensional ETF Trustvs. Q2 2025SEC
Q2 2025Jul 17, 2025161$480.5MDimensional U.S. Core Equity 2 ETFAmerican Centy ETF TrDimensional ETF Trustvs. Q1 2025SEC
Q1 2025Apr 23, 2025166$452.0MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustAmerican Centy ETF Trvs. Q4 2024SEC
Q4 2024Jan 22, 2025169$453.4MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustAAPLvs. Q3 2024SEC
Q3 2024Oct 21, 2024174$455.0MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustMSFTvs. Q2 2024SEC
Q2 2024Jul 17, 2024172$416.0MDimensional U.S. Core Equity 2 ETFMSFTDimensional ETF Trustvs. Q1 2024SEC
Q1 2024May 14, 2024177$411.1MMSFTDimensional ETF TrustDimensional ETF Trustvs. Q4 2023SEC
Q4 2023Feb 12, 2024172$389.0MDimensional ETF TrustMSFTDimensional ETF Trustvs. Q3 2023SEC
Q3 2023Nov 1, 2023167$341.1MDimensional ETF TrustMSFTAAPLvs. Q2 2023SEC
Q2 2023Jul 26, 2023161$342.7MDimensional ETF TrustMSFTAAPLvs. Q1 2023SEC
Q1 2023May 5, 2023169$302.0MMSFTAAPLDimensional ETF Trustvs. Q4 2022SEC
Q4 2022Feb 6, 2023162$247.3MMSFTAAPLDimensional ETF Trustvs. Q3 2022SEC
Q3 2022Nov 1, 2022157$248.8MDimensional ETF TrustMSFTAAPLvs. Q2 2022SEC
Q2 2022Jul 25, 2022151$255.5MMSFTDimensional ETF TrustFirst Trust Rising Dividend Achievers ETFvs. Q1 2022SEC
Q1 2022Apr 14, 2022157$305.4MMSFTDimensional ETF TrustFirst Trust Rising Dividend Achievers ETFvs. Q4 2021SEC
Q4 2021Jan 27, 2022168$340.5MMSFTiShares S&P 500 Growth ETFDimensional ETF Trustvs. Q3 2021SEC
Q3 2021Oct 13, 2021162$297.4MMSFTAAPLFirst Tr Exchange-Traded FDvs. Q2 2021SEC
Q2 2021Jul 27, 2021168$313.8MMSFTAAPLFirst Tr Exchange-Traded FDvs. Q1 2021SEC
Q1 2021May 13, 2021154$283.7MMSFTAAPLiShares S&P Mid-Cap 400 Value ETF–SEC