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Livermore
Livermore
ZHEN

Mason & Associates, LLC

SEC CIK
0001895045
Latest filing
Jul 14, 2026

The latest 13F from Mason & Associates, LLC covers Q2 2026 (filed Jul 14, 2026): 45 long positions worth $480.6M. The top 10 holdings make up 90.7% of the portfolio, and the largest is Vanguard Morningstar Large-Cap ETF at 31.1%. Livermore has 10 filings on Form 13F from this institution, going back to Q1 2024.

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
4
Est. +$842.8K
Added
18
Est. +$8.28M
Reduced
8
Est. −$370.2K
Sold out
3
Est. −$694.7K

Top 5 holdings

Share of this quarter's portfolio value

  1. Vanguard Morningstar Large-Cap ETF922908637
    31.1%$149.6M
  2. iShares Tr46434V613
    28.3%$136.0M
  3. PIMCO ETF Tr72201R585
    5.7%$27.2M
  4. BlackRock ETF Trust09290C103
    5.5%$26.3M
  5. Vanguard Morningstar Mid-Cap ETF922908629
    5.4%$25.8M

Biggest buys

New and added positions, by estimated amount bought

  1. iShares Tr46434V613
    +$2.25MAdded
  2. Vanguard Morningstar Large-Cap ETF922908637
    +$1.99MAdded
  3. PIMCO ETF Tr72201R585
    +$1.05MAdded
  4. Vanguard Morningstar Mid-Cap ETF922908629
    +$639.7KAddedConverted for a 4-for-1 split
  5. Vanguard Mun BD FDS922907746
    +$500.3KAdded

Largest weight increases

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

  1. Vanguard Morningstar Large-Cap ETF922908637
    +1.76 pp29.4% → 31.1%
  2. BlackRock ETF Trust09290C103
    +0.33 pp5.1% → 5.5%
  3. Vanguard Morningstar Mid-Cap ETF922908629
    +0.23 pp5.1% → 5.4%
  4. Vanguard Morningstar Small-Cap ETF922908751
    +0.16 pp2.8% → 2.9%
  5. State Street SPDR Portfolio Developed World Ex-US ETF78463X889
    +0.06 pp4.0% → 4.1%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. XOMExxonMobil Holdings Corp
    −$256.9KSold outHistory
  2. LMTLockheed Martin Corp
    −$231.5KSold outHistory
  3. iShares S&P 500 Growth ETF464287309
    −$212.6KReduced
  4. BMYBristol Myers Squibb Co
    −$206.4KSold outHistory
  5. BRK.BBerkshire Hathaway Inc
    −$100.1KReducedHistory

Largest weight decreases

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

  1. XOMExxonMobil Holdings Corp
    −0.06 pp0.1% → 0.0%History
  2. LMTLockheed Martin Corp
    −0.05 pp0.1% → 0.0%History
  3. BMYBristol Myers Squibb Co
    −0.05 pp<0.1% → 0.0%History
  4. BRK.BBerkshire Hathaway Inc
    −0.03 pp0.1% → 0.1%History
  5. iShares S&P 500 Value ETF464287408
    −0.01 pp0.3% → 0.3%

Metrics

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

Portfolio value
$480.6M
+$43.9M (+10.0%) vs. prior quarter
Positions
45
+1 vs. prior quarter
Top 10 concentration
90.7%
Top 10 as share of value
Turnover
0.2%
Q2 2026, one quarter
Average holding period
8.4 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 2024), so positions held before then are understated.

13F filings by quarter

10 quarters, going back to Q1 2024. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $480.6M (Q2 2026)

Q1 2024: $131.3MQ2 2024: $304.6MQ3 2024: $326.8MQ4 2024: $334.8MQ1 2025: $347.1MQ2 2025: $398.2MQ3 2025: $398.3MQ4 2025: $439.8MQ1 2026: $436.7MQ2 2026: $480.6M
Q1 2024Q2 2026
13F filings of Mason & Associates, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Jul 14, 202645$480.6MVanguard Morningstar Large-Cap ETFiShares TrPIMCO ETF Trvs. Q1 2026SEC
Q1 2026Apr 22, 202644$436.7MiShares TrVanguard Morningstar Large-Cap ETFPIMCO ETF Trvs. Q4 2025SEC
Q4 2025Jan 21, 202639$439.8MVanguard Morningstar Large-Cap ETFiShares TrPIMCO ETF Trvs. Q3 2025SEC
Q3 2025Nov 4, 202541$398.3MVanguard Morningstar Large-Cap ETFiShares TrVanguard Morningstar Mid-Cap ETFvs. Q2 2025SEC
Q2 2025Jul 30, 202541$398.2MVanguard Morningstar Large-Cap ETFiShares TrVanguard Morningstar Mid-Cap ETFvs. Q1 2025SEC
Q1 2025Apr 11, 202539$347.1MiShares TrVanguard Morningstar Large-Cap ETFVanguard Morningstar Mid-Cap ETFvs. Q4 2024SEC
Q4 2024Jan 15, 202539$334.8MVanguard Morningstar Large-Cap ETFiShares TrVanguard Morningstar Mid-Cap ETFvs. Q3 2024SEC
Q3 2024Oct 15, 202437$326.8MiShares TrVanguard Morningstar Large-Cap ETFVanguard Morningstar Mid-Cap ETFvs. Q2 2024SEC
Q2 2024Jul 16, 202436$304.6MiShares TrVanguard Morningstar Large-Cap ETFVanguard Morningstar Mid-Cap ETFvs. Q1 2024SEC
Q1 2024Apr 26, 202480$131.3MSPYIRMInvesco QQQ Trust Series I–SEC