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Livermore
Livermore
ZHEN

Mayport, LLC

SEC CIK
0001922875
Latest filing
Aug 7, 2026

The latest 13F from Mayport, LLC covers Q2 2026 (filed Aug 7, 2026): 134 long positions worth $644.8M. The top 10 holdings make up 71.2% of the portfolio, and the largest is Vanguard S&P 500 ETF at 23.3%. Livermore has 19 filings on Form 13F from this institution, going back to Q4 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
12
Est. +$4.26M
Added
52
Est. +$47.5M
Reduced
31
Est. −$1.94M
Sold out
8
Est. −$2.06M

Top 5 holdings

Share of this quarter's portfolio value

  1. Vanguard S&P 500 ETF922908363
    23.3%$150.0M
  2. Vanguard Scottsdale FDS92206C102
    11.6%$74.6M
  3. Vanguard Ftse Developed Markets ETF921943858
    8.0%$51.4M
  4. Vanguard Index FDS922908652
    7.3%$47.4M
  5. Vanguard Morningstar Total Stock Market ETF922908769
    6.2%$40.2M

Biggest buys

New and added positions, by estimated amount bought

  1. SPYSPDR S&P 500 ETF Trust
    +$10.9MAddedHistory
  2. Vanguard S&P 500 ETF922908363
    +$6.59MAdded
  3. Vanguard Morningstar Total Stock Market ETF922908769
    +$5.25MAdded
  4. Vanguard Scottsdale FDS92206C102
    +$4.42MAdded
  5. Vanguard Ftse Developed Markets ETF921943858
    +$4.23MAdded

Largest weight increases

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

  1. SPYSPDR S&P 500 ETF Trust
    +1.65 pp0.7% → 2.4%History
  2. Vanguard Morningstar Total Stock Market ETF922908769
    +0.60 pp5.6% → 6.2%
  3. Ea Series Trust02072L607
    +0.46 pp3.0% → 3.5%
  4. Vanguard Index FDS922908652
    +0.35 pp7.0% → 7.3%
  5. Vanguard Morningstar Growth ETF922908736
    +0.33 pp0.1% → 0.5%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. BRK.ABerkshire Hathaway Inc
    −$718.1KSold outHistory
  2. TRNOTerreno Realty Corp
    −$599.0KReducedHistory
  3. LMTLockheed Martin Corp
    −$292.5KSold outHistory
  4. HONHoneywell International Inc
    −$236.6KSold outHistory
  5. BABoeing Co
    −$211.7KReducedHistory

Largest weight decreases

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

  1. METAMeta Platforms, Inc.
    −0.17 pp1.0% → 0.8%History
  2. BRK.ABerkshire Hathaway Inc
    −0.13 pp0.1% → 0.0%History
  3. TRNOTerreno Realty Corp
    −0.13 pp0.3% → 0.2%History
  4. Vanguard Morningstar Large-Cap ETF922908637
    −0.08 pp1.7% → 1.6%
  5. LMTLockheed Martin Corp
    −0.05 pp0.1% → 0.0%History

Metrics

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

Portfolio value
$644.8M
+$106.9M (+19.9%) vs. prior quarter
Positions
134
+4 vs. prior quarter
Top 10 concentration
71.2%
Top 10 as share of value
Turnover
0.7%
Q2 2026, one quarter
Average holding period
17.5 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 (Q4 2021), so positions held before then are understated.

13F filings by quarter

19 quarters, going back to Q4 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $644.8M (Q2 2026)

Q4 2021: $134.4MQ1 2022: $144.7MQ2 2022: $121.7MQ3 2022: $122.9MQ4 2022: $133.9MQ1 2023: $159.9MQ2 2023: $176.7MQ3 2023: $181.8MQ4 2023: $220.0MQ1 2024: $261.9MQ2 2024: $280.8MQ3 2024: $312.0MQ4 2024: $339.4MQ1 2025: $362.7MQ2 2025: $416.6MQ3 2025: $461.6MQ4 2025: $496.4MQ1 2026: $538.0MQ2 2026: $644.8M
Q4 2021Q2 2026
13F filings of Mayport, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 7, 2026134$644.8MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Ftse Developed Markets ETFvs. Q1 2026SEC
Q1 2026Apr 21, 2026130$538.0MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Ftse Developed Markets ETFvs. Q4 2025SEC
Q4 2025Jan 21, 2026112$496.4MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q3 2025SEC
Q3 2025Nov 20, 2025109$461.6MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q2 2025SEC
Q2 2025Aug 7, 202598$416.6MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q1 2025SEC
Q1 2025Apr 22, 202590$362.7MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Ftse Developed Markets ETFvs. Q4 2024SEC
Q4 2024Feb 6, 202584$339.4MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q3 2024SEC
Q3 2024Oct 16, 202480$312.0MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q2 2024SEC
Q2 2024Jul 18, 202480$280.8MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q1 2024SEC
Q1 2024Apr 22, 202483$261.9MVanguard S&P 500 ETFVanguard Index FDSVanguard Scottsdale FDSvs. Q4 2023SEC
Q4 2023Jan 29, 202478$220.0MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q3 2023SEC
Q3 2023Oct 12, 202366$181.8MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Ftse Developed Markets ETFvs. Q2 2023SEC
Q2 2023Jul 18, 202368$176.7MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Ftse Developed Markets ETFvs. Q1 2023SEC
Q1 2023May 2, 202366$159.9MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Ftse Developed Markets ETFvs. Q4 2022SEC
Q4 2022Jan 18, 202356$133.9MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Ftse Developed Markets ETFvs. Q3 2022SEC
Q3 2022Oct 17, 202254$122.9MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q2 2022SEC
Q2 2022Jul 15, 202251$121.7MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Ftse Developed Markets ETFvs. Q1 2022SEC
Q1 2022Apr 15, 202260$144.7MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDSvs. Q4 2021SEC
Q4 2021Apr 15, 202262$134.4MVanguard S&P 500 ETFVanguard Scottsdale FDSVanguard Index FDS–SEC