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Livermore
Livermore
ZHEN

One Charles Private Wealth Services, LLC

SEC CIK
0001800938
Latest filing
Jul 15, 2026

The latest 13F from One Charles Private Wealth Services, LLC covers Q2 2026 (filed Jul 15, 2026): 175 long positions worth $433.9M. The top 10 holdings make up 49.6% of the portfolio, and the largest is Berkshire Hathaway Inc (BRK.B) at 10.7%. Livermore has 23 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
22
Est. +$16.0M
Added
54
Est. +$4.89M
Reduced
79
Est. −$16.7M
Sold out
5
Est. −$1.59M

Top 5 holdings

Share of this quarter's portfolio value

  1. BRK.BBerkshire Hathaway Inc
    10.7%$46.5MHistory
  2. TPLTexas Pacific Land Corp
    7.1%$30.9MHistory
  3. Listed FDS Tr53656F623
    5.6%$24.2M
  4. Vanguard Morningstar Value ETF922908744
    5.2%$22.7M
  5. Vanguard Morningstar Growth ETF922908736
    4.4%$19.0M

Biggest buys

New and added positions, by estimated amount bought

  1. Ea Series Trust02072L607
    +$6.03MNew
  2. MIAXMiami International Holdings, Inc.
    +$4.40MNewHistory
  3. iShares Core MSCI Eafe ETF46432F842
    +$1.05MAdded
  4. Vanguard Morningstar Value ETF922908744
    +$979.2KAdded
  5. Vanguard Morningstar Growth ETF922908736
    +$690.8KAddedConverted for a 6-for-1 split

Largest weight increases

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

  1. Ea Series Trust02072L607
    +1.39 pp0.0% → 1.4%
  2. MIAXMiami International Holdings, Inc.
    +1.01 pp0.0% → 1.0%History
  3. Vanguard Morningstar Growth ETF922908736
    +0.50 pp3.9% → 4.4%
  4. Advisors Inner Circle FD III00775Y645
    +0.44 pp3.0% → 3.4%
  5. Vanguard Information Technology ETF92204A702
    +0.38 pp1.4% → 1.8%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. iShares Core MSCI Emerging Markets ETF46434G103
    −$4.32MReduced
  2. TPLTexas Pacific Land Corp
    −$2.13MReducedHistory
  3. BRK.BBerkshire Hathaway Inc
    −$1.95MReducedHistory
  4. LBLandBridge Co LLC
    −$920.2KReducedHistory
  5. GBTCGrayscale Bitcoin Trust ETF
    −$784.9KReducedHistory

Largest weight decreases

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

  1. TPLTexas Pacific Land Corp
    −1.85 pp9.0% → 7.1%History
  2. GBTCGrayscale Bitcoin Trust ETF
    −0.94 pp3.7% → 2.7%History
  3. BRK.BBerkshire Hathaway Inc
    −0.91 pp11.6% → 10.7%History
  4. iShares Core MSCI Emerging Markets ETF46434G103
    −0.90 pp1.0% → 0.1%
  5. Listed FDS Tr53656F623
    −0.90 pp6.5% → 5.6%

Metrics

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

Portfolio value
$433.9M
+$34.7M (+8.7%) vs. prior quarter
Positions
175
+17 vs. prior quarter
Top 10 concentration
49.6%
Top 10 as share of value
Turnover
4.4%
Q2 2026, one quarter
Average holding period
15.5 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 (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 $433.9M (Q2 2026)

Q1 2021: $20.9MQ2 2021: $149.0MQ3 2021: $173.4MQ4 2021: $173.2MQ1 2022: $160.7MQ2 2022: $148.0MQ3 2022: $150.5MQ4 2022: $154.5MQ1 2023: $161.0MQ2 2023: $172.1MQ3 2023: $171.0MQ4 2023: $188.9MQ1 2024: $229.7MQ2 2024: $240.3MQ3 2024: $263.0MQ4 2024: $297.4MQ1 2025: $308.9MQ2 2025: $356.0MQ3 2025: $380.7MQ4 2025: $386.8MQ1 2026: $399.2MQ2 2026: $433.9M
Q1 2021Q2 2026
13F filings of One Charles Private Wealth Services, LLC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Jul 15, 2026175$433.9MBRK.BTPLListed FDS Trvs. Q1 2026SEC
Q1 2026May 7, 2026158$399.2MBRK.BTPLListed FDS Trvs. Q4 2025SEC
Q4 2025Feb 6, 2026170$386.8MBRK.BListed FDS TrTPLvs. Q3 2025SEC
Q3 2025Nov 12, 2025167$380.7MBRK.BGBTCTPLvs. Q2 2025SEC
Q2 2025Aug 12, 2025163$356.0MBRK.BTPLGBTCvs. Q1 2025SEC
Q1 2025May 8, 2025145$308.9MBRK.BTPLListed FDS Trvs. Q4 2024SEC
Q4 2024Feb 11, 2025154$297.4MBRK.BTPLGBTCvs. Q3 2024SEC
Q3 2024Nov 12, 2024153$263.0MBRK.BACVATPLvs. Q2 2024SEC
Q2 2024Aug 14, 2024148$240.3MBRK.BACVATPLvs. Q1 2024SEC
Q1 2024May 14, 2024144$229.7MBRK.BACVAGBTCvs. Q4 2023SEC
Q4 2023Feb 13, 2024Amended138$188.9MACVABRK.BListed FDS Trvs. Q3 2023SEC
Q3 2023Nov 13, 2023125$171.0MACVABRK.BTPLvs. Q2 2023SEC
Q2 2023Aug 8, 2023124$172.1MACVABRK.BListed FDS Trvs. Q1 2023SEC
Q1 2023May 4, 2023118$161.0MACVAListed FDS TrTPLvs. Q4 2022SEC
Q4 2022Feb 6, 2023114$154.5MTPLACVAListed FDS Trvs. Q3 2022SEC
Q3 2022Nov 9, 2022115$150.5MACVAListed FDS TrTPLvs. Q2 2022SEC
Q2 2022Aug 8, 2022116$148.0MListed FDS TrETF Ser SolutionsBRK.Bvs. Q1 2022SEC
Q1 2022May 2, 2022112$160.7MACVAListed FDS TrETF Ser Solutionsvs. Q4 2021SEC
Q4 2021Jan 27, 2022115$173.2MACVAETF Ser SolutionsARK Innovation ETFvs. Q3 2021SEC
Q3 2021Nov 3, 2021120$173.4MACVAARK Innovation ETFETF Ser Solutionsvs. Q2 2021SEC
Q2 2021Aug 10, 2021107$149.0MARK Innovation ETFACVAETF Ser Solutionsvs. Q1 2021SEC
Q1 2021Apr 27, 202133$20.9MARK Innovation ETFETF Ser SolutionsListed FDS Tr–SEC