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Livermore
Livermore
ZHEN

Dumac, Inc.

SEC CIK
0001584258
Latest filing
Aug 11, 2026

The latest 13F from Dumac, Inc. covers Q2 2026 (filed Aug 11, 2026): 16 long positions worth $1.10B. The top 10 holdings make up 99.5% of the portfolio, and the largest is Vanguard S&P 500 ETF at 76.4%. Livermore has 21 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
7
Est. +$51.7M
Added
2
Est. +$118.1M
Reduced
1
Est. −$709.6K
Sold out
1
Est. −$2.44M

Top 5 holdings

Share of this quarter's portfolio value

  1. Vanguard S&P 500 ETF922908363
    76.4%$840.3M
  2. Schwab U.S. REIT ETF808524847
    17.1%$187.8M
  3. NVDANVIDIA Corp
    1.1%$11.8MHistory
  4. GOOGLAlphabet Inc.
    1.0%$11.4MHistory
  5. iShares MSCI India ETF46429B598
    0.9%$9.98M

Biggest buys

New and added positions, by estimated amount bought

  1. Vanguard S&P 500 ETF922908363
    +$114.6MAdded
  2. NVDANVIDIA Corp
    +$11.8MNewHistory
  3. GOOGLAlphabet Inc.
    +$11.4MNewHistory
  4. MSFTMicrosoft Corp
    +$9.59MNewHistory
  5. AMZNAmazon Com Inc
    +$9.22MNewHistory

Largest weight increases

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

  1. NVDANVIDIA Corp
    +1.07 pp0.0% → 1.1%History
  2. GOOGLAlphabet Inc.
    +1.04 pp0.0% → 1.0%History
  3. MSFTMicrosoft Corp
    +0.87 pp0.0% → 0.9%History
  4. AMZNAmazon Com Inc
    +0.84 pp0.0% → 0.8%History
  5. METAMeta Platforms, Inc.
    +0.62 pp0.0% → 0.6%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. ZTOZTO Express (Cayman) Inc.
    −$2.44MSold outHistory
  2. MMYTMakeMyTrip Ltd
    −$709.6KReducedHistory

Largest weight decreases

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

  1. ZTOZTO Express (Cayman) Inc.
    −0.30 pp0.3% → 0.0%History
  2. MMYTMakeMyTrip Ltd
    −0.05 pp0.2% → 0.1%History

Metrics

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

Portfolio value
$1.10B
+$280.1M (+34.1%) vs. prior quarter
Positions
16
+6 vs. prior quarter
Top 10 concentration
99.5%
Top 10 as share of value
Turnover
0.3%
Q2 2026, one quarter
Average holding period
2.9 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

21 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $1.10B (Q2 2026)

Q1 2021: $72.3MQ2 2021: $88.8MQ3 2021: $58.3MQ4 2021: $31.3MQ1 2022: $40.9MQ2 2022: $27.9MQ3 2022: $17.7MQ4 2022: $16.1MQ1 2023: $28.8MQ2 2023: $30.5MQ3 2023: $37.3MQ4 2023: $32.4MQ1 2024: $27.6MQ2 2024: $31.3MQ3 2024: $30.8MQ4 2024: $64.8MQ1 2025: $25.1MQ2 2025: $15.9MQ4 2025: $651.0MQ1 2026: $820.4MQ2 2026: $1.10B
Q1 2021Q2 2026
13F filings of Dumac, Inc. by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 11, 202616$1.10BVanguard S&P 500 ETFSchwab U.S. REIT ETFNVDAvs. Q1 2026SEC
Q1 2026May 1, 202610$820.4MVanguard S&P 500 ETFSchwab U.S. REIT ETFiShares MSCI India ETFvs. Q4 2025SEC
Q4 2025Feb 10, 202610$651.0MVanguard S&P 500 ETFSchwab U.S. REIT ETFiShares MSCI India ETF–SEC
Q2 2025Aug 4, 20257$15.9MiShares MSCI India ETFMMYTKSPIvs. Q1 2025SEC
Q1 2025May 15, 20259$25.1MiShares MSCI India ETFDespegar Com CorpRBRKvs. Q4 2024SEC
Q4 2024Feb 14, 202510$64.8MUTIiShares MSCI India ETFDespegar Com Corpvs. Q3 2024SEC
Q3 2024Nov 14, 202410$30.8MRigel Resource Acq CorpiShares MSCI India ETFMMYTvs. Q2 2024SEC
Q2 2024Aug 14, 202411$31.3MRigel Resource Acq CorpiShares MSCI India ETFMMYTvs. Q1 2024SEC
Q1 2024May 15, 202411$27.6MRigel Resource Acq CorpCMRCKSPIvs. Q4 2023SEC
Q4 2023Feb 14, 202415$32.4MRigel Resource Acq CorpLNZACMRCvs. Q3 2023SEC
Q3 2023Nov 14, 202318$37.3MRigel Resource Acq CorpOSCRCMRCvs. Q2 2023SEC
Q2 2023Aug 14, 202313$30.5MCMRCOverseas Shipholding Group IncOSCRvs. Q1 2023SEC
Q1 2023May 15, 202313$28.8MCMRCOverseas Shipholding Group IncOSCRvs. Q4 2022SEC
Q4 2022Feb 14, 202312$16.1MOverseas Shipholding Group IncOSCRBABAvs. Q3 2022SEC
Q3 2022Nov 14, 202214$17.7MOverseas Shipholding Group IncOSCRBABAvs. Q2 2022SEC
Q2 2022Aug 15, 202217$27.9MRigel Resource Acq CorpOverseas Shipholding Group IncOSCRvs. Q1 2022SEC
Q1 2022May 16, 202221$40.9MRigel Resource Acq CorpOSCROverseas Shipholding Group Incvs. Q4 2021SEC
Q4 2021Feb 14, 202227$31.3MCFLTOverseas Shipholding Group IncSUMOvs. Q3 2021SEC
Q3 2021Nov 15, 202127$58.3MTBRGCMRCOverseas Shipholding Group Incvs. Q2 2021SEC
Q2 2021Aug 16, 202130$88.8MTBRGRBLXXPEVvs. Q1 2021SEC
Q1 2021May 17, 202130$72.3MTBRGUOverseas Shipholding Group Inc–SEC

13D and 13G filings

Companies where Dumac, Inc. reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

Dumac, Inc. does not currently report owning 5% or more of any company.

Latest filings

2 filings on file made by Dumac, Inc. or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Dumac, Inc.
CompanyFiled (ET)FormStakeChangeEvent dateFiling
Rigel Resource Acquisition Corp.Class A Ordinary Shares, par value $0.0001 per shareJan 5, 20261:06 PM ET13G/A0.00%0 shares–Below 5%Dec 31, 2025SEC
Rigel Resource Acquisition Corp.Nov 13, 202413GOld format–New–SEC