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Livermore
Livermore
ZHEN

Austin Asset Management Co Inc

SEC CIK
0001902024
Latest filing
Jul 31, 2026

The latest 13F from Austin Asset Management Co Inc covers Q2 2026 (filed Jul 31, 2026): 94 long positions worth $717.5M. The top 10 holdings make up 77.2% of the portfolio, and the largest is Dimensional U.S. Core Equity 2 ETF at 24.8%. 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
13
Est. +$3.34M
Added
28
Est. +$39.3M
Reduced
25
Est. −$6.63M
Sold out
4
Est. −$2.33M

Top 5 holdings

Share of this quarter's portfolio value

  1. Dimensional U.S. Core Equity 2 ETF25434V708
    24.8%$177.8M
  2. NVDANVIDIA Corp
    17.2%$123.4MHistory
  3. Dimensional ETF Trust25434V401
    10.7%$77.1M
  4. Dimensional U.S. Small Cap ETF25434V500
    5.1%$36.9M
  5. iShares Tr46429B747
    5.1%$36.5M

Share of portfolio

Top 5 holdings and the other 89 positions, by share of portfolio value

  1. Dimensional U.S. Core Equity 2 ETF24.8%
  2. NVDA17.2%
  3. Dimensional ETF Trust10.7%
  4. Dimensional U.S. Small Cap ETF5.1%
  5. iShares Tr5.1%
  6. Other 89 positions37.1%

Biggest buys

New and added positions, by estimated amount bought

  1. NVDANVIDIA Corp
    +$24.5MAddedHistory
  2. iShares Tr46429B747
    +$4.74MAdded
  3. Vanguard Intermediate-Term Bond ETF921937819
    +$3.86MAdded
  4. AMZNAmazon Com Inc
    +$1.17MAddedHistory
  5. GOOGAlphabet Inc.
    +$1.08MAddedHistory

Largest weight increases

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

  1. NVDANVIDIA Corp
    +3.03 pp14.2% → 17.2%History
  2. DELLDell Technologies Inc.
    +0.62 pp0.5% → 1.1%History
  3. AMZNAmazon Com Inc
    +0.16 pp0.2% → 0.4%History
  4. GOOGAlphabet Inc.
    +0.16 pp0.1% → 0.3%History
  5. AVGOBroadcom Inc.
    +0.07 pp<0.1% → 0.1%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. XOMExxonMobil Holdings Corp
    −$1.66MSold outHistory
  2. Dimensional U.S. Core Equity 2 ETF25434V708
    −$1.50MReduced
  3. Dimensional U.S. Small Cap ETF25434V500
    −$1.23MReduced
  4. AMDAdvanced Micro Devices Inc
    −$755.2KReducedHistory
  5. AESIAtlas Energy Solutions Inc.
    −$664.4KReducedHistory

Largest weight decreases

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

  1. Dimensional U.S. Core Equity 2 ETF25434V708
    −1.04 pp25.8% → 24.8%
  2. Vanguard Short-Term Bond ETF921937827
    −0.30 pp1.4% → 1.1%
  3. Dimensional ETF Trust25434V799
    −0.28 pp2.5% → 2.3%
  4. XOMExxonMobil Holdings Corp
    −0.27 pp0.3% → 0.0%History
  5. Dimensional U.S. Small Cap ETF25434V500
    −0.27 pp5.4% → 5.1%

Metrics

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

Portfolio value
$717.5M
+$109.2M (+18.0%) vs. prior quarter
Positions
94
+9 vs. prior quarter
Top 10 concentration
77.2%
Top 10 as share of value
Turnover
1.4%
Q2 2026, one quarter
Average holding period
16.4 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 (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 $717.5M (Q2 2026)

Q4 2021: $320.4MQ1 2022: $315.0MQ2 2022: $280.3MQ3 2022: $278.1MQ4 2022: $277.7MQ1 2023: $312.3MQ2 2023: $351.7MQ3 2023: $342.7MQ4 2023: $379.6MQ1 2024: $470.7MQ2 2024: $489.0MQ3 2024: $513.6MQ4 2024: $503.0MQ1 2025: $480.1MQ2 2025: $513.4MQ3 2025: $548.4MQ4 2025: $608.7MQ1 2026: $608.3MQ2 2026: $717.5M
Q4 2021Q2 2026
13F filings of Austin Asset Management Co Inc by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Jul 31, 202694$717.5MDimensional U.S. Core Equity 2 ETFNVDADimensional ETF Trustvs. Q1 2026SEC
Q1 2026Apr 29, 202685$608.3MDimensional U.S. Core Equity 2 ETFNVDADimensional ETF Trustvs. Q4 2025SEC
Q4 2025Feb 4, 202676$608.7MDimensional U.S. Core Equity 2 ETFNVDADimensional ETF Trustvs. Q3 2025SEC
Q3 2025Oct 24, 202574$548.4MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustNVDAvs. Q2 2025SEC
Q2 2025Jul 23, 202574$513.4MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustNVDAvs. Q1 2025SEC
Q1 2025Apr 23, 202581$480.1MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustiShares Trvs. Q4 2024SEC
Q4 2024Jan 28, 202571$503.0MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustNVDAvs. Q3 2024SEC
Q3 2024Nov 1, 202467$513.6MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustNVDAvs. Q2 2024SEC
Q2 2024Aug 12, 202466$489.0MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustNVDAvs. Q1 2024SEC
Q1 2024Apr 26, 202464$470.7MDimensional U.S. Core Equity 2 ETFNVDADimensional ETF Trustvs. Q4 2023SEC
Q4 2023Jan 10, 202458$379.6MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustDimensional U.S. Small Cap ETFvs. Q3 2023SEC
Q3 2023Oct 24, 202361$342.7MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustDimensional U.S. Small Cap ETFvs. Q2 2023SEC
Q2 2023Jul 24, 202358$351.7MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustDimensional U.S. Small Cap ETFvs. Q1 2023SEC
Q1 2023Apr 11, 202356$312.3MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustiShares Trvs. Q4 2022SEC
Q4 2022Jan 13, 202353$277.7MDimensional U.S. Core Equity 2 ETFCASHDimensional ETF Trustvs. Q3 2022SEC
Q3 2022Oct 7, 202253$278.1MDimensional U.S. Core Equity 2 ETFCASHDimensional ETF Trustvs. Q2 2022SEC
Q2 2022Jul 11, 202255$280.3MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustCASHvs. Q1 2022SEC
Q1 2022Apr 13, 202257$315.0MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustCASHvs. Q4 2021SEC
Q4 2021Jan 26, 202256$320.4MDimensional U.S. Core Equity 2 ETFDimensional ETF TrustiShares Tr–SEC