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Livermore
Livermore
ZHEN

Rockbridge Investment Management, LCC

SEC CIK
0001821984
Latest filing
Aug 14, 2026

The latest 13F from Rockbridge Investment Management, LCC covers Q2 2026 (filed Aug 14, 2026): 146 long positions worth $1.23B. The top 10 holdings make up 75.5% of the portfolio, and the largest is Schwab US Aggregate Bond ETF at 19.6%. Livermore has 22 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
12
Est. +$3.21M
Added
51
Est. +$42.8M
Reduced
55
Est. −$12.6M
Sold out
3
Est. −$1.27M

Top 5 holdings

Share of this quarter's portfolio value

  1. Schwab US Aggregate Bond ETF808524839
    19.6%$241.0M
  2. Dimensional U.S. Core Equity 2 ETF25434V708
    13.8%$170.4M
  3. Dimensional ETF Trust25434V799
    7.1%$87.6M
  4. SPDR Series Trust78464A805
    6.7%$82.1M
  5. Vanguard Scottsdale FDS92206C409
    6.3%$77.6M

Share of portfolio

Top 5 holdings and the other 141 positions, by share of portfolio value

  1. Schwab US Aggregate Bond ETF19.6%
  2. Dimensional U.S. Core Equity 2 ETF13.8%
  3. Dimensional ETF Trust7.1%
  4. SPDR Series Trust6.7%
  5. Vanguard Scottsdale FDS6.3%
  6. Other 141 positions46.5%

Biggest buys

New and added positions, by estimated amount bought

  1. Schwab US Aggregate Bond ETF808524839
    +$16.8MAdded
  2. Dimensional ETF Trust25434V799
    +$6.06MAdded
  3. Vanguard Total Bond Market ETF921937835
    +$4.35MAdded
  4. State Street SPDR Portfolio S&P 500 ETF78464A854
    +$3.50MAdded
  5. Vanguard Scottsdale FDS92206C409
    +$3.32MAdded

Largest weight increases

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

  1. Dimensional U.S. Core Equity 2 ETF25434V708
    +0.52 pp13.3% → 13.8%
  2. State Street SPDR Portfolio S&P 500 ETF78464A854
    +0.45 pp4.4% → 4.9%
  3. Dimensional ETF Trust25434V732
    +0.33 pp2.9% → 3.3%
  4. iShares Core MSCI Emerging Markets ETF46434G103
    +0.23 pp2.7% → 2.9%
  5. Vanguard Scottsdale FDS92206C664
    +0.17 pp1.0% → 1.2%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. SPDR Series Trust78464A805
    −$2.69MReduced
  2. Schwab U.S. Broad Market ETF808524102
    −$1.25MReduced
  3. iShares Tr464288521
    −$950.1KReduced
  4. State Street SPDR S&P 400 Mid Cap Value ETF78464A839
    −$906.7KReduced
  5. State Street SPDR Portfolio Aggregate Bond ETF78464A649
    −$823.7KReduced

Largest weight decreases

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

  1. State Street SPDR Portfolio Aggregate Bond ETF78464A649
    −0.16 pp0.9% → 0.8%
  2. Schwab International Small-Cap Equity ETF808524888
    −0.12 pp1.3% → 1.2%
  3. State Street SPDR S&P 400 Mid Cap Value ETF78464A839
    −0.07 pp0.5% → 0.5%
  4. Vanguard Short-Term Bond ETF921937827
    −0.07 pp0.3% → 0.3%
  5. Schwab U.S. Broad Market ETF808524102
    −0.07 pp0.8% → 0.7%

Metrics

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

Portfolio value
$1.23B
+$118.6M (+10.7%) vs. prior quarter
Positions
146
+9 vs. prior quarter
Top 10 concentration
75.5%
Top 10 as share of value
Turnover
1.2%
Q2 2026, one quarter
Average holding period
19.8 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 $1.23B (Q2 2026)

Q1 2021: $528.5MQ2 2021: $590.0MQ3 2021: $603.6MQ4 2021: $676.0MQ1 2022: $649.5MQ2 2022: $457.1MQ3 2022: $424.2MQ4 2022: $493.4MQ1 2023: $542.7MQ2 2023: $568.6MQ3 2023: $565.6MQ4 2023: $653.8MQ1 2024: $682.4MQ2 2024: $705.4MQ3 2024: $772.1MQ4 2024: $780.3MQ1 2025: $845.0MQ2 2025: $932.8MQ3 2025: $1.01BQ4 2025: $1.08BQ1 2026: $1.11BQ2 2026: $1.23B
Q1 2021Q2 2026
13F filings of Rockbridge Investment Management, LCC by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 14, 2026146$1.23BSchwab US Aggregate Bond ETFDimensional U.S. Core Equity 2 ETFDimensional ETF Trustvs. Q1 2026SEC
Q1 2026May 14, 2026137$1.11BSchwab US Aggregate Bond ETFDimensional U.S. Core Equity 2 ETFDimensional ETF Trustvs. Q4 2025SEC
Q4 2025Feb 4, 2026135$1.08BSchwab US Aggregate Bond ETFDimensional U.S. Core Equity 2 ETFSPDR Series Trustvs. Q3 2025SEC
Q3 2025Nov 12, 2025133$1.01BSchwab US Aggregate Bond ETFDimensional U.S. Core Equity 2 ETFSPDR Series Trustvs. Q2 2025SEC
Q2 2025Aug 11, 2025133$932.8MSchwab US Aggregate Bond ETFDimensional U.S. Core Equity 2 ETFSPDR Series Trustvs. Q1 2025SEC
Q1 2025May 14, 2025130$845.0MSchwab US Aggregate Bond ETFDimensional U.S. Core Equity 2 ETFSPDR Series Trustvs. Q4 2024SEC
Q4 2024Feb 12, 2025132$780.3MSchwab US Aggregate Bond ETFDimensional U.S. Core Equity 2 ETFSPDR Series Trustvs. Q3 2024SEC
Q3 2024Nov 1, 2024129$772.1MSchwab US Aggregate Bond ETFSPDR Series TrustDimensional U.S. Core Equity 2 ETFvs. Q2 2024SEC
Q2 2024Aug 14, 2024117$705.4MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q1 2024SEC
Q1 2024May 15, 2024118$682.4MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q4 2023SEC
Q4 2023Feb 14, 2024665$653.8MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q3 2023SEC
Q3 2023May 28, 2024106$565.6MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q2 2023SEC
Q2 2023May 28, 2024109$568.6MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q1 2023SEC
Q1 2023May 28, 2024108$542.7MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q4 2022SEC
Q4 2022May 28, 2024107$493.4MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q3 2022SEC
Q3 2022May 28, 2024101$424.2MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q2 2022SEC
Q2 2022May 28, 2024640$457.1MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q1 2022SEC
Q1 2022May 28, 2024799$649.5MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q4 2021SEC
Q4 2021Feb 14, 2022812$676.0MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q3 2021SEC
Q3 2021Nov 12, 2021759$603.6MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q2 2021SEC
Q2 2021Aug 5, 2021743$590.0MSchwab US Aggregate Bond ETFSPDR Series TrustVanguard Total Bond Market ETFvs. Q1 2021SEC
Q1 2021May 20, 2021725$528.5MSchwab US Aggregate Bond ETFVanguard Total Bond Market ETFSPDR Series Trust–SEC