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Livermore
Livermore
ZHEN

Rosenberg Matthew Hamilton

SEC CIK
0001812103
Latest filing
Jul 17, 2026

The latest 13F from Rosenberg Matthew Hamilton covers Q2 2026 (filed Jul 17, 2026): 792 long positions worth $536.8M. The top 10 holdings make up 57.5% of the portfolio, and the largest is SPDR Series Trust at 14.5%. 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
21
Est. +$3.32M
Added
182
Est. +$22.2M
Reduced
112
Est. −$11.0M
Sold out
28
Est. −$3.17M

Top 5 holdings

Share of this quarter's portfolio value

  1. SPDR Series Trust78464A805
    14.5%$78.0M
  2. Vanguard Morningstar Total Stock Market ETF922908769
    9.7%$51.8M
  3. Vanguard Intermediate-Term Corporate Bond ETF92206C870
    8.1%$43.3M
  4. JPMorgan Ultra-Short Income ETF46641Q837
    6.4%$34.5M
  5. Schwab International Equity ETF808524805
    5.1%$27.3M

Biggest buys

New and added positions, by estimated amount bought

  1. Vanguard Intermediate-Term Corporate Bond ETF92206C870
    +$4.06MAdded
  2. SPDR Series Trust78464A805
    +$3.00MAdded
  3. XOMExxonMobil Holdings Corp
    +$1.84MNewHistory
  4. Schwab International Equity ETF808524805
    +$1.72MAdded
  5. Goldman Sachs ETF Tr381430438
    +$1.45MAdded

Largest weight increases

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

  1. SPDR Series Trust78464A805
    +1.15 pp13.4% → 14.5%
  2. Schwab International Equity ETF808524805
    +0.40 pp4.7% → 5.1%
  3. XOMExxonMobil Holdings Corp
    +0.34 pp0.0% → 0.3%History
  4. Goldman Sachs ETF Tr381430438
    +0.27 pp<0.1% → 0.3%
  5. iShares Core MSCI Emerging Markets ETF46434G103
    +0.22 pp1.1% → 1.3%

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. Vanguard Intermediate-Term Bond ETF921937819
    −$2.52MReduced
  2. XOMExxonMobil Holdings Corp
    −$2.21MSold outHistory
  3. State Street SPDR Bloomberg 1-3 Month T-Bill ETF78468R663
    −$1.92MReduced
  4. JPMorgan Ultra-Short Income ETF46641Q837
    −$1.81MReduced
  5. iShares Tr464288158
    −$857.1KReduced

Largest weight decreases

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

  1. Vanguard Intermediate-Term Bond ETF921937819
    −1.03 pp5.9% → 4.8%
  2. JPMorgan Ultra-Short Income ETF46641Q837
    −1.02 pp7.4% → 6.4%
  3. XOMExxonMobil Holdings Corp
    −0.45 pp0.5% → 0.0%History
  4. State Street SPDR Bloomberg 1-3 Month T-Bill ETF78468R663
    −0.42 pp0.7% → 0.3%
  5. J P Morgan Exchange Traded F46641Q654
    −0.32 pp2.8% → 2.5%

Metrics

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

Portfolio value
$536.8M
+$48.7M (+10.0%) vs. prior quarter
Positions
792
−7 vs. prior quarter
Top 10 concentration
57.5%
Top 10 as share of value
Turnover
2.8%
Q2 2026, one quarter
Average holding period
20.8 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 $536.8M (Q2 2026)

Q1 2021: $175.3MQ2 2021: $192.1MQ3 2021: $253.2MQ4 2021: $280.9MQ1 2022: $285.9MQ2 2022: $265.2MQ3 2022: $258.6MQ4 2022: $295.2MQ1 2023: $310.0MQ2 2023: $295.8MQ3 2023: $300.2MQ4 2023: $325.1MQ1 2024: $346.1MQ2 2024: $338.6MQ3 2024: $382.2MQ4 2024: $384.8MQ1 2025: $398.8MQ2 2025: $430.0MQ3 2025: $462.6MQ4 2025: $482.8MQ1 2026: $488.0MQ2 2026: $536.8M
Q1 2021Q2 2026
13F filings of Rosenberg Matthew Hamilton by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Jul 17, 2026792$536.8MSPDR Series TrustVanguard Morningstar Total Stock Market ETFVanguard Intermediate-Term Corporate Bond ETFvs. Q1 2026SEC
Q1 2026Apr 7, 2026799$488.0MSPDR Series TrustVanguard Morningstar Total Stock Market ETFVanguard Intermediate-Term Corporate Bond ETFvs. Q4 2025SEC
Q4 2025Jan 5, 2026803$482.8MSPDR Series TrustVanguard Morningstar Total Stock Market ETFVanguard Intermediate-Term Corporate Bond ETFvs. Q3 2025SEC
Q3 2025Nov 10, 2025803$462.6MSPDR Series TrustVanguard Morningstar Total Stock Market ETFJPMorgan Ultra-Short Income ETFvs. Q2 2025SEC
Q2 2025Jul 28, 2025832$430.0MSPDR Series TrustVanguard Morningstar Total Stock Market ETFJPMorgan Ultra-Short Income ETFvs. Q1 2025SEC
Q1 2025Apr 28, 2025818$398.8MSPDR Series TrustVanguard Morningstar Total Stock Market ETFJPMorgan Ultra-Short Income ETFvs. Q4 2024SEC
Q4 2024Jan 14, 2025798$384.8MSPDR Series TrustVanguard Morningstar Total Stock Market ETFJPMorgan Ultra-Short Income ETFvs. Q3 2024SEC
Q3 2024Oct 28, 2024834$382.2MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q2 2024SEC
Q2 2024Jul 26, 2024807$338.6MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q1 2024SEC
Q1 2024Apr 22, 2024849$346.1MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q4 2023SEC
Q4 2023Jan 16, 2024921$325.1MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q3 2023SEC
Q3 2023Oct 11, 2023937$300.2MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q2 2023SEC
Q2 2023Jul 26, 2023959$295.8MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q1 2023SEC
Q1 2023Apr 17, 2023938$310.0MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q4 2022SEC
Q4 2022Jan 19, 2023932$295.2MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q3 2022SEC
Q3 2022Oct 21, 2022853$258.6MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q2 2022SEC
Q2 2022Jul 15, 2022790$265.2MVanguard Morningstar Total Stock Market ETFSPDR Series TrustiShares U S ETF Trvs. Q1 2022SEC
Q1 2022Apr 14, 2022745$285.9MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q4 2021SEC
Q4 2021Jan 20, 2022720$280.9MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q3 2021SEC
Q3 2021Oct 12, 2021687$253.2MVanguard Morningstar Total Stock Market ETFSPDR Series TrustiShares U S ETF Trvs. Q2 2021SEC
Q2 2021Jul 26, 2021582$192.1MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETFvs. Q1 2021SEC
Q1 2021Apr 30, 2021556$175.3MVanguard Morningstar Total Stock Market ETFSPDR Series TrustJPMorgan Ultra-Short Income ETF–SEC