J.M. Arbour, LLC
- SEC CIK
- 0002099154
- Latest filing
- Aug 14, 2026
The latest 13F from J.M. Arbour, LLC covers Q2 2026 (filed Aug 14, 2026): 132 long positions worth $116.0M. The top 10 holdings make up 31.4% of the portfolio, and the largest is iShares Tr at 6.9%. Livermore has 3 filings on Form 13F from this institution, going back to Q4 2025.
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.
- New
- 24
- Est. +$14.4M
- Added
- 72
- Est. +$11.8M
- Reduced
- 35
- Est. −$9.83M
- Sold out
- 11
- Est. −$13.5M
Top 5 holdings
Share of this quarter's portfolio value
- iShares Tr46434V6136.9%$8.02M
- iShares Core S&P 500 ETF4642872006.8%$7.95M
- iShares S&P 500 Growth ETF4642873093.0%$3.45M
- BlackRock ETF Trust09290C1032.9%$3.36M
- iShares S&P 500 Value ETF4642874082.7%$3.11M
Share of portfolio
Top 5 holdings and the other 127 positions, by share of portfolio value
- iShares Tr6.9%
- iShares Core S&P 500 ETF6.8%
- iShares S&P 500 Growth ETF3.0%
- BlackRock ETF Trust2.9%
- iShares S&P 500 Value ETF2.7%
- Other 127 positions77.7%
Biggest buys
New and added positions, by estimated amount bought
- iShares Core S&P 500 ETF464287200+$3.12MAdded
- iShares Tr46434V613+$2.01MAdded
- Horizon FDS44053A549+$1.76MNew
- BlackRock ETF Trust09290C665+$1.36MNew
- BlackRock ETF Trust II092528835+$1.28MNew
Largest weight increases
New and added positions, by percentage points of the portfolio gained
- iShares Core S&P 500 ETF464287200+2.81 pp4.0% → 6.8%
- Horizon FDS44053A549+1.51 pp0.0% → 1.5%
- BlackRock ETF Trust09290C665+1.17 pp0.0% → 1.2%
- iShares Tr46434V613+1.14 pp5.8% → 6.9%
- BlackRock ETF Trust II092528835+1.10 pp0.0% → 1.1%
Biggest sells
Reduced and sold-out positions, by estimated amount sold
- Two RDS Shared Tr90214Q766−$2.81MSold out
- Two RDS Shared Tr90214Q733−$1.95MSold out
- iShares MSCI USA Quality Factor ETF46432F339−$1.68MReduced
- Two RDS Shared Tr90214Q642−$1.61MSold out
- XOMExxonMobil Holdings Corp
Largest weight decreases
Reduced and sold-out positions, by percentage points of the portfolio lost
- Two RDS Shared Tr90214Q766−2.69 pp2.7% → 0.0%
- Two RDS Shared Tr90214Q733−1.88 pp1.9% → 0.0%
- Two RDS Shared Tr90214Q642−1.55 pp1.5% → 0.0%
- iShares MSCI USA Quality Factor ETF46432F339−1.40 pp1.6% → 0.2%
- XOMExxonMobil Holdings Corp
Metrics
13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.
- Portfolio value
- $116.0M
- +$11.9M (+11.4%) vs. prior quarter
- Positions
- 132
- +13 vs. prior quarter
- Top 10 concentration
- 31.4%
- Top 10 as share of value
- Turnover
- 21.2%
- Q2 2026, one quarter
- Average holding period
- 2.6 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 2025), so positions held before then are understated.
13F filings by quarter
3 quarters, going back to Q4 2025. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.
Peak $116.0M (Q2 2026)
| Quarter | Filed | Positions | Value | Top 3 holdings | Changes | Filing |
|---|---|---|---|---|---|---|
| Q2 2026 | Aug 14, 2026 | 132 | $116.0M | iShares TriShares Core S&P 500 ETFiShares S&P 500 Growth ETF | vs. Q1 2026 | SEC |
| Q1 2026 | Apr 21, 2026 | 119 | $104.2M | iShares TriShares Core S&P 500 ETFiShares S&P 500 Value ETF | vs. Q4 2025 | SEC |
| Q4 2025 | Jan 26, 2026 | 112 | $100.2M | iShares TriShares S&P 500 Value ETFBlackRock ETF Trust | – | SEC |