Main Street Research LLC ETF holdings
Sausalito, CA
Reported $272.4M in 25 ETFs in its Form 13F for June 30, 2026.
ETF value
$272.4M
ETFs held
25
Change from prior quarter
+1.4%
With price moves
ETFs as a share of its 13F
12.9%
of $2.1B
Top 10 of 25 ETF holdings
| Ticker | Fund | Value | Shares | Change |
|---|---|---|---|---|
| XBI | State Street SPDR S&P Biotech ETF | $91.3M | 576,754 | +9,275 shares |
| ISCF | iShares International Small-Cap Equity Factor ETF | $87.8M | 2,027,356 | +68,729 shares |
| EWY | iShares MSCI South Korea ETF | $72.9M | 360,865 | −1,009 shares |
| IXUS | iShares Core MSCI Total International Stock ETF | $3.7M | 39,073 | +490 shares |
| URTH | iShares MSCI World ETF | $2.7M | 13,511 | −1,231 shares |
| SPY | State Street SPDR S&P 500 ETF Trust | $2.6M | 3,485 | +222 shares |
| IVV | iShares Core S&P 500 ETF | $1.4M | 1,810 | −744 shares |
| ISTB | iShares Core 1-5 Year USD Bond ETF | $1.2M | 24,592 | +534 shares |
| QQQ | Invesco QQQ Trust | $1.1M | 1,531 | −238 shares |
| SCHI | Schwab 5-10 Year Corporate Bond ETF | $1.1M | 46,488 | +2,162 shares |
15 more ETF positions
The full list comes with the Advisors and Institutions package.
Sign up to see them allFrom SEC Form 13F. Change compares June 30, 2026 with March 31, 2026. SEC filer ID (CIK) 0001513211. Filings on SEC EDGAR.
Frequently asked questions
What ETFs does Main Street Research LLC own?
Main Street Research LLC reported 25 ETF positions worth $272.4M in its Form 13F for June 30, 2026. The largest was XBI, at $91.3M.
Where does this data come from?
From the firm's own quarterly Form 13F filing with the SEC. It shows long positions at quarter end and can include holdings run for clients, so it isn't necessarily the firm's own money.
How current is it?
13F filings are due 45 days after each quarter ends. The next set is due around mid-November.