Efficient Frontier Advisors LLC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Reported portfolio value by quarter (7 quarters reported)

$158M $119M

Q4 23 Q2 24 Q4 24 Q2 25

$119M in Q4 2023 → $158M now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2025. Activity is the change in share count since the prior quarter's filing.

Holding	% of portfolio	Activity	Shares	Value
IT Ishares Tr	26.7%	Added 2.7%	417,900	$42.1M
DE Dimensional ETF Trust	20.3%	Trimmed 5.7%	757,534	$32M
DE Dimensional ETF Trust	16.0%	Trimmed 6.8%	466,243	$25.2M
DE Dimensional ETF Trust	15.7%	Trimmed 1.8%	577,942	$24.8M
VI Vanguard Index Fds	6.9%	Added 0.6%	35,647	$10.8M
VE Vaneck ETF Trust	2.9%	Trimmed 12%	88,957	$4.63M
DE Dimensional ETF Trust	2.8%	Added 2.3%	152,343	$4.48M
DE Dimensional ETF Trust	2.2%	Trimmed 9.5%	53,434	$3.4M
AC American Centy ETF Tr	1.9%	Added 0.2%	37,377	$2.96M
DE Dimensional ETF Trust	1.4%	Added 4.9%	67,280	$2.21M
DE Dimensional ETF Trust	0.6%	Unchanged	32,975	$989K
VI Vanguard Index Fds	0.4%	Added 0.2%	1,239	$704K
AC American Centy ETF Tr	0.3%	Unchanged	7,143	$430K
VI Vanguard Intl Equity Index F	0.3%	Added 0.2%	4,988	$410K
IE Invesco Exch Traded Fd Tr Ii	0.2%	Added 0.9%	9,228	$359K
IE Invesco Exchange Traded Fd T	0.2%	Added 0.3%	7,762	$328K
VT Vanguard Tax-managed Fds	0.2%	Added 0.3%	5,616	$320K
AC American Centy ETF Tr	0.2%	Added 1.4%	5,810	$311K
AC American Centy ETF Tr	0.2%	New	3,355	$306K
IE Invesco Exchange Traded Fd T	0.2%	Added 0.4%	6,793	$276K
IE Invesco Exch Traded Fd Tr Ii	0.2%	Added 0.7%	11,492	$269K
VI Vanguard Intl Equity Index F	0.2%	Added 1.5%	3,439	$266K

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 6 quarters.

quarter ended June 30, 2025 · filed July 09, 2025

Company	Action	Shares changed	Value of change	% of portfolio
DE Dimensional ETF Trust	Trimmed	−45,865	−$1.94M	20.3%
DE Dimensional ETF Trust	Trimmed	−33,834	−$1.83M	16.0%
IT Ishares Tr	Added	+11,049	+$1.11M	26.7%
VE Vaneck ETF Trust	Trimmed	−11,885	−$619K	2.9%
DE Dimensional ETF Trust	Trimmed	−10,459	−$448K	15.7%
DE Dimensional ETF Trust	Trimmed	−5,591	−$356K	2.2%
AC American Centy ETF Tr	New	+3,355	+$306K	0.2%
DE Dimensional ETF Trust	Added	+3,172	+$104K	1.4%
DE Dimensional ETF Trust	Added	+3,444	+$101K	2.8%
VI Vanguard Index Fds	Added	+201	+$61.1K	6.9%

Showing the 10 largest of 20 changes.

quarter ended March 31, 2025 · filed April 07, 2025

Company	Action	Shares changed	Value of change	% of portfolio
VI Vanguard Index Fds	New	+1,237	+$635K	0.4%
VI Vanguard Intl Equity Index F	New	+4,977	+$361K	0.2%
VE Vaneck ETF Trust	Trimmed	−7,136	−$328K	3.0%
VT Vanguard Tax-managed Fds	New	+5,599	+$285K	0.2%
VI Vanguard Intl Equity Index F	New	+3,389	+$238K	0.2%
VI Vanguard Index Fds	Added	+601	+$165K	6.3%
DE Dimensional ETF Trust	Added	+2,153	+$111K	16.8%
IT Ishares Tr	Trimmed	−628	−$63.2K	26.6%
DE Dimensional ETF Trust	Trimmed	−1,386	−$54.6K	15.1%
AC American Centy ETF Tr	Added	+757	+$52.8K	1.7%

Showing the 10 largest of 19 changes.

quarter ended December 31, 2024 · filed January 28, 2025

Company	Action	Shares changed	Value of change	% of portfolio
IT Ishares Tr	Trimmed	−7,134	−$716K	27.0%
DE Dimensional ETF Trust	Added	+12,226	+$434K	13.8%
DE Dimensional ETF Trust	Added	+8,013	+$328K	21.7%
DE Dimensional ETF Trust	Trimmed	−5,238	−$292K	18.3%
VS Vanguard Scottsdale Fds	Exited	−3,387	−$200K	—
AC American Centy ETF Tr	Added	+3,224	+$172K	0.2%
VE Vaneck ETF Trust	Added	+2,367	+$80.3K	2.4%
VI Vanguard Index Fds	Added	+156	+$45.2K	6.7%
IE Invesco Exch Traded Fd Tr Ii	Added	+765	+$15.7K	0.2%
AC American Centy ETF Tr	Added	+147	+$6.79K	0.2%

Showing the 10 largest of 15 changes.

quarter ended September 30, 2024 · filed October 02, 2024

Company	Action	Shares changed	Value of change	% of portfolio
IT Ishares Tr	Added	+32,223	+$3.25M	27.0%
DE Dimensional ETF Trust	Added	+24,763	+$720K	1.2%
DE Dimensional ETF Trust	Added	+16,739	+$477K	0.6%
DE Dimensional ETF Trust	Added	+9,078	+$378K	21.5%
VE Vaneck ETF Trust	Trimmed	−7,339	−$292K	2.7%
DE Dimensional ETF Trust	Added	+4,478	+$249K	18.1%
DE Dimensional ETF Trust	Added	+6,269	+$239K	14.2%
AC American Centy ETF Tr	New	+3,861	+$227K	0.1%
VS Vanguard Scottsdale Fds	New	+3,387	+$200K	0.1%
IE Invesco Exch Traded Fd Tr Ii	Added	+168	+$3.69K	0.2%

Showing the 10 largest of 14 changes.

quarter ended June 30, 2024 · filed July 18, 2024

Company	Action	Shares changed	Value of change	% of portfolio
VI Vanguard Index Fds	New	+34,689	+$9.28M	6.5%
IT Ishares Tr	Added	+80,851	+$8.14M	27.1%
DE Dimensional ETF Trust	New	+148,899	+$4.29M	3.0%
DE Dimensional ETF Trust	Trimmed	−73,543	−$3.81M	18.2%
DE Dimensional ETF Trust	Added	+18,476	+$497K	0.7%
DE Dimensional ETF Trust	New	+15,366	+$423K	0.3%
DE Dimensional ETF Trust	Trimmed	−6,256	−$246K	21.8%
DE Dimensional ETF Trust	Added	+4,793	+$172K	14.5%
VE Vaneck ETF Trust	Trimmed	−2,156	−$73.1K	2.7%
DE Dimensional ETF Trust	Added	+449	+$27K	2.5%

Showing the 10 largest of 16 changes.

quarter ended March 31, 2024 · filed April 03, 2024

Company	Action	Shares changed	Value of change	% of portfolio
IT Ishares Tr	Trimmed	−11,931	−$1.2M	24.0%
DE Dimensional ETF Trust	Added	+14,360	+$782K	24.7%
DE Dimensional ETF Trust	Added	+18,862	+$693K	16.5%
DE Dimensional ETF Trust	Added	+14,252	+$583K	25.7%
DE Dimensional ETF Trust	New	+20,869	+$565K	0.4%
IE Invesco Exch Traded Fd Tr Ii	Added	+46	+$1.51K	0.2%
DE Dimensional ETF Trust	Added	+23	+$1.43K	2.9%
IE Invesco Exchange Traded Fd T	Added	+28	+$1.1K	0.2%
IE Invesco Exch Traded Fd Tr Ii	Added	+36	+$699	0.2%
IE Invesco Exchange Traded Fd T	Added	+17	+$655	0.2%

Comments