Q2 2026 13F · SEC CIK 1635007

Mason Investment Advisory Services, Inc.

Institutional asset managerFiled 2026-08-13 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $2.6B
Reported positions: 84
Top holdings a year, 3 yrs: +21.2%
Assets under management: $15.7B

Mason Investment Advisory Services, Inc. is an institutional asset manager that reported 84 positions worth $2.6B in its Q2 2026 13F, filed 2026-08-13. Its largest holdings were Ishares (VLUE, 34.0%), Avantis US Small Cap Value ETF (AVUV, 13.4%), Vanguard Intl Equity Index F (VSS, 11.2%). A portfolio copying its top holdings returned 21.2% a year over the last 3 years, against 18.8% for the S&P 500.

Mason Investment Advisory Services, Inc. holdings largest 50 of 84 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Mason Investment Advisory Services, Inc. 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
VLUEIshares	34.0%	30.5%	4,471,056	-3.7%	$893.4M
AVUVAvantis US Small Cap Value ETF	13.4%	14.5%	2,824,089	-0.3%	$352.3M
VSSVanguard Intl Equity Index F	11.2%	12.8%	1,902,746	-0.1%	$293.6M
AVSCAmerican Centy ETF Tr	9.9%	10.3%	3,553,024	-0.9%	$260.6M
TGRTT. Rowe Price Growth ETF Total	9.8%	10.2%	5,646,517	+0.5%	$258.2M
AVDVAvantis International Small Cap Value Et	9.2%	10.9%	2,351,220	-0.4%	$242.3M
VBRVanguard Small Cap Value ETF	2.6%	2.8%	282,251	-0.3%	$68.6M
TURFT Rowe Price Exchange-Traded	2.1%	—	1,806,498	—	$56.1M
CGDVCapital Group Dividend Value ETF	1.6%	1.6%	844,702	+5.1%	$41.6M
CGXUCapital Group Intl Focus Eqt	1.2%	1.1%	892,693	+10.0%	$30.9M
MINTPimco ETF Tr	1.1%	1.3%	275,603	-0.9%	$27.8M
CGGRCapital Group Growth ETF	0.7%	0.7%	414,707	+13.6%	$19.6M
AVTMAmerican Centy ETF Tr	0.4%	0.4%	192,119	-6.2%	$10.5M
DFATDimensional U.s. Targeted Value	0.3%	0.3%	120,467	+0.2%	$8.4M
VNQIVanguard Global ex-US Real Estate ETF (V	0.3%	0.3%	175,711	+9.7%	$7.9M
SPYSpdr S&p 500 ETF Tr	0.1%	0.2%	5,257	+0.1%	$3.9M
VUGVanguard Indx Fd	0.1%	0.1%	45,077	+982.8%	$3.9M
EFVIshares Tr	0.1%	0.1%	33,784	+2.2%	$2.6M
FNDFSchwab Strategic Tr	0.1%	0.1%	44,934	+0.0%	$2.4M
XOMExxon Mobil Corp	0.1%	0.1%	16,185	-0.5%	$2.2M
VTVVanguard Value ETF	0.1%	0.0%	9,603	+128.5%	$2.1M
IWFIshares Russell 1000 Growth ETF	0.1%	0.0%	14,824	+739.4%	$1.8M
DFACDimensional U.s. Core Equity 2	0.1%	0.1%	38,485	+0.0%	$1.7M
CVXChevron Corp New	0.1%	0.1%	9,865	-3.8%	$1.6M
VGSHVanguard Short-Term Treasury ETF Total	0.1%	0.1%	25,923	+2.7%	$1.5M
AOAiShares Core Aggressive Allocation ETF	0.1%	0.1%	14,855	+10.5%	$1.4M
XLEState Street Energy Select Sector Spdr E	0.1%	—	26,388	—	$1.4M
AAPLApple Inc	0.1%	0.1%	4,651	-6.4%	$1.3M
EZMWisdomtree Tr	0.1%	0.1%	17,434	+0.0%	$1.3M
VTIVanguard Index Fds	0.0%	0.0%	3,332	+1.2%	$1.2M
MDYState Street Spdr S&p Midcap 400 ETF Tru	0.0%	0.1%	1,691	-3.8%	$1.2M
SPLGSpdr Series Trust	0.0%	0.0%	12,988	+0.0%	$1.1M
VIGVanguard Dividend Appreciation ETF	0.0%	0.0%	4,468	+0.2%	$1.1M
SPYVSpdr Series Trust	0.0%	0.0%	16,658	+0.1%	$1.0M
VDEVanguard World Fd	0.0%	0.1%	6,588	-1.2%	$989K
SCZIshares Msci Eafe Small Cap	0.0%	0.0%	11,981	+1.4%	$986K
ANETArista Networks Inc	0.0%	0.0%	4,955	+0.0%	$842K
IVVIshares Core S&p 500 ETF	0.0%	0.0%	1,093	+0.3%	$818K
VXFVanguard Index Fds	0.0%	0.0%	3,252	+0.1%	$801K
GNRState Street Spdr S&p Global Natural Res	0.0%	0.0%	11,785	-0.6%	$793K
VNQVanguard Real Estate ETF	0.0%	0.0%	8,194	+0.6%	$790K
VYMVym	0.0%	0.0%	4,973	+13.4%	$786K
VTEBVanguard Tx Ex Bd	0.0%	0.0%	15,449	+0.8%	$781K
MSFTMicrosoft Corp	0.0%	0.0%	2,054	-4.8%	$766K
FMATFidelity Covington Trust	0.0%	—	11,239	—	$658K
GOOGAlphabet Inc	0.0%	0.0%	1,856	+0.0%	$656K
VAWVanguard World Fd	0.0%	0.0%	2,809	+0.2%	$643K
VVVanguard Inx Lrg	0.0%	0.0%	1,782	+0.0%	$613K
ACIAlbertsons Cos Inc Com	0.0%	0.0%	42,670	+1.1%	$577K
IJHIshares Tr	0.0%	0.0%	7,321	+0.0%	$564K

What Mason Investment Advisory Services, Inc. bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +38.7% /yr; S&P 500 +20.1%
3 years: +21.2% /yr; S&P 500 +18.8%
5 years: —

A portfolio of the filer's 20 largest 13F positions, weighted by value and rebuilt each quarter on the day the filing became public. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$2.6B	84
Q1 2026	$2.2B	79
Q4 2025	$2.1B	80
Q3 2025	$2.0B	80
Q2 2025	$1.8B	74
Q1 2025	$1.7B	74
Q4 2024	$1.7B	71
Q3 2024	$1.7B	73
Q2 2024	$1.6B	73
Q1 2024	$1.4B	67
Q4 2023	$1.4B	64

Questions about Mason Investment Advisory Services, Inc.'s portfolio

What stocks does Mason Investment Advisory Services, Inc. own?

Mason Investment Advisory Services, Inc.'s latest 13F, for Q2 2026 and filed Aug 13, 2026, lists 84 positions worth $2.6B. The largest are Ishares (VLUE) at 34.0%, Avantis US Small Cap Value ETF (AVUV) at 13.4%, Vanguard Intl Equity Index F (VSS) at 11.2%, American Centy ETF Tr (AVSC) at 9.9% and T. Rowe Price Growth ETF Total (TGRT) at 9.8%.

What did Mason Investment Advisory Services, Inc. buy last quarter?

In Q2 2026, Mason Investment Advisory Services, Inc. added Vanguard Indx Fd (VUG) (+982.8% shares), Ishares Russell 1000 Growth ETF (IWF) (+739.4% shares) and Vanguard Value ETF (VTV) (+128.5% shares), compared with its Q1 2026 filing.

What did Mason Investment Advisory Services, Inc. sell last quarter?

In Q2 2026, Mason Investment Advisory Services, Inc. cut from its top 50 Vanguard S&p 500 ETF (VOO), cut from its top 50 Alphabet Inc (GOOGL), cut from its top 50 Ishares Russell 1000 Value ETF (IWD), Apple Inc (AAPL) (-6.4% shares) and American Centy ETF Tr (AVTM) (-6.2% shares), compared with its Q1 2026 filing.

How has Mason Investment Advisory Services, Inc.'s portfolio performed?

A portfolio copying Mason Investment Advisory Services, Inc.'s 20 largest 13F holdings each quarter, from the day each filing was public, returned +21.2% a year over the last 3 years, against +18.8% for the S&P 500. Over 1 year: +38.7% against +20.1%.

When is Mason Investment Advisory Services, Inc.'s next 13F filing due?

13F filings are due 45 days after each quarter ends. Mason Investment Advisory Services, Inc.'s filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does Mason Investment Advisory Services, Inc. manage?

Mason Investment Advisory Services, Inc. reported $15.7B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $2.6B.