Mason Investment Advisory Services, Inc.

CIK

1635007

Location

Reston, VA

Portfolio Value

Mid $2,629,254,340

Diversification

Highly concentrated

Files via

Aperio Group, LLC BlackRock, Inc.

Filing Date

Global Rank

#1,358 / 8,794 ▲ 267 · as of Jun 2026

Top Industry

Oil & Gas Integrated 35.1%

Period ended 3 months ago

Filed Aug 13, 2026 · 53d

26 quarters · since Mar 2020

Clone Performance

Build a hypothetical price-return history from this filer's public 13F holdings.

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Portfolio Concentration

47 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026

Top Position

34.3%

−17.9 pts

Top 5

93.6%

+1.0 pts

Top 10

98.5%

+0.6 pts

HHI

2,550

Highly concentrated−790

Portfolio Trend

26 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026

Sector	% Portfolio	Value	Positions
Unclassified	99.6%	$2,618,276,317	31
Energy	0.1%	$3,848,035	2
Technology	0.1%	$3,475,120	5
Communication Services	0.0%	$1,168,963	1
Consumer Defensive	0.0%	$969,286	2
Consumer Cyclical	0.0%	$645,660	2
Financial Services	0.0%	$490,113	2
Healthcare	0.0%	$380,846	2

Last Quarter's Activity

Export CSV

Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased

20 positions

Ticker	Company	Δ Shares	Shares	Value
TACN	T. Rowe Price Active Core International Equity ETF	+1,830,062	7,453,015	$314,306,521
CGXU	Capital Group International Focus Equity ETF	+80,999	892,693	$30,905,031
CGGR	Capital Group Growth ETF	+49,632	414,707	$19,574,170
VB	Vanguard Morningstar Small-Cap ETF	+46,259	343,567	$77,165,945
CGDV	Capital Group Dividend Value ETF	+41,264	844,702	$41,626,914
XLBI	State Street Materials Select Sector SPDR Premium Income ETF	+21,071	26,388	$1,401,466
FNDA	Schwab Fundamental U.S. Small Company ETF	+16,161	84,570	$3,481,424
BWX	State Street SPDR Bloomberg International Treasury Bond ETF	+16,019	45,641	$2,500,795
VEU	Vanguard FTSE All-World Ex-US ETF	+13,116	2,078,457	$301,455,318
BNDW	Vanguard Total World Bond ETF	+2,976	32,739	$2,072,060
—		+1,411	14,855	$1,449,848
AIOO	AllianzIM U.S. Equity Buffer100 Protection ETF	+509	8,194	$304,325
ACI	Albertsons Companies, Inc.	+451	42,670	$577,325
DCOR	Dimensional US Core Equity 1 ETF	+212	158,952	$10,127,837
VCRM	Vanguard Core Tax-Exempt Bond ETF	+130	15,449	$781,410
VIG	Vanguard Dividend Appreciation ETF	+56	12,662	$1,847,365
VFMF	Vanguard U.S. Multifactor ETF	+53	2,032	$205,861
VEA	Vanguard FTSE Developed Markets ETF	+25	4,848	$345,420
SPY	Spdr S&P 500 ETF Trust	+6	5,257	$3,925,769
—		+2	3,252	$800,674
No positions match the current search.

Trimmed

Positions the filer reduced

19 positions

Ticker	Company	Δ Shares	Shares	Value
AAXJ	iShares MSCI All Country Asia ex Japan ETF	−160,705	4,553,578	$902,166,057
ACSG	American Century Small Cap Growth Insights ETF	−63,510	8,920,452	$865,664,302
BILZ	PIMCO Ultra Short Government Active ETF	−2,552	275,603	$27,783,538
VIGI	Vanguard International Dividend Appreciation ETF	−686	7,212	$1,005,752
CVX	Chevron Corp	−392	9,865	$1,635,222
AAPL	Apple Inc.	−317	4,651	$1,345,813
CWI	State Street SPDR MSCI ACWI ex-US ETF	−300	17,778	$1,055,501
AMZN	Amazon Com Inc	−130	1,540	$367,043
MSFT	Microsoft Corp	−104	2,054	$766,183
GOOGL	Alphabet Inc.	−98	3,292	$1,168,963
TSM	Taiwan Semiconductor Manufacturing Co Ltd	−90	511	$244,038
XOM	ExxonMobil Holdings Corp	−89	16,185	$2,212,813
EDV	Vanguard World Funds Extended Duration ETF	−74	9,397	$1,631,727
MDY	Spdr S&P Midcap 400 ETF Trust	−67	1,691	$1,189,347
V	Visa Inc.	−65	727	$249,426
HD	Home Depot, Inc.	−29	790	$278,617
ABI	VictoryShares Pioneer Asset-Based Income ETF	−19	1,912	$240,606
LLY	ELI LILLY & Co	−15	270	$323,846
COST	Costco Wholesale Corp /New	−8	419	$391,961
No positions match the current search.

New Positions

Positions the filer opened this quarter

3 positions

Ticker	Company	Shares	Value
FBCG	Fidelity Blue Chip Growth ETF	11,239	$657,593
BNDX	Vanguard Total International Bond ETF	7,608	$368,455
LRCX	Lam Research Corp	640	$277,331
No positions match the current search.

Sold Out

Positions the filer fully exited

3 positions

Ticker	Company	Shares	Value
INGR	Ingredion Inc	2,051	$231,065
INTU	Intuit Inc.	503	$217,487
—		828	$206,039
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

47 tracked positions · $2,629,254,340 total · filing declares 84 positions · $2,629,255,698 · as of Jun 30, 2026

All sectors Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Healthcare Technology

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
AAXJ	iShares MSCI All Country Asia ex Japan ETF	Reduced	4,553,578	-160,705	$902,166,057	—	34.31%
ACSG	American Century Small Cap Growth Insights ETF	Reduced	8,920,452	-63,510	$865,664,302	+10.7%	32.92%
TACN	T. Rowe Price Active Core International Equity ETF	Added	7,453,015	+1,830,062	$314,306,521	+42.2%	11.95%
VEU	Vanguard FTSE All-World Ex-US ETF	Added	2,078,457	+13,116	$301,455,318	+5.8%	11.47%
VB	Vanguard Morningstar Small-Cap ETF	Added	343,567	+46,259	$77,165,945	+19.3%	2.93%
CGDV	Capital Group Dividend Value ETF	Added	844,702	+41,264	$41,626,914	+21.8%	1.58%
CGXU	Capital Group International Focus Equity ETF	Added	892,693	+80,999	$30,905,031	+29.1%	1.18%
BILZ	PIMCO Ultra Short Government Active ETF	Reduced	275,603	-2,552	$27,783,538	−0.7%	1.06%
CGGR	Capital Group Growth ETF	Added	414,707	+49,632	$19,574,170	+33.4%	0.74%
DCOR	Dimensional US Core Equity 1 ETF	Added	158,952	+212	$10,127,837	+12.5%	0.39%
SPY	Spdr S&P 500 ETF Trust	Added	5,257	+6	$3,925,769	+15.0%	0.15%
FNDA	Schwab Fundamental U.S. Small Company ETF	Added	84,570	+16,161	$3,481,424	+25.9%	0.13%
BWX	State Street SPDR Bloomberg International Treasury Bond ETF	Added	45,641	+16,019	$2,500,795	+29.2%	0.10%
XOM	ExxonMobil Holdings Corp Energy	Reduced	16,185	-89	$2,212,813	−19.9%	0.08%
BNDW	Vanguard Total World Bond ETF	Added	32,739	+2,976	$2,072,060	+11.9%	0.08%
AGGY	WisdomTree Yield Enhanced U.S. Aggregate Bond Fund	Held	28,920	0	$2,014,975	+10.9%	0.08%
VIG	Vanguard Dividend Appreciation ETF	Added	12,662	+56	$1,847,365	+9.9%	0.07%
CVX	Chevron Corp Energy	Reduced	9,865	-392	$1,635,222	−22.9%	0.06%
EDV	Vanguard World Funds Extended Duration ETF	Reduced	9,397	-74	$1,631,727	−8.6%	0.06%
		Added	14,855	+1,411	$1,449,848	+21.9%	0.06%
XLBI	State Street Materials Select Sector SPDR Premium Income ETF	Added	26,388	+21,071	$1,401,466	+330.3%	0.05%
AAPL	Apple Inc. Technology	Reduced	4,651	-317	$1,345,813	+6.7%	0.05%
MDY	Spdr S&P Midcap 400 ETF Trust	Reduced	1,691	-67	$1,189,347	+9.7%	0.05%
GOOGL	Alphabet Inc. Communication Services	Reduced	3,292	-98	$1,168,963	+20.1%	0.04%
CWI	State Street SPDR MSCI ACWI ex-US ETF	Reduced	17,778	-300	$1,055,501	−8.1%	0.04%
VIGI	Vanguard International Dividend Appreciation ETF	Reduced	7,212	-686	$1,005,752	+2.6%	0.04%
ANET	Arista Networks, Inc. Technology	Held	4,955	0	$841,755	+38.4%	0.03%
		Added	3,252	+2	$800,674	+19.7%	0.03%
VCRM	Vanguard Core Tax-Exempt Bond ETF	Added	15,449	+130	$781,410	+2.2%	0.03%
MSFT	Microsoft Corp Technology	Reduced	2,054	-104	$766,183	−4.1%	0.03%
FBCG	Fidelity Blue Chip Growth ETF	NEW	11,239	NEW	$657,593	NEW	0.03%
ACI	Albertsons Companies, Inc. Consumer Defensive	Added	42,670	+451	$577,325	−19.8%	0.02%
COST	Costco Wholesale Corp /New Consumer Defensive	Reduced	419	-8	$391,961	−7.9%	0.01%
BNDX	Vanguard Total International Bond ETF	NEW	7,608	NEW	$368,455	NEW	0.01%
AMZN	Amazon Com Inc Consumer Cyclical	Reduced	1,540	-130	$367,043	+5.5%	0.01%
VEA	Vanguard FTSE Developed Markets ETF	Added	4,848	+25	$345,420	+11.8%	0.01%
LLY	ELI LILLY & Co Healthcare	Reduced	270	-15	$323,846	+23.5%	0.01%
AIOO	AllianzIM U.S. Equity Buffer100 Protection ETF	Added	8,194	+509	$304,325	+2.0%	0.01%
HD	Home Depot, Inc. Consumer Cyclical	Reduced	790	-29	$278,617	+3.4%	0.01%
LRCX	Lam Research Corp Technology	NEW	640	NEW	$277,331	NEW	0.01%
V	Visa Inc. Financial Services	Reduced	727	-65	$249,426	+4.2%	0.01%
TSM	Taiwan Semiconductor Manufacturing Co Ltd Technology	Reduced	511	-90	$244,038	+20.2%	0.01%
BRK-B	Berkshire Hathaway Inc Financial Services	Held	481	0	$240,687	+4.4%	0.01%
ABI	VictoryShares Pioneer Asset-Based Income ETF	Reduced	1,912	-19	$240,606	+4.0%	0.01%
GLDM	World Gold Trust	Held	2,774	0	$220,311	−14.3%	0.01%
VFMF	Vanguard U.S. Multifactor ETF	Added	2,032	+53	$205,861	+2.9%	0.01%
PGEN	Precigen, Inc. Healthcare	Held	10,000	0	$57,000	+47.3%	0.00%

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.