Funds › Mason Investment Advisory Services, Inc.
Mason Investment Advisory Services, Inc.
13F for Q3 2026, filed Nov 13, 2026. 86 positions worth $2.6B.Managers with more than $100 million in US-listed stocks list their holdings each quarter, within 45 days of quarter end. Long positions only: no short sales or cash.
Latest report
Q3 2026
filed Nov 13, 2026
Reported value
$2.6B
−$3.9M (0.1%) vs Q2 2026
Positions
86
84 in Q2 2026
Top 10 share
95.0%
of reported value
CheckedEach line's price per share is checked against other managers' reports of the same stock. Unit mix-ups are corrected. Reports no fix can rescue are left out.
Clean
prices match other managers' reports
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Holdings, Q3 2026
Largest first. Common shares only; puts and calls are under All positions.
| # | The fund's own figures at the end of the quarter. A report can be up to 45 days old when it is filed. Options and bonds are not counted here. | Filing | ||||
|---|---|---|---|---|---|---|
| 1 | iShares Tr Msci Usa Value | 4.17M | $824.8M | 31.4% | -6.8% | 13F ↗ |
| 2 | American Centy ETF Tr Us Sml Cp Valu | 2.77M | $326.4M | 12.4% | -1.9% | 13F ↗ |
| 3 | Vanguard International Equity Index F Ftse Smcap Etf | 1.89M | $293.1M | 11.2% | -0.8% | 13F ↗ |
| 4 | T Rowe Price Exchange-Traded | 5.56M | $261.9M | 10.0% | -1.6% | 13F ↗ |
| 5 | American Centy ETF Tr Intl Smcp Vlu | 2.33M | $254.9M | 9.7% | -0.9% | 13F ↗ |
| 6 | American Centy ETF Tr Avan Us Smal Etf | 3.47M | $239.9M | 9.1% | -2.3% | 13F ↗ |
| 7 | T Rowe Price Exchange-Traded | 4.64M | $155.2M | 5.9% | +157% | 13F ↗ |
| 8 | Vanguard Index Fds Mrngstr Sml Cp V | 279,429 | $64.6M | 2.5% | -1.0% | 13F ↗ |
| 9 | Capital Group Dividend Value Units | 860,162 | $42.0M | 1.6% | +1.8% | 13F ↗ |
| 10 | Capital Group International Focus Eqt Units | 940,965 | $32.3M | 1.2% | +5.4% | 13F ↗ |
| 11 | Pimco ETF Tr Enhan Shrt Ma Ac | 225,637 | $22.7M | 0.9% | -18.1% | 13F ↗ |
| 12 | Capital Group Growth ETF Units | 437,602 | $20.8M | 0.8% | +5.5% | 13F ↗ |
| 13 | American Centy ETF Tr Avan Tota Eq Etf | 190,960 | $10.5M | 0.4% | -0.6% | 13F ↗ |
| 14 | Dimensional ETF Trust Us Targeted Vlu | 114,342 | $7.6M | 0.3% | -5.1% | 13F ↗ |
| 15 | Vanguard International Equity Index F Glb Ex Us Etf | 162,930 | $6.9M | 0.3% | -7.3% | 13F ↗ |
| 16 | Vanguard Index Fds Mrngstr Grwt Etf | 56,123 | $5.1M | 0.2% | +24.5% | 13F ↗ |
| 17 | SPY State Street SPDR S&P 500 ETF Trust · Trust units | 5,264 | $4.0M | 0.2% | +0.1% | 13F ↗ |
| 18 | Vanguard Index Fds Mrngstr Val Etf | 14,909 | $3.2M | 0.1% | +55.3% | 13F ↗ |
| 19 | XOM ExxonMobil Holdings Corporation | 16,831 | $2.7M | 0.1% | New | 13F ↗ |
| 20 | iShares Tr Eafe Value Etf | 33,784 | $2.7M | 0.1% | Unchanged | 13F ↗ |
| 21 | Schwab Strategic Tr Fundamental Intl | 45,146 | $2.4M | 0.1% | +0.5% | 13F ↗ |
| 22 | CVX Chevron Corporation | 9,875 | $2.0M | 0.1% | +0.1% | 13F ↗ |
| 23 | iShares Tr Rus 1000 Grw Etf | 14,825 | $1.9M | 0.1% | Unchanged | 13F ↗ |
| 24 | Vanguard Scottsdale Fds Short Term Treas | 30,592 | $1.8M | 0.1% | +18.0% | 13F ↗ |
| 25 | Dimensional ETF Trust Us Cor Equ 2 Etf | 38,485 | $1.7M | 0.1% | Unchanged | 13F ↗ |
| 26 | iShares Tr Core 80 20 Etf | 16,178 | $1.6M | 0.1% | +8.9% | 13F ↗ |
| 27 | AAPL Apple Inc. | 4,499 | $1.5M | 0.1% | -3.3% | 13F ↗ |
| 28 | Vanguard World Fd Deve Ma Valu Etf | 17,600 | $1.3M | 0.1% | New | 13F ↗ |
| 29 | Wisdomtree Tr Us Midcap Fund | 17,434 | $1.2M | <0.1% | Unchanged | 13F ↗ |
| 30 | Vanguard Index Fds Mrngstr Ttl Stk | 3,335 | $1.2M | <0.1% | +0.1% | 13F ↗ |
| 31 | Vanguard Index Fds S&P 500 Etf Shs | 1,739 | $1.2M | <0.1% | +123% | 13F ↗ |
| 32 | Spdr Series Trust St Str P500ETF | 13,016 | $1.2M | <0.1% | +0.2% | 13F ↗ |
| 33 | Vanguard World Fd Energy Etf | 6,744 | $1.2M | <0.1% | +2.4% | 13F ↗ |
| 34 | MDY State Street SPDR S&P MIDCAP 400 ETF Trust · UTSER1 S&PDCRP | 1,691 | $1.1M | <0.1% | Unchanged | 13F ↗ |
| 35 | Vanguard Index Fds Real Estate Etf | 12,218 | $1.1M | <0.1% | +49.1% | 13F ↗ |
| 36 | MSFT Microsoft Corporation | 2,055 | $1.1M | <0.1% | Unchanged | 13F ↗ |
| 37 | Vanguard Specialized Funds Div App Etf | 4,436 | $1.0M | <0.1% | -0.7% | 13F ↗ |
| 38 | Spdr Series Trust St Str P500VAL | 16,622 | $1.0M | <0.1% | -0.2% | 13F ↗ |
| 39 | iShares Tr Equities | 11,981 | $1.0M | <0.1% | Unchanged | 13F ↗ |
| 40 | Spdr Index Shs Fds St Str Nat Etf | 11,743 | $868.7K | <0.1% | -0.4% | 13F ↗ |
| 41 | iShares Tr Core S&P500 Etf | 1,092 | $836.0K | <0.1% | -0.1% | 13F ↗ |
| 42 | Vanguard World Fd Deve Ma Grow Etf | 10,205 | $808.3K | <0.1% | New | 13F ↗ |
| 43 | ANET Arista Networks, Inc. | 3,705 | $754.3K | <0.1% | -25.2% | 13F ↗ |
| 44 | Vanguard Mun Bd Fds Tax Exempt Bd | 15,582 | $738.0K | <0.1% | +0.9% | 13F ↗ |
| 45 | Vanguard World Fd Materials Etf | 2,932 | $639.6K | <0.1% | +4.4% | 13F ↗ |
| 46 | GOOG Alphabet Inc. Class C | 1,856 | $632.6K | <0.1% | Unchanged | 13F ↗ |
| 47 | Vanguard Whitehall Fds High Div Yld | 3,580 | $555.6K | <0.1% | -28.0% | 13F ↗ |
| 48 | Vanguard Scottsdale Fds INT-TERM Corp | 6,860 | $537.2K | <0.1% | +0.6% | 13F ↗ |
| 49 | iShares Tr Core S&P Mcp Etf | 7,322 | $526.8K | <0.1% | Unchanged | 13F ↗ |
| 50 | Vanguard Index Fds Extend Mkt Etf | 2,152 | $498.5K | <0.1% | -33.8% | 13F ↗ |
Showing the top 50 of 86 positions. Premium lists every position, plus puts and calls.
Changes since Q2 2026
7 new, 34 added to, 22 trimmed, 5 exited, 23 unchanged. By estimated dollars.
New positions (7)
| XOM ExxonMobil Holdings Corporation | 16,831 | New | $2.7M |
| Vanguard World Fd Deve Ma Valu Etf | 17,600 | New | $1.3M |
| Vanguard World Fd Deve Ma Grow Etf | 10,205 | New | $808.3K |
| Vanguard Instl Index Fd 0 3 Mo Tr Bi Etf | 5,580 | New | $422.5K |
| Aim ETF Products Trust Allianzim Us Eqt | 9,147 | New | $309.9K |
| Vanguard Index Fds Sml Cp Grw Etf | 724 | New | $244.7K |
| CABA Cabaletta Bio, Inc. | 10,000 | New | $19.2K |
Added to (34)
| T Rowe Price Exchange-Traded | 4.64M | +157% | $94.8M |
| Capital Group International Focus Eqt Units | 940,965 | +5.4% | $1.7M |
| Vanguard Index Fds Mrngstr Val Etf | 14,909 | +55.3% | $1.1M |
| Capital Group Growth ETF Units | 437,602 | +5.5% | $1.1M |
| Vanguard Index Fds Mrngstr Grwt Etf | 56,123 | +24.5% | $995.4K |
| Capital Group Dividend Value Units | 860,162 | +1.8% | $755.2K |
| Vanguard Index Fds S&P 500 Etf Shs | 1,739 | +123% | $673.0K |
| Vanguard Index Fds Real Estate Etf | 12,218 | +49.1% | $360.7K |
| Vanguard Scottsdale Fds Short Term Treas | 30,592 | +18.0% | $268.7K |
| iShares Tr Core 80 20 Etf | 16,178 | +8.9% | $128.7K |
Trimmed (22)
| iShares Tr Msci Usa Value | 4.17M | -6.8% | -$60.5M |
| American Centy ETF Tr Us Sml Cp Valu | 2.77M | -1.9% | -$6.2M |
| American Centy ETF Tr Avan Us Smal Etf | 3.47M | -2.3% | -$5.7M |
| Pimco ETF Tr Enhan Shrt Ma Ac | 225,637 | -18.1% | -$5.0M |
| T Rowe Price Exchange-Traded | 5.56M | -1.6% | -$4.2M |
| Vanguard International Equity Index F Ftse Smcap Etf | 1.89M | -0.8% | -$2.3M |
| American Centy ETF Tr Intl Smcp Vlu | 2.33M | -0.9% | -$2.2M |
| Select Sector Spdr Tr St Str Energ Etf | 5,438 | -79.4% | -$1.3M |
| Vanguard Index Fds Mrngstr Sml Cp V | 279,429 | -1.0% | -$652.0K |
| Vanguard International Equity Index F Glb Ex Us Etf | 162,930 | -7.3% | -$543.4K |
Exited (5)
| Exxon Mobil Corp | 16,185 | Exited | -$2.2M |
| Fidelity Covington Trust Msci Matls Index | 11,239 | Exited | -$657.6K |
| Vanguard Index Fds Mrngstr Lrg Cap | 1,782 | Exited | -$612.8K |
| Spdr Series Trust St Intl Bbg Etf | 15,995 | Exited | -$346.8K |
| Aim ETF Products Trust Allianzim Us Eqt | 8,194 | Exited | -$304.3K |
The 10 largest of each, by estimated dollars: shares changed times the later report's price. Index tracking, splits and mergers move positions too.
All positions
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Reported value by quarter
Value and number of positions at the end of each quarter.
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Largest positions in earlier quarters
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Ten largest positions
By value, Q3 2026.
Filings
| Filing | ||||||
|---|---|---|---|---|---|---|
| Q3 2026 | Nov 13, 2026 | 13F-HR | 86 | $2.6B | Current | SEC ↗ |
| Q2 2026 | Aug 13, 2026 | 13F-HR | 84 | $2.6B | Current | SEC ↗ |
| Q1 2026 | May 14, 2026 | 13F-HR | 79 | $2.2B | Current | SEC ↗ |
| Q4 2025 | Feb 12, 2026 | 13F-HR | 80 | $2.1B | Current | SEC ↗ |
| Q3 2025 | Nov 12, 2025 | 13F-HR | 80 | $2.0B | Current | SEC ↗ |
| Q2 2025 | Aug 5, 2025 | 13F-HR | 74 | $1.8B | Current | SEC ↗ |
| Q1 2025 | May 1, 2025 | 13F-HR | 74 | $1.7B | Current | SEC ↗ |
Most recent first, up to 80. An amendment can replace a report or add holdings to it. All 13F filings
Information, not investment advice. Values are the fund's own figures at quarter end; a report can be up to 45 days old when filed. Disclaimer