Institutional
American Investment Services, Inc.
CIK 0001369913
$448.3M
Reported AUM
132
Positions
Q1 2026
Period
2026-05-13
Filed
The Brief · American Investment Services, Inc. · Q1 2026
AI · grounded in 13F
American Investment Services, Inc. significantly increased its stake in VSDM by 2,707.04%. The fund established a new position in UNH valued at $1,028,784 and grew its holding in DFNM by 24.23%. Conversely, the fund exited positions in CSCO and CAT, reducing its exposure by $736,947 and $597,504 respectively.
Portfolio · Q1 2026
Top holdings
QoQ vs Q4 2025
| # | Stock | Issuer | Price | Day % | 1Y Gr. | 5Y Gr. | Value | % of book | Δ shares (QoQ) | Status |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | GLDM | WORLD GOLD TR | $85.42 | -3.67% | 30.23% | 136.75% | $43.5M | 9.70% | −43,640 | −8.5% |
| 2 | VUG | VANGUARD INDEX FDS | $85.93 | -3.62% | 22.71% | 78.84% | $34.6M | 7.73% | +116 | +0.1% |
| 3 | DFUV | DIMENSIONAL ETF TRUST | $53.53 | -1.98% | 32.09% | 81.58% | $23.3M | 5.19% | −5,455 | −1.1% |
| 4 | VYMI | VANGUARD WHITEHALL FDS | $98.05 | -1.98% | 27.56% | 80.17% | $20.5M | 4.57% | −7,311 | −3.3% |
| 5 | DFIC | DIMENSIONAL ETF TRUST | $37.23 | -2.46% | 24.13% | 76.20% | $14.1M | 3.15% | +10,264 | +2.6% |
| 6 | DFAS | DIMENSIONAL ETF TRUST | $77.60 | -2.07% | 25.24% | 44.55% | $12.8M | 2.84% | −2,696 | −1.5% |
| 7 | DFUS | DIMENSIONAL ETF TRUST | $80.40 | -2.76% | 24.86% | 77.03% | $12.3M | 2.74% | +11,560 | +7.1% |
| 8 | CVX | CHEVRON CORPORATION | $187.31 | -0.55% | 39.19% | 125.88% | $11.8M | 2.64% | −405 | −0.7% |
| 9 | VTV | VANGUARD INDEX FDS | $212.02 | -1.36% | 25.17% | 71.24% | $11.8M | 2.63% | +450 | +0.8% |
| 10 | VPU | VANGUARD WORLD FD | $192.36 | 0.79% | 12.79% | 54.49% | $10.6M | 2.35% | −650 | −1.2% |
| 11 | VZ | VERIZON COMMUNICATIONS INC | $45.37 | 1.11% | 10.56% | 10.94% | $9.5M | 2.13% | −13,994 | −6.9% |
| 12 | DFGR | DIMENSIONAL ETF TRUST | $28.79 | 0.24% | 11.75% | 20.67% | $9.5M | 2.13% | +23,979 | +7.2% |
| 13 | DFEM | DIMENSIONAL ETF TRUST | $38.68 | -6.14% | 37.54% | 67.70% | $9.3M | 2.08% | +4,179 | +1.6% |
| 14 | DFAT | DIMENSIONAL ETF TRUST | $67.12 | -1.13% | 29.21% | 63.15% | $8.9M | 1.99% | −2,813 | −1.9% |
| 15 | VSDM | VANGUARD MUN BD FDS | $76.43 | -0.03% | 5.11% | 7.09% | $8.9M | 1.98% | +112,315 | +2707.0% |
| 16 | DFAW | DIMENSIONAL ETF TRUST | $81.24 | -2.79% | 26.14% | 76.38% | $8.4M | 1.87% | +1,115 | +1.0% |
| 17 | VEA | VANGUARD TAX-MANAGED FDS | $69.17 | -3.72% | 26.80% | 55.20% | $8.1M | 1.80% | −4,071 | −3.1% |
| 18 | IAU | ISHARES GOLD TR | $81.22 | -3.63% | 30.01% | 135.01% | $8.0M | 1.79% | −11,074 | −10.8% |
| 19 | MRK | MERCK & CO INC | $120.79 | 0.44% | 58.51% | 82.35% | $8.0M | 1.78% | +10,674 | +19.1% |
| 20 | DFAX | DIMENSIONAL ETF TRUST | $36.30 | -3.82% | 28.82% | 57.51% | $7.9M | 1.76% | −5,003 | −2.1% |
| 21 | VBR | VANGUARD INDEX FDS | $234.32 | -1.10% | 24.65% | 51.77% | $6.7M | 1.49% | +152 | +0.5% |
| 22 | VB | VANGUARD INDEX FDS | $288.20 | -2.44% | 25.47% | 39.47% | $6.6M | 1.48% | +411 | +1.6% |
| 23 | VNQ | VANGUARD INDEX FDS | $96.79 | 0.72% | 11.98% | 9.39% | $6.3M | 1.41% | +675 | +1.0% |
| 24 | SHV | ISHARES TR | $110.12 | 0.03% | 4.27% | 17.77% | $5.6M | 1.26% | +966 | +1.9% |
| 25 | DFSV | DIMENSIONAL ETF TRUST | $37.57 | -1.39% | 32.84% | 54.27% | $5.4M | 1.21% | +3,633 | +2.4% |
| 26 | JNJ | JOHNSON & JOHNSON | $232.77 | 2.02% | 53.90% | 55.59% | $5.4M | 1.21% | −1,195 | −5.1% |
| 27 | VOO | VANGUARD INDEX FDS | $678.00 | -2.59% | 24.60% | 80.00% | $5.1M | 1.15% | +366 | +4.4% |
| 28 | AMGN | AMGEN INC | $349.58 | 1.15% | 24.03% | 69.41% | $4.9M | 1.10% | +1,628 | +13.2% |
| 29 | DFNM | DIMENSIONAL ETF TRUST | $48.30 | -0.04% | 5.37% | 6.30% | $4.7M | 1.05% | +19,119 | +24.2% |
| 30 | DFLV | DIMENSIONAL ETF TRUST | $39.13 | -1.71% | 31.20% | 58.47% | $4.6M | 1.04% | +18,752 | +16.8% |
| 31 | SCHO | SCHWAB STRATEGIC TR | $24.06 | -0.21% | — | — | $4.4M | 0.98% | +17,846 | +10.9% |
| 32 | VTEB | VANGUARD MUN BD FDS | $50.30 | -0.16% | — | — | $4.1M | 0.91% | −1,068 | −1.3% |
| 33 | VWO | VANGUARD INTL EQUITY INDEX F | $58.03 | -3.78% | — | — | $3.8M | 0.85% | −206 | −0.3% |
| 34 | SPDW | SPDR INDEX SHS FDS | $49.33 | -3.71% | — | — | $3.4M | 0.75% | −2,349 | −3.1% |
| 35 | SPYV | SPDR SERIES TRUST | $60.69 | -1.12% | — | — | $3.3M | 0.74% | −606 | −1.0% |
| 36 | VCIT | VANGUARD SCOTTSDALE FDS | $81.91 | -0.56% | — | — | $3.2M | 0.71% | +82 | +0.2% |
| 37 | VGSH | VANGUARD SCOTTSDALE FDS | $58.04 | -0.17% | — | — | $2.9M | 0.66% | +1,038 | +2.1% |
| 38 | SHY | ISHARES TR | $81.86 | -0.21% | — | — | $2.8M | 0.62% | −1,391 | −3.9% |
| 39 | DFAI | DIMENSIONAL ETF TRUST | $40.82 | -2.44% | — | — | $2.8M | 0.62% | +1,570 | +2.2% |
| 40 | BRK/B | BERKSHIRE HATHAWAY INC DEL | — | — | — | — | $2.7M | 0.61% | — | HELD |
| 41 | SCHB | SCHWAB STRATEGIC TR | $28.45 | -2.70% | — | — | $2.6M | 0.58% | −11,726 | −10.2% |
| 42 | BSV | VANGUARD BD INDEX FDS | $77.60 | -0.26% | — | — | $2.5M | 0.56% | +3,393 | +11.7% |
| 43 | SPYM | SPDR SERIES TRUST | $86.81 | -2.58% | — | — | $2.5M | 0.55% | −775 | −2.3% |
| 44 | AGG | ISHARES TR | $98.17 | -0.50% | — | — | $2.3M | 0.50% | +2,388 | +11.7% |
| 45 | SCHA | SCHWAB STRATEGIC TR | $33.19 | -3.41% | — | — | $2.2M | 0.50% | −2,085 | −2.7% |
| 46 | VTI | VANGUARD INDEX FDS | $363.38 | -2.68% | — | — | $2.2M | 0.49% | −18 | −0.3% |
| 47 | SCHX | SCHWAB STRATEGIC TR | $29.05 | -2.65% | — | — | $2.2M | 0.49% | −453 | −0.5% |
| 48 | DFGP | DIMENSIONAL ETF TRUST | $54.38 | -0.30% | — | — | $1.9M | 0.43% | +1,828 | +5.3% |
| 49 | DFIV | DIMENSIONAL ETF TRUST | $54.66 | -2.25% | — | — | $1.9M | 0.42% | — | HELD |
| 50 | DFSD | DIMENSIONAL ETF TRUST | $47.74 | -0.25% | — | — | $1.9M | 0.42% | +2,930 | +8.2% |
| 51 | IVW | ISHARES TR | $134.60 | -3.81% | — | — | $1.9M | 0.41% | −405 | −2.4% |
| 52 | RSP | INVESCO EXCHANGE TRADED FD T | $207.83 | -1.42% | — | — | $1.8M | 0.41% | — | HELD |
| 53 | DFAU | DIMENSIONAL ETF TRUST | $50.85 | -2.62% | — | — | $1.8M | 0.41% | +1,640 | +4.2% |
| 54 | VV | VANGUARD INDEX FDS | $339.76 | -2.62% | — | — | $1.8M | 0.39% | +88 | +1.5% |
| 55 | TIP | ISHARES TR | $109.25 | -0.48% | — | — | $1.7M | 0.37% | +315 | +2.1% |
| 56 | IJS | ISHARES TR | $130.17 | -1.74% | — | — | $1.5M | 0.33% | −344 | −2.7% |
| 57 | IWF | ISHARES TR | $122.69 | -3.26% | — | — | $1.5M | 0.33% | −137 | −3.8% |
| 58 | DFAE | DIMENSIONAL ETF TRUST | $38.14 | -6.38% | — | — | $1.4M | 0.32% | +1,050 | +2.5% |
| 59 | DUHP | DIMENSIONAL ETF TRUST | $40.69 | -2.35% | — | — | $1.3M | 0.30% | −966 | −2.6% |
| 60 | BND | VANGUARD BD INDEX FDS | $72.83 | -0.45% | — | — | $1.3M | 0.29% | +2,502 | +16.3% |
| 61 | LLY | ELI LILLY & CO | $1131.42 | 0.55% | — | — | $1.3M | 0.29% | +14 | +1.0% |
| 62 | SCHF | SCHWAB STRATEGIC TR | $26.81 | -3.77% | — | — | $1.3M | 0.29% | — | HELD |
| 63 | SLYV | SPDR SERIES TRUST | $103.95 | -1.65% | — | — | $1.3M | 0.29% | — | HELD |
| 64 | VONE | VANGUARD SCOTTSDALE FDS | $333.60 | -2.51% | — | — | $1.3M | 0.28% | −144 | −3.3% |
| 65 | UNH | UNITEDHEALTH GROUP INC | $399.47 | 0.76% | — | — | $1.0M | 0.23% | +3,802 | NEW |
| 66 | IBM | INTERNATIONAL BUSINESS MACHS | $284.84 | -5.61% | — | — | $1.0M | 0.23% | −5,443 | −56.6% |
| 67 | SCHE | SCHWAB STRATEGIC TR | $35.15 | -4.07% | — | — | $972K | 0.22% | — | HELD |
| 68 | PLD | PROLOGIS INC. | $144.54 | 0.52% | — | — | $935K | 0.21% | — | HELD |
| 69 | SPEM | SPDR INDEX SHS FDS | $50.53 | -4.04% | — | — | $920K | 0.21% | −74 | −0.4% |
| 70 | EQIX | EQUINIX INC | $1080.95 | -0.75% | — | — | $911K | 0.20% | — | HELD |
| 71 | IWD | ISHARES TR | $236.42 | -1.91% | — | — | $871K | 0.19% | — | HELD |
| 72 | VSDB | VANGUARD MALVERN FDS | $75.94 | -0.25% | — | — | $826K | 0.18% | −3,402 | −23.9% |
| 73 | VTIP | VANGUARD MALVERN FDS | $50.31 | -0.20% | — | — | $771K | 0.17% | +3,649 | +31.0% |
| 74 | XOM | EXXON MOBIL CORP | $149.92 | -1.39% | — | — | $770K | 0.17% | −1,307 | −22.4% |
| 75 | BRK/A | BERKSHIRE HATHAWAY INC DEL | — | — | — | — | $718K | 0.16% | — | HELD |
| 76 | NEE | NEXTERA ENERGY INC | $85.84 | 0.19% | — | — | $705K | 0.16% | — | HELD |
| 77 | HD | HOME DEPOT INC | $310.78 | 0.27% | — | — | $704K | 0.16% | — | HELD |
| 78 | DFVX | DIMENSIONAL ETF TRUST | $81.49 | -2.01% | — | — | $684K | 0.15% | −2,466 | −21.1% |
| 79 | SPSM | SPDR SERIES TRUST | $53.57 | -1.78% | — | — | $682K | 0.15% | — | HELD |
| 80 | JPM | JPMORGAN CHASE & CO | $312.37 | 0.48% | — | — | $677K | 0.15% | — | HELD |
| 81 | IJR | ISHARES TR | $137.68 | -1.84% | — | — | $676K | 0.15% | −161 | −2.9% |
| 82 | IBKR | INTERACTIVE BROKERS GROUP IN | $84.40 | -3.06% | — | — | $671K | 0.15% | +10,000 | NEW |
| 83 | IVV | ISHARES TR | $740.91 | -2.62% | — | — | $669K | 0.15% | −6 | −0.6% |
| 84 | IWM | ISHARES TR | $281.65 | -3.55% | — | — | $614K | 0.14% | — | HELD |
| 85 | PEP | PEPSICO INC | $141.92 | -0.16% | — | — | $614K | 0.14% | — | HELD |
| 86 | EEM | ISHARES TR | $64.59 | -6.53% | — | — | $613K | 0.14% | −225 | −2.0% |
| 87 | VGT | VANGUARD WORLD FD | $115.28 | -6.14% | — | — | $592K | 0.13% | +18 | +2.2% |
| 88 | DFAR | DIMENSIONAL ETF TRUST | $26.13 | 0.81% | — | — | $561K | 0.13% | +10 | +0.0% |
| 89 | AMT | AMERICAN TOWER CORP | $194.12 | 0.11% | — | — | $561K | 0.13% | −351 | −9.8% |
| 90 | DOW | DOW HLDGS INC | $33.97 | -2.36% | — | — | $554K | 0.12% | −25,078 | −65.4% |
| 91 | DLR | DIGITAL RLTY TR INC | $186.79 | -1.01% | — | — | $546K | 0.12% | — | HELD |
| 92 | KO | COCA COLA CO | $79.48 | 3.46% | — | — | $543K | 0.12% | −15 | −0.2% |
| 93 | CI | THE CIGNA GROUP | $289.48 | 3.14% | — | — | $542K | 0.12% | — | HELD |
| 94 | SPY | STATE STR SPDR S&P 500 ETF T | $737.55 | -2.58% | — | — | $535K | 0.12% | −44 | −5.1% |
| 95 | NKE | NIKE INC | $42.98 | -1.47% | — | — | $515K | 0.11% | +9,758 | NEW |
| 96 | GE | GE AEROSPACE | $328.00 | 0.11% | — | — | $512K | 0.11% | +58 | +3.3% |
| 97 | AAPL | APPLE INC | $307.34 | -1.25% | — | — | $510K | 0.11% | −18 | −0.9% |
| 98 | PG | PROCTER & GAMBLE CO | $146.54 | 4.09% | — | — | $509K | 0.11% | — | HELD |
| 99 | SPG | SIMON PPTY GROUP INC NEW | $210.31 | 1.98% | — | — | $495K | 0.11% | — | HELD |
| 100 | SCHV | SCHWAB STRATEGIC TR | $33.52 | -1.93% | — | — | $478K | 0.11% | — | HELD |
| 101 | O | REALTY INCOME CORP | — | — | — | — | $460K | 0.10% | — | HELD |
| 102 | PSA | PUBLIC STORAGE OPER CO | — | — | — | — | $440K | 0.10% | — | HELD |
| 103 | VCEB | VANGUARD WORLD FD | — | — | — | — | $422K | 0.09% | +140 | +2.1% |
| 104 | JCI | JOHNSON CONTROLS INTERNATION | — | — | — | — | $410K | 0.09% | — | HELD |
| 105 | CL | COLGATE PALMOLIVE CO | — | — | — | — | $409K | 0.09% | — | HELD |
| 106 | ICF | ISHARES TR | — | — | — | — | $395K | 0.09% | — | HELD |
| 107 | EFA | ISHARES TR | — | — | — | — | $360K | 0.08% | — | HELD |
| 108 | IVE | ISHARES TR | — | — | — | — | $352K | 0.08% | — | HELD |
| 109 | IRM | IRON MTN INC DEL | — | — | — | — | $337K | 0.08% | +201 | +6.5% |
| 110 | BNDX | VANGUARD CHARLOTTE FDS | — | — | — | — | $337K | 0.08% | −659 | −8.6% |
| 111 | AMZN | AMAZON COM INC | — | — | — | — | $331K | 0.07% | +1,590 | NEW |
| 112 | HIG | HARTFORD INSURANCE GROUP INC | — | — | — | — | $328K | 0.07% | — | HELD |
| 113 | MSFT | MICROSOFT CORP | — | — | — | — | $324K | 0.07% | +26 | +3.1% |
| 114 | DFCF | DIMENSIONAL ETF TRUST | — | — | — | — | $321K | 0.07% | −16,867 | −69.0% |
| 115 | VIG | VANGUARD SPECIALIZED FUNDS | — | — | — | — | $307K | 0.07% | +42 | +3.0% |
| 116 | VICI | VICI PPTYS INC | — | — | — | — | $303K | 0.07% | — | HELD |
| 117 | DFEV | DIMENSIONAL ETF TRUST | — | — | — | — | $300K | 0.07% | −586 | −6.5% |
| 118 | EXR | EXTRA SPACE STORAGE INC | — | — | — | — | $295K | 0.07% | — | HELD |
| 119 | CCI | CROWN CASTLE INC | — | — | — | — | $294K | 0.07% | −358 | −9.0% |
| 120 | HON | HONEYWELL INTL INC | — | — | — | — | $271K | 0.06% | +1,200 | NEW |
| 121 | VXUS | VANGUARD STAR FDS | — | — | — | — | $269K | 0.06% | +194 | +5.9% |
| 122 | BNDW | VANGUARD SCOTTSDALE FDS | — | — | — | — | $253K | 0.06% | −790 | −17.6% |
| 123 | MDT | MEDTRONIC PLC | — | — | — | — | $249K | 0.06% | — | HELD |
| 124 | XLK | SELECT SECTOR SPDR TR | — | — | — | — | $246K | 0.05% | — | HELD |
| 125 | AVB | AVALONBAY CMNTYS INC | — | — | — | — | $242K | 0.05% | — | HELD |
| 126 | IWC | ISHARES TR | — | — | — | — | $238K | 0.05% | — | HELD |
| 127 | TEL | TE CONNECTIVITY PLC | — | — | — | — | $235K | 0.05% | — | HELD |
| 128 | VT | VANGUARD INTL EQUITY INDEX F | — | — | — | — | $235K | 0.05% | +1,697 | NEW |
| 129 | AMD | ADVANCED MICRO DEVICES INC | — | — | — | — | $231K | 0.05% | +118 | +11.6% |
| 130 | VTC | VANGUARD SCOTTSDALE FDS | — | — | — | — | $231K | 0.05% | +3 | +0.1% |
| 131 | EQR | EQUITY RESIDENTIAL | — | — | — | — | $217K | 0.05% | — | HELD |
| 132 | VCSH | VANGUARD SCOTTSDALE FDS | — | — | — | — | $206K | 0.05% | +2,600 | NEW |
| 133 | CSCO | CISCO SYS INC | — | — | — | — | — | — | −9,567 | EXITED |
| 134 | CAT | CATERPILLAR INC | — | — | — | — | — | — | −1,043 | EXITED |
| 135 | SBAC | SBA COMMUNICATIONS CORP NEW | — | — | — | — | — | — | −1,146 | EXITED |
| 136 | PFE | PFIZER INC | — | — | — | — | — | — | −8,082 | EXITED |
Source: SEC EDGAR · accession 0001369913-26-000002. 13F discloses long positions only — shorts, foreign equities, and options are excluded.