Corundum Group, Inc.
Reported holdings as of Q3 2026, from 32 quarterly filings.
Holdings
Download these holdings as CSV
| Security | Ticker | Value | Shares | Weight | Weight change | Held | Change |
|---|---|---|---|---|---|---|---|
| ISHARES TR | IWF | $43.1M | 344,169 | -1.24pp | 32q | +0.7%+$307.3K | |
| ISHARES TR | IWD | $41.5M | 167,207 | -1.12pp | 18q | HELD | |
| 3M CO | MMM | $22.7M | 138,476 | +1.21pp | 32q | +39.3%+$6.4M | |
| ISHARES TR | EFA | $18.7M | 179,588 | -0.17pp | 32q | +8.9%+$1.5M | |
| ISHARES TR | IWO | $12.3M | 34,562 | -0.81pp | 32q | HELD | |
| ISHARES TR | IWN | $10.9M | 51,848 | -0.62pp | 32q | -2.3%-$256.6K | |
| STATE STR SPDR S&P 500 ETF T | SPY | $10.6M | 13,929 | +0.02pp | 32q | +11.1%+$1.1M | |
| ISHARES TR | IWP | $10.6M | 76,679 | -0.54pp | 18q | HELD | |
| APPLE INC | AAPL | $10.4M | 31,139 | +0.63pp | 32q | +27.4%+$2.2M | |
| ISHARES TR | IWS | $10.0M | 62,246 | -0.38pp | 18q | +0.7%+$71.5K | |
| LOCKHEED MARTIN CORP | LMT | $9.7M | 19,057 | -0.32pp | 4q | HELD | |
| MICROSOFT CORP | MSFT | $8.9M | 17,371 | +0.96pp | 32q | +38.9%+$2.5M | |
| ISHARES TR | SUSA | $7.4M | 47,498 | -0.25pp | 20q | -0.9%-$68.2K | |
| LINDE PLC | LIN | $6.6M | 13,914 | -0.40pp | 4q | HELD | |
| VANGUARD SCOTTSDALE FDS | VONV | $5.4M | 49,799 | -0.08pp | 31q | +4.1%+$214.5K | |
| ALPHABET INC | GOOG | $4.9M | 14,256 | +0.28pp | 32q | +49.9%+$1.6M | |
| ISHARES TR | IWB | $4.8M | 11,474 | -0.08pp | 32q | +4.5%+$205.2K | |
| ISHARES TR | IJR | $4.6M | 34,038 | +1.09pp | 32q | +1098.5%+$4.2M | |
| ISHARES TR | IWM | $4.1M | 14,779 | -0.17pp | 32q | +5.5%+$214.8K | |
| NVIDIA CORPORATION | NVDA | $4.1M | 17,941 | +0.04pp | 22q | +2.7%+$106.2K | |
| JPMORGAN CHASE & CO | JPM | $4.1M | 12,361 | +0.12pp | 32q | +25.7%+$835.7K | |
| INTEL CORP | INTC | $3.7M | 31,041 | -0.25pp | 7q | +4.0%+$142.8K | |
| SPDR GOLD TR | GLD | $3.7M | 9,776 | -0.05pp | 22q | +4.0%+$142.8K | |
| SPDR SERIES TRUST | SPYM | $3.7M | 40,963 | flat | 8q | +10.1%+$337.4K | |
| INVESCO EXCH TRADED FD TR II | SPLV | $3.5M | 49,871 | -0.13pp | 32q | +5.4%+$179.7K | |
| ALPHABET INC | GOOGL | $3.4M | 9,809 | -0.15pp | 25q | HELD | |
| ISHARES TR | IVW | $3.3M | 23,110 | +0.03pp | 32q | +13.1%+$380.5K | |
| ELI LILLY & CO | LLY | $3.2M | 2,801 | +0.25pp | 32q | +66.6%+$1.3M | |
| ISHARES TR | IJK | $3.1M | 28,619 | +0.61pp | 32q | +356.8%+$2.5M | |
| EXXONMOBIL HOLDINGS CORP | XOM | $3.1M | 19,213 | +0.06pp | 2q | +2.1%+$63.8K | |
| CISCO SYS INC | CSCO | $3.0M | 28,266 | +0.10pp | 26q | +39.7%+$864.3K | |
| VANGUARD INDEX FDS | VOO | $3.0M | 4,330 | -0.05pp | 25q | +4.3%+$124.8K | |
| ISHARES TR | DVY | $2.9M | 18,840 | - | new | NEW | |
| FIRST TR EXCHANGE TRAD FD VI | FTGC | $2.7M | 89,329 | +0.04pp | 21q | +6.1%+$157.4K | |
| CATERPILLAR INC | CAT | $2.7M | 3,368 | -0.34pp | 28q | +0.9%+$25.1K | |
| ISHARES TR | IVV | $2.5M | 3,318 | - | new | NEW | |
| AMAZON COM INC | AMZN | $2.5M | 9,924 | +0.04pp | 32q | +15.4%+$329.6K | |
| BROADCOM INC | AVGO | $2.4M | 6,801 | -0.13pp | 17q | HELD | |
| VISA INC | V | $2.2M | 6,223 | -0.02pp | 26q | +4.6%+$98.1K | |
| SELECT SECTOR SPDR TR | XLU | $2.2M | 56,576 | -0.13pp | 12q | +6.0%+$126.2K | |
| ABBVIE INC | ABBV | $2.2M | 8,240 | -0.03pp | 26q | +3.0%+$62.8K | |
| JOHNSON & JOHNSON | JNJ | $2.1M | 7,996 | -0.03pp | 32q | +3.1%+$63.8K | |
| NUSHARES ETF TR | NUSC | $2.1M | 43,193 | -0.12pp | 20q | HELD | |
| ISHARES TR | IJH | $1.9M | 26,055 | -0.13pp | 32q | -3.7%-$71.9K | |
| MERCK & CO INC | MRK | $1.9M | 12,829 | +0.08pp | 25q | +19.9%+$308.9K | |
| ISHARES TR | IJJ | $1.8M | 13,166 | - | new | NEW | |
| GOLDMAN SACHS GROUP INC | GS | $1.8M | 1,957 | -0.11pp | 24q | +3.2%+$54.0K | |
| US BANCORP | USB | $1.7M | 29,037 | -0.06pp | 22q | +3.7%+$59.1K | |
| BRISTOL-MYERS SQUIBB CO | BMY | $1.7M | 26,645 | flat | 31q | +3.2%+$51.9K | |
| BERKSHIRE HATHAWAY INC DEL | BRKB | $1.6M | 3,225 | +0.04pp | 32q | +24.6%+$316.7K | |
| AMGEN INC | AMGN | $1.6M | 3,808 | +0.03pp | 25q | +3.5%+$54.8K | |
| ECOLAB INC | ECL | $1.6M | 5,815 | -0.05pp | 32q | +3.0%+$46.4K | |
| SOLVENTUM CORP | SOLV | $1.5M | 17,120 | +0.21pp | 10q | +108.4%+$785.1K | |
| BANK OF AMER CORP | BAC | $1.5M | 27,072 | -0.03pp | 24q | +8.7%+$118.4K | |
| ISHARES TR | IVE | $1.5M | 6,430 | flat | 17q | +11.1%+$146.1K | |
| MASTERCARD INCORPORATED | MA | $1.4M | 2,616 | flat | 28q | +4.3%+$59.6K | |
| META PLATFORMS INC | META | $1.4M | 1,982 | +0.09pp | 2q | +13.6%+$171.9K | |
| COSTCO WHOLESALE CORPORATION | COST | $1.4M | 1,561 | -0.04pp | 20q | +3.6%+$49.2K | |
| WALMART INC | WMT | $1.3M | 12,420 | -0.06pp | 32q | +4.9%+$60.8K | |
| DUKE ENERGY CORP NEW | DUK | $1.3M | 11,299 | -0.06pp | 8q | +6.4%+$77.3K | |
| HOME DEPOT INC | HD | $1.3M | 4,483 | -0.09pp | 32q | +9.3%+$108.4K | |
| WASTE MGMT INC DEL | WM | $1.3M | 6,245 | -0.06pp | 24q | +3.8%+$46.7K | |
| CHEVRON CORPORATION | CVX | $1.3M | 6,218 | +0.05pp | 32q | +5.9%+$70.5K | |
| ORACLE CORP | ORCL | $1.2M | 8,719 | -0.05pp | 25q | +5.0%+$57.4K | |
| AUTOMATIC DATA PROCESSING IN | ADP | $1.2M | 4,511 | +0.02pp | 25q | +3.8%+$42.3K | |
| COCA COLA CO | KO | $1.2M | 13,511 | +0.01pp | 32q | +8.2%+$88.3K | |
| PFIZER INC | PFE | $1.1M | 38,049 | +0.04pp | 32q | +11.0%+$107.9K | |
| BOEING CO | BA | $1.1M | 5,730 | -0.02pp | 2q | +24.3%+$208.4K | |
| ABBOTT LABORATORIES | ABT | $1.0M | 10,492 | +0.01pp | 32q | +7.0%+$68.2K | |
| DISNEY WALT CO | DIS | $1.0M | 9,859 | +0.04pp | 32q | +21.8%+$184.8K | |
| FEDEX CORP | FDX | $1.0M | 3,598 | +0.01pp | 26q | +29.3%+$232.6K | |
| MEDTRONIC PLC | MDT | $988.8K | 11,459 | +0.01pp | 11q | +7.2%+$66.0K | |
| MICRON TECHNOLOGY INC | MU | $958.6K | 900 | -0.10pp | 6q | -13.3%-$147.0K | |
| PROCTER & GAMBLE CO | PG | $920.5K | 6,336 | -0.02pp | 32q | +6.4%+$55.5K | |
| VERIZON COMMUNICATIONS INC | VZ | $899.4K | 19,608 | +0.02pp | 3q | +11.4%+$92.2K | |
| ARISTA NETWORKS INC | ANET | $896.4K | 4,403 | +0.02pp | 8q | +1.1%+$9.6K | |
| MCDONALDS CORP | MCD | $837.6K | 3,627 | -0.05pp | 32q | +6.4%+$50.6K | |
| UNITED PARCEL SVCS INC | UPS | $830.2K | 8,885 | -0.02pp | 3q | +17.0%+$120.7K | |
| XCEL ENERGY INC | XEL | $740.9K | 10,512 | -0.04pp | 24q | +6.1%+$42.4K | |
| UNITEDHEALTH GROUP INC | UNH | $714.7K | 1,947 | - | new | NEW | |
| VANGUARD SCOTTSDALE FDS | VTHR | $634.8K | 1,892 | - | new | NEW | |
| TEXAS INSTRS INC | TXN | $588.2K | 2,100 | -0.03pp | 32q | -1.3%-$7.8K | |
| THERMO FISHER SCIENTIFIC INC | TMO | $548.1K | 812 | - | new | NEW | |
| INVESCO QQQ TR | QQQ | $522.3K | 706 | -0.02pp | 15q | HELD | |
| LEGG MASON ETF INVT | LRGE | $522.2K | 5,767 | -0.02pp | 19q | -9.7%-$56.3K | |
| TAIWAN SEMICONDUCTOR MANUFAC | TSM | $521.4K | 1,143 | -0.03pp | 5q | -2.6%-$14.1K | |
| GE AEROSPACE | GE | $470.6K | 1,507 | -0.05pp | 7q | -2.6%-$12.8K | |
| TARGET CORP | TGT | $467.2K | 2,982 | - | new | NEW | |
| UNION PAC CORP | UNP | $466.2K | 1,713 | - | new | NEW | |
| CITIGROUP INC | C | $440.5K | 3,402 | - | new | NEW | |
| HONEYWELL INTL INC | HON | $423.6K | 2,008 | -0.02pp | 2q | +1.6%+$6.8K | |
| DBX ETF TR | SNPE | $412.2K | 5,894 | -0.01pp | 4q | +0.7%+$2.9K | |
| HONEYWELL AEROSPACE INC | HONA | $357.8K | 2,309 | -0.05pp | 2q | +2.8%+$9.6K | |
| MARVELL TECHNOLOGY INC | MRVL | $350.3K | 1,326 | +0.01pp | 3q | +39.6%+$99.3K | |
| UGI CORP NEW | UGI | $348.6K | 9,773 | - | new | NEW | |
| DANAHER CORP DEL | DHR | $340.7K | 1,538 | flat | 4q | -6.2%-$22.6K | |
| NUSHARES ETF TR | NUDM | $337.0K | 8,487 | -0.01pp | 11q | HELD | |
| DIMENSIONAL ETF TRUST | DFUS | $336.6K | 4,054 | -0.01pp | 3q | HELD | |
| DFA U.S. Targeted Value ETF | DFAT | $326.1K | 4,908 | - | new | NEW | |
| VANGUARD TAX-MANAGED FDS | VEA | $324.7K | 4,598 | +0.02pp | 2q | +50.0%+$108.2K | |
| ISHARES TR | EEM | $321.3K | 4,810 | - | new | NEW | |
| SPOTIFY TECHNOLOGY S A | SPOT | $297.3K | 610 | flat | 3q | +0.7%+$1.9K | |
| INTUITIVE SURGICAL INC | ISRG | $297.2K | 731 | flat | 4q | +17.1%+$43.5K | |
| VANGUARD INDEX FDS | VUG | $295.7K | 3,282 | -0.01pp | 10q | HELD | |
| PALO ALTO NETWORKS INC | PANW | $294.4K | 741 | -0.03pp | 3q | -27.0%-$108.9K | |
| ISHARES TR | QUAL | $288.9K | 1,300 | -0.01pp | 11q | HELD | |
| VANGUARD INTL EQUITY INDEX F | VWO | $277.7K | 4,683 | - | new | NEW | |
| MONOLITHIC PWR SYS INC | MPWR | $273.5K | 203 | +0.01pp | 6q | +26.9%+$57.9K | |
| CADENCE DESIGN SYSTEM INC | CDNS | $266.5K | 807 | -0.02pp | 9q | +1.5%+$4.0K | |
| CINTAS CORP | CTAS | $262.9K | 1,348 | flat | 2q | -3.7%-$10.1K | |
| VANGUARD INDEX FDS | VO | $260.4K | 3,320 | -0.01pp | 12q | HELD | |
| VANGUARD BD INDEX FDS | VUSB | $251.2K | 5,069 | -0.01pp | 7q | HELD | |
| WEST PHARMACEUTICAL SVSC INC | WST | $250.3K | 675 | -0.01pp | 2q | -3.7%-$9.6K | |
| UBER TECHNOLOGIES INC | UBER | $243.8K | 3,559 | -0.01pp | 12q | +3.3%+$7.8K | |
| DIMENSIONAL ETF TRUST | DFUV | $238.2K | 4,331 | -0.01pp | 3q | HELD | |
| VANGUARD ADMIRAL FDS INC | IVOV | $224.1K | 2,097 | - | new | NEW | |
| REPUBLIC SVCS INC | RSG | $222.5K | 1,060 | -0.01pp | 14q | HELD | |
| CHARLES SCHWAB CORP (THE) | SCHW | $220.3K | 2,254 | -0.01pp | 4q | -4.5%-$10.4K | |
| PROGRESSIVE CORP | PGR | $216.8K | 1,046 | -0.02pp | 11q | -17.3%-$45.4K | |
| VAIL RESORTS INC | MTN | $205.8K | 1,500 | -0.01pp | 2q | HELD | |
| SAMSARA INC | IOT | $201.3K | 5,279 | - | new | NEW | |
| FUTUREONE INC | $0 | 100,000 | flat | 2q | HELD |
By sector
Industry comes from the SIC code on each company's own SEC filings, which is self-reported and sometimes out of date. Derivative exposure is counted with the shares. Securities the SEC assigns no industry - funds, trusts, foreign issues - are shown as not classified rather than dropped.
| Sector | Value | Share |
|---|---|---|
| Medical Devices | $25.8M | 6.8% |
| Software & IT Services | $21.4M | 5.6% |
| Biotech & Pharma | $14.8M | 3.9% |
| Computer Hardware | $14.6M | 3.8% |
| Semiconductors & Electronics | $13.4M | 3.5% |
| Autos & Aerospace | $11.6M | 3.0% |
| Funds & ETFs | $10.6M | 2.8% |
| Chemicals | $9.1M | 2.4% |
| Retail & Consumer | $8.0M | 2.1% |
| Banks & Lending | $7.7M | 2.0% |
| Capital Markets | $5.7M | 1.5% |
| Other sectors | $24.3M | 6.4% |
| Not classified | $213.1M | 56.1% |
What the disclosed book did
This is not the fund's return. A 13F shows long US equity positions only, so shorts, bonds, foreign listings, private holdings and cash are all invisible here. What this measures is the quarter's change in value of the positions this manager disclosed, had they been left untouched - the return a reader following the filing would have earned.
| Quarter | Book | Market | Difference | Priced |
|---|---|---|---|---|
| Q3 2026 | -0.0% | +2.1% | -2.1% | 100% |
| Q2 2026 | +12.3% | +14.8% | -2.5% | 100% |
| Q1 2026 | -0.9% | -4.6% | +3.7% | 100% |
| Q4 2025 | +2.2% | +2.4% | -0.2% | 100% |
| Q3 2025 | +7.4% | +7.8% | -0.4% | 100% |
| Q2 2025 | +8.0% | +10.5% | -2.5% | 100% |
| Q1 2025 | -2.2% | -4.6% | +2.4% | 100% |
| Q4 2024 | +0.3% | +2.1% | -1.9% | 100% |
Market is SPY over the same two quarter ends, priced the same way as everything else here - the median across every filer reporting it. It is a large-cap US proxy, so a manager holding small caps or biotech will beat or trail it for reasons that are not skill. Prices are quarter-end to quarter-end and say nothing about the path in between, or about trades opened and closed inside a quarter.
Quarter by quarter
| Quarter | Value | Positions | New | Added | Trimmed | Exited | Top 10 | Days to file |
|---|---|---|---|---|---|---|---|---|
| Q3 2026 | $380.1M | 122 | 15 | 74 | 14 | 5 | 50.2% | 28 |
| Q2 2026 | $337.1M | 112 | 13 | 53 | 25 | 8 | 54.0% | 38 |
| Q1 2026 | $299.2M | 107 | 9 | 59 | 29 | 14 | 54.3% | 20 |
| Q4 2025 | $298.0M | 112 | 16 | 42 | 39 | 6 | 54.8% | 12 |
| Q3 2025 | $243.4M | 102 | 3 | 28 | 41 | 3 | 54.0% | 24 |
| Q2 2025 | $226.2M | 102 | 7 | 37 | 29 | 2 | 54.1% | 21 |
| Q1 2025 | $208.5M | 97 | 4 | 9 | 68 | 6 | 53.1% | 23 |
| Q4 2024 | $267.8M | 99 | 7 | 57 | 22 | 7 | 46.5% | 16 |
| Q3 2024 | $219.2M | 99 | 3 | 7 | 73 | 4 | 54.2% | 21 |
| Q2 2024 | $256.0M | 100 | 4 | 61 | 14 | 1 | 47.3% | 17 |
| Q1 2024 | $207.3M | 97 | 7 | 26 | 43 | 9 | 54.1% | 15 |
| Q4 2023 | $199.4M | 99 | 11 | 30 | 36 | 12 | 52.9% | 24 |
| Q3 2023 | $176.0M | 100 | 0 | 8 | 68 | 14 | 53.1% | 17 |
| Q2 2023 | $200.5M | 114 | 16 | 17 | 50 | 0 | 49.7% | 21 |
| Q1 2023 | $211.4M | 98 | 3 | 53 | 23 | 4 | 45.8% | 24 |
| Q4 2022 | $177.1M | 99 | 5 | 50 | 21 | 11 | 49.4% | 12 |
| Q3 2022 | $159.0M | 105 | 11 | 74 | 5 | 1 | 50.8% | 18 |
| Q2 2022 | $148.0M | 95 | 5 | 67 | 10 | 6 | 51.1% | 25 |
| Q1 2022 | $107.6M | 96 | 10 | 63 | 7 | 15 | 35.6% | 32 |
| Q4 2021 | $153.6M | 101 | 12 | 64 | 10 | 2 | 59.5% | 38 |
| Q3 2021 | $134.9M | 91 | 2 | 44 | 24 | 12 | 63.2% | 33 |
| Q2 2021 | $152.5M | 101 | 13 | 36 | 36 | 1 | 65.4% | 33 |
| Q1 2021 | $128.0M | 89 | 2 | 59 | 15 | 4 | 64.2% | 40 |
| Q4 2020 | $120.0M | 91 | 9 | 53 | 12 | 3 | 65.1% | 34 |
| Q3 2020 | $103.2M | 85 | 26 | 42 | 3 | 1 | 66.6% | 43 |
| Q2 2020 | $83.4M | 60 | 8 | 6 | 32 | 6 | 76.8% | 38 |
| Q1 2020 | $70.3M | 58 | 3 | 12 | 32 | 16 | 76.1% | 37 |
| Q4 2019 | $95.2M | 71 | 8 | 44 | 3 | 1 | 74.0% | 28 |
| Q3 2019 | $86.3M | 64 | 0 | 8 | 5 | 4 | 75.4% | 32 |
| Q2 2019 | $87.0M | 68 | 6 | 33 | 9 | 7 | 74.9% | 33 |
| Q1 2019 | $87.4M | 69 | 8 | 1 | 46 | 13 | 75.9% | 38 |
| Q4 2018 | $108.9M | 74 | 0 | 0 | 0 | 0 | 63.2% | 50 |
Rows marked UNVERIFIED ID, PLACEHOLDER ID, TICKER AS ID or NON-CUSIP ID carry an identifier that is not a valid CUSIP. They are shown because the filer reported that money, but treat the security named with caution - hover the chip for what is wrong with it, and see the methodology.
Held counts consecutive filings in which this manager reported the position, and can reach further back than the quarters listed above: the tabs begin at Q4 2018 because earlier coverage is too sparse to describe a market, but tenure is counted over every filing we hold, some reaching to 2007. A position sold and later rebought starts again from one.
Weight change is the shift in this position's share of the whole book, in percentage points. It is the more useful column: when money flows into or out of a broad fund, almost every holding is bought or sold at once, so added and trimmed largely track flows. A weight that rose while the book shrank is a decision. Both compare with the previous quarter this filer reported, not the previous calendar quarter.