Corundum Group, Inc.
Reported holdings as of Q2 2026, from 31 quarterly filings.
This filer last reported in Q2 2026; the most recent quarter on file across all filers is Q3 2026. Firms that restructure stop filing under one CIK and start under another, so a successor entity may hold these positions now under a similar name.
Holdings
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| Security | Ticker | Value | Shares | Weight | Weight change | Held | Change |
|---|---|---|---|---|---|---|---|
| ISHARES TR | IWF | $42.4M | 341,716 | +0.41pp | 31q | +300.0%+$31.8M | |
| ISHARES TR | IWD | $40.5M | 167,207 | +0.19pp | 17q | +0.9%+$358.1K | |
| ISHARES TR | EFA | $17.1M | 164,969 | -0.19pp | 31q | +1.5%+$260.5K | |
| 3M CO | MMM | $16.1M | 99,383 | -0.04pp | 31q | HELD | |
| ISHARES TR | IWO | $13.7M | 34,722 | +0.35pp | 31q | -1.7%-$233.2K | |
| ISHARES TR | IWN | $11.7M | 53,073 | +0.09pp | 31q | -0.8%-$96.2K | |
| ISHARES TR | IWP | $11.2M | 76,317 | +0.08pp | 17q | +1.1%+$120.2K | |
| ISHARES TR | IWS | $10.2M | 61,801 | -0.33pp | 17q | -10.2%-$1.2M | |
| LOCKHEED MARTIN CORP | LMT | $9.7M | 19,045 | -0.97pp | 3q | HELD | |
| STATE STR SPDR S&P 500 ETF T | SPY | $9.4M | 12,537 | +0.08pp | 31q | +1.2%+$112.0K | |
| ISHARES TR | SUSA | $7.4M | 47,936 | -0.02pp | 19q | -4.4%-$341.5K | |
| LINDE PLC | LIN | $7.2M | 13,913 | -0.49pp | 3q | -12.3%-$1.0M | |
| APPLE INC | AAPL | $7.1M | 24,451 | +0.10pp | 31q | +4.0%+$272.3K | |
| VANGUARD SCOTTSDALE FDS | VONV | $5.1M | 47,826 | +0.03pp | 30q | +1.4%+$70.7K | |
| MICROSOFT CORP | MSFT | $4.7M | 12,510 | -0.16pp | 31q | HELD | |
| ISHARES TR | IWB | $4.5M | 10,981 | +0.06pp | 31q | +2.4%+$105.7K | |
| ISHARES TR | IWM | $4.2M | 14,006 | +0.12pp | 31q | +2.8%+$113.0K | |
| INTEL CORP | INTC | $4.2M | 29,853 | +0.80pp | 6q | HELD | |
| CATERPILLAR INC | CAT | $3.6M | 3,337 | +0.26pp | 27q | -0.7%-$23.4K | |
| INVESCO EXCH TRADED FD TR II | SPLV | $3.5M | 47,322 | -0.08pp | 31q | +2.1%+$73.1K | |
| NVIDIA CORPORATION | NVDA | $3.5M | 17,476 | +0.05pp | 21q | +3.0%+$103.0K | |
| ALPHABET INC | GOOGL | $3.5M | 9,763 | +0.11pp | 24q | +1.0%+$35.0K | |
| SPDR GOLD TR | GLD | $3.5M | 9,401 | -0.32pp | 21q | HELD | |
| ALPHABET INC | GOOG | $3.4M | 9,510 | +0.14pp | 31q | +6.0%+$189.7K | |
| SPDR SERIES TRUST | SPYM | $3.3M | 37,204 | +0.11pp | 7q | +10.9%+$322.1K | |
| JPMORGAN CHASE & CO | JPM | $3.2M | 9,835 | flat | 31q | +0.9%+$28.5K | |
| VANGUARD INDEX FDS | VOO | $2.9M | 4,152 | +0.06pp | 24q | +5.3%+$142.9K | |
| ISHARES TR | IVW | $2.8M | 20,435 | +0.06pp | 31q | HELD | |
| EXXONMOBIL HOLDINGS CORP COM SHS | XOM | $2.6M | 18,821 | - | new | NEW | |
| BROADCOM INC | AVGO | $2.6M | 6,786 | +0.05pp | 16q | HELD | |
| SELECT SECTOR SPDR TR | XLU | $2.4M | 53,375 | -0.08pp | 11q | +2.7%+$64.7K | |
| CISCO SYS INC | CSCO | $2.4M | 20,236 | +0.18pp | 25q | HELD | |
| FIRST TR EXCHANGE TRAD FD VI | FTGC | $2.3M | 84,182 | -0.12pp | 20q | +1.2%+$26.5K | |
| NUSHARES ETF TR | NUSC | $2.3M | 43,317 | -0.01pp | 19q | -4.5%-$105.9K | |
| ISHARES TR | IJH | $2.1M | 27,055 | -0.01pp | 31q | -2.2%-$46.3K | |
| AMAZON COM INC | AMZN | $2.0M | 8,601 | +0.02pp | 31q | +1.8%+$36.0K | |
| VISA INC | V | $2.0M | 5,950 | +0.01pp | 25q | +0.7%+$15.1K | |
| ELI LILLY & CO | LLY | $2.0M | 1,681 | +0.08pp | 31q | +0.6%+$12.0K | |
| ABBVIE INC | ABBV | $2.0M | 8,000 | +0.01pp | 25q | -0.7%-$13.8K | |
| JOHNSON & JOHNSON | JNJ | $2.0M | 7,755 | -0.05pp | 31q | HELD | |
| GOLDMAN SACHS GROUP INC | GS | $1.9M | 1,897 | +0.04pp | 23q | +0.5%+$10.1K | |
| US BANCORP | USB | $1.7M | 28,013 | +0.02pp | 21q | +0.7%+$11.9K | |
| ECOLAB INC | ECL | $1.6M | 5,646 | -0.04pp | 31q | HELD | |
| BRISTOL-MYERS SQUIBB CO | BMY | $1.5M | 25,813 | -0.08pp | 30q | HELD | |
| HOME DEPOT INC | HD | $1.4M | 4,102 | -0.02pp | 31q | +1.2%+$17.3K | |
| BANK OF AMER CORP | BAC | $1.4M | 24,897 | +0.02pp | 23q | +1.1%+$14.8K | |
| COSTCO WHOLESALE CORPORATION | COST | $1.4M | 1,507 | -0.07pp | 19q | +1.9%+$26.2K | |
| MERCK & CO INC | MRK | $1.4M | 10,703 | -0.01pp | 24q | +2.0%+$26.3K | |
| DUKE ENERGY CORP NEW | DUK | $1.3M | 10,621 | -0.07pp | 7q | -1.4%-$18.5K | |
| WASTE MGMT INC DEL | WM | $1.3M | 6,016 | -0.06pp | 23q | +1.1%+$14.7K | |
| WALMART INC | WMT | $1.3M | 11,835 | -0.08pp | 31q | +2.4%+$31.8K | |
| AMGEN INC | AMGN | $1.3M | 3,678 | -0.03pp | 24q | +1.1%+$14.8K | |
| ISHARES TR | IVE | $1.3M | 5,790 | -0.03pp | 16q | -3.0%-$40.9K | |
| BERKSHIRE HATHAWAY INC DEL | BRKB | $1.3M | 2,589 | -0.02pp | 31q | +1.4%+$18.5K | |
| MASTERCARD INCORPORATED | MA | $1.3M | 2,508 | -0.03pp | 27q | +1.1%+$14.4K | |
| ORACLE CORP | ORCL | $1.2M | 8,301 | -0.04pp | 24q | +2.2%+$26.7K | |
| MICRON TECHNOLOGY INC | MU | $1.2M | 1,038 | +0.24pp | 5q | -1.0%-$11.5K | |
| COCA COLA CO | KO | $1.0M | 12,485 | flat | 31q | +3.7%+$36.5K | |
| BOEING CO | BA | $997.9K | 4,610 | - | new | NEW | |
| META PLATFORMS INC | META | $982.9K | 1,745 | - | new | NEW | |
| AUTOMATIC DATA PROCESSING IN | ADP | $973.5K | 4,347 | flat | 24q | +1.3%+$12.8K | |
| CHEVRON CORPORATION | CVX | $973.5K | 5,873 | -0.10pp | 31q | +3.5%+$33.2K | |
| MCDONALDS CORP | MCD | $921.2K | 3,408 | -0.07pp | 31q | +2.2%+$19.5K | |
| ABBOTT LABORATORIES | ABT | $889.4K | 9,802 | -0.08pp | 31q | -1.2%-$11.1K | |
| PROCTER & GAMBLE CO | PG | $873.1K | 5,954 | -0.02pp | 31q | +3.2%+$27.1K | |
| FEDEX CORP | FDX | $871.1K | 2,782 | -0.06pp | 25q | +3.5%+$29.4K | |
| MEDTRONIC PLC | MDT | $836.6K | 10,694 | -0.05pp | 10q | +3.7%+$29.8K | |
| PFIZER INC | PFE | $825.1K | 34,264 | -0.06pp | 31q | +4.5%+$35.4K | |
| UNITED PARCEL SVCS INC | UPS | $816.2K | 7,593 | flat | 2q | +3.3%+$26.4K | |
| XCEL ENERGY INC | XEL | $795.9K | 9,911 | -0.02pp | 23q | +3.4%+$26.2K | |
| DISNEY WALT CO | DIS | $779.4K | 8,097 | -0.02pp | 31q | +4.6%+$34.2K | |
| VERIZON COMMUNICATIONS INC | VZ | $745.1K | 17,599 | -0.06pp | 2q | +4.6%+$32.9K | |
| ARISTA NETWORKS INC | ANET | $740.0K | 4,356 | +0.10pp | 7q | +49.4%+$244.8K | |
| ISHARES TR | IJK | $736.1K | 6,265 | -0.02pp | 31q | -10.5%-$86.4K | |
| TEXAS INSTRS INC | TXN | $634.3K | 2,128 | +0.05pp | 31q | -2.3%-$14.9K | |
| SOLVENTUM CORP | SOLV | $633.7K | 8,214 | +0.01pp | 9q | HELD | |
| GE AEROSPACE | GE | $578.5K | 1,548 | +0.03pp | 6q | +0.6%+$3.4K | |
| TAIWAN SEMICONDUCTOR MANUFAC | TSM | $560.7K | 1,174 | +0.02pp | 4q | -9.0%-$55.4K | |
| LEGG MASON ETF INVT | LRGE | $547.3K | 6,389 | flat | 18q | HELD | |
| INVESCO QQQ TR | QQQ | $519.9K | 706 | +0.02pp | 14q | HELD | |
| HONEYWELL AEROSPACE INC | HONA | $496.8K | 2,247 | - | new | NEW | |
| HONEYWELL INTL INC | HON | $442.4K | 1,976 | - | new | NEW | |
| ISHARES TR | IJR | $421.2K | 2,840 | -0.18pp | 31q | -61.3%-$666.5K | |
| DBX ETF TR | SNPE | $403.0K | 5,852 | flat | 3q | +0.9%+$3.6K | |
| PALO ALTO NETWORKS INC | PANW | $346.1K | 1,015 | +0.03pp | 2q | -25.7%-$119.7K | |
| DIMENSIONAL ETF TRUST | DFAT | $343.1K | 4,908 | -0.03pp | 2q | -19.3%-$82.0K | |
| NUSHARES ETF TR | NUDM | $338.4K | 8,456 | flat | 10q | +0.7%+$2.4K | |
| DIMENSIONAL ETF TRUST | DFUS | $332.2K | 4,054 | flat | 2q | HELD | |
| DANAHER CORP DEL | DHR | $312.4K | 1,640 | -0.01pp | 3q | +4.3%+$12.8K | |
| CADENCE DESIGN SYSTEM INC | CDNS | $298.4K | 795 | +0.01pp | 8q | -1.7%-$5.3K | |
| ISHARES TR | QUAL | $285.3K | 1,300 | flat | 10q | HELD | |
| MARVELL TECHNOLOGY INC | MRVL | $283.0K | 950 | +0.01pp | 2q | -56.7%-$370.6K | |
| VANGUARD INDEX FDS | VUG | $282.7K | 3,282 | flat | 9q | +500.0%+$235.6K | |
| SPOTIFY TECHNOLOGY S A | SPOT | $278.2K | 606 | flat | 2q | +24.4%+$54.6K | |
| PROGRESSIVE CORP | PGR | $276.3K | 1,265 | flat | 10q | -0.8%-$2.2K | |
| VANGUARD INDEX FDS | VO | $267.5K | 3,320 | flat | 11q | +300.0%+$200.6K | |
| VANGUARD BD INDEX FDS | VUSB | $252.3K | 5,069 | -0.01pp | 6q | HELD | |
| WEST PHARMACEUTICAL SVSC INC | WST | $251.7K | 701 | - | new | NEW | |
| UBER TECHNOLOGIES INC | UBER | $248.6K | 3,445 | flat | 11q | +10.4%+$23.4K | |
| INTUITIVE SURGICAL INC | ISRG | $248.2K | 624 | -0.01pp | 3q | +9.3%+$21.1K | |
| GALLAGHER ARTHUR J & CO | AJG | $247.7K | 1,079 | -0.01pp | 4q | -2.4%-$6.0K | |
| DIMENSIONAL ETF TRUST | DFUV | $238.2K | 4,331 | flat | 2q | HELD | |
| CINTAS CORP | CTAS | $238.1K | 1,400 | - | new | NEW | |
| DATADOG INC | DDOG | $233.8K | 898 | - | new | NEW | |
| REPUBLIC SVCS INC | RSG | $226.1K | 1,061 | -0.01pp | 13q | -0.8%-$1.9K | |
| MONOLITHIC PWR SYS INC | MPWR | $221.2K | 160 | -0.02pp | 5q | -32.5%-$106.4K | |
| VANGUARD TAX-MANAGED FDS | VEA | $218.4K | 3,065 | - | new | NEW | |
| SCHWAB CHARLES CORP | SCHW | $217.8K | 2,360 | flat | 3q | +8.5%+$17.1K | |
| STATE STR SPDR S&P MIDCAP 40 | MDY | $211.0K | 300 | - | new | NEW | |
| VAIL RESORTS INC | MTN | $204.2K | 1,500 | - | new | NEW | |
| FEDEX FGHT HLDG CO INC | $202.3K | 1,340 | - | new | NEW | ||
| 36114M108 | $0 | 100,000 | - | new | NEW |
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 | $18.1M | 5.4% |
| Software & IT Services | $15.2M | 4.5% |
| Semiconductors & Electronics | $13.7M | 4.1% |
| Biotech & Pharma | $11.9M | 3.5% |
| Autos & Aerospace | $10.7M | 3.2% |
| Computer Hardware | $10.5M | 3.1% |
| Funds & ETFs | $10.1M | 3.0% |
| Chemicals | $9.7M | 2.9% |
| Retail & Consumer | $7.4M | 2.2% |
| Banks & Lending | $6.3M | 1.9% |
| Capital Markets | $5.6M | 1.7% |
| Other sectors | $21.2M | 6.3% |
| Not classified | $196.7M | 58.3% |
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 |
|---|---|---|---|---|
| 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% |
| Q3 2024 | +7.2% | +5.4% | +1.7% | 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 |
|---|---|---|---|---|---|---|---|---|
| Q2 2026 | $337.1M | 112 | 13 | 56 | 25 | 8 | 54.0% | 38 |
| Q1 2026 | $299.2M | 107 | 9 | 59 | 29 | 14 | 54.3% | 20 |
| Q4 2025 | $298.0M | 112 | 16 | 43 | 38 | 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 | 58 | 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 | 28 | 42 | 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 | 75 | 4 | 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 | 56 | 11 | 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.