Corundum Group, Inc.
CIK 1486083 · View on SEC EDGAR ↗
- Portfolio value
- $337.1M
- Positions
- 112
- As of
- June 30, 2026
#4,826 of 9,443 by 13F value · top 51.1%
Portfolio value QoQ: +12.7% 13F does not disclose cash
- Top 10 holdings weight
- 53.99%
- Top 25 holdings weight
- 74.30%
- Positions above 1%
- 24
- Effective number of positions
- 21.8
Based on 13F long-equity holdings only (cash, bonds, shorts not disclosed)
Turnover Q2 2026: 1.97% Est. buys $42,808,158 · sells $6,272,450
Median holding: 7.0 quarters Tracked Q4 2024–Q2 2026 · 79.4% still held
- New positions
- 12
- Increased
- 62
- Decreased
- 29
- Closed
- 4
On this page
- Sector breakdown How the portfolio splits across market sectors.
- Portfolio Every stock this institution reports holding, from its latest 13F.
- High-conviction bets The holdings this manager is most concentrated in.
- Biggest new bets Brand-new positions opened in the latest quarter.
- Top moves The biggest position increases and decreases this quarter.
- Exited positions Positions the manager fully sold out of last quarter.
Sector breakdown
Technology
5.8%
Industrials
4.8%
Healthcare
2.7%
Retail
1.4%
Financials
1.1%
Materials
0.5%
Consumer Staples
0.3%
Energy
0.3%
Consumer Discretionary
0.3%
Consumer products
0.3%
Logistics & Transportation
0.2%
Communication Services
0.2%
Communications
0.2%
Financial Services
0.1%
Other/Unmapped
81.9%
Full portfolio 112 positions
| Type | Streak | 8Q trend | |||||
|---|---|---|---|---|---|---|---|
| IWF | $42,430,876 | 12.59% | 341,716 | $6,003,950 | Up ×3 | ||
| IWD | $40,535,993 | 12.02% | 167,207 | $5,124,464 | Up ×5 | ||
| EFA | $17,136,980 | 5.08% | 164,969 | $1,357,143 | Up ×5 | ||
| Unknown issuer (CUSIP: 88579y101) | $16,091,102 | 4.77% | 99,383 | $1,691,257 | Up ×3 | ||
| IWO | $13,679,079 | 4.06% | 34,722 | $2,597,193 | Down ×1 | ||
| IWN | $11,739,748 | 3.48% | 53,073 | $1,595,166 | Down ×2 | ||
| IWP | $11,173,572 | 3.31% | 76,317 | $1,501,024 | Up ×3 | ||
| IWS | $10,172,445 | 3.02% | 61,801 | $143,930 | Down ×1 | ||
| LMT Lockheed Martin Corporation Common Stock | $9,702,666 | 2.88% | 19,045 | $-1,807,942 | |||
| Unknown issuer (CUSIP: 78462f103) | $9,362,255 | 2.78% | 12,537 | $1,306,493 | Up ×3 | ||
| SUSA | $7,396,525 | 2.19% | 47,936 | $771,842 | Down ×5 | ||
| Unknown issuer (CUSIP: g54950103) | $7,220,012 | 2.14% | 13,913 | $-644,229 | Down ×2 | ||
| AAPL Apple Inc. - Common Stock | $7,075,248 | 2.10% | 24,451 | $1,108,555 | Up ×3 | ||
| Unknown issuer (CUSIP: 92206c714) | $5,084,382 | 1.51% | 47,826 | $663,510 | Up ×2 | ||
| MSFT Microsoft Corporation - Common Stock | $4,666,480 | 1.38% | 12,510 | $54,532 | Up ×1 | ||
| IWB | $4,496,719 | 1.33% | 10,981 | $673,326 | Up ×5 | ||
| IWM | $4,208,103 | 1.25% | 14,006 | $827,863 | Up ×4 | ||
| INTC Intel Corporation - Common Stock | $4,168,374 | 1.24% | 29,853 | $2,854,536 | Up ×3 | ||
| CAT Caterpillar, Inc. Common Stock | $3,553,571 | 1.05% | 3,337 | $1,173,854 | Down ×1 | ||
| Unknown issuer (CUSIP: 46138e354) | $3,544,418 | 1.05% | 47,322 | $154,672 | Up ×2 | ||
| Unknown issuer (CUSIP: 67066g104) | $3,496,773 | 1.04% | 17,476 | $538,775 | Up ×3 | ||
| Unknown issuer (CUSIP: 02079k305) | $3,489,003 | 1.03% | 9,763 | $709,736 | Up ×1 | ||
| Unknown issuer (CUSIP: 78463v107) | $3,463,140 | 1.03% | 9,401 | $-577,713 | Up ×2 | ||
| Unknown issuer (CUSIP: 02079k107) | $3,360,168 | 1.00% | 9,510 | $786,173 | Up ×2 | ||
| Unknown issuer (CUSIP: 78464a854) | $3,269,488 | 0.97% | 37,204 | $702,413 | Up ×1 | ||
| Unknown issuer (CUSIP: 46625h100) | $3,219,291 | 0.95% | 9,835 | $351,819 | Up ×2 | ||
| VOO | $2,851,635 | 0.85% | 4,152 | $494,898 | Up ×5 | ||
| IVW | $2,810,426 | 0.83% | 20,435 | $491,671 | Down ×2 | ||
| Unknown issuer (CUSIP: 30233q108) | $2,573,207 | 0.76% | 18,821 | Up ×1 | |||
| Unknown issuer (CUSIP: 11135f101) | $2,563,411 | 0.76% | 6,786 | $452,553 | Down ×1 | ||
| Unknown issuer (CUSIP: 81369y886) | $2,420,022 | 0.72% | 53,375 | $36,128 | Up ×4 | ||
| Unknown issuer (CUSIP: 17275r102) | $2,376,921 | 0.71% | 20,236 | $809,758 | Up ×2 | ||
| Unknown issuer (CUSIP: 33739h101) | $2,277,123 | 0.68% | 84,182 | $-111,578 | Up ×2 | ||
| Unknown issuer (CUSIP: 67092p607) | $2,257,682 | 0.67% | 43,317 | $214,256 | Down ×5 | ||
| IJH | $2,086,211 | 0.62% | 27,055 | $218,669 | Down ×5 | ||
| AMZN Amazon.com, Inc. - Common Stock | $2,049,962 | 0.61% | 8,601 | $290,081 | Up ×1 | ||
| Unknown issuer (CUSIP: 92826c839) | $2,041,385 | 0.61% | 5,950 | $256,356 | Up ×2 | ||
| LLY Eli Lilly and Company Common Stock | $2,016,242 | 0.60% | 1,681 | $479,306 | Up ×2 | ||
| Unknown issuer (CUSIP: 00287y109) | $2,013,120 | 0.60% | 8,000 | $261,238 | Down ×2 | ||
| JNJ Johnson & Johnson Common Stock | $1,969,537 | 0.58% | 7,755 | $68,283 | Down ×1 | ||
| Unknown issuer (CUSIP: 38141g104) | $1,918,569 | 0.57% | 1,897 | $322,186 | Up ×2 | ||
| USB U.S. Bancorp Common Stock | $1,691,985 | 0.50% | 28,013 | $245,275 | Up ×2 | ||
| ECL Ecolab Inc. Common Stock | $1,573,032 | 0.47% | 5,646 | $68,689 | Down ×1 | ||
| BMY Bristol-Myers Squibb Company Common Stock | $1,487,345 | 0.44% | 25,813 | $-72,937 | Up ×2 | ||
| HD Home Depot, Inc. (The) Common Stock | $1,446,693 | 0.43% | 4,102 | $113,702 | Up ×2 | ||
| BAC Bank of America Corporation Common Stock | $1,418,631 | 0.42% | 24,897 | $217,529 | Up ×2 | ||
| Unknown issuer (CUSIP: 22160k105) | $1,409,753 | 0.42% | 1,507 | $-63,967 | Up ×1 | ||
| Unknown issuer (CUSIP: 58933y105) | $1,375,335 | 0.41% | 10,703 | $112,531 | Up ×2 | ||
| Unknown issuer (CUSIP: 26441c204) | $1,344,406 | 0.40% | 10,621 | $-65,425 | Down ×1 | ||
| Unknown issuer (CUSIP: 94106l109) | $1,340,846 | 0.40% | 6,016 | $-26,404 | Up ×2 | ||
| WMT Walmart Inc. - Common Stock | $1,340,407 | 0.40% | 11,835 | $-95,487 | Up ×3 | ||
| AMGN Amgen Inc. - Common Stock | $1,331,877 | 0.40% | 3,678 | $52,199 | Up ×2 | ||
| IVE | $1,314,677 | 0.39% | 5,790 | $54,112 | Down ×2 | ||
| BRKB | $1,295,510 | 0.38% | 2,589 | $72,592 | Up ×2 | ||
| Unknown issuer (CUSIP: 57636q104) | $1,288,109 | 0.38% | 2,508 | $48,952 | Up ×2 | ||
| Unknown issuer (CUSIP: 68389x105) | $1,216,512 | 0.36% | 8,301 | $22,126 | Up ×2 | ||
| MU Micron Technology, Inc. - Common Stock | $1,198,153 | 0.36% | 1,038 | $844,097 | Down ×4 | ||
| KO Coca-Cola Company (The) Common Stock | $1,014,656 | 0.30% | 12,485 | $99,318 | Up ×5 | ||
| BA Boeing Company (The) Common Stock | $997,927 | 0.30% | 4,610 | Up ×1 | |||
| Unknown issuer (CUSIP: 30303m102) | $982,941 | 0.29% | 1,745 | ||||
| ADP Automatic Data Processing, Inc. - Common Stock | $973,511 | 0.29% | 4,347 | $101,869 | Up ×2 | ||
| CVX Chevron Corporation Common Stock | $973,508 | 0.29% | 5,873 | $-200,236 | Up ×5 | ||
| MCD McDonald's Corporation Common Stock | $921,216 | 0.27% | 3,408 | $-115,579 | Up ×1 | ||
| ABT Abbott Laboratories Common Stock | $889,433 | 0.26% | 9,802 | $-129,464 | Down ×1 | ||
| PG Procter & Gamble Company (The) Common Stock | $873,095 | 0.26% | 5,954 | $39,821 | Up ×2 | ||
| Unknown issuer (CUSIP: 31428x106) | $871,128 | 0.26% | 2,782 | $-86,284 | Up ×4 | ||
| Unknown issuer (CUSIP: g5960l103) | $836,592 | 0.25% | 10,694 | $-57,029 | Up ×2 | ||
| PFE Pfizer, Inc. Common Stock | $825,077 | 0.24% | 34,264 | $-95,779 | Up ×2 | ||
| UPS United Parcel Service, Inc. Common Stock | $816,208 | 0.24% | 7,593 | $93,457 | Up ×1 | ||
| Unknown issuer (CUSIP: 98389b100) | $795,853 | 0.24% | 9,911 | $34,421 | Up ×5 | ||
| DIS Walt Disney Company (The) Common Stock | $779,350 | 0.23% | 8,097 | $33,162 | Up ×2 | ||
| Unknown issuer (CUSIP: 92343v104) | $745,125 | 0.22% | 17,599 | $-99,319 | Up ×1 | ||
| ANET Arista Networks, Inc. Common Stock | $739,997 | 0.22% | 4,356 | $382,093 | Up ×1 | ||
| IJK | $736,137 | 0.22% | 6,265 | $31,797 | Down ×2 | ||
| TXN Texas Instruments Incorporated - Common Stock | $634,293 | 0.19% | 2,128 | $211,456 | Down ×1 | ||
| Unknown issuer (CUSIP: 83444m101) | $633,710 | 0.19% | 8,214 | $97,336 | |||
| GE GE Aerospace Common Stock | $578,534 | 0.17% | 1,548 | $141,812 | Up ×1 | ||
| TSM Taiwan Semiconductor Manufacturing Company Ltd. | $560,667 | 0.17% | 1,174 | $124,712 | Down ×2 | ||
| LRGE ClearBridge Large Cap Growth Select ETF | $547,281 | 0.16% | 6,389 | $66,828 | |||
| Unknown issuer (CUSIP: 46090e103) | $519,898 | 0.15% | 706 | $112,409 | |||
| Unknown issuer (CUSIP: 43849r105) | $496,767 | 0.15% | 2,247 | Up ×1 | |||
| Unknown issuer (CUSIP: 438516205) | $442,426 | 0.13% | 1,976 | Up ×1 | |||
| IJR | $421,200 | 0.12% | 2,840 | $-490,490 | Down ×3 | ||
| SNPE | $402,969 | 0.12% | 5,852 | $57,639 | Up ×1 | ||
| PANW Palo Alto Networks, Inc. - Common Stock | $346,135 | 0.10% | 1,015 | $127,138 | Down ×1 | ||
| Unknown issuer (CUSIP: 25434v609) | $343,069 | 0.10% | 4,908 | $-36,689 | Down ×1 | ||
| Unknown issuer (CUSIP: 67092p805) | $338,409 | 0.10% | 8,456 | $35,266 | Up ×4 | ||
| Unknown issuer (CUSIP: 25434v401) | $332,185 | 0.10% | 4,054 | $44,716 | |||
| DHR Danaher Corporation Common Stock | $312,387 | 0.09% | 1,640 | $14,146 | Up ×2 | ||
| CDNS Cadence Design Systems, Inc. - Common Stock | $298,379 | 0.09% | 795 | $73,582 | Down ×2 | ||
| Unknown issuer (CUSIP: 46432f339) | $285,259 | 0.08% | 1,300 | $35,906 | |||
| MRVL Marvell Technology, Inc. - Common Stock | $282,995 | 0.08% | 950 | $65,679 | Down ×1 | ||
| VUG | $282,711 | 0.08% | 3,282 | $43,787 | Up ×1 | ||
| Unknown issuer (CUSIP: l8681t102) | $278,233 | 0.08% | 606 | $42,082 | Up ×1 | ||
| PGR Progressive Corporation (The) Common Stock | $276,339 | 0.08% | 1,265 | $23,583 | Down ×2 | ||
| VO | $267,492 | 0.08% | 3,320 | $29,133 | Up ×1 | ||
| Unknown issuer (CUSIP: 92203c303) | $252,335 | 0.07% | 5,069 | $-25 | |||
| WST West Pharmaceutical Services, Inc. Common Stock | $251,659 | 0.07% | 701 | ||||
| Unknown issuer (CUSIP: 90353t100) | $248,591 | 0.07% | 3,445 | $24,097 | Up ×3 | ||
| Unknown issuer (CUSIP: 46120e602) | $248,152 | 0.07% | 624 | $-15,073 | Up ×2 | ||
| No matches | |||||||
Conviction holdings
Positions increased for 3+ consecutive quarters.
Share counts are as reported in 13F filings (not split-adjusted)
| Security | Value | % of portfolio | Streak |
|---|---|---|---|
| IWF | $42,430,876 | 12.59% | up ×3 |
| IWD | $40,535,993 | 12.02% | up ×5 |
| EFA | $17,136,980 | 5.08% | up ×5 |
| None | $16,091,102 | 4.77% | up ×3 |
| IWP | $11,173,572 | 3.31% | up ×3 |
| None | $9,362,255 | 2.78% | up ×3 |
| AAPL | $7,075,248 | 2.10% | up ×3 |
| IWB | $4,496,719 | 1.33% | up ×5 |
| IWM | $4,208,103 | 1.25% | up ×4 |
| INTC | $4,168,374 | 1.24% | up ×3 |
| None | $3,496,773 | 1.04% | up ×3 |
| VOO | $2,851,635 | 0.85% | up ×5 |
| None | $2,420,022 | 0.72% | up ×4 |
| WMT | $1,340,407 | 0.40% | up ×3 |
| KO | $1,014,656 | 0.30% | up ×5 |
Biggest new bets
New positions opened this quarter, largest first.
| Security | Value | Shares | % of portfolio |
|---|---|---|---|
| Unknown issuer (CUSIP: 30233q108) | $2,573,207 | 18,821 | 0.76% |
| BA | $997,927 | 4,610 | 0.30% |
| Unknown issuer (CUSIP: 30303m102) | $982,941 | 1,745 | 0.29% |
| Unknown issuer (CUSIP: 43849r105) | $496,767 | 2,247 | 0.15% |
| Unknown issuer (CUSIP: 438516205) | $442,426 | 1,976 | 0.13% |
| WST | $251,659 | 701 | 0.07% |
| CTAS | $238,112 | 1,400 | 0.07% |
| Unknown issuer (CUSIP: 23804l103) | $233,803 | 898 | 0.07% |
| VEA | $218,381 | 3,065 | 0.06% |
| Unknown issuer (CUSIP: 78467y107) | $211,002 | 300 | 0.06% |
| Unknown issuer (CUSIP: 91879q109) | $204,225 | 1,500 | 0.06% |
| Unknown issuer (CUSIP: 314352105) | $202,340 | 1,340 | 0.06% |
Top movers (QoQ)
| Security | Action | Shares Δ | Value Δ |
|---|---|---|---|
| IWF | Bought more | +256K | +$6.0M |
| IWD | Bought more | +1K | +$5.1M |
| INTC | Bought more | +81 | +$2.9M |
| IWO | Trimmed | -592 | +$2.6M |
| LMT | Price move only | +0 | -$1.8M |
| — | Bought more | +231 | +$1.7M |
| IWN | Trimmed | -435 | +$1.6M |
| IWP | Bought more | +821 | +$1.5M |
| EFA | Bought more | +3K | +$1.4M |
| — | Bought more | +150 | +$1.3M |
Exited positions
Includes corporate events (mergers, delistings) — not all exits are sells
Closed positions reflect 13F reporting changes; for index managers these are often mechanical (delisting, M&A, index rebalancing), not active decisions.
| Security | Quarter | Shares before | Value before | Price since exit |
|---|---|---|---|---|
| IVV | March 31, 2025 | 2,960 | $1,742,493 | No longer tracked |
| IVV | March 31, 2026 | 1,618 | $1,108,233 | No longer tracked |
| HON | June 30, 2026 | 3,723 | $841,510 | -1.2% |
| PH | March 31, 2026 | 696 | $611,756 | 13.9% |
| CLX | March 31, 2026 | 6,000 | $604,980 | 4.5% |
| UPS | Dec. 31, 2025 | 5,965 | $498,256 | 3.0% |
| TSCO | June 30, 2026 | 7,925 | $359,002 | 10.4% |
| TJX | March 31, 2026 | 2,303 | $353,764 | -11.2% |
| MRVL | March 31, 2025 | 2,816 | $311,027 | 295.1% |
| FISV | Dec. 31, 2025 | 2,400 | $309,432 | -23.5% |
| UNP | June 30, 2025 | 1,272 | $300,497 | 31.1% |
| IWV | March 31, 2025 | 745 | $249,016 | No longer tracked |
| GD | March 31, 2026 | 708 | $238,355 | 14.1% |
| WST | March 31, 2026 | 851 | $234,144 | 41.2% |
| TMO | Sept. 30, 2025 | 549 | $222,598 | 27.8% |
| MRVL | Sept. 30, 2025 | 2,792 | $216,101 | 189.3% |
| MCHP | Dec. 31, 2025 | 3,351 | $215,201 | 19.6% |
| AJG | June 30, 2025 | 611 | $210,942 | -18.6% |
| IJT | June 30, 2026 | 1,450 | $209,829 | |
| INTU | June 30, 2026 | 478 | $206,678 | 38.7% |
| URTH | March 31, 2025 | 1,326 | $206,193 | No longer tracked |
| VOT | March 31, 2025 | 795 | $201,731 | No longer tracked |