Corundum Group
Corundum Group reported 122 stocks worth $380M in its 13F filing for Q3 2026, filed Oct 28, 2026. Its largest holdings are IWF (11.3%), IWD (10.9%) and MMM (6.0%). Compared with Q2 2026, the fund opened new positions in DVY, IVV and IJJ, added to IWF, MMM and EFA, trimmed IWO, IWN and SUSA and sold out of AJG, DDOG and MDY.
Holdings
| # | Stock | Value | Weight | Shares | Change | Shares, 8 qtrs | Held |
|---|---|---|---|---|---|---|---|
| 1 |  IWF Ishares TR | $43.1M | 11.3% | 344K | +2,453 (+1%) | 8 of 8 | |
| 2 |  IWD Ishares TR | $41.5M | 10.9% | 167K | No change | 8 of 8 | |
| 3 |  MMM 3M Co | $22.7M | 6.0% | 138K | +39K (+39%) | 8 of 8 | |
| 4 |  EFA Ishares TR | $18.7M | 4.9% | 180K | +15K (+9%) | 8 of 8 | |
| 5 |  IWO Ishares TR | $12.3M | 3.3% | 35K | −160 (−0%) | 8 of 8 | |
| 6 |  IWN Ishares TR | $10.9M | 2.9% | 52K | −1,225 (−2%) | 8 of 8 | |
| 7 |  SPY Spdr S&P 500 ETF TR | $10.6M | 2.8% | 14K | +1,392 (+11%) | 8 of 8 | |
| 8 |  IWP Ishares TR | $10.6M | 2.8% | 77K | +362 (+0%) | 8 of 8 | |
| 9 |  AAPL Apple Inc | $10.4M | 2.7% | 31K | +6,688 (+27%) | 8 of 8 | |
| 10 |  IWS Ishares TR | $10M | 2.6% | 62K | +445 (+1%) | 8 of 8 |
Positions at Sep 30, 2026, as reported. Change is against the fund's Q2 2026 filing; weight is the share of the fund's reported stocks.
Sold out
held in Q2 2026, gone in Q3 2026
Reported value
last 8 quartersThe value of the US stocks the fund reported, at quarter end prices. It moves with the market as well as with buying and selling.
Filings for Q3 2026
straight from the SEC| Filed | Form | Quarter | |
|---|---|---|---|
| Oct 28, 2026 | 13F-HR | Q3 2026 | SEC filing ↗ |
Other superinvestors
All hedge fund holdings →Corundum Group 13F FAQ
What does Corundum Group own?
Corundum Group reported 122 stocks worth $380M in its 13F filing for Q3 2026, filed Oct 28, 2026. Its largest holdings are IWF (11.3%), IWD (10.9%) and MMM (6.0%). The table above lists every position in the filing (the top 10 without an account).
What did Corundum Group buy and sell in Q3 2026?
Compared with Q2 2026: 15 new positions, 78 added to, 16 trimmed and 5 sold out. New positions include DVY, IVV and IJJ. It sold all of AJG, DDOG and MDY.
When will Corundum Group file its next 13F?
Holdings as of Dec 31, 2026 are due by Feb 15, 2027. The filing appears on this page within minutes of reaching the SEC.
How much is Corundum Group's portfolio worth?
The Q3 2026 filing reports $380M in US stocks. That leaves out cash, bonds, short positions and most foreign holdings, so the fund's total assets are usually larger.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Holdings come from the fund's SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. The fund may have changed its positions since. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.