Corundum Trust Company, INC

In its 13F for Q3 2025 (holdings as of September 30, 2025, filed October 24, 2025), Corundum Trust Company, INC reported 127 stock positions worth $46.1 million. Its top holding was 3M (MMM) at 13.6% of the portfolio, followed by iShares Core S&P Small-Cap E (IJR, 8.3%) and iShares Select Dividend ETF (DVY, 5.9%). Compared with Q2 2025, it opened 80 new positions, sold out of 3, added to 1 and reduced 14. The biggest buy was a new position in Greatland Resources (GGPSF) and the biggest sale 3M (MMM, shares −0%).

Most Recent 13F
Q2 2026
Location
SIOUX FALLS, SD
CIK
0001987720
Portfolio Value
$46.1M (Q3 2025)
SEC Filing
0001987720-25-000007 ↗ filed Oct 24, 2025

Holdings Value

0$10.0M$20.0M$30.0M$40.0M$50.0M Q2 2024: $34.4M Q2 2024 Q3 2024: $36.3M Q3 2024 Q4 2024: $33.3M Q4 2024 Q1 2025: $34.7M Q1 2025 Q2 2025: $37.9M Q2 2025 Q3 2025: $46.1M $46.1M Q3 2025 Q4 2025: $43.9M Q4 2025 Q1 2026: $43.8M Q1 2026 Q2 2026: $37.4M Q2 2026

Holdings 127 stocks · $46.1M
MMM 3M Co. 13.61% 40,424 $6.3M Reduce -0.0%
IJR iShares Core S&P Small-Cap E 8.27% 32,098 $3.8M Reduce -0.6%
DVY iShares Select Dividend ETF 5.86% 19,014 $2.7M No change
MSFT Microsoft Corp. 5.43% 4,830 $2.5M Reduce -2.3%
IJK iShares S&P Mid-Cap 400 Grow 4.52% 21,744 $2.1M No change
IVV iShares Core S&P 500 ETF 4.29% 2,957 $2.0M No change
IJJ iShares S&P Mid-Cap 400 Valu 3.70% 13,166 $1.7M No change
AAPL Apple Inc. 3.60% 6,527 $1.7M Reduce -0.2%
GOOG Alphabet Inc. Class C 3.18% 6,027 $1.5M Reduce -0.5%
EFA iShares MSCI Eafe ETF 2.58% 12,726 $1.2M Reduce -0.1%
SKE Skeena Resources Ltd. 2.55% 63,750 $1.2M Reduce -2.3%
SPY SS SPDR S&P 500 ETF Trust-US 2.34% 1,616 $1.1M Reduce -0.8%
DiscoverySilverCorp 2.08% 257,500 $957K No change
LLY Eli Lilly & Co. 1.82% 1,100 $839K Reduce -0.2%
JPM JPMorgan Chase & Co. 1.70% 2,487 $784K Reduce -0.7%
WDOFF Wesdome Gold Mines Ltd. 1.62% 48,000 $748K No change
SOLV Solventum Corp. 1.60% 10,111 $738K No change
GGPSF Greatland Resources Ltd. 1.56% 151,250 $718K New
LUGDF Lundin Gold Inc. 1.54% 11,000 $712K No change
NGEX MINERALS LTD 1.42% 35,000 $653K No change
VTHR Vanguard Russell 3000 1.21% 1,892 $557K No change
CSCO Cisco Systems Inc. 1.16% 7,788 $533K Reduce -0.2%
UNH Unitedhealth Group Inc. 1.12% 1,499 $518K Reduce -0.6%
AYA Aya Gold & Silver Inc. 1.00% 40,000 $463K No change
FNV Franco-Nevada Corp. 0.97% 2,000 $446K No change
AMZN Amazon.com Inc. 0.82% 1,712 $376K Reduce -0.5%
NEM Newmont Corp. 0.73% 4,000 $337K No change
AEM Agnico Eagle Mines Ltd. 0.73% 2,000 $337K No change
C Citigroup Inc. 0.73% 3,315 $336K No change
BRK.B Berkshire Hathaway Inc. Class B 0.72% 659 $331K Reduce -1.1%
UNP Union Pacific Corp. 0.71% 1,382 $327K No change
UGI Ugi Corp. 0.71% 9,773 $325K No change
NESRF Northern Star Resources Ltd. 0.63% 18,500 $291K No change
CAHPF Evolution Mining Ltd. 0.62% 40,000 $284K No change
RUPRF Rupert Resources Ltd. 0.56% 63,500 $260K No change
VZLA Vizsla Silver Corp. 0.56% 60,250 $260K No change
EEM iShares MSCI Emerging Market 0.56% 4,810 $257K No change
KGC Kinross Gold Corp. 0.54% 10,000 $249K No change
TMO Thermo Fisher Scientific Inc. 0.53% 500 $243K No change
OR Or Royalties Inc. 0.52% 6,000 $240K New
SNWGF Snowline Gold Corp. 0.47% 27,000 $216K No change
BA The Boeing Co. 0.41% 886 $191K New
VWO Vanguard Ftse Emerging Marke 0.39% 3,325 $180K New
TFPM Triple Flag Precious Met 0.37% 5,802 $170K New
MRK Merck & Co. Inc. 0.36% 1,963 $165K New
TGT Target Corp. 0.36% 1,829 $164K New
SXGCF Southern Cross Gold Consolid 0.35% 30,000 $160K No change
DIS The Walt Disney Co. filed as DISNEY WALT CO 0.33% 1,343 $154K New
CMCSA Comcast Corp. Class A 0.32% 4,744 $149K New
AG First Majestic Silver Corp. 0.32% 12,000 $147K No change
PSP Invesco Global Listed Privat 0.30% 2,031 $140K New
GMINF G Mining Venture Corp. 0.30% 7,000 $139K New
NVDA Nvidia Corp. 0.27% 663 $124K New
AIRRF Aurion Resources Ltd. 0.27% 156,125 $124K No change
WPM Wheaton Precious Metals Corp. 0.24% 1,000 $112K New
GLD SPDR Gold Shares 0.23% 303 $108K New
HD Home Depot Inc. 0.22% 255 $103K New
META Meta Platforms Inc. Class A 0.21% 135 $99K New
IWM iShares Russell 2000 ETF 0.21% 403 $98K New
PAAS Pan American Silver Corp. 0.21% 2,500 $97K New
IVW iShares S&P 500 Growth ETF 0.21% 800 $97K New
IWB iShares Russell 1000 ETF 0.20% 258 $94K New
FTGC First Trust Global Tactical 0.20% 3,621 $94K New
ONXGF Onyx Gold Corp. 0.20% 75,000 $92K Add +22.6%
RMLRF Ramelius Resources Ltd. 0.20% 34,785 $91K New
OGNNF Orogen Royalties Inc. 0.20% 50,000 $90K New
PREDICTIVE DISCOVERY LTD MELBO 0.18% 300,000 $84K No change
VONV Vanguard Russell 1000 Value 0.18% 907 $81K New
DYLLF Deep Yellow Ltd. 0.17% 62,162 $80K No change
V Visa Inc. Class A 0.16% 213 $73K New
SPLV Invesco S&P 500 Low Volatili 0.16% 988 $73K New
UPS United Parcel Service Class B 0.14% 796 $66K New
ABBV Abbvie Inc. 0.14% 273 $63K New
F Ford Motor Co. filed as FORD MTR CO 0.13% 5,000 $60K New
IWO iShares Russell 2000 Growth 0.13% 185 $59K New
GLGDF Gogold Resources Inc. 0.13% 30,000 $59K No change
CE Celanese Corp. 0.12% 1,361 $57K New
ARGTF Artemis Gold Inc. 0.11% 2,000 $52K New
BYAGF Banyan Gold Corp. 0.11% 100,000 $50K New
WLFFF Wolfden Resources Corp. 0.11% 398,802 $49K No change
PNC PNC Financial Services Group 0.11% 245 $49K New
AMP Ameriprise Financial Inc. 0.11% 100 $49K New
CNL Collective Mining Ltd. 0.09% 3,000 $43K New
VAIAF Vaisala Oyj- A SHS 0.09% 852 $43K New
XLU St Sr Utl SL SE SPDR ETF-Usd 0.09% 473 $41K New
ORCL Oracle Corp. 0.08% 137 $39K New
VOO Vanguard S&P 500 ETF 0.08% 60 $37K New
PG The Procter & Gamble Co. 0.07% 207 $32K New
CME Cme Group Inc. 0.07% 112 $30K New
INTC Intel Corp. 0.06% 872 $29K New
CVS CVS Health Corp. 0.06% 382 $29K New
GS Goldman Sachs Group Inc. 0.06% 36 $29K New
ECL Ecolab Inc. 0.06% 103 $28K New
TDGGF TDG Gold Corp. 0.06% 25,000 $27K New
MDT Medtronic PLC 0.06% 279 $27K New
GILD Gilead Sciences Inc. 0.06% 234 $26K New
DUK Duke Energy Corp. 0.05% 191 $24K New
XOM Exxon Mobil Corp. 0.05% 207 $23K New
BLK BlackRock Inc. 0.05% 20 $23K New
CVX Chevron Corp. 0.05% 150 $23K New
CAT Caterpillar Inc. 0.05% 47 $22K New
PFE Pfizer Inc. 0.05% 878 $22K New
BAC Bank of America Corp. filed as BANK AMERICA CORP 0.05% 428 $22K New
FDMIF Founders Metals Inc. 0.05% 7,000 $21K New
AVB Avalonbay Communities Inc. 0.05% 109 $21K New
BMY Bristol-Myers Squibb Co. 0.04% 451 $20K New
WMT Walmart Inc. 0.04% 197 $20K New
USB US Bancorp 0.04% 360 $17K New
ABT Abbott Laboratories 0.04% 125 $17K New
JNJ Johnson & Johnson 0.04% 90 $17K New
COST Costco Wholesale Corp. 0.04% 18 $17K New
WM Waste Management Inc. 0.04% 75 $17K New
KO The Coca-Cola Co. 0.03% 238 $16K New
XEL Xcel Energy Inc. 0.03% 193 $16K New
CTSH Cognizant Tech Solutions-A 0.03% 230 $15K New
ADP Automatic Data Processing 0.03% 52 $15K New
MA Mastercard Inc. Class A 0.03% 25 $14K New
HON Honeywell International Inc. 0.03% 67 $14K New
GOOGL Alphabet Inc. Class A 0.03% 51 $12K New
MCD McDonald's Corp. 0.03% 39 $12K New
AMGN Amgen Inc. 0.02% 40 $11K New
FDX FedEx Corp. 0.02% 44 $10K New
VZ Verizon Communications Inc. 0.02% 202 $9K New
SPYM Ste STR SPDR PT S&P 500 ETF 0.02% 89 $7K New
LMT Lockheed Martin Corp. 0.01% 12 $6K New
OGN Organon & Co. 0.00% 127 $1K New
VTRS Viatris Inc. 0.00% 24 $238 New

Portfolio Sells Q2 2025 → Q3 2025
MMM 3M Co. Reduce -0.0% 13.61% −2.64
GREATLAND RESOURCES Sold out 0.00% −1.87
MSFT Microsoft Corp. Reduce -2.3% 5.43% −1.06
IJR iShares Core S&P Small-Cap E Reduce -0.6% 8.27% −1.05
OGNRF Orogen Royalties Inc. Sold out 0.00% −0.74
LLY Eli Lilly & Co. Reduce -0.2% 1.82% −0.45
EFA iShares MSCI Eafe ETF Reduce -0.1% 2.58% −0.43
SPY SS SPDR S&P 500 ETF Trust-US Reduce -0.8% 2.34% −0.32
CSCO Cisco Systems Inc. Reduce -0.2% 1.16% −0.27
JPM JPMorgan Chase & Co. Reduce -0.7% 1.70% −0.22
SKE Skeena Resources Ltd. Reduce -2.3% 2.55% −0.19
AMZN Amazon.com Inc. Reduce -0.5% 0.82% −0.18
GYYSF Spartan Resources Ltd./Austra Sold out 0.00% −0.14
BRK.B Berkshire Hathaway Inc. Class B Reduce -1.1% 0.72% −0.14
UNH Unitedhealth Group Inc. Reduce -0.6% 1.12% −0.12
AAPL Apple Inc. Reduce -0.2% 3.60% +0.06
GOOG Alphabet Inc. Class C Reduce -0.5% 3.18% +0.35

Portfolio Buys Q2 2025 → Q3 2025
GGPSF Greatland Resources Ltd. New 1.56% +1.56
OR Or Royalties Inc. New 0.52% +0.52
BA The Boeing Co. New 0.41% +0.41
VWO Vanguard Ftse Emerging Marke New 0.39% +0.39
TFPM Triple Flag Precious Met New 0.37% +0.37
MRK Merck & Co. Inc. New 0.36% +0.36
TGT Target Corp. New 0.36% +0.36
DIS The Walt Disney Co. New 0.33% +0.33
CMCSA Comcast Corp. Class A New 0.32% +0.32
PSP Invesco Global Listed Privat New 0.30% +0.30
GMINF G Mining Venture Corp. New 0.30% +0.30
NVDA Nvidia Corp. New 0.27% +0.27
WPM Wheaton Precious Metals Corp. New 0.24% +0.24
GLD SPDR Gold Shares New 0.23% +0.23
HD Home Depot Inc. New 0.22% +0.22
META Meta Platforms Inc. Class A New 0.21% +0.21
IWM iShares Russell 2000 ETF New 0.21% +0.21
PAAS Pan American Silver Corp. New 0.21% +0.21
IVW iShares S&P 500 Growth ETF New 0.21% +0.21
IWB iShares Russell 1000 ETF New 0.20% +0.20
FTGC First Trust Global Tactical New 0.20% +0.20
RMLRF Ramelius Resources Ltd. New 0.20% +0.20
OGNNF Orogen Royalties Inc. New 0.20% +0.20
VONV Vanguard Russell 1000 Value New 0.18% +0.18
V Visa Inc. Class A New 0.16% +0.16
SPLV Invesco S&P 500 Low Volatili New 0.16% +0.16
UPS United Parcel Service Class B New 0.14% +0.14
ABBV Abbvie Inc. New 0.14% +0.14
F Ford Motor Co. New 0.13% +0.13
IWO iShares Russell 2000 Growth New 0.13% +0.13
CE Celanese Corp. New 0.12% +0.12
ARGTF Artemis Gold Inc. New 0.11% +0.11
BYAGF Banyan Gold Corp. New 0.11% +0.11
PNC PNC Financial Services Group New 0.11% +0.11
AMP Ameriprise Financial Inc. New 0.11% +0.11
CNL Collective Mining Ltd. New 0.09% +0.09
VAIAF Vaisala Oyj- A SHS New 0.09% +0.09
XLU St Sr Utl SL SE SPDR ETF-Usd New 0.09% +0.09
ORCL Oracle Corp. New 0.08% +0.08
VOO Vanguard S&P 500 ETF New 0.08% +0.08
PG The Procter & Gamble Co. New 0.07% +0.07
CME Cme Group Inc. New 0.07% +0.07
INTC Intel Corp. New 0.06% +0.06
CVS CVS Health Corp. New 0.06% +0.06
GS Goldman Sachs Group Inc. New 0.06% +0.06
ECL Ecolab Inc. New 0.06% +0.06
TDGGF TDG Gold Corp. New 0.06% +0.06
MDT Medtronic PLC New 0.06% +0.06
GILD Gilead Sciences Inc. New 0.06% +0.06
DUK Duke Energy Corp. New 0.05% +0.05

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 28$37.4MMMM, IJR, DVY, IJK, IVV
Q1 2026 48$43.8MMMM, IJR, DVY, IJK, IVV
Q4 2025 51$43.9MMMM, IJR, DVY, MSFT, IJK
Q3 2025 127$46.1MMMM, IJR, DVY, MSFT, IJK
Q2 2025 50$37.9MMMM, IJR, DVY, MSFT, IJK
Q1 2025 50$34.7MMMM, IJR, DVY, MSFT, IJK
Q4 2024 49$33.3MMMM, IJR, DVY, MSFT, IJK
Q3 2024 52$36.3MMMM, IJR, DVY, MSFT, IJK
Q2 2024 55$34.4MMMM, IJR, MSFT, AAPL, DVY