Corundum Trust Company, INC

In its 13F for Q1 2025 (holdings as of March 31, 2025, filed April 24, 2025), Corundum Trust Company, INC reported 50 stock positions worth $34.7 million. Its top holding was 3M (MMM) at 17.1% of the portfolio, followed by iShares Core S&P Small-Cap E (IJR, 10.0%) and iShares Select Dividend ETF (DVY, 7.4%). Compared with Q4 2024, it opened 5 new positions, sold out of 4, added to 8 and reduced 6. The biggest buy was SS SPDR S&P 500 ETF Trust-US (SPY, shares +146%) and the biggest sale Apple (AAPL, shares −15%).

Most Recent 13F
Q2 2026
Location
SIOUX FALLS, SD
CIK
0001987720
Portfolio Value
$34.7M (Q1 2025)
SEC Filing
0001987720-25-000004 ↗ filed Apr 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 $34.7M Q1 2025 Q2 2025: $37.9M Q2 2025 Q3 2025: $46.1M Q3 2025 Q4 2025: $43.9M Q4 2025 Q1 2026: $43.8M Q1 2026 Q2 2026: $37.4M Q2 2026

Holdings 50 stocks · $34.7M

MMM 3M Co. 17.11% 40,429 $5.9M Reduce -0.2%
IJR iShares Core S&P Small-Cap E 10.03% 33,290 $3.5M Add +5.7%
DVY iShares Select Dividend ETF 7.36% 19,014 $2.6M No change
MSFT Microsoft Corp. 5.65% 5,226 $2.0M Reduce -8.2%
IJK iShares S&P Mid-Cap 400 Grow 5.22% 21,744 $1.8M No change
IVV iShares Core S&P 500 ETF 4.79% 2,957 $1.7M No change
IJJ iShares S&P Mid-Cap 400 Valu 4.54% 13,166 $1.6M No change
AAPL Apple Inc. 4.19% 6,546 $1.5M Reduce -15.4%
EFA iShares MSCI Eafe ETF 3.00% 12,735 $1.0M Add +0.9%
GOOG Alphabet Inc. Class C 2.73% 6,059 $947K Reduce -4.0%
LLY Eli Lilly & Co. 2.73% 1,145 $946K Reduce -2.8%
SPY SS SPDR S&P 500 ETF Trust-US 2.63% 1,631 $912K Add +146.4%
UNH Unitedhealth Group Inc. 2.45% 1,620 $848K Add +1.0%
SOLV Solventum Corp. 2.22% 10,111 $769K No change
SKE Skeena Resources Ltd. 1.90% 65,250 $658K No change
JPM JPMorgan Chase & Co. 1.77% 2,505 $614K Add +1.9%
WDOFF Wesdome Gold Mines Ltd. 1.65% 48,000 $572K No change
OGNRF Orogen Royalties Inc. 1.63% 523,500 $565K No change
CSCO Cisco Systems Inc. 1.39% 7,808 $482K Add +1.8%
VTHR Vanguard Russell 3000 1.35% 1,892 $467K No change
GREATLAND GOLD 1.34% 3,000,000 $464K No change
MAG Mag Silver Corp. 1.24% 28,150 $430K No change
UGI Ugi Corp. 1.08% 11,373 $376K New
BRK.B Berkshire Hathaway Inc. Class B 1.02% 667 $355K Add +3.7%
AMZN Amazon.com Inc. 0.94% 1,722 $328K Add +2.6%
UNP Union Pacific Corp. 0.94% 1,382 $326K No change
FNV Franco-Nevada Corp. 0.91% 2,000 $315K No change
NGEX MINERALS LTD 0.79% 30,000 $273K No change
TMO Thermo Fisher Scientific Inc. 0.72% 500 $249K No change
C Citigroup Inc. 0.68% 3,315 $235K No change
AEM Agnico Eagle Mines Ltd. 0.62% 2,000 $217K New
NESRF Northern Star Resources Ltd. filed as NTHN STAR RES LTD NPV 0.62% 18,500 $214K No change
EEM iShares MSCI Emerging Market 0.61% 4,810 $210K No change
CAHPF Evolution Mining Ltd. 0.53% 40,000 $184K No change
RUPRF Rupert Resources Ltd. 0.53% 63,500 $182K No change
SNWGF Snowline Gold Corp. 0.43% 25,000 $150K No change
VZLA Vizsla Silver Corp. 0.39% 60,250 $137K No change
KGC Kinross Gold Corp. 0.36% 10,000 $126K No change
AYA Aya Gold & Silver Inc. 0.33% 15,000 $116K No change
DiscoverySilverCorp 0.23% 55,000 $81K New
AG First Majestic Silver Corp. 0.23% 12,000 $80K No change
AIRRF Aurion Resources Ltd. 0.22% 156,125 $77K No change
DYLLF Deep Yellow Ltd. 0.21% 112,162 $73K Reduce -30.8%
PREDICTIVE DISCOVERY LTD MELBO 0.18% 300,000 $62K No change
SXGCF Southern Cross Gold Consolid 0.17% 20,000 $60K New
GUYGF G2 Goldfields Inc. 0.16% 25,000 $56K New
GYYSF Spartan Resources Ltd./Austra 0.11% 40,000 $38K No change
WLFFF Wolfden Resources Corp. 0.05% 398,802 $18K No change
BEMETALS CORP COM 0.01% 132,567 $4K No change
BRKCF Barksdale Resources Corp. 0.01% 50,000 $4K No change

Portfolio Sells Q4 2024 → Q1 2025

AAPL Apple Inc. Reduce -15.4% 4.19% −1.63
MSFT Microsoft Corp. Reduce -8.2% 5.65% −1.55
GOOG Alphabet Inc. Class C Reduce -4.0% 2.73% −0.88
TGT Target Corp. Sold out 0.00% −0.72
SXGDF Southern Cross Gold Ltd. Sold out 0.00% −0.16
DYLLF Deep Yellow Ltd. Reduce -30.8% 0.21% −0.14
ERLFF Entree Resources Ltd. Sold out 0.00% −0.08
BYAGF Banyan Gold Corp. Sold out 0.00% −0.04
LLY Eli Lilly & Co. Reduce -2.8% 2.73% −0.00
MMM 3M Co. Reduce -0.2% 17.11% +1.41

Portfolio Buys Q4 2024 → Q1 2025

SPY SS SPDR S&P 500 ETF Trust-US Add +146.4% 2.63% +1.46
UGI Ugi Corp. New 1.08% +1.08
AEM Agnico Eagle Mines Ltd. New 0.62% +0.62
DiscoverySilverCorp New 0.23% +0.23
SXGCF Southern Cross Gold Consolid New 0.17% +0.17
GUYGF G2 Goldfields Inc. New 0.16% +0.16
BRK.B Berkshire Hathaway Inc. Class B Add +3.7% 1.02% +0.15
EFA iShares MSCI Eafe ETF Add +0.9% 3.00% +0.14
CSCO Cisco Systems Inc. Add +1.8% 1.39% +0.03
UNH Unitedhealth Group Inc. Add +1.0% 2.45% +0.01
JPM JPMorgan Chase & Co. Add +1.9% 1.77% +0.00
AMZN Amazon.com Inc. Add +2.6% 0.94% −0.16
IJR iShares Core S&P Small-Cap E Add +5.7% 10.03% −0.86

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