Corundum Trust Company, INC — 13F Holdings & Portfolio
CIK 1987720 · latest 13F-HR filed 2026-10-29
Corundum Trust Company, INC manages $37.8M in 13F-reported U.S. long-equity assets across 28 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are MMM (17.08%), IJR (11.24%), DVY (7.59%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 1 new position and exited 1; 5 existing positions rose in reported value and 6 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-10-29
vs 2026-06-30
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q3 26Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q2 26 → Q3 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 74.4%Cumulative share of the portfolio held in the largest N positions.
As of the firm’s regulatory filing dated Oct 19, 2026.
SUITE 200
COLORADO SPRINGS, CO 80903
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| CORUNDUM HOLDINGS, INC. Control | SHAREHOLDER since Apr 2006 | 75% or more | Domestic Entity |
| COUTTS, TIMOTHY, E Control | DIRECTOR OF CORUNDUM HOLDINGS, INC. since Oct 2010 | Less than 5% | Individual |
| FOSS, JOHN, ROBERT Control | EXECUTIVE VICE PRESIDENT since Jul 2023 | Less than 5% | Individual |
| JOHNSON, JILL, MARJORIE Control | PRESIDENT since Jul 2023 | Less than 5% | Individual |
| JOHNSON, RONALD, STEVEN Control | FOUNDER since May 2017 | Less than 5% | Individual |
| LEVEILLE, JUSTIN, ANDRE Control | VICE PRESIDENT OF OPERATIONS since May 2017 | Less than 5% | Individual |
| SCHNEIDER, STEVEN Control | CHAIRMAN & CEO OF CORUNDUM HOLDINGS, INC. since Jan 2024 | Less than 5% | Individual |
| STARR, MELISSA, MARIE Control | CHIEF COMPLIANCE OFFICER & CHIEF OPERATIONS OFFICER since Dec 2022 | Less than 5% | Individual |
| JOHNSON, RONALD, STEVEN Control Indirect owner via CORUNDUM HOLDINGS, INC. | FOUNDER since Apr 2006 | 25–50% | Individual |
Ownership & leadership changes · 15 filings with changes since Mar 22, 2012
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
- ChangedCOUTTS, TIMOTHY, E · title DIRECTOR → DIRECTOR OF CORUNDUM HOLDINGS, INC.
- ChangedSCHNEIDER, STEVEN · title CHAIRMAN → CHAIRMAN & CEO OF CORUNDUM HOLDINGS, INC.
- ChangedFOSS, JOHN, ROBERT · title PRESIDENT → EXECUTIVE VICE PRESIDENT
- ChangedJOHNSON, JILL, MARJORIE · title VICE PRESIDENT, DIRECTOR → PRESIDENT
- ChangedJOHNSON, RONALD, STEVEN · indirect via CORUNDUM HOLDINGS, INC.: title PRESIDENT & CEO → FOUNDER
- ChangedJOHNSON, RONALD, STEVEN · title CHAIRMAN → FOUNDER
- ChangedSCHNEIDER, STEVEN · title DIRECTOR → CHAIRMAN
- No longer listedCOUTTS, TIMOTHY, E · DIRECTOR · Less than 5% · control person · listed since Oct 2010
- No longer listedFoss, John, Robert · PRESIDENT AND CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Jul 2017
- No longer listedSCHNEIDER, STEVEN · DIRECTOR · Less than 5% · control person · listed since Apr 2015
- AddedCOUTTS, TIMOTHY, E · DIRECTOR · Less than 5% · control person
- AddedFOSS, JOHN, ROBERT · PRESIDENT · Less than 5% · control person
- AddedSCHNEIDER, STEVEN · DIRECTOR · Less than 5% · control person
- ChangedJOHNSON, RONALD, STEVEN · indirect via CORUNDUM HOLDINGS, INC.: ownership 50–75% → 25–50%
- ChangedSTARR, MELISSA, MARIE · title CHIEF OPERATIONS AND COMPLIANCE OFFICER → CHIEF COMPLIANCE OFFICER & CHIEF OPERATIONS OFFICER
- No longer listedJOHNSON, RONALD, STEVEN · PRESIDENT & CEO · 50–75% · indirect via CENTRAL BANCORP, INC. · control person · listed since Apr 2006
- AddedJOHNSON, RONALD, STEVEN · PRESIDENT & CEO · 50–75% · indirect via CORUNDUM HOLDINGS, INC. · control person
- No longer listedCENTRAL BANCORP, INC. · SHAREHOLDER · 75% or more · control person · listed since Apr 2006
- No longer listedREED, JAMIE, LEE · SENIOR VICE PRESIDENT · Less than 5% · control person · listed since Apr 2020
- AddedCORUNDUM HOLDINGS, INC. · SHAREHOLDER · 75% or more · control person
- AddedSTARR, MELISSA, MARIE · CHIEF OPERATIONS AND COMPLIANCE OFFICER · Less than 5% · control person
- ChangedJOHNSON, JILL, MARJORIE · title VICE PRESIDENT → VICE PRESIDENT, DIRECTOR
- AddedREED, JAMIE, LEE · SENIOR VICE PRESIDENT · Less than 5% · control person
- AddedSCHNEIDER, STEVEN · DIRECTOR · Less than 5% · control person
- Listed againCOUTTS, TIMOTHY, E · DIRECTOR · Less than 5% · control person
- No longer listedCOUTTS, TIMOTHY, E · CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Apr 2015
- ChangedFoss, John, Robert · title VICE PRESIDENT OF OPERATIONS → PRESIDENT AND CHIEF COMPLIANCE OFFICER
- ChangedJOHNSON, RONALD, STEVEN · title PRESIDENT → CHAIRMAN
- ChangedLEVEILLE, JUSTIN, ANDRE · title CHIEF OF STAFF → VICE PRESIDENT OF OPERATIONS
- No longer listedKITCHEN, JOHN, HAROLD · SENIOR VICE PRESIDENT · Less than 5% · control person · listed since Jan 2016
Older changes (6 more filings)
- AddedFoss, John, Robert · VICE PRESIDENT OF OPERATIONS · Less than 5% · control person
- AddedJOHNSON, JILL, MARJORIE · VICE PRESIDENT · Less than 5% · control person
- AddedKITCHEN, JOHN, HAROLD · SENIOR VICE PRESIDENT · Less than 5% · control person
- No longer listedHALE, LUCAS, MATTHEW · CHIEF OPERATING OFFICER · Less than 5% · control person · listed since Oct 2014
- No longer listedCONDON, STEVEN, PAUL · PRESIDENT, CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Apr 2006
- AddedCOUTTS, TIMOTHY, E · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
- Listed againLEVEILLE, JUSTIN, ANDRE · CHIEF OF STAFF · Less than 5% · control person
- ChangedHALE, LUCAS, MATTHEW · now a control person
- ChangedJOHNSON, RONALD, STEVEN · title VICE PRESIDENT → PRESIDENT
- No longer listedLEVEILLE, JUSTIN, ANDRE · CHIEF OPERATING OFFICER · Less than 5% · control person · listed since Apr 2006
- AddedHALE, LUCAS, MATTHEW · CHIEF OPERATING OFFICER · Less than 5%
- ChangedJOHNSON, RONALD, STEVEN · indirect via CENTRAL BANCORP, INC.: ownership 25–50% → 50–75%
- ListedCENTRAL BANCORP, INC. · SHAREHOLDER · 75% or more · control person
- ListedCONDON, STEVEN, PAUL · PRESIDENT, CHIEF COMPLIANCE OFFICER · Less than 5% · control person
- ListedJOHNSON, RONALD, STEVEN · VICE PRESIDENT · Less than 5% · control person
- ListedJOHNSON, RONALD, STEVEN · PRESIDENT & CEO · 25–50% · indirect via CENTRAL BANCORP, INC. · control person
- ListedLEVEILLE, JUSTIN, ANDRE · CHIEF OPERATING OFFICER · Less than 5% · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- MICROSOFT CORP$669.0K +37.2%
- APPLE INC$277.3K +14.7%
- SOLVENTUM CORPORATION COMMON S$108.1K +14.3%
- THERMO FISHER SCIENTIFIC INC$86.8K +34.6%
- MERCK & CO INC$30.7K +13.1%
Top Trims
- ISHARES CORE S&P SMALL CAP ETF-$397.2K -8.6%
- ISHARES S&P MID CAP 400 GROWTH-$176.4K -6.7%
- ISHARES S&P MID CAP 400 VALUE-$131.9K -6.8%
- CISCO SYSTEMS INC-$76.2K -8.4%
- UNITEDHEALTH GROUP INC-$72.8K -11.7%
Corundum Trust Company, INC Holdings (2026-09-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | 3M COMPANY | MMM | 88579Y101 | $6.4M | 17.08% | 39,280 | SH |
| 2 | ISHARES CORE S&P SMALL CAP ETF | IJR | 464287804 | $4.2M | 11.24% | 31,198 | SH |
| 3 | ISHARES SELECT DIVIDEND ETF | DVY | 464287168 | $2.9M | 7.59% | 18,840 | SH |
| 4 | ISHARES CORE S&P 500 ETF | IVV | 464287200 | $2.5M | 6.71% | 3,306 | SH |
| 5 | MICROSOFT CORP | MSFT | 594918104 | $2.5M | 6.54% | 4,812 | SH |
| 6 | ISHARES S&P MID CAP 400 GROWTH | IJK | 464287606 | $2.5M | 6.49% | 22,354 | SH |
| 7 | APPLE INC | AAPL | 037833100 | $2.2M | 5.72% | 6,491 | SH |
| 8 | ISHARES S&P MID CAP 400 VALUE | IJJ | 464287705 | $1.8M | 4.80% | 13,166 | SH |
| 9 | ALPHABET INC CLASS C CAPITAL S | GOOG | 02079K107 | $1.8M | 4.78% | 5,296 | SH |
| 10 | ISHARES MSCI EAFE ETF | EFA | 464287465 | $1.3M | 3.48% | 12,639 | SH |
| 11 | ELI LILLY & CO | LLY | 532457108 | $1.3M | 3.36% | 1,095 | SH |
| 12 | STATE STREET SPDR S&P 500 ETF | SPY | 78462F103 | $932.7K | 2.47% | 1,223 | SH |
| 13 | SOLVENTUM CORPORATION COMMON S | SOLV | 83444M101 | $866.6K | 2.29% | 9,831 | SH |
| 14 | CISCO SYSTEMS INC | CSCO | 17275R102 | $834.8K | 2.21% | 7,756 | SH |
| 15 | JPMORGAN CHASE & CO | JPM | 46625H100 | $819.1K | 2.17% | 2,476 | SH |
| 16 | VANGUARD RUSSELL 3000 ETF | VTHR | 92206C599 | $634.8K | 1.68% | 1,892 | SH |
| 17 | UNITEDHEALTH GROUP INC | UNH | 91324P102 | $550.3K | 1.46% | 1,499 | SH |
| 18 | ISHARES S&P 500 GROWTH ETF | IVW | 464287309 | $442.4K | 1.17% | 3,110 | SH |
| 19 | CITIGROUP INC COM | C | 172967424 | $429.2K | 1.14% | 3,315 | SH |
| 20 | AMAZON.COM INC | AMZN | 023135106 | $424.3K | 1.12% | 1,703 | SH |
| 21 | UNION PACIFIC CORP | UNP | 907818108 | $376.1K | 1.00% | 1,382 | SH |
| 22 | UGI CORPORATION | UGI | 902681105 | $348.6K | 0.92% | 9,773 | SH |
| 23 | THERMO FISHER SCIENTIFIC INC | TMO | 883556102 | $337.5K | 0.89% | 500 | SH |
| 24 | BERKSHIRE HATHAWAY CLASS B | BRK.B | 084670702 | $325.2K | 0.86% | 653 | SH |
| 25 | ISHARES MSCI EMERGING MARKETS | EEM | 464287234 | $321.3K | 0.85% | 4,810 | SH |
| 26 | MERCK & CO INC | MRK | 58933Y105 | $265.0K | 0.70% | 1,824 | SH |
| 27 | ISHARES S&P 500 VALUE ETF | IVE | 464287408 | $258.0K | 0.68% | 1,130 | SH |
| 28 | TARGET CORP | TGT | 87612E106 | $228.8K | 0.61% | 1,460 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-09-30 | 2026-10-29 | $37.8M | 28 | 0001987720-26-000004 |
| 2026-06-30 | 2026-07-29 | $37.4M | 28 | 0001987720-26-000003 |
| 2026-03-31 | 2026-04-15 | $43.8M | 48 | 0001987720-26-000002 |
| 2025-12-31 | 2026-01-20 | $43.9M | 51 | 0001987720-26-000001 |
SUITE 303
SIOUX FALLS, SD 57103