3M Company
MX ˙ BMV ˙ US88579Y1010
SecurityMX:MMM / 3M Company
InstitutionCorundum Group, Inc.
Latest Disclosed Ownership99,152 shares
Latest Disclosed Value $ 14,399,845
Corundum Group, Inc. reports 1.18% increase in ownership of MMM / 3M Company

On April 20, 2026 - Corundum Group, Inc. filed a 13F-HR form disclosing ownership of 99,152 shares of 3M Company (MX:MMM) valued at $14,399,845 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 97,999 shares of 3M Company. This represents a change in shares of 1.18% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-20 2026-03-31 13F 3M CS 88579Y101 99,152 1,153 1.18 14,400 -8.22 4.8128
2026-01-12 2025-12-31 13F 3M CS 88579Y101 97,999 153 0.16 15,690 3.33 5.2649
2025-10-24 2025-09-30 13F 3M CS 88579Y101 97,846 -306 -0.31 15,184 1.61 6.2385
2025-07-21 2025-06-30 13F 3M CS 88579Y101 98,152 -1,688 -1.69 14,943 1.91 6.6070
2025-04-23 2025-03-31 13F 3M CS 88579Y101 99,840 -4,706 -4.50 14,663 8.65 7.0321
2025-01-16 2024-12-31 13F 3M CS 88579Y101 104,546 4,820 4.83 13,496 -1.00 5.0394
2024-10-21 2024-09-30 13F 3M CS 88579Y101 99,726 -4,801 -4.59 13,633 27.63 6.2195
2024-07-17 2024-06-30 13F 3M CS 88579Y101 104,527 5,653 5.72 10,682 1.85 4.1732
2024-04-15 2024-03-31 13F 3M CS 88579Y101 98,874 4,050 4.27 10,488 1.17 5.0581
2024-01-24 2023-12-31 13F 3M CS 88579Y101 94,824 -7,426 -7.26 10,366 8.30 5.1974
2023-10-17 2023-09-30 13F 3M CS 88579Y101 102,250 -133 -0.13 9,573 -6.59 5.4391
2023-07-21 2023-06-30 13F 3M CS 88579Y101 102,383 10,388 11.29 10,248 5.98 5.1111
2023-04-24 2023-03-31 13F 3M CS 88579Y101 91,995 3,860 4.38 9,670 96,590.00 4.5739
2023-01-12 2022-12-31 13F 3M CS 88579Y101 88,135 256 0.29 11 -99.90 5.9679
2022-10-18 2022-09-30 13F 3M CS 88579Y101 87,879 28,065 46.92 9,711 25.45 6.1092
2022-07-25 2022-06-30 13F 3M CS 88579Y101 59,814 592 1.00 7,741 -12.20 5.2296
2022-05-02 2022-03-31 13F 3M CS 88579Y101 59,222 2,346 4.12 8,817 -12.73 8.1945
2022-02-07 2021-12-31 13F 3M CS 88579Y101 56,876 437 0.77 10,103 2.04 6.5776
2021-11-02 2021-09-30 13F 3M CS 88579Y101 56,439 -56,296 -49.94 9,901 -55.79 7.3405
2021-08-02 2021-06-30 13F 3M CS 88579Y101 112,735 65,645 139.40 22,393 146.81 14.6864
2021-05-10 2021-03-31 13F 3M CS 88579Y101 47,090 71 0.15 9,073 10.40 7.0906
2021-02-03 2020-12-31 13F 3M CS 88579Y101 47,019 72 0.15 8,218 9.28 6.8474
2020-11-12 2020-09-30 13F/A-1 3M CS 88579Y101 46,947 -2,079 -4.24 7,520 -1.67 7.2849
2020-08-07 2020-06-30 13F/A-1 3M CS 88579Y101 49,026 -19 -0.04 7,648 14.23 9.1713
2020-05-07 2020-03-31 13F/A-1 3M CS 88579Y101 49,045 -120 -0.24 6,695 -22.82 9.5194
2020-01-28 2019-12-31 13F 3M CS 88579Y101 49,165 271 0.55 8,674 7.91 9.1090
2019-11-01 2019-09-30 13F/A-1 3M CS 88579Y101 48,894 656 1.36 8,038 -3.87 9.3107
2019-08-02 2019-06-30 13F 3M CS 88579Y101 48,238 -583 -1.19 8,362 -17.57 9.6071
2019-05-08 2019-03-31 13F 3M CS 88579Y101 48,821 -2,195 -4.30 10,144 4.36 11.6055
2019-02-19 2018-12-31 13F 3M CS 88579Y101 51,016 1,986 4.05 9,720 0.78 8.9233
2018-08-07 2018-06-30 13F 3M CS 88579Y101 49,030 -51,188 -51.08 9,645 -56.16 11.8908
2018-05-08 2018-03-31 13F 3M CS 88579Y101 100,218 -106 -0.11 22,000 -6.83 23.7912
2018-02-13 2017-12-31 13F 3M COM 88579Y101 100,324 86,308 615.78 23,613 -19.74 25.4821
2017-11-03 2017-09-30 13F 3M COM 88579Y101 14,016 -122,721 -89.75 29,420 3.35 31.0089
2017-08-01 2017-06-30 13F 3M CS 88579Y101 136,737 -1,056 -0.77 28,467 7.98 63.0680
2017-04-18 2017-03-31 13F 3M CS 88579Y101 137,793 90 0.07 26,364 7.14 33.2442
2017-02-09 2016-12-31 13F 3M CS 88579Y101 137,703 -90 -0.07 24,606 1.33 36.1683
2016-11-04 2016-09-30 13F 3M CS 88579Y101 137,793 -7,600 -5.23 24,283 -4.63 39.2706
2016-07-29 2016-06-30 13F 3M CS 88579Y101 145,393 95 0.07 25,461 5.16 39.1593
2016-05-16 2016-03-31 13F 3M CS 88579Y101 145,298 -50 -0.03 24,211 10.31 63.7954
2016-02-11 2015-12-31 13F 3M CS 88579Y101 145,348 80 0.06 21,948 6.57 65.6457
2015-11-05 2015-09-30 13F 3M CS 88579Y101 145,268 25 0.02 20,595 -8.10 73.0060
2015-08-11 2015-06-30 13F 3M CS 88579Y101 145,243 -25 -0.02 22,411 -6.47 78.9620
2015-05-08 2015-03-31 13F 3M CS 88579Y101 145,268 145,268 0.00 23,962 80.9746
2015-02-05 2014-12-31 13F 3M CS 88579Y101 0 -112,211 -100.00 0 -100.00
2014-11-04 2014-09-30 13F 3M CS 88579Y101 112,211 0 0.00 15,898 -1.09 75.3674
2014-08-05 2014-06-30 13F 3M CS 88579Y101 112,211 -4,396 -3.77 16,073 1.61 75.3610
2014-05-08 2014-03-31 13F 3M CS 88579Y101 116,607 -36 -0.03 15,819 -3.30 76.6424
2014-02-19 2013-12-31 13F 3M CS 88579Y101 116,643 -10 -0.01 16,359 17.44 76.8317
2013-11-13 2013-09-30 13F 3M CS 88579Y101 116,653 -100 -0.09 13,930 9.11 78.0217
2013-08-13 2013-06-30 13F 3M CS 88579Y101 116,753 116,753 12,767 78.5952
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.