3M Company
US ˙ NYSE ˙ US88579Y1010

SecurityMMM / 3M Company
InstitutionWest Oak Capital, LLC
Latest Disclosed Ownership5,365 shares
Latest Disclosed Value $ 8,325
West Oak Capital, LLC reports 1.61% increase in ownership of MMM / 3M Company

On October 3, 2025 - West Oak Capital, LLC filed a 13F-HR form disclosing ownership of 5,365 shares of 3M Company (US:MMM) valued at $832,541 USD as of September 30, 2025. The entity filed a previous 13F-HR on July 15, 2025 disclosing 5,280 shares of 3M Company. This represents a change in shares of 1.61% during the quarter. The current value of the position is $824,922 USD.

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)
2025-10-03 2025-09-30 13F 3M COM 88579Y101 5,365 85 1.61 8 0.00 0.3301
2025-07-15 2025-06-30 13F 3M COM 88579Y101 5,280 0 0.00 8 14.29 0.3148
2025-04-16 2025-03-31 13F 3M COM 88579Y101 5,280 -350 -6.22 8 0.00 0.2998
2025-01-14 2024-12-31 13F/A-1 3M COM 88579Y101 5,630 100 1.81 7 0.00 0.2571
2025-01-10 2024-12-31 13F 3M COM 88579Y101 5,530 0 7 0.2569
2024-10-18 2024-09-30 13F 3M COM 88579Y101 5,530 -55 -0.98 8 -98.77 0.1405
2024-07-24 2024-06-30 13F 3M COM 88579Y101 5,585 230 4.30 571 0.2297
2024-04-18 2024-03-31 13F 3M COM 88579Y101 5,355 -680 -11.27 1 0.2416
2024-01-18 2023-12-31 13F 3M COM 88579Y101 6,035 -480 -7.37 1 0.3054
2023-10-05 2023-09-30 13F 3M COM 88579Y101 6,515 -130 -1.96 1 -100.00 0.3028
2023-07-19 2023-06-30 13F 3M COM 88579Y101 6,645 -350 -5.00 665 -9.52 0.3231
2023-04-21 2023-03-31 13F 3M COM 88579Y101 6,995 600 9.38 735 0.3724
2023-01-05 2022-12-31 13F 3M COM 88579Y101 6,395 -3,880 -37.76 1 -100.00 0.4007
2022-11-14 2022-09-30 13F/A-1 3M COM 88579Y101 10,275 950 10.19 1,135 -5.97 0.6156
2022-10-28 2022-09-30 13F 3M COM 88579Y101 10,275 950 1,135 0.6147
2022-07-11 2022-06-30 13F 3M COM 88579Y101 9,325 3,165 51.38 1,207 31.62 0.6334
2022-04-20 2022-03-31 13F 3M COM 88579Y101 6,160 3,520 133.33 917 95.52 0.4139
2022-01-12 2021-12-31 13F 3M COM 88579Y101 2,640 0 0.00 469 1.30 0.1725
2021-10-07 2021-09-30 13F 3M COM 88579Y101 2,640 65 2.52 463 -9.39 0.1796
2021-07-20 2021-06-30 13F 3M COM 88579Y101 2,575 125 5.10 511 8.26 0.2014
2021-04-13 2021-03-31 13F 3M COM 88579Y101 2,450 90 3.81 472 14.29 0.2017
2021-01-08 2020-12-31 13F 3M COM 88579Y101 2,360 0 0.00 413 9.26 0.1918
2020-10-09 2020-09-30 13F 3M COM 88579Y101 2,360 -455 -16.16 378 -13.90 0.2079
2020-07-06 2020-06-30 13F 3M COM 88579Y101 2,815 275 10.83 439 26.51 0.2499
2020-04-07 2020-03-31 13F 3M COM 88579Y101 2,540 415 19.53 347 -7.47 0.2375
2020-01-09 2019-12-31 13F 3M COM 88579Y101 2,125 0 0.00 375 7.45 0.2110
2019-10-02 2019-09-30 13F 3M COM 88579Y101 2,125 300 16.44 349 10.44 0.2054
2019-07-12 2019-06-30 13F 3M COM 88579Y101 1,825 0 0.00 316 -16.62 0.1889
2019-04-03 2019-03-31 13F 3M COM 88579Y101 1,825 0 0.00 379 9.22 0.2370
2019-01-08 2018-12-31 13F 3M COM 88579Y101 1,825 0 0.00 348 -9.64 0.2468
2018-10-04 2018-09-30 13F 3M COM 88579Y101 1,825 0 0.00 385 6.96 0.2222
2018-07-05 2018-06-30 13F 3M COM 88579Y101 1,825 0 0.00 359 -10.25 0.2186
2018-04-05 2018-03-31 13F 3M COM 88579Y101 1,825 -150 -7.59 401 -13.79 0.2376
2018-01-05 2017-12-31 13F 3M COM 88579Y101 1,975 0 0.00 465 12.08 0.2853
2017-10-10 2017-09-30 13F 3M COM 88579Y101 1,975 0 0.00 415 0.73 0.2460
2017-07-06 2017-06-30 13F 3M COM 88579Y101 1,975 -783 -28.39 411 -22.01 0.2494
2017-04-06 2017-03-31 13F 3M COM 88579Y101 2,758 1,383 100.58 528 115.10 0.3249
2017-01-04 2016-12-31 13F 3M COM 88579Y101 1,375 0 0.00 246 1.24 0.1645
2016-10-04 2016-09-30 13F 3M COM 88579Y101 1,375 0 0.00 242 0.83 0.1669
2016-07-07 2016-06-30 13F 3M COM 88579Y101 1,375 0 0.00 241 4.80 0.1738
2016-04-05 2016-03-31 13F 3M COM 88579Y101 1,375 0 0.00 229 10.63 0.1764
2016-01-07 2015-12-31 13F 3M COM 88579Y101 1,375 0 0.00 207 6.70 0.1608
2015-10-02 2015-09-30 13F 3M COM 88579Y101 1,375 0 0.00 195 -8.49 0.1573
2015-07-02 2015-06-30 13F 3M COM 88579Y101 1,375 0 0.00 212 -6.19 0.1579
2015-04-02 2015-03-31 13F 3M COM 88579Y101 1,375 -150 -9.84 227 -9.60 0.1663
2015-01-08 2014-12-31 13F 3M COM 88579Y101 1,525 0 0.00 251 15.74 0.1822
2014-10-03 2014-09-30 13F 3M COM 88579Y101 1,525 0 0.00 216 -0.92 0.1618
2014-07-03 2014-06-30 13F 3M COM 88579Y101 1,525 0 0.00 218 5.83 0.1583
2014-04-07 2014-03-31 13F 3M COM 88579Y101 1,525 0 0.00 207 -99.90 0.1517
2014-01-07 2013-12-31 13F 3M COM 88579Y101 1,525 0 0.00 213,881 17.45 0.1577
2013-10-08 2013-09-30 13F 3M COM 88579Y101 1,525 0 0.00 182,100 9.20 0.1425
2013-08-14 2013-06-30 13F 3M COM 88579Y101 1,525 1,525 166,759 0.1391
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.