W.W. Grainger, Inc.
MX ˙ BMV ˙ US3848021040
SecurityMX:GWW / W.W. Grainger, Inc.
InstitutionAlbert D Mason Inc
Latest Disclosed Ownership2,271 shares
Latest Disclosed Value $ 2,477,307
Albert D Mason Inc reports 5.38% increase in ownership of GWW / W.W. Grainger, Inc.

On April 15, 2026 - Albert D Mason Inc filed a 13F-HR form disclosing ownership of 2,271 shares of W.W. Grainger, Inc. (MX:GWW) valued at $2,477,307 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 13, 2026 disclosing 2,155 shares of W.W. Grainger, Inc.. This represents a change in shares of 5.38% 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)
2026-04-15 2026-03-31 13F W.W. Grainger COM 384802104 2,271 116 5.38 2,477 13.94 1.6037
2026-01-13 2025-12-31 13F W.W. Grainger COM 384802104 2,155 7 0.33 2,175 6.20 1.4311
2025-10-15 2025-09-30 13F W.W. Grainger COM 384802104 2,148 156 7.83 2,047 -1.21 1.3331
2025-07-29 2025-06-30 13F W.W. Grainger COM 384802104 1,992 -293 -12.82 2,072 -8.20 1.4998
2025-04-16 2025-03-31 13F W.W. Grainger COM 384802104 2,285 -244 -9.65 2,257 -15.31 1.5346
2025-01-15 2024-12-31 13F W.W. Grainger COM 384802104 2,529 -35 -1.37 2,666 0.08 1.7815
2024-10-22 2024-09-30 13F W.W. Grainger COM 384802104 2,564 -6 -0.23 2,664 14.88 1.7061
2024-07-16 2024-06-30 13F W.W. Grainger COM 384802104 2,570 -2 -0.08 2,319 115,800.00 1.5671
2024-04-24 2024-03-31 13F W.W. Grainger COM 384802104 2,572 -1,306 -33.68 3 -33.33 1.6182
2024-01-03 2023-12-31 13F W.W. Grainger COM 384802104 3,878 -14 -0.36 3 50.00 2.1288
2023-10-10 2023-09-30 13F W.W. Grainger COM 384802104 3,892 -85 -2.14 3 -33.33 1.9487
2023-07-25 2023-06-30 13F W.W. Grainger COM 384802104 3,977 -5 -0.13 3 50.00 2.1489
2023-04-11 2023-03-31 13F W.W. Grainger COM 384802104 3,982 -38 -0.95 3 0.00 1.9021
2023-01-11 2022-12-31 13F W.W. Grainger COM 384802104 4,020 18 0.45 2 -99.90 1.5956
2022-10-12 2022-09-30 13F W.W. Grainger COM 384802104 4,002 -575 -12.56 1,958 -5.87 1.5692
2022-07-12 2022-06-30 13F W.W. Grainger COM 384802104 4,577 -30 -0.65 2,080 -12.46 1.5463
2022-04-20 2022-03-31 13F W.W. Grainger COM 384802104 4,607 -14 -0.30 2,376 -0.79 1.5285
2022-01-25 2021-12-31 13F W.W. Grainger COM 384802104 4,621 5 0.11 2,395 32.03 1.4277
2021-10-13 2021-09-30 13F W.W. Grainger COM 384802104 4,616 6 0.13 1,814 -10.15 1.1684
2021-07-14 2021-06-30 13F W.W. Grainger COM 384802104 4,610 -93 -1.98 2,019 7.05 1.2390
2021-04-14 2021-03-31 13F W.W. Grainger COM 384802104 4,703 -500 -9.61 1,886 -11.25 1.2314
2021-01-12 2020-12-31 13F W.W. Grainger COM 384802104 5,203 -29 -0.55 2,125 13.82 1.4773
2020-10-20 2020-09-30 13F W.W. Grainger COM 384802104 5,232 18 0.35 1,867 13.98 1.5303
2020-07-21 2020-06-30 13F W.W. Grainger COM 384802104 5,214 0 0.00 1,638 26.39 1.3801
2020-04-15 2020-03-31 13F W.W. Grainger COM 384802104 5,214 275 5.57 1,296 -22.49 1.3049
2020-01-21 2019-12-31 13F W.W. Grainger COM 384802104 4,939 5 0.10 1,672 14.05 1.1811
2019-10-23 2019-09-30 13F W.W. Grainger COM 384802104 4,934 40 0.82 1,466 11.65 1.0971
2019-07-30 2019-06-30 13F W.W. Grainger COM 384802104 4,894 -30 -0.61 1,313 -11.40 0.9854
2019-04-30 2019-03-31 13F W.W. Grainger COM 384802104 4,924 -540 -9.88 1,482 -3.95 1.0852
2019-01-29 2018-12-31 13F W.W. Grainger COM 384802104 5,464 -310 -5.37 1,543 -25.24 1.2498
2018-10-30 2018-09-30 13F W.W. Grainger COM 384802104 5,774 -99 -1.69 2,064 13.97 1.4093
2018-07-31 2018-06-30 13F Grainger, WW COM 384802104 5,873 -1,696 -22.41 1,811 -15.26 1.3082
2018-05-02 2018-03-31 13F Grainger, WW COM 384802104 7,569 -135 -1.75 2,137 17.42 1.6078
2018-02-06 2017-12-31 13F Grainger, WW COM 384802104 7,704 115 1.52 1,820 33.43 1.3676
2017-10-18 2017-09-30 13F Grainger, WW COM 384802104 7,589 60 0.80 1,364 0.37 1.0964
2017-07-25 2017-06-30 13F Grainger, WW COM 384802104 7,529 2,048 37.37 1,359 6.50 1.1357
2017-05-02 2017-03-31 13F Grainger, WW COM 384802104 5,481 35 0.64 1,276 0.87 1.0826
2017-02-01 2016-12-31 13F Grainger, WW COM 384802104 5,446 -12,736 -70.05 1,265 -69.06 1.1037
2016-10-25 2016-09-30 13F Grainger, WW COM 384802104 18,182 7,796 75.06 4,088 73.22 1.3175
2016-07-19 2016-06-30 13F Grainger, WW COM 384802104 10,386 0 0.00 2,360 -2.64 1.3704
2016-04-27 2016-03-31 13F Grainger, WW COM 384802104 10,386 0 0.00 2,424 15.21 1.4838
2016-01-20 2015-12-31 13F Grainger, WW COM 384802104 10,386 -2,549 -19.71 2,104 -24.34 1.3735
2015-10-13 2015-09-30 13F Grainger, WW COM 384802104 12,935 -837 -6.08 2,781 -14.67 1.7192
2015-07-22 2015-06-30 13F Grainger, WW COM 384802104 13,772 -10,983 -44.37 3,259 -44.17 1.7605
2015-05-06 2015-03-31 13F Grainger, WW COM 384802104 24,755 -8,075 -24.60 5,837 -30.25 1.2142
2015-02-18 2014-12-31 13F/A-1 Grainger, WW COM 384802104 28,810 -3,850 7,343 1.6355
2015-02-26 2014-12-31 13F/A-2 Grainger, WW COM 384802104 32,830 170 0.52 8,368 1.81 1.6693
2015-02-11 2014-12-31 13F Grainger, WW COM 384802104 17,960 4,578
2015-02-26 2014-09-30 13F/A-1 Grainger, WW COM 384802104 32,660 -235 -0.71 8,219 -1.73 1.6140
2014-10-14 2014-09-30 13F Grainger, WW COM 384802104 17,960 4,520
2015-02-25 2014-06-30 13F/A-1 Grainger, WW COM 384802104 32,895 2,590 8.55 8,364 9.23 1.5219
2014-07-30 2014-06-30 13F Grainger, WW COM 384802104 18,385 4,675
2014-04-22 2014-03-31 13F Grainger, WW COM 384802104 30,305 0 0.00 7,657 -1.09 1.4963
2014-01-21 2013-12-31 13F Grainger, WW COM 384802104 30,305 -70 -0.23 7,741 -2.62 1.5237
2013-10-29 2013-09-30 13F Grainger, WW COM 384802104 30,375 250 0.83 7,949 4.63 1.6665
2013-08-16 2013-06-30 13F Grainger, WW COM 384802104 30,125 30,125 7,597 1.6785
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.