Masco Corporation
US ˙ NYSE ˙ US5745991068

SecurityMAS / Masco Corporation
InstitutionBlair William & Co/il
Latest Disclosed Ownership7,854 shares
Latest Disclosed Value $ 474,148
Blair William & Co/il reports 24.02% increase in ownership of MAS / Masco Corporation

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 7,854 shares of Masco Corporation (US:MAS) valued at $474,146 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 6,333 shares of Masco Corporation. This represents a change in shares of 24.02% during the quarter. The current value of the position is $545,146 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)
2026-05-08 2026-03-31 13F MASCO COM 574599106 7,854 1,521 24.02 474 18.20 0.0014
2026-02-17 2025-12-31 13F MASCO COM 574599106 6,333 -366 -5.46 402 -14.86 0.0011
2025-11-12 2025-09-30 13F MASCO COM 574599106 6,699 -1,510 -18.39 472 -10.80 0.0013
2025-07-24 2025-06-30 13F MASCO COM 574599106 8,209 1,057 14.78 528 6.24 0.0015
2025-05-09 2025-03-31 13F MASCO COM 574599106 7,152 -3,754 -34.42 497 -37.17 0.0015
2025-02-12 2024-12-31 13F MASCO COM 574599106 10,906 1,174 12.06 791 -3.06 0.0023
2024-11-12 2024-09-30 13F MASCO COM 574599106 9,732 -98 -1.00 817 24.58 0.0024
2024-08-12 2024-06-30 13F MASCO COM 574599106 9,830 314 3.30 655 -12.67 0.0020
2024-05-09 2024-03-31 13F MASCO COM 574599106 9,516 165 1.76 751 19.81 0.0024
2024-02-12 2023-12-31 13F MASCO COM 574599106 9,351 -2,273 -19.55 626 0.81 0.0021
2023-11-09 2023-09-30 13F MASCO COM 574599106 11,624 -2,788 -19.34 621 -24.82 0.0024
2023-08-11 2023-06-30 13F MASCO COM 574599106 14,412 2,264 18.64 827 36.98 0.0030
2023-05-12 2023-03-31 13F MASCO COM 574599106 12,148 5,905 94.59 604 107.22 0.0024
2023-02-10 2022-12-31 13F MASCO COM 574599106 6,243 -231 -3.57 291 -3.64 0.0013
2022-11-09 2022-09-30 13F MASCO COM 574599106 6,474 -2,911 -31.02 302 -36.42 0.0014
2022-08-10 2022-06-30 13F MASCO COM 574599106 9,385 1,409 17.67 475 16.71 0.0021
2022-05-13 2022-03-31 13F MASCO COM 574599106 7,976 -349 -4.19 407 -30.43 0.0014
2022-02-14 2021-12-31 13F MASCO COM 574599106 8,325 299 3.73 585 31.17 0.0018
2021-11-12 2021-09-30 13F MASCO COM 574599106 8,026 2,706 50.86 446 42.49 0.0015
2021-08-12 2021-06-30 13F MASCO COM 574599106 5,320 -222 -4.01 313 -5.72 0.0011
2021-05-13 2021-03-31 13F MASCO COM 574599106 5,542 -532 -8.76 332 -0.60 0.0013
2021-02-09 2020-12-31 13F MASCO COM 574599106 6,074 9 0.15 334 0.00 0.0012
2020-11-06 2020-09-30 13F MASCO COM 574599106 6,065 -772 -11.29 334 -2.62 0.0014
2020-08-12 2020-06-30 13F MASCO COM 574599106 6,837 691 11.24 343 61.79 0.0016
2020-05-11 2020-03-31 13F MASCO COM 574599106 6,146 -431 -6.55 212 -32.91 0.0013
2020-02-13 2019-12-31 13F MASCO COM 574599106 6,577 6,577 316 0.0016
2017-11-13 2017-09-30 13F MASCO COM 574599106 0 -60,787 -100.00 0 -100.00
2017-08-04 2017-06-30 13F MASCO COM 574599106 60,787 -96,439 -61.34 2,323 -56.37 0.0174
2017-05-10 2017-03-31 13F MASCO COM 574599106 157,226 1,775 1.14 5,324 8.32 0.0429
2017-02-14 2016-12-31 13F MASCO COM 574599106 155,451 91,725 143.94 4,915 124.84 0.0440
2016-11-14 2016-09-30 13F MASCO COM 574599106 63,726 -2,654 -4.00 2,186 6.43 0.0193
2016-08-08 2016-06-30 13F MASCO COM 574599106 66,380 2,740 4.31 2,054 2.65 0.0192
2016-05-16 2016-03-31 13F MASCO COM 574599106 63,640 63,640 0.00 2,001 0.0188
2014-11-04 2014-09-30 13F MASCO COM 574599106 0 -66,884 -100.00 0 -100.00
2014-08-01 2014-06-30 13F MASCO COM 574599106 66,884 13,510 25.31 1,485 25.32 0.0024
2014-05-06 2014-03-31 13F MASCO COM 574599106 53,374 -854 -1.57 1,185 -4.05 0.0020
2014-02-11 2013-12-31 13F MASCO COM 574599106 54,228 54,228 1,235 0.0020
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.