Masco Corporation
US ˙ NYSE ˙ US5745991068

SecurityMAS / Masco Corporation
InstitutionImpax Asset Management Group plc
Latest Disclosed Ownership2,377,161 shares
Latest Disclosed Value $ 143,509,210
Impax Asset Management Group plc reports 12.31% decrease in ownership of MAS / Masco Corporation

On May 12, 2026 - Impax Asset Management Group plc filed a 13F-HR form disclosing ownership of 2,377,161 shares of Masco Corporation (US:MAS) valued at $143,509,210 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 2,710,763 shares of Masco Corporation. This represents a change in shares of -12.31% during the quarter. The current value of the position is $164,998,745 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)
2026-05-12 2026-03-31 13F Masco Common Stock 574599106 2,377,161 -333,602 -12.31 143,509 -16.58 1.0004
2026-01-29 2025-12-31 13F Masco Common Stock 574599106 2,710,763 227,803 9.17 172,025 -1.57 1.0762
2025-11-06 2025-09-30 13F Masco Common Stock 574599106 2,482,960 -152,183 -5.78 174,776 3.05 1.0199
2025-08-08 2025-06-30 13F Masco Common Stock 574599106 2,635,143 390,802 17.41 169,598 8.67 0.9751
2025-04-29 2025-03-31 13F Masco Common Stock 574599106 2,244,341 -50,580 -2.20 156,071 -6.29 0.9399
2025-02-04 2024-12-31 13F Masco Common Stock 574599106 2,294,921 -247,340 -9.73 166,542 -21.96 0.7542
2024-11-06 2024-09-30 13F/A-1 Masco Common Stock 574599106 2,542,261 -312,795 -10.96 213,397 12.11 0.8402
2024-10-30 2024-09-30 13F Masco Common Stock 574599106 2,542,261 -312,795 213,397 0.8411
2024-11-08 2024-06-30 13F/A-1 Masco Common Stock 574599106 2,855,056 259,205 9.99 190,347 -7.04 0.7749
2024-08-05 2024-06-30 13F Masco Common Stock 574599106 2,855,056 259,205 190,347 0.7757
2024-04-30 2024-03-31 13F Masco Common Stock 574599106 2,595,851 -478,056 -15.55 204,761 -0.55 0.7837
2024-01-26 2023-12-31 13F Masco Common Stock 574599106 3,073,907 -13,077 -0.42 205,890 24.78 0.8266
2023-11-07 2023-09-30 13F/A-1 Masco Common Stock 574599106 3,086,984 -249 -0.01 164,999 -6.86 0.7371
2023-11-07 2023-09-30 13F Masco Common Stock 574599106 3,086,984 164,999
2023-08-07 2023-06-30 13F Masco Common Stock 574599106 3,087,233 44,116 1.45 177,145 17.08 0.7119
2023-05-10 2023-03-31 13F Masco Common Stock 574599106 3,043,117 465,102 18.04 151,304 25.76 0.6321
2023-02-09 2022-12-31 13F Masco Common Stock 574599106 2,578,015 187,421 7.84 120,316 7.79 0.5383
2022-11-08 2022-09-30 13F Masco Common Stock 574599106 2,390,594 13,584 0.57 111,617 -7.20 0.5737
2022-08-11 2022-06-30 13F/A-2 Masco Common Stock 574599106 2,377,010 362,031 17.97 120,277 17.04 0.5863
2022-08-02 2022-06-30 13F Masco Common Stock 574599106 2,014,979 0 102,764 0.4247
2022-05-16 2022-03-31 13F Masco Common Stock 574599106 2,014,979 2,014,979 102,764 0.4247
2019-11-14 2019-09-30 13F Masco Common Stock 574599106 0 -5,597 -100.00 0 -100.00
2019-08-13 2019-06-30 13F Masco Common Stock 574599106 5,597 -35,000 -86.21 220 -86.22 0.0029
2019-05-13 2019-03-31 13F Masco Common Stock 574599106 40,597 0 0.00 1,596 34.46 0.0220
2019-02-14 2018-12-31 13F Masco Common Stock 574599106 40,597 0 0.00 1,187 -20.12 0.0193
2018-11-14 2018-09-30 13F Masco Common Stock 574599106 40,597 40,597 1,486 0.0213
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.