Masco Corporation
Masco Corporation (MAS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MAS · as of Sep 30, 2025
Ownership Breakdown
893
Institutional Holders
▲ 25 vs Q2
$14.04B
Total Inst. Value
▲ $1.18B vs Q2
201.73M
Shares Outstanding
freeFloat 99.67%
199.55M
13F Shares Held
▼ 112,668 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MAS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC heating equip, except elec & warm air; & plumbing fixtures | 28.15M | 13.41% | 13.41% | $1.98T | Nov 7, 2025 | ▼ 721.1K |
BLACKROCK, INC. heating equip, except elec & warm air; & plumbing fixtures | 16.05M | 7.64% | 7.64% | $1.13T | Nov 12, 2025 | ▼ 24.8K |
STATE STREET CORP heating equip, except elec & warm air; & plumbing fixtures | 10.18M | 4.85% | 4.85% | $716.22B | Nov 14, 2025 | ▲ 367.9K |
HARRIS ASSOCIATES L P heating equip, except elec & warm air; & plumbing fixtures | 7.41M | 3.53% | 3.53% | $521.67B | Nov 14, 2025 | ▲ 94.6K |
BOSTON PARTNERS heating equip, except elec & warm air; & plumbing fixtures | 5.85M | 2.79% | 2.79% | $411.83B | Nov 13, 2025 | ▲ 58.6K |
GEODE CAPITAL MANAGEMENT, LLC heating equip, except elec & warm air; & plumbing fixtures | 5.31M | 2.53% | 2.53% | $372.55B | Nov 12, 2025 | ▲ 18.5K |
JPMORGAN CHASE & CO heating equip, except elec & warm air; & plumbing fixtures | 5.09M | 2.42% | 2.42% | $357.98B | Nov 26, 2025 | ▲ 1.24M |
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ heating equip, except elec & warm air; & plumbing fixtures | 4.79M | 2.28% | 2.28% | $336.86B | Oct 29, 2025 | ▼ 112.1K |
NORDEA INVESTMENT MANAGEMENT AB heating equip, except elec & warm air; & plumbing fixtures | 4.10M | 1.95% | 1.95% | $286.40B | Oct 27, 2025 | ▲ 793.6K |
HOLOCENE ADVISORS, LP heating equip, except elec & warm air; & plumbing fixtures | 3.96M | 1.88% | 1.88% | $278.40B | Nov 14, 2025 | ▼ 1.05M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
26
Increased
+10.03M shares2
New Positions
first time holders21
Decreased
−5.48M shares0
Sold Out
fully exitedNet shares change (top 50)
+4.56M
+10.03M / −5.48M
Net new holders
+7
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MAS insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
20
Buy transactions
15
Sell transactions
1.33
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Stevens Charles K. III director | May 8, 2026 | Award | 2,650 | — | — | 18.1K | Form 4 ↗ |
Sandeep Reddy director | May 8, 2026 | Award | 2,650 | — | — | 10.5K | Form 4 ↗ |
PLANT JOHN C director | May 8, 2026 | Award | 2,650 | — | — | 50.6K | Form 4 ↗ |
PAYNE LISA A director | May 8, 2026 | Award | 2,650 | — | — | 16.5K | Form 4 ↗ |
O'HERLIHY CHRISTOPHER A director | May 8, 2026 | Award | 2,650 | — | — | 51.8K | Form 4 ↗ |
Ffolkes Marie A director | May 8, 2026 | Award | 2,650 | — | — | 24.5K | Form 4 ↗ |
Denari Aine director | May 8, 2026 | Award | 2,650 | — | — | 14.0K | Form 4 ↗ |
Coombe Gary A director | May 8, 2026 | Award | 2,650 | — | — | 3.6K | Form 4 ↗ |
Alexander Mark R. director | May 8, 2026 | Award | 2,650 | — | — | 23.5K | Form 4 ↗ |
PAYNE LISA A director | Mar 7, 2026 | Sale | 14,729 | $63.66 | $937.6K | 13.8K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Masco Corporation (MAS) is primarily owned by institutional investors, who hold approximately 98.9% of total shares outstanding. Company insiders own approximately 0.33%, while retail and public investors account for the remaining 0.75%.
The largest institutional shareholder of Masco Corporation is VANGUARD GROUP INC, holding approximately 28.15 million shares — equal to 13.41% of outstanding shares — as of September 30, 2025.
A total of 893 institutional investors currently hold MAS stock, with a combined institutional value of approximately $14.04 billion as of the most recent 13F filing period.
Frequently asked questions
MAS ownershipMasco Corporation (MAS) is primarily owned by institutional investors, who hold approximately 98.9% of shares. The largest shareholder is VANGUARD GROUP INC with a 13.41% stake. Company insiders hold 0.33%. Data sourced from SEC Form 13F as of September 30, 2025.