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MAS Institutional Ownership & 13F Holders | SmartMoneyDB

MASMASCO CORP

COM · CUSIP 574599106

Smart Money Ownership

Of the 14 tracked institutions holding MAS, 8 have a 3-year clone track record — 5 of them beat the S&P. Average holder's clone alpha: +2.5pt. It's a gauge of who owns the name, not just how many.

Jim Simons

$68.5M · 0.1% of book

PRICE T ROWE ASSOCIATES INC /MD/

$18.0M

+2.7pt

MAS (MASCO CORP) Institutional Ownership Summary

Among the 14 tracked institutional investors we monitor, MAS (MASCO CORP) is held with a combined value of $4.31B across 70,027,494 shares. The largest holder is VANGUARD GROUP INC with a position worth $1.77B (0.03% of their portfolio). 2 funds opened new positions in the most recent quarter. 3 funds increased their holdings. 9 funds reduced their position.

Total Institutional Value

$4.31B

Total Shares Held

70,027,494

Institutional Holders

% of Shares Outstanding

34.7%

of 201.73M shares · SEC 2026-03-31

Days to Cover

4.0-20.3%

8.63M shares short · FINRA 2026-07-15

Tracked 13F institutions hold 34.7% of MAS's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-03-31), not a live float.

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

RENAISSANCE TECHNOLOGIES LLC+27% shares~$14.6M AQR CAPITAL MANAGEMENT LLC+27% shares~$12.7M Gotham Asset Management, LLC+11% shares~$2.7M Bridgewater Associates, LPNew position~$1.5M Grantham, Mayo, Van Otterloo & Co. LLCNew position~$374.6K

13F Institutional Holders

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HARRIS ASSOCIATES L P

0.69% of book-25.3%

$518.98M

WELLINGTON MANAGEMENT GROUP LLP

0.05% of book-12.2%

$255.69M

RENAISSANCE TECHNOLOGIES LLC

0.11% of book+27.1%

$68.47M

AQR CAPITAL MANAGEMENT LLC

0.03% of book+27.0%

$59.96M

Gotham Asset Management, LLC

MILLENNIUM MANAGEMENT LLC

0.01% of book-25.8%

$20.15M

#	Fund	Value↓	Shares	Portfolio %	Change
1	VANGUARD GROUP INC	$1.77B	27,823,347	0.03%	-1.2%
2	BlackRock, Inc.	$942.89M	15,618,560	0.02%	-5.3%
3	STATE STREET CORP	$601.24M	9,959,319	0.02%	-2.7%
4	HARRIS ASSOCIATES L P	$518.98M	8,596,734	0.69%	-25.3%
5	WELLINGTON MANAGEMENT GROUP LLP	$255.69M	4,235,338	0.05%	-12.2%
6	RENAISSANCE TECHNOLOGIES LLC	$68.47M	1,134,114	0.11%	+27.1%
7	AQR CAPITAL MANAGEMENT LLC	$59.96M	1,004,689	0.03%	+27.0%
8	Gotham Asset Management, LLC	$26.72M	442,586	0.08%	+11.3%
9	FMR LLC	$22.12M	366,422	0.00%	-5.5%
10	MILLENNIUM MANAGEMENT LLC	$20.15M	333,789	0.01%	-25.8%

Congress Trading

1 member · 1 disclosed trade in MAS

Member	Type	Amount	Date
Julie Johnson	Sell	$1,001 - $15,000	Apr 7, 2025

Frequently Asked Questions

Which institutional investors own the most MAS stock?

As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of MAS with a position worth $1.77B, representing 0.03% of their portfolio. In total, 14 institutional investors hold MAS with a combined value of $4.31B.

Are hedge funds buying or selling MAS?

In the most recent quarter, 2 funds opened a new position in MAS. Additionally, 3 increased their holdings and 9 reduced their positions.

What percentage of MAS is owned by institutional investors?

Institutional investors hold $4.31B worth of MAS stock across 14 positions. The largest institutional holder is VANGUARD GROUP INC with $1.77B in holdings.

What is a 13F filing and why does it matter for MAS?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MAS, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track MAS institutional moves

Get notified when hedge funds change their MAS positions.